阅读说明：本技术 一种飞鱼电机硬件驱动电路及其驱动方法 (Flying fish motor hardware drive circuit and drive method thereof ) 是由 段纵横 段登勇 于 2021-09-23 设计创作，主要内容包括：本发明涉及一种飞鱼电机硬件驱动电路及其驱动方法,电路包括：二极管、第一晶体管、第二晶体管、第三晶体管、第四晶体管、第五晶体管、第六晶体管、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻；其中第三电阻、第四电阻、第五电阻和第六电阻作为晶体管的基极限流电阻,通过控制输入信号以及6个晶体管的开启和关断,从而实现了对电机的控制过程。本发明不仅能够实现低压驱动,并且散热好、成本低、可靠性高,无需投入大量成本,即可实现驱动电机正反转的功能。(The invention relates to a flying fish motor hardware drive circuit and a drive method thereof, wherein the circuit comprises: the transistor comprises a diode, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor; the third resistor, the fourth resistor, the fifth resistor and the sixth resistor are used as base current limiting resistors of the transistors, and the control process of the motor is realized by controlling the input signals and the on and off of the 6 transistors. The invention can realize low-voltage driving, has good heat dissipation, low cost and high reliability, and can realize the function of driving the motor to rotate positively and negatively without investing a large amount of cost.)

1. A hardware drive circuit for a flying fish motor, comprising:

the transistor comprises a diode, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor;

a first end of the first transistor is connected to a first end of the second transistor, a second end of the first transistor is respectively connected to a second end of the third transistor, a second end of the first resistor and a first end of the motor, a third end of the first transistor is connected to a first end of the sixth transistor, a second end of the second transistor is respectively connected to a second end of the fourth transistor, a second end of the motor and a first end of the diode, and a third end of the second transistor is connected to a first end of the fifth transistor; a first end of the third transistor is connected to a first end of the fourth transistor, a first end of the first resistor and a first end of the second resistor, a third end of the third transistor is connected to a first end of the third resistor, a second end of the second resistor and a second end of the third resistor are both connected to a second end of the fifth transistor, a third end of the fourth transistor is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a second end of the sixth transistor, and a third end of the sixth transistor is connected to a second end of the diode and a first end of the sixth resistor; the third end of the fifth transistor is connected with the first end of the fifth resistor; and the second end of the fifth resistor is connected with the first input end, and the second end of the sixth resistor is connected with the second input end.

2. The flying fish motor hardware drive circuit of claim 1, wherein the third transistor and the fourth transistor are both NPN transistors.

3. The flying fish motor hardware drive circuit of claim 1, wherein the first transistor, the second transistor, the fifth transistor, and the sixth transistor are all PNP transistors.

4. The flying fish motor hardware driving circuit of claim 1, wherein the first terminal of the first transistor and the first terminal of the second transistor are both connected to a supply voltage terminal of a power supply.

5. The flying fish motor hardware driving circuit as claimed in claim 1, wherein the first terminal of the first transistor and the first terminal of the second transistor are both thickened.

6. The flying fish motor hardware driving circuit as claimed in claim 1, wherein the first terminal of the fifth transistor and the first terminal of the sixth transistor are both thickened.

7. The flying fish motor hardware drive circuit of claim 1, wherein the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all field effect transistors.

8. The hardware driving circuit of the flying fish motor as claimed in claim 1, wherein the third terminal of the fourth transistor and the first terminal of the fourth resistor are both connected to ground.

9. A method of driving a hardware drive circuit of a flying fish motor, the method being applied to the hardware drive circuit of a flying fish motor as claimed in any one of claims 1 to 7, the method comprising:

inputting a high level signal at a first input terminal and inputting a low level signal at a second input terminal to turn on the first transistor; when the first transistor is conducted, the sixth transistor and the fourth transistor are conducted; the current passes through the first transistor, the motor and the fourth transistor in sequence from a power supply voltage end of a power supply so as to realize the forward rotation of the motor;

when the fourth transistor is in the dead time, current passes through the first transistor, the motor and the diode, and a low-level signal is input to the second input end, so that the sixth transistor is conducted, and the fourth transistor is conducted through a fourth resistor; after the preset waiting time, the current passes through the first transistor, the motor and the fourth transistor from the power supply voltage end in sequence to realize the forward rotation of the motor.

10. The method of claim 9, further comprising:

inputting a low level signal at a first input terminal and inputting a high level signal at a second input terminal to turn on the second transistor; when the second transistor is conducted, a fifth transistor and a third transistor are conducted, and current passes through the second transistor, the motor and the third transistor from the power supply voltage end in sequence to realize the reverse rotation of the motor;

when the fourth transistor is in the dead time, the current sequentially passes through the second transistor, the motor and the first transistor to realize the reverse rotation of the motor, meanwhile, the fifth transistor is conducted, the third transistor is controlled to be conducted through a third resistor, and after the preset waiting time, the current sequentially passes through the second transistor, the motor and the third transistor from the power supply voltage end to realize the reverse rotation of the motor.

Technical Field

The invention relates to the technical field of electronic circuit design, in particular to a flying fish motor hardware driving circuit and a driving method thereof.

Background

At present, the motor driving scheme of the aircraft such as the general flight control and the like mostly adopts an integrated driving mode, as shown in fig. 1 and fig. 2, L298N is a motor driver receiving high voltage, and both a direct current motor and a stepping motor can drive. A driving chip can simultaneously control two direct current speed reducing motors to do different actions, provides 2 amperes of current within the voltage range of 6V to 46V, and has the functions of overheating self-breaking and feedback detection. IN1-IN4 logic inputs: wherein IN1, IN2 control motor M1; IN3, IN4 control motor M2. For example, IN1 inputs high level 1, IN2 inputs low level 0, Q1 and Q4 are turned on, and the motor M1 rotates forward; IN1 inputs low level 0, IN2 inputs high level 1, and Q2 and Q3 turn on corresponding to the motor M1 reversing.

The circuit shown in fig. 2 is a boost module, where +5v represents the boosted voltage of the 3.7v battery, 3.7v being boosted to 5v as shown. VCC takes a value of 5v according to different values of motor voltage.

In the prior art, an L298N double-H bridge direct current motor driving chip is adopted, and the output levels of motors OUTA and OUTB are changed by changing the input levels of INA and INB, so as to control the forward and reverse rotation of the motor 1. However, there are problems as follows:

1. the input end Vcc has high driving voltage, the battery needs a boosting driving mode, and the battery loss is large. The driving voltage does not need to be boosted.

2. Because the chip is adopted to drive the motor, the chip is integrated, the heat dissipation area is small, the heat generation quantity of the fixed module is large, and the heat dissipation module needs to be additionally arranged.

3. The power consumption of the device is large and the cost is high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a hardware driving circuit of a flying fish motor and a driving method thereof.

In order to achieve the purpose, the invention provides the following scheme:

a flying fish motor hardware drive circuit, comprising:

the transistor comprises a diode, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor;

a first end of the first transistor is connected to a first end of the second transistor, a second end of the first transistor is respectively connected to a second end of the third transistor, a second end of the first resistor and a first end of the motor, a third end of the first transistor is connected to a first end of the sixth transistor, a second end of the second transistor is respectively connected to a second end of the fourth transistor, a second end of the motor and a first end of the diode, and a third end of the second transistor is connected to a first end of the fifth transistor; a first end of the third transistor is connected to a first end of the fourth transistor, a first end of the first resistor and a first end of the second resistor, a third end of the third transistor is connected to a first end of the third resistor, a second end of the second resistor and a second end of the third resistor are both connected to a second end of the fifth transistor, a third end of the fourth transistor is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a second end of the sixth transistor, and a third end of the sixth transistor is connected to a second end of the diode and a first end of the sixth resistor; the third end of the fifth transistor is connected with the first end of the fifth resistor; and the second end of the fifth resistor is connected with the first input end, and the second end of the sixth resistor is connected with the second input end.

Preferably, the third transistor and the fourth transistor are both NPN transistors.

Preferably, the first transistor, the second transistor, the fifth transistor and the sixth transistor are all PNP-type triodes.

Preferably, the first terminal of the first transistor and the first terminal of the second transistor are both connected to a supply voltage terminal of a power supply.

Preferably, the first end of the first transistor and the first end of the second transistor are both thickened.

Preferably, the first end of the fifth transistor and the first end of the sixth transistor are both subjected to thickening processing.

Preferably, the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all field effect transistors.

Preferably, the third terminal of the fourth transistor and the first terminal of the fourth resistor are both connected to a ground terminal.

A driving method of a hardware driving circuit of a flying fish motor is applied to the hardware driving circuit of the flying fish motor, and the method comprises the following steps:

inputting a high level signal at a first input terminal and inputting a low level signal at a second input terminal to turn on the first transistor; when the first transistor is conducted, the sixth transistor and the fourth transistor are conducted; the current passes through the first transistor, the motor and the fourth transistor in sequence from a power supply voltage end of a power supply so as to realize the forward rotation of the motor;

when the fourth transistor is in the dead time, current passes through the first transistor, the motor and the diode, and a low-level signal is input to the second input end, so that the sixth transistor is conducted, and the fourth transistor is conducted through a fourth resistor; after the preset waiting time, the current passes through the first transistor, the motor and the fourth transistor from the power supply voltage end in sequence to realize the forward rotation of the motor.

Preferably, the method further comprises the following steps:

inputting a low level signal at a first input terminal and inputting a high level signal at a second input terminal to turn on the second transistor; when the second transistor is conducted, a fifth transistor and a third transistor are conducted, and current passes through the second transistor, the motor and the third transistor from the power supply voltage end in sequence to realize the reverse rotation of the motor;

when the fourth transistor is in the dead time, the current sequentially passes through the second transistor, the motor and the first transistor to realize the reverse rotation of the motor, meanwhile, the fifth transistor is conducted, the third transistor is controlled to be conducted through a third resistor, and after the preset waiting time, the current sequentially passes through the second transistor, the motor and the third transistor from the power supply voltage end to realize the reverse rotation of the motor.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

the invention provides a flying fish motor hardware drive circuit and a drive method thereof, wherein the circuit comprises: the transistor comprises a diode, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor; a first end of the first transistor is connected to a first end of the second transistor, a second end of the first transistor is respectively connected to a second end of the third transistor, a second end of the first resistor and a first end of the motor, a third end of the first transistor is connected to a first end of the sixth transistor, a second end of the second transistor is respectively connected to a second end of the fourth transistor, a second end of the motor and a first end of the diode, and a third end of the second transistor is connected to a first end of the fifth transistor; a first end of the third transistor is connected to a first end of the fourth transistor, a first end of the first resistor and a first end of the second resistor, a third end of the third transistor is connected to a first end of the third resistor, a second end of the second resistor and a second end of the third resistor are both connected to a second end of the fifth transistor, a third end of the fourth transistor is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a second end of the sixth transistor, and a third end of the sixth transistor is connected to a second end of the diode and a first end of the sixth resistor; the third end of the fifth transistor is connected with the first end of the fifth resistor; and the second end of the fifth resistor is connected with the first input end, and the second end of the sixth resistor is connected with the second input end. The invention can realize low-voltage driving, has good heat dissipation, low cost and high reliability, and can realize the function of driving the motor to rotate positively and negatively without investing a large amount of cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a circuit diagram of a chip according to the prior art;

FIG. 2 is a circuit diagram of a boost module in the prior art;

FIG. 3 is a diagram of the hardware driving circuit of the flying fish motor according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating a current flow in a forward rotation of the motor according to the embodiment of the present invention;

fig. 5 is a schematic view of the current flow when the motor is reversely rotated in the embodiment of the present invention.

Description of the symbols:

q1-first transistor, Q2-second transistor, Q3-third transistor, Q4-fourth transistor, Q5-fifth transistor, Q6-sixth transistor, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, R5-fifth resistor, R6-sixth resistor, M-motor, VCC-supply voltage terminal, D1-diode.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, the inclusion of a list of steps, processes, methods, etc. is not limited to only those steps recited, but may alternatively include additional steps not recited, or may alternatively include additional steps inherent to such processes, methods, articles, or devices.

The invention aims to provide a hardware driving circuit of a flying fish motor and a driving method thereof, which can realize low-voltage driving, have good heat dissipation, low cost and high reliability, and can realize the function of driving the motor to rotate forwards and backwards without investing a large amount of cost.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 3 is a component connection diagram of a hardware driving circuit of a flying fish motor M in an embodiment of the present invention, and as shown in fig. 3, the present invention provides a hardware driving circuit of a flying fish motor M, including: a diode D1, a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6; a first terminal of the first transistor Q1 is connected to a first terminal of the second transistor Q2, a second terminal of the first transistor Q1 is connected to a second terminal of the third transistor Q3, a second terminal of the first resistor R1 and a first terminal of the motor M, respectively, a third terminal of the first transistor Q1 is connected to a first terminal of the sixth transistor Q6, a second terminal of the second transistor Q2 is connected to a second terminal of the fourth transistor Q4, a second terminal of the motor M and a first terminal of the diode D1, respectively, and a third terminal of the second transistor Q2 is connected to a first terminal of the fifth transistor Q5; a first end of the third transistor Q3 is connected to a first end of the fourth transistor Q4, a first end of the first resistor R1, and a first end of the second resistor R2, a third end of the third transistor Q3 is connected to a first end of the third resistor R3, a second end of the second resistor R2 and a second end of the third resistor R3 are both connected to a second end of the fifth transistor Q5, a third end of the fourth transistor Q4 is connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is connected to a second end of the sixth transistor Q6, and a third end of the sixth transistor Q6 is connected to a second end of the diode D1 and a first end of the sixth resistor R6; the third end of the fifth transistor Q5 is connected with the first end of the fifth resistor R5; a second terminal of the fifth resistor R5 is connected to the first input terminal (input 1), and a second terminal of the sixth resistor R6 is connected to the second input terminal (input 2).

In this embodiment, the first terminal of the transistor is an emitter terminal, the second terminal is a collector terminal, and the third terminal is a base terminal.

Specifically, the third transistor Q3 and the fourth transistor Q4 are both NPN transistors.

Preferably, the first transistor Q1, the second transistor Q2, the fifth transistor Q5 and the sixth transistor Q6 are all PNP-type triodes.

Further, the first terminal of the first transistor Q1 and the first terminal of the second transistor Q2 are both connected to a supply voltage terminal VCC of a power supply.

Preferably, the third terminal of the fourth transistor Q4 and the first terminal of the fourth resistor R4 are both connected to ground.

In this embodiment, the fifth transistor Q5 and the sixth transistor Q6 are driven in a front stage, and the first transistor Q1, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 are driven in4 rear stages.

Preferably, the first terminal of the first transistor Q1 and the first terminal of the second transistor Q2 are both thickened.

Considering the problem that the pin lines cannot be thickened in the prior internally integrated chip, the first terminals, i.e., the pin 1 (emitter), of the first transistor Q1 and the second transistor Q2 in the present embodiment are thickened to increase and reduce the loss and heat.

Considering that the pin lines cannot be thickened by the chip internally integrated before, in the design process of the PCB for manufacturing the driving circuit, for the Top layer Top and the Bottom layer Bottom, the current flows out from the pin 1 of the first transistor Q1 and the fifth transistor Q5, and then flows into the GND of the power supply through the whole copper-clad layers of the GND of the Top layer and the Bottom layer, so as to form a loop, and the emitter of the pin 1 of the fifth transistor Q5 and the sixth transistor Q6 is thickened to increase and reduce the loss and heat.

Preferably, the first terminal of the fifth transistor Q5 and the first terminal of the sixth transistor Q6 are both thickened.

Preferably, the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 are all field effect transistors.

The embodiment also provides a driving method of the hardware driving circuit of the flying fish motor, which is applied to the hardware driving circuit of the flying fish motor, and the method comprises the following steps:

inputting a high level signal at a first input terminal and inputting a low level signal at a second input terminal to turn on the first transistor; when the first transistor is conducted, the sixth transistor and the fourth transistor are conducted; the current passes through the first transistor, the motor and the fourth transistor in sequence from a power supply voltage end of a power supply so as to realize the forward rotation of the motor;

when the fourth transistor is in the dead time, current passes through the first transistor, the motor and the diode, and a low-level signal is input to the second input end, so that the sixth transistor is conducted, and the fourth transistor is conducted through a fourth resistor; after the preset waiting time, the current passes through the first transistor, the motor and the fourth transistor from the power supply voltage end in sequence to realize the forward rotation of the motor.

Fig. 4 is a schematic diagram of the current flow when the motor rotates forward in the embodiment of the present invention, as shown in fig. 4, when the input 1 is high, and when the input 2 is low, Q1 is turned on, and further Q6 and Q4 are turned on, and the current flows from VCC through Q1, the motor M, Q4, and then to GND, and finally the motor rotates forward. Because the triode has dead time, when the Q4 is turned off, the Q3 is not necessarily conducted, and in order to prevent the short circuit of the motor from burning away, the redundant energy can be discharged through the ground through the R1 discharge resistor.

Q1 and Q4 can not be conducted at the same time, and further the coreless motor can be enabled to rotate forwards through D1, namely, current passes through Q1, M and D1, meanwhile, input 2 is connected with low level, Q6 is conducted, and Q4 is conducted through an R4 base current limiting resistor. After the system is stabilized, most of the current passes from VCC through Q1, motor M, Q4, and then to GND, causing the motor to rotate in the forward direction.

As can be seen in fig. 4, since R1 is provided, Q4 is not always on when Q3 is off, so R1 is a good energy release loop. From fig. 5, R1 cannot be too large.

Preferably, the method further comprises the following steps:

inputting a low level signal at a first input terminal and inputting a high level signal at a second input terminal to turn on the second transistor; when the second transistor is conducted, a fifth transistor and a third transistor are conducted, and current passes through the second transistor, the motor and the third transistor from the power supply voltage end in sequence to realize the reverse rotation of the motor;

when the fourth transistor is in the dead time, the current sequentially passes through the second transistor, the motor and the first transistor to realize the reverse rotation of the motor, meanwhile, the fifth transistor is conducted, the third transistor is controlled to be conducted through a third resistor, and after the preset waiting time, the current sequentially passes through the second transistor, the motor and the third transistor from the power supply voltage end to realize the reverse rotation of the motor.

Fig. 5 is a schematic diagram of the current flow when the motor is reversely rotated in the embodiment of the present invention, as shown in fig. 5, when the input 1 is low, and when the input 2 is high, Q2 is turned on, and further Q5 and Q3 are turned on, and the current passes from VCC through Q2, the motor M, Q3, and then to GND, and finally the motor is reversely rotated. Because the triode has dead time, when the Q3 is turned off, the Q4 is not necessarily conducted, and in order to prevent the short circuit of the motor from burning away, the redundant energy can be discharged through the ground through the R1 discharge resistor. R3 is the base current limiting resistor of Q3.

When the Q4 is in the dead time, the current passes through the Q2M R1 to enable the motor to rotate reversely, meanwhile, the Q5 is conducted, the Q3 is controlled to be conducted through the R3, and the current passes through the Q2M Q3 to enable the motor to rotate reversely after the system is stabilized.

The driving circuit provided by the invention can be widely applied to driving circuits with small motors, can realize low-voltage driving, has good heat dissipation, low cost and high reliability, and can realize the function of driving the forward and reverse rotation of the motor without investing a large amount of cost.

The invention has the following beneficial effects:

(1) according to the invention, the purpose of controlling the forward and reverse rotation of the motor can be achieved by changing the high and low levels of the input end, so that the convenience of motor control is improved.

(2) The drive circuit in the invention can drive the motor to rotate as long as the voltage drop of the drive circuit is more than 0.6V of the voltage drop of the triode, so that the drive circuit does not need high voltage of 5V, and the hollow cup motor can be driven to rotate by the voltage of 3.7V of the lithium battery.

(3) The driving circuit provided by the invention has the advantages of good heat dissipation, low cost and high reliability: meanwhile, as the components are uniformly arranged, the heat dissipation is good, the cost is reduced, and the reliability of the circuit is further improved.

(4) The driving circuit provided by the invention has low power consumption: because the pressure drop is small, the power consumption of the power amplifier is low, and the power amplifier is driven by a mos tube in the later stage, so that the power consumption is further reduced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The method disclosed by the embodiment corresponds to the device disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the device part for description.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.