阅读说明：本技术 电机驱动电路 (Motor drive circuit ) 是由 成高 于 2021-01-08 设计创作，主要内容包括：本申请实施例涉及电子技术领域,公开了一种电机驱动电路。该电机驱动电路包括继电器模块和电机模块,继电器模块包括M个继电器,电机模块包括N个电机,3≤M＜N；继电器模块的一端连接电源,继电器模块的另一端接地；继电器模块,用于控制电机模块中电机驱动和换向。实施该电机驱动电路,有利于减小驱动电路的占用空间。(The embodiment of the application relates to the technical field of electronics and discloses a motor driving circuit. The motor driving circuit comprises a relay module and a motor module, wherein the relay module comprises M relays, the motor module comprises N motors, and M is more than or equal to 3 and is less than N; one end of the relay module is connected with a power supply, and the other end of the relay module is grounded; and the relay module is used for controlling the driving and reversing of the motor in the motor module. The motor driving circuit is beneficial to reducing the occupied space of the driving circuit.)

1. The motor driving circuit is characterized by comprising a relay module and a motor module, wherein the relay module comprises M relays, the motor module comprises N motors, and M is more than or equal to 3 and is less than N; one end of the relay module is connected with a power supply, and the other end of the relay module is grounded;

and the relay module is used for controlling the motor in the motor module to drive and reverse.

2. The motor drive circuit of claim 1 wherein the M relays comprise a first relay and M-1 second relays, and the motor module comprises M-1 sets of motor sub-modules; the first relay is connected with a power supply and the ground, the first relay is used for controlling the motor driving direction of each group of motor sub-modules, and the second relay is connected between the first relay and the motor sub-modules and is connected or disconnected with the first relay and the motor sub-modules, so that the motor of the motor sub-modules is controlled to be driven or stopped to be driven.

3. The motor driving circuit according to claim 2, wherein the first relay includes a first control terminal and a second control terminal respectively connected to a power supply and a ground, each of the second relays includes a third control terminal and a fourth control terminal, the third control terminal is connected to one end of one of the motors in the motor submodule, the fourth control terminal is connected to the second control terminal, and the fourth control terminal is connected to the other end of the motor connected to the third control terminal, and the fourth control terminal is turned on or off to control the driving or stopping of the motor submodule.

4. The motor drive circuit according to claim 3, wherein the first relay includes a first terminal and a third terminal connected to a power supply, a second terminal and a fourth terminal connected to a ground, the first control terminal is connected to the first terminal or the second terminal, the second control terminal is connected to the third terminal or the fourth terminal, the third control terminal is connected to the first control terminal, and the fourth control terminal is connected to or disconnected from the second control terminal.

5. The motor drive circuit according to claim 3 or 4, wherein each of the motor sub-modules includes a first motor and a second motor, the second relay includes a fifth terminal connected to the first terminal of the first motor, a sixth terminal connected to the first terminal of the second motor, the third control terminal is connected to the fifth terminal or the sixth terminal, the second relay further includes a seventh terminal connected to the second control terminal of the first relay, and the fourth control terminal is connected to or disconnected from the seventh terminal.

6. The motor drive circuit of claim 5 wherein the second relay includes an eighth terminal connected to the first control terminal of the first relay, the fourth control terminal being connected to either the seventh terminal or the eighth terminal.

7. The motor driving circuit according to claim 1, wherein the M relays include a first relay and a plurality of second relays, wherein the first relay is used for controlling the connection and disconnection between the motor module and a power source, the second relays are connected to ground and between the motor module and the first relay for controlling the driving direction of the motor module, each of the second relays includes a first control terminal and a second control terminal, the first control terminal and the second control terminal are respectively connected to the power source and the ground, and the first control terminal or the second control terminal is simultaneously connected to two different motors in the motor module.

8. The motor driving circuit according to claim 7, wherein if the number of the motors is an even number, even numbers of the motors are sequentially connected in series, the motor driving circuit further comprises a third relay, wherein the first control terminal of one of the second relays is connected to one terminal of the first motor arranged at the head, the second control terminal is connected to the other terminal of the first motor at the same time, and one terminal of the motor adjacent to the first motor, the first control terminals and the second control terminals of the remaining second relays are connected to one terminals of two adjacent motors in the motor module at the same time, and the third relay comprises a control terminal, and the control terminal of the third relay is connected to one terminal of the motor arranged at the tail and is connected to a power supply or a ground.

9. The motor driving circuit according to claim 7, wherein if the number of the motors is an even number, even numbers of the motors are sequentially connected in series, the motor arranged at the end is connected with the motor arranged at the head to form a loop, the first control terminal of each of the second relays is connected to one end of two adjacent motors in the motor module, and the second control terminal of each of the second relays is simultaneously connected to one end of two adjacent motors in the motor module.

10. The motor driving circuit according to claim 7, wherein if the number of the motors is odd, odd motors are sequentially connected in series, the first control terminal of one of the second relays is connected to one end of the first motor arranged at the head, the second control terminal is simultaneously connected to the other end of the first motor and one end of the motor adjacent to the first motor, and the first control terminals and the second control terminals of the other second relays are simultaneously connected to one ends of two adjacent motors in the motor module.

11. The motor drive circuit of claim 1 wherein said M relays include a first relay for controlling the motor drive direction in said motor module and a plurality of second relays, said first relay including two control terminals each connected to a power supply and ground, respectively; the second relay is connected between the first relay and the motor module and used for controlling the driving of the motor in the motor module, each second relay comprises a first control end and a second control end, and the first control end or the second control end is connected with two different motors in the motor module at the same time.

Technical Field

The application relates to the technical field of electronics, in particular to a motor driving circuit.

Background

Modern automobile development tends to comfort driving. As an important component of a motor vehicle, a motor vehicle seat is provided, the comfort of which is closely related to the comfort of driving.

In the existing drive circuit of the automobile seat motor, one motor is often driven by one relay, and along with the continuous increase of the demand of people for adjusting the direction of the automobile seat, the number of the motors in the drive circuit is increased. While this design may meet customer requirements, it also presents problems: (1) the number of the relays and the number of the motors are in one-to-one relation, and when the yield of the automobile is increased, cost factors are more prominent; (2) more relays also bring more space requirements, and the vehicle requires more space to arrange the relays; (3) more relays also result in increased vehicle weight, which is detrimental to vehicle fuel economy.

Disclosure of Invention

The embodiment of the application discloses a motor driving circuit, which is beneficial to reducing the occupied space of the driving circuit.

The embodiment of the application discloses in a first aspect a motor drive circuit, including: the motor driving circuit comprises a relay module and a motor module, the relay module comprises M relays, the motor module comprises N motors, and M is more than or equal to 3 and is less than N; one end of the relay module is connected with a power supply, and the other end of the relay module is grounded;

and the relay module is used for controlling the motor in the motor module to drive and reverse.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the M relays include one first relay and M-1 second relays, and the electric machine module includes M-1 sets of electric machine sub-modules; the first relay is connected with a power supply and the ground, the first relay is used for controlling the motor driving direction of each group of motor sub-modules, and the second relay is connected between the first relay and the motor sub-modules and is connected or disconnected with the first relay and the motor sub-modules, so that the motor of the motor sub-modules is controlled to be driven or stopped to be driven.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the first relay includes a first control end and a second control end, which are respectively connected to a power supply and a ground, each of the second relays includes a third control end and a fourth control end, the third control end is connected to one end of one of the motors in the motor submodule, the fourth control end is connected to the second control end, and the fourth control end is connected to the other end of the motor connected to the third control end, and the fourth control end is turned on or off, so as to control the driving or stopping of the driving of the motor submodule.

As an optional implementation manner, in the first aspect of the embodiments of the present application, the first relay includes a first terminal and a third terminal connected to a power supply, and a second terminal and a fourth terminal connected to ground, the first control terminal is connected to the first terminal or the second terminal, the second control terminal is connected to the third terminal or the fourth terminal, the third control terminal is connected to the first control terminal, and the fourth control terminal is connected to or disconnected from the second control terminal.

As an optional implementation manner, in the first aspect of the embodiment of the present application, each of the motor sub-modules includes a first motor and a second motor, the second relay includes a fifth terminal connected to the first terminal of the first motor and a sixth terminal connected to the first terminal of the second motor, the third control terminal is connected to the fifth terminal or the sixth terminal, the second relay further includes a seventh terminal connected to the second control terminal of the first relay, and the fourth control terminal is connected to or disconnected from the seventh terminal.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the second relay includes an eighth terminal connected to the first control terminal of the first relay, and the fourth control terminal is connected to the seventh terminal or the eighth terminal.

As an optional implementation manner, in the first aspect of the embodiments of the present application, the M relays include a first relay and a plurality of second relays, where the first relay is used to control on/off of the motor module and the power supply, the second relays are all grounded and connected between the motor module and the first relay, and are used to control the driving direction of the motor module, each of the second relays includes a first control end and a second control end, the first control end and the second control end are both connected to the power supply and the ground, and the first control end or the second control end is connected to two different motors in the motor module at the same time.

As an optional implementation manner, in the first aspect of the embodiment of the present application, if the number of the motors is an even number, the even number of the motors are sequentially connected in series, the motor driving circuit further includes a third relay, wherein the first control end of one of the second relays is connected to one end of the first motor arranged at the head, the second control ends are simultaneously connected to the other end of the first motor, and one end of the motor adjacent to the first motor, the first control ends and the second control ends of the remaining second relays are simultaneously connected to one ends of two adjacent motors in the motor module, and the third relay includes a control end, and the control end of the third relay is connected to one end of the motor arranged at the tail, and is connected to the power supply or the ground.

As an optional implementation manner, in the first aspect of the embodiment of the present application, if the number of the motors is an even number, the even number of motors are sequentially connected in series, the motor arranged at the end is connected with the motor arranged at the head to form a loop, the first control end of each second relay is connected to one end of two adjacent motors in the motor module, and the second control end of each second relay is simultaneously connected to one end of two adjacent motors in the motor module.

As an optional implementation manner, in the first aspect of the embodiment of the present application, if the number of the motors is odd, odd motors are sequentially connected in series, one of the first control ends of the second relays is connected to one end of the first motor arranged at the head, the second control end is connected to the other end of the first motor, and one end of the motor adjacent to the first motor, and the other of the first control end and the second control end of the second relay are both connected to one end of two adjacent motors in the motor module.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the M relays include a first relay and a plurality of second relays, the first relay is used to control a driving direction of a motor in the motor module, and the first relay includes two control terminals, which are respectively connected to a power supply and a ground; the second relay is connected between the first relay and the motor module and used for controlling the driving of the motor in the motor module, each second relay comprises a first control end and a second control end, and the first control end or the second control end is connected with two different motors in the motor module at the same time.

Compared with the prior art, the embodiment of the application has the following beneficial effects:

in the embodiment of the application, the motor driving circuit comprises a relay module and a motor module, wherein the relay module comprises M relays, the motor module comprises N motors, and M is more than or equal to 3 and is less than N; one end of the relay module is connected with a power supply, and the other end of the relay module is grounded; and the relay module is used for controlling the driving and reversing of the motor in the motor module. By implementing the motor driving circuit, the number of relays of the motor driving circuit is reduced, fewer relays are used for controlling more motors, the cost is reduced, the occupied space of the driving circuit is reduced, the weight of a vehicle is reduced, and the improvement on the fuel economy of the vehicle is facilitated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1a is a schematic diagram of a motor driving principle disclosed in an embodiment of the present application;

FIG. 1b is a schematic view of another motor drive principle disclosed in the embodiments of the present application;

FIG. 1c is a schematic diagram of a motor drive circuit disclosed in an embodiment of the present application;

FIG. 2 is a schematic diagram of a motor drive circuit disclosed in an embodiment of the present application;

FIG. 3 is a schematic diagram of another motor drive circuit disclosed in an embodiment of the present application;

FIG. 4 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 5 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 6 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 7 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 8 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 9 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

FIG. 10 is a schematic diagram of yet another motor drive circuit disclosed in an embodiment of the present application;

fig. 11 is a structural diagram of a second relay.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first" and "second" and the like in the description and claims of the present application are used for distinguishing different objects, and are not used for describing a specific order. The terms "comprises," "comprising," and "having," and any variations thereof, of the embodiments of the present application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The "connection" in the specification and claims of the present application is an electrical connection, and the relay in the embodiment of the present application includes one or both of a single cell relay and a twin cell relay, which is not limited herein. It should be noted that, if the motor disclosed in the embodiment of the present application is a seat motor, the working condition may be: the working voltage is 9V and 16V; the locked rotor current 25A.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The following description will be made of the driving principle of the motor that is currently common, taking the relay 10 as an example: combine fig. 1a and 1 b. As shown in fig. 1a, the relay 10 and the motor 20 are included, wherein the relay 10 includes a first control terminal 101, a second control terminal 102, a first terminal 103, a second terminal 104, a third terminal 105 and a fourth terminal 106, wherein the first terminal 103 and the third terminal 105 are connected to a power supply, the second terminal 104 and the fourth terminal 106 are both grounded, the first control terminal 101 is connected to the first terminal 103 and one end of the motor 20, and the second control terminal 102 is connected to the fourth terminal 106 and the other end of the motor 20. At this time, a potential difference is generated between the first terminal 103 and the fourth terminal 106, the direction of the current is marked in fig. 1a in the form of an arrow, and the relay 10 is used to control the motor 20 to operate in the first direction. Referring to fig. 1b, how the relay 10 controls the motor 20 to operate in a second direction opposite to the first direction, fig. 1b is a schematic diagram of a motor driving. In fig. 1b, the first control terminal 101 is connected to the second terminal 104 and one terminal of the motor 20, and the second control terminal 102 is connected to the third terminal 105 and the other terminal of the motor 20. At this time, a potential difference is generated between the second terminal 104 and the third terminal 105, the direction of the current is marked in fig. 1b in the form of an arrow, and the relay 10 is used to control the motor 20 to operate in the second direction. Based on the motor driving principle of fig. 1a and 1b, the number of motors in the motor driving circuit is the same as the number of relays, and a motor driving circuit of a conventional design is described below by taking 6 motors as an example. Referring to fig. 1c, the motor driving circuit diagram shown in fig. 1c includes 6 motors and 6 relays, each relay is connected to ground and power and to one motor.

In order to reduce the number of relays, the embodiment of the application adopts one relay to control the reversing (or driving) of all the motors, and the other relays to control the driving (or reversing) of the corresponding motors. The following description is made with reference to the accompanying drawings. Note that, the motors in fig. 2 to 10 are all denoted by 1211.

Referring to fig. 2, fig. 1 is a motor driving circuit according to an embodiment of the present disclosure. The method comprises the following steps: the relay module 11 comprises M relays, the motor module 12 comprises N motors, and M is more than or equal to 3 and is less than N; one end of the relay module 11 is connected with a power supply, and the other end of the relay module 11 is grounded; and the relay module 11 is used for controlling the motor driving and reversing in the motor module 12.

Optionally, referring to fig. 3, the relay module 11 may include one first relay 111 and M-1 second relays 112, and the motor module 12 includes M-1 sets of motor sub-modules 121; the first relay 111 is connected with a power supply and the ground, the first relay 111 is used for controlling the motor driving direction of each group of motor sub-modules 121, the second relay 112 is connected between the first relay 111 and the motor sub-modules 121, a loop formed by the first relay 111 and the motor sub-modules 121 is connected or disconnected, and the motor driving or the driving stopping of the motor sub-modules 121 is controlled. When the second relay 112 connects the first relay 111 and the motor submodule 121, the second relay 112 controls the driving of the motor in the motor submodule 121 connected thereto. When the second relay 112 disconnects the first relay 111 and/or the motor submodule 121, the second relay 112 controls the motor in the motor submodule 121 connected with the second relay to stop driving.

Alternatively, referring to fig. 4, the first relay 111 may include a first control terminal 1111 and a second control terminal 1112, which are respectively connected to a power source and a ground, each of the second relays 112 includes a third control terminal 1123 and a fourth control terminal 1124, the third control terminal 1123 is connected to the first control terminal 1111, the third control terminal 1123 is connected to one end of one of the motors 1211 in the motor submodule 121, the fourth control terminal 1124 is connected to the second control terminal 1112, the fourth control terminal 1124 is connected to the other end of the motor to which the third control terminal 1123 is connected, and the fourth control terminal 1124 is connected to or disconnected from the second control terminal 1112, so as to control the driving or stopping of the motor submodule.

Optionally, referring to fig. 5, the first relay 111 includes a first terminal 1113 and a third terminal 1115 connected to a power supply, a second terminal 1114 and a fourth terminal 1116 connected to a ground, a first control terminal 1111 is connected to the first terminal 1113 or the second terminal 1114, a second control terminal 1112 is connected to the third terminal 1115 or the fourth terminal 1116, a third control terminal 1123 is connected to the first control terminal 1111, and a fourth control terminal 1124 is connected to or disconnected from the second control terminal 1112. When the motor driving circuit controls the motor to operate in the first direction, the first control terminal 1111 of the motor driving circuit is connected to the second terminal 1114, and the second control terminal 1112 is connected to the third terminal 1115. When the motor driving circuit controls the motor to operate in the second direction, the first control terminal 1111 of the motor driving circuit is connected to the first terminal 1113, and the second control terminal 1112 of the motor driving circuit is connected to the fourth terminal 116. The second relay 112 needs to drive one of the motors in the motor sub-modules, and a potential difference needs to be generated between two ends of the motor, that is, when any one of the third control terminal 1123 and the fourth control terminal 1124 is connected to the power supply, the other one needs to be grounded, the first control terminal 1111 is connected to the power supply, the second control terminal 1112 shown in fig. 5 is connected to the ground, the third control terminal 1123 is connected to the first control terminal 1111 to achieve connection with the power supply, and the fourth control terminal 1124 is connected to the second control terminal 1112 to achieve connection with the ground, so that the corresponding motor can be driven to operate. If the fourth control terminal 1124 is connected to the first control terminal 1111, the third control terminal 1123 and the fourth control terminal 1124 are both connected to the power source at the same time, so that the potential difference cannot be realized, and the corresponding motor cannot be driven, that is, the motor is not driven at this time. It is understood that in some embodiments, the fourth control terminal 1124 can be optionally idle to stop the motor from driving. That is, the fourth control terminal 1124 can be connected to the second control terminal 1112 to realize the driving of the corresponding motor, and is not connected to the second control terminal 1112 to stop driving the corresponding motor. It should be noted that, in the embodiment of the present application, the number of the motors in each motor submodule is at least two. With reference to fig. 5, each second relay can only control one motor in the motor sub-modules to drive at a time, so the motors in the same sub-module may include a common motor and an unusual motor, the common motor is a motor with a relatively high frequency of use, the unusual motor is a motor with a relatively low frequency of use, for example, the common motor may be a motor for driving a steering wheel of an automobile, and the unusual motor may be a motor for driving a horizontal position of a driving seat.

In some embodiments, the number of motors in each motor submodule is two, and the motor driving circuit is described below by taking 3 second relays as an example, in conjunction with fig. 6, each motor submodule 121 in fig. 6 includes a first motor 1211 and a second motor 1211, the second relay 112 further includes a sixth terminal 1126 connected to the first terminal of the first motor 1211, a fifth terminal 1125 connected to the first terminal of the second motor 1211, a third control terminal 1123 connected to the fifth terminal 1125 or the sixth terminal 1126, the second relay 112 further includes a seventh terminal 1127 connected to the second control terminal 1112 and an eighth terminal 1128 connected to the first control terminal 1111, and the fourth control terminal 1124 connected to the seventh terminal 1127 or the eighth terminal 1128. Fig. 6 shows a case where the third control terminal 1123 is connected to the fifth terminal 1125, in which case the second relay 112 controls the driving of the second motor 1211, and in a case where the third control terminal 1123 is connected to the sixth terminal 1126 (not shown), the second relay 112 controls the driving of the first motor 1211.

Optionally, the relay module 11 includes a first relay 111 and a plurality of second relays 112, where the first relay 111 is configured to control on/off of the motor module 12 and a power supply, the second relays 112 are all grounded and connected between the motor module 12 and the first relay 111, and are configured to control a driving direction of a motor 1211 in the motor module 12, each of the second relays 112 includes a first control end 1121 and a second control end 1122, the first control end 1121 and the second control end 1122 are both connected to the power supply or the ground, and the first control end 1121 or the second control end 1122 is connected to two different motors 1211. It should be noted that, the first control end or the second control end of the second relay can be grounded or powered. When the first control end and the second control end of the second relay are both connected with a power supply or the ground, the driving of the motor is stopped; the first control end of the second relay is connected with the power supply, the second control end of the second relay is connected with the ground, or the first control end of the second relay is connected with the ground, and the second control end of the second relay is connected with the power supply to control the motor to drive.

The following is illustrated in two cases:

the number of the motors is even number, and the even number of the motors are sequentially connected in series:

the first method comprises the following steps: the motor driving circuit further comprises a third relay, wherein the first control end of one of the second relays is connected with one end of the first motor arranged at the head position, the second control end is connected with the other end of the first motor at the same time, one end of the motor adjacent to the first motor is connected with one end of the other motor in the first relay, the first control end and the second control end of the rest of the second relays are connected with one ends of the two adjacent motors in the motor module at the same time, the third relay comprises a control end, and the control end of the third relay is connected with one end of the motor arranged at the tail position and is connected with a power supply or the ground. For example, referring to fig. 7, the motor driving circuit shown in fig. 7 includes 6 motors, 3 second relays 112, a first relay 111 and a first third relay 113, where the 6 motors are sequentially connected in series, the first relay 111 is connected to a power supply, the first control terminal 1121 of each second relay 112 is grounded, the second control terminal 1122 of each second relay 112 is connected to the power supply, and the third relay 113 is connected to the power supply or the ground. As shown in the figure, the 6 motors may include a first motor, a second motor, a third motor, a fourth motor, a fifth motor and a sixth motor in order from top to bottom, and the second relay 112 may include a first second relay, a second relay and a third second relay. First control terminal 1121 of first and second relays 112 is connected to one end of a first motor, second control terminal 1122 of first and second relays 112 is connected to the other end of the first motor and to one end of a second motor, first control terminal 1121 of second relay 112 is connected to the other end of the second motor and to one end of a third motor, second control terminal 1122 of second relay 112 is connected to the other end of the third motor and to one end of a fourth motor, first control terminal 1121 of third relay 112 is connected to the other end of the fourth motor and to one end of a fifth motor, second control terminal 1122 of third relay 112 is connected to the other end of the fifth motor and to one end of a sixth motor, and the other end of the sixth motor is connected to third relay 113.

And the second method comprises the following steps: the motor arranged at the tail end and the motor arranged at the head are connected to form a loop, the first control end of each second relay is connected with one end of two adjacent motors in the motor module, and the second control end of each second relay is simultaneously connected with one end of two adjacent motors in the motor module. Illustratively, referring to fig. 8, the motor driving circuit shown in fig. 8 includes 6 motors and 3 second relays 112, wherein one first relay 111 and 6 motors are sequentially connected in series, the first relay 111 is connected to a power supply, the first control terminal 1121 of each second relay 112 is grounded, and the second control terminal 1122 of each second relay 112 is connected to the power supply. As shown in the figure, the 6 motors may include a first motor, a second motor, a third motor, a fourth motor, a fifth motor and a sixth motor in order from top to bottom, and the second relay 112 may include a first second relay, a second relay and a third second relay. First control terminal 1121 of first second relay 112 is connected to one end of a first motor and to the other end of a sixth motor, second control terminal 1122 of first second relay 112 is connected to the other end of the first motor and to one end of the second motor, first control terminal 1121 of second relay 112 is connected to the other end of the second motor and to one end of the third motor, second control terminal 1122 of second relay 112 is connected to the other end of the third motor and to one end of the fourth motor, first control terminal 1121 of third second relay 112 is connected to the other end of the fourth motor and to one end of the fifth motor, and second control terminal 1122 of third second relay 112 is connected to the other end of the fifth motor and to one end of the sixth motor.

The number of motors is odd, and the condition that odd number motors concatenate in proper order: the first control end of one second relay is connected with one end of the first motor arranged at the head, the second control end is simultaneously connected with the other end of the first motor and one end of the motor adjacent to the first motor, and the first control ends and the second control ends of other second relays are simultaneously connected with one ends of two adjacent motors in the motor module. For example, referring to fig. 9, the motor driving circuit shown in fig. 9 includes 5 motors and 3 second relays 112, wherein the 5 motors are connected in series, the first relay 111 is connected to a power source, the first control terminal 1121 of each second relay 112 is connected to ground, and the second control terminal 1122 of each second relay 112 is connected to the power source. As shown in the figure, the 5 motors may include a first motor, a second motor, a third motor, a fourth motor, and a fifth motor in order from top to bottom, and the second relay 112 may include a first second relay, a second relay, and a third second relay. First control terminal 1121 of first second relay 112 is connected to one end of a first motor, second control terminal 1122 of first second relay 112 is connected to the other end of the first motor and to one end of a second motor, first control terminal 1121 of second relay 112 is connected to the other end of the second motor and to one end of a third motor, second control terminal 1122 of second relay 112 is connected to the other end of the third motor and to one end of a fourth motor, first control terminal 1121 of third second relay 112 is connected to the other end of the fourth motor and to one end of the fifth motor, and second control terminal 1122 of third second relay 112 is connected to the other end of the fifth motor.

It is understood that in the motor driving circuit shown in fig. 7-9, the first control terminal 1121 of the second relay 112 can be further connected to a power source, the second control terminal 1122 can be further connected to a ground, and both the first control terminal 1121 and the second relay 112 can be further connected to the power source and the ground, so that the connection of the first control terminal 1121 and the second control terminal 1122 can be adjusted to realize the reversing of the motor and the interruption of the driving. For simplicity and objectivity of the drawing, the connection situation in which the first control terminal 1121 and the second control terminal 1122 are connected or disconnected to achieve the interrupt driving is not shown.

Optionally, the M relays include a first relay and a plurality of second relays, the first relay is used for controlling a motor driving direction in the motor module, and the first relay includes two control ends, which are respectively connected to the power supply and the ground; the second relays are connected between the first relays and the motor module and used for controlling the driving of the motor in the motor module, each second relay comprises a first control end and a second control end, and the first control end or the second control end is connected with two different motors in the motor module.

It should be noted that both the first control end and the second control end of the second relay can be connected to the first control end or the second control end of the first relay. When the first control end and the second control end of the second relay are both connected with the first control end of the first relay or the second control end of the first relay, the driving of the motor is stopped; the first control end of the second relay is connected with the first control end of the first relay, the second control end of the second relay is connected with the second control end of the first relay, or the first control end of the second relay is connected with the second control end of the first relay, and the second control end of the second relay is connected with the first control end of the first relay to control the motor to drive.

For example, referring to fig. 10, the first relay 111 shown in fig. 10 is connected to a power supply, the first control ends 1121 of the second relays 112 are connected to the first control ends 1111, the second control ends 1122 are connected to the second control ends 1112, the first control end 1121 of the first second relay is connected to one end of the first motor arranged at the head, the second control end 1122 is simultaneously connected to the other end of the first motor and one end of the motor adjacent to the first motor, and the first control ends 1121 and the second control ends 1122 of the other second relays 112 are simultaneously connected to one ends of two adjacent motors in the motor module. It is understood that first control terminal 1121 of second relay 112 can be selectively connected to second control terminal 1112, and second control terminal 1122 of second relay 112 can be selectively connected to first control terminal 1111, that is, if first control terminal 1121 and second control terminal 1122 of second relay 112 are simultaneously connected to first control terminals 1111 or 1112, the driving is interrupted. For simplicity and objectivity of the drawing, the connection situation in which the first control terminal 1121 and the second control terminal 1122 are connected or disconnected to achieve the interrupt driving is not shown. In addition, fig. 10 shows that the number of motors in the motor driving circuit is odd, which is not shown in the embodiment of the present application for the case that the number of motors is even, and refer to fig. 7 to 8 specifically, which is not described herein again.

It should be noted that the second relay in fig. 10 further includes a first end, a second end, a third end, and a fourth end, where the first control end of the second relay is connected to any one of the first end and the second end, and the second control end of the second relay is connected to any one of the third end and the fourth end, so that both the first control end and the second control end of the second relay can be connected to the first control end or the second control end of the first relay. The following description will be made by taking a second relay as an example with reference to fig. 11: in fig. 11, the first control terminal 1121 of the second relay 112 is connected to the second terminal 1123, and the second control terminal 1122 of the second relay 112 is connected to the third terminal 1125.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.