阅读说明：本技术 一种升压电路电机系统及其控制方法 (Booster circuit motor system and control method thereof ) 是由 林峭 李春莲 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种升压电路电机系统及其控制方法,包括直流电机、BOOST升压电路和检测控制电路；通过设置有BOOST升压电路和检测控制电路,检测控制电路根据直流电机的电压信号、电流信号和转速信号,输出PWM调控信号改变BOOST升压电路的开关管的通断时间,实现电源输出端的电压调控,能够适用于恒速度、恒扭力、恒功率的工作场合,适用性强；而且控制电路板一体设置在电机底座中,使得整个电机系统更加紧凑,电机体积小。(The invention discloses a booster circuit motor system and a control method thereof, wherein the booster circuit motor system comprises a direct current motor, a BOOST booster circuit and a detection control circuit; the BOOST booster circuit and the detection control circuit are arranged, the detection control circuit outputs a PWM (pulse-width modulation) regulation and control signal according to a voltage signal, a current signal and a rotating speed signal of the direct-current motor to change the on-off time of a switching tube of the BOOST booster circuit, so that the voltage regulation and control of the output end of a power supply are realized, the BOOST booster circuit can be suitable for working occasions with constant speed, constant torsion and constant power, and the applicability is strong; and the control circuit board is integrally arranged in the motor base, so that the whole motor system is more compact and the motor is small in size.)

1. A BOOST circuit motor system is characterized by comprising a direct current motor, a power input end, a BOOST BOOST circuit, a detection control circuit and a power output end for supplying power to the direct current motor, wherein the BOOST BOOST circuit comprises an energy storage inductor, a diode and a switch tube, the power input end is connected with one end of the energy storage inductor, the other end of the energy storage inductor is connected with a switch pin of the switch tube and the anode of the diode, the other switch pin of the switch tube is grounded, the cathode of the diode is connected with the power output end, the power output end is connected with the direct current motor, the power output end is also connected with a voltage detection end of the detection control circuit, the direct current motor is provided with a current detection unit and a rotating speed detection unit, the current detection unit is connected with the current detection end of the detection control circuit, the rotating speed detection unit is connected with a rotating speed detection end of the detection control circuit, and a PWM (pulse-width modulation) regulation signal output end of the detection control circuit is connected with a control end of the switch tube so as to control the on-off of the switch tube.

2. A BOOST circuit motor system according to claim 1, further comprising a motor base, wherein the dc motor is disposed on an upper portion of the motor base, a control circuit board is disposed on a lower portion of the motor base, and the power input terminal, the BOOST circuit, the detection control circuit, and the power output terminal are disposed on the control circuit board.

3. A BOOST circuit motor system according to claim 1, wherein said diode, switching tube and detection control circuit are replaced by a BOOST IC.

4. A boost circuit motor system according to claim 1, wherein the dc motor further comprises a front end cover, a stator assembly and a rotor assembly located between the front end cover and the dc motor base, a lower bearing seat is provided in the middle of the dc motor base, an upper bearing seat is provided in the middle of the front end cover, and a rotating shaft of the rotor assembly is mounted on the upper bearing seat and the lower bearing seat through an upper bearing and a lower bearing, respectively.

5. A booster circuit motor system as claimed in claim 4, wherein the front end cap and/or the DC motor base is provided with mounting portions, and the mounting portions are provided with mounting holes.

6. The utility model provides a BOOST circuit motor system, its characterized in that, include direct current motor, power input end, BOOST BOOST circuit, detection control circuit and give the power output end of direct current motor power supply, BOOST BOOST circuit includes energy storage inductance, diode and switch tube, power input end connects the one end of energy storage inductance, the other end of energy storage inductance is connected a switch pin of switch tube with the positive pole of diode, another switch pin ground connection of switch tube, the negative pole of diode is connected power output end, power output end connects direct current motor, power output end still inserts detection control circuit's voltage detection end, direct current motor is provided with current detection unit, current detection unit connects detection control circuit's current detection end, detection control circuit's PWM regulation and control signal output part connects the control end of switch tube is with control the control of switch tube And (5) switching on and off.

7. The utility model provides a BOOST circuit motor system, its characterized in that, include direct current motor, power input end, BOOST BOOST circuit, detection control circuit and give the power output end of direct current motor power supply, BOOST BOOST circuit includes energy storage inductance, diode and switch tube, power input end connects the one end of energy storage inductance, the other end of energy storage inductance is connected a switch pin of switch tube with the positive pole of diode, another switch pin ground connection of switch tube, the negative pole of diode is connected power output end, power output end connects direct current motor, power output end still inserts detection control circuit's voltage detection end, direct current motor is provided with rotational speed detecting element, rotational speed detecting element connects detection control circuit's rotational speed detection end, detection control circuit's PWM regulation and control signal output end connects the control end of switch tube is with control the control of switch tube And (5) switching on and off.

8. A control method applied to a booster circuit motor system according to any one of claims 1 to 5, characterized by comprising the steps of:

calculating the duty ratio of the PWM regulation and control signal output end according to the load set voltage reference value and the current reference value;

if the voltage of the power supply input end is increased to cause the voltage of the power supply output end to be also increased, the duty ratio of the PWM regulation and control signal output end is reduced according to the voltage value of the power supply output end detected by the voltage detection end until the voltage value of the power supply output end is reduced to a voltage reference value;

if the voltage of the power supply input end is reduced to cause that the voltage of the power supply output end is also reduced, the duty ratio of the PWM regulation and control signal output end is increased according to the voltage value of the power supply output end detected by the voltage detection end until the voltage value of the power supply output end is increased to a voltage reference value;

if the system load is increased, the working current value of the direct current motor is also increased, the working current of the direct current motor is detected through the current detection end, the duty ratio of the PWM regulation signal output end is reduced, and the voltage value of the power supply output end is reduced until the product of the working current of the direct current motor and the voltage value of the power supply output end is equal to the product of the voltage reference value and the current reference value;

if the system load is smaller, the working current value of the direct current motor is also reduced, the working current of the direct current motor is detected through the current detection end, the duty ratio of the PWM regulation signal output end is increased, and the voltage value of the power supply output end is increased until the product of the working current of the direct current motor and the voltage value of the power supply output end is equal to the product of the voltage reference value and the current reference value.

9. A constant rotation speed control method applied to a booster circuit motor system according to any one of claims 1 to 5, comprising the steps of:

calculating the duty ratio of a PWM (pulse-width modulation) regulation signal output end according to a load set rotating speed reference value;

if the voltage of the power supply input end is increased to cause the voltage of the power supply output end to be also increased, the actual rotating speed of the direct current motor is detected through the rotating speed detection end, the duty ratio of the PWM regulation and control signal output end is reduced, and the voltage value of the power supply output end is reduced until the actual rotating speed of the direct current motor is reduced to a rotating speed reference value;

if the actual rotating speed of the direct current motor is reduced due to the increase of the load, the actual rotating speed of the direct current motor is detected through the rotating speed detection end, the duty ratio of the PWM regulation and control signal output end is increased, and the voltage value of the power supply output end is increased until the actual rotating speed of the direct current motor is increased to the rotating speed reference value.

10. A constant voltage control method applied to a booster circuit motor system according to any one of claims 1 to 7, comprising the steps of:

setting a voltage reference value according to the working voltage grade of the direct current motor, and calculating the duty ratio of the PWM regulation and control signal output end;

if the voltage of the power output end drops, the duty ratio of the PWM regulation signal output end is increased according to the voltage value of the power output end detected by the voltage detection end until the voltage value of the power output end is increased to the voltage reference value.

Technical Field

The invention relates to the field of motors, in particular to a booster circuit motor system and a control method thereof.

Background

The DC motor has excellent speed regulating performance and starting performance, and may be used widely in different industries. However, the system has significant disadvantages, and particularly, on some special occasions, such as the states of constant speed, constant torque force, constant power operation and the like, the direct current permanent magnet brush motor and the series excited motor applied by direct current cannot be realized, although the brushless permanent magnet motor and the switched reluctance motor system can realize the working conditions, the system cannot normally work or even work under the conditions of unstable power grid and extremely low voltage (such as single battery condition), and the defects greatly limit the use of the direct current motor.

Disclosure of Invention

The invention aims to solve at least one of the technical problems in the prior art, and provides a booster circuit motor system and a control method thereof, which can be suitable for working occasions with constant speed, constant torque and constant power and have strong applicability.

The invention provides a BOOST circuit motor system, which comprises a direct current motor, a power input end, a BOOST circuit, a detection control circuit and a power output end for supplying power to the direct current motor, wherein the BOOST circuit comprises an energy storage inductor, a diode and a switch tube, the power input end is connected with one end of the energy storage inductor, the other end of the energy storage inductor is connected with one switch pin of the switch tube and the anode of the diode, the other switch pin of the switch tube is grounded, the cathode of the diode is connected with the power output end, the power output end is connected with the direct current motor, the power output end is also connected with the voltage detection end of the detection control circuit, a current detection unit and a rotating speed detection unit are arranged in the direct current motor, the current detection unit is connected with the current detection end of the detection control circuit, the rotating speed detection unit is connected with a rotating speed detection end of the detection control circuit, and a PWM (pulse-width modulation) regulation signal output end of the detection control circuit is connected with a control end of the switch tube so as to control the on-off of the switch tube.

The booster circuit motor system at least has the following beneficial effects: through being provided with BOOST BOOST circuit and detection control circuit, detection control circuit is according to direct current motor's voltage signal, current signal and rotational speed signal, and output PWM regulates and control the signal and change the break-make time of BOOST BOOST circuit's switch tube, realizes the voltage regulation and control of power output end, can be applicable to the work occasion of constant speed, constant torsion, constant power, and the suitability is strong.

The BOOST circuit motor system according to the first aspect of the present invention further includes a motor base, the dc motor is disposed on the upper portion of the motor base, the lower portion of the motor base is provided with a control circuit board, and the power input terminal, the BOOST circuit, the detection control circuit, and the power output terminal are disposed on the control circuit board. The control circuit board is integrally arranged in the motor base, so that the whole motor system is more compact, and the motor is small in size.

According to the BOOST circuit motor system of the first aspect of the invention, the diode, the switching tube and the detection control circuit are replaced by a BOOST IC. The special BOOST IC is adopted to replace a diode, a switch tube and a detection control circuit, so that the circuit integration level is higher, and the working reliability of the circuit is higher.

According to the boost circuit motor system of the first aspect of the present invention, the detection control circuit is an MCU chip, a DSP chip or a digital circuit integrated chip.

According to the boost circuit motor system of the first aspect of the present invention, the dc motor is a dc brush motor or a dc brushless motor.

According to the boost circuit motor system in the first aspect of the present invention, the dc motor further includes a front end cover, and a stator assembly and a rotor assembly located between the front end cover and the dc motor base, wherein a lower bearing seat is disposed in the middle of the dc motor base, an upper bearing seat is disposed in the middle of the front end cover, and a rotating shaft of the rotor assembly is mounted on the upper bearing seat and the lower bearing seat through an upper bearing and a lower bearing, respectively.

According to the booster circuit motor system in the first aspect of the present invention, the front end cover and/or the dc motor base is provided with a mounting portion, and the mounting portion is provided with a mounting hole.

In a second aspect of the present invention, a BOOST circuit motor system is provided, which includes a dc motor, a power input terminal, a BOOST circuit, a detection control circuit, and a power output terminal for supplying power to the dc motor, where the BOOST circuit includes an energy storage inductor, a diode, and a switching tube, the power input terminal is connected to one end of the energy storage inductor, the other end of the energy storage inductor is connected to one switching pin of the switching tube and an anode of the diode, another switching pin of the switching tube is grounded, a cathode of the diode is connected to the power output terminal, the power output terminal is connected to the dc motor, the power output terminal is further connected to a voltage detection terminal of the detection control circuit, the dc motor is provided with a current detection unit, the current detection unit is connected to a current detection terminal of the detection control circuit, and a PWM control signal output terminal of the detection control circuit is connected to a control terminal of the switching tube to control the switching on/off of the dc motor Closing the tube.

The BOOST circuit motor system comprises a direct current motor, a power input end, a BOOST circuit, a detection control circuit and a power output end for supplying power to the direct current motor, wherein the BOOST circuit comprises an energy storage inductor, a diode and a switch tube, the power input end is connected with one end of the energy storage inductor, the other end of the energy storage inductor is connected with one switch pin of the switch tube and the anode of the diode, the other switch pin of the switch tube is grounded, the cathode of the diode is connected with the power output end, the power output end is connected with the direct current motor, the power output end is also connected with a voltage detection end of the detection control circuit, the direct current motor is provided with a rotating speed detection unit, the rotating speed detection unit is connected with a rotating speed detection end of the detection control circuit, and a PWM (pulse width modulation) signal output end of the detection control circuit is connected with the control end of the switch tube to control the opening of the direct current motor Closing the tube.

In a fourth aspect of the present invention, there is provided a constant torque or constant power control method applied to the boost circuit motor system in the first aspect and the second aspect, including the steps of:

setting a voltage reference value and a current reference value according to the actual load condition, and calculating the duty ratio of the output end of the PWM regulation and control signal;

if the voltage of the power supply input end is increased to cause the voltage of the power supply output end to be also increased, the power and the output torque of the system are also increased at the moment, the voltage of the power supply output end is monitored through the detection control circuit, the duty ratio of the PWM regulation and control signal output end is reduced according to the voltage value of the power supply output end detected by the voltage detection end until the voltage value of the power supply output end is reduced to the voltage reference value; thereby realizing the constant torque or constant power work of the motor system;

similarly, if the voltage of the power supply input end is reduced to cause the voltage of the power supply output end to be reduced, the duty ratio of the PWM regulation signal output end is increased according to the voltage value of the power supply output end detected by the voltage detection end until the voltage value of the power supply output end is increased to the voltage reference value;

similarly, if the system load is increased, the working current value of the direct current motor is also increased, the working current of the direct current motor is detected through the current detection end, the duty ratio of the PWM regulation signal output end is reduced, and the voltage value of the power supply output end is reduced until the product of the working current of the direct current motor and the voltage value of the power supply output end is equal to the product of the voltage reference value and the current reference value;

similarly, if the system load is smaller, the working current value of the direct current motor is also reduced, the working current of the direct current motor is detected through the current detection end, the duty ratio of the PWM regulation signal output end is increased, and the voltage value of the power output end is increased until the product of the working current of the direct current motor and the voltage value of the power output end is equal to the product of the voltage reference value and the current reference value.

In a fifth aspect of the present invention, there is provided a constant rotation speed control method applied to the boost circuit motor system according to the first aspect and the third aspect, including the steps of:

setting a rotating speed reference value according to the actual load condition, and calculating the duty ratio of the PWM regulation and control signal output end;

if the voltage of the power supply input end is increased to cause the voltage of the power supply output end to be also increased, the actual rotating speed of the direct current motor is increased at the moment, the actual rotating speed of the direct current motor is detected through the rotating speed detection end, the duty ratio of the PWM regulation and control signal output end is reduced, and the voltage value of the power supply output end is reduced until the actual rotating speed of the direct current motor is reduced to the rotating speed reference value; so as to realize the constant rotating speed work of the motor system;

similarly, if the actual rotating speed of the direct current motor is reduced due to the increase of the load, the actual rotating speed of the direct current motor is detected through the rotating speed detection end, the duty ratio of the PWM regulation and control signal output end is increased, and the voltage value of the power supply output end is increased until the actual rotating speed of the direct current motor is increased to the rotating speed reference value.

In a sixth aspect of the present invention, there is provided a constant voltage control method applied to any one of the above-mentioned boost circuit motor systems, including the steps of:

setting a voltage reference value according to the working voltage grade of the direct current motor, and calculating the duty ratio of the PWM regulation and control signal output end;

if the voltage of the power output end drops, the duty ratio of the PWM regulation signal output end is increased according to the voltage value of the power output end detected by the voltage detection end until the voltage value of the power output end is increased to the voltage reference value.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

fig. 1 is an overall schematic diagram of a boost circuit motor system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a motor system of a boost circuit according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a boost circuit motor system according to an embodiment of the present invention;

fig. 4 is an exploded cross-sectional view of a boost circuit motor system according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a control circuit board of a booster circuit motor system according to an embodiment of the present invention;

fig. 6 is a circuit diagram of a control circuit board of a booster circuit motor system according to another embodiment of the present invention;

fig. 7 is a circuit diagram of a control circuit board of a booster circuit motor system according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.