WO2014000481A1

WO2014000481A1 - Dc brushless motor

Info

Publication number: WO2014000481A1
Application number: PCT/CN2013/073177
Authority: WO
Inventors: 赵勇
Original assignee: 中山大洋电机股份有限公司
Priority date: 2012-06-30
Filing date: 2013-03-26
Publication date: 2014-01-03
Also published as: CN202721643U

Abstract

A DC brushless motor, which comprises a motor body and a motor controller, wherein the motor body consists of a stator assembly, a rotor assembly and a shell. The DC brushless motor is characterized in that the motor controller comprises a control box, a main control panel installed in the control box, and an auxiliary control panel positioned outside the control box and is electrically connected with a main circuit board; and the main control panel and the auxiliary control panel are provided with at least four connection ports which comprises a DC bus voltage port, a DC low-voltage power supply port, a grounding port and a half-duplex asynchronous communication port. The DC brushless motor simplifies the circuit structure of the main control panel, is easy in wiring and electronic component arrangement, and has good heat dissipation and wider application range.

Description

DC brushless motor

Technical field

The utility model relates to a direct current brushless motor.

Background technique

At present, the structure of the DC motor is as shown in Fig. 1, including the motor entity A and the motor controller B. The motor body A includes a stator assembly, a rotor assembly and a casing, and the motor controller B includes a control box and a control installed in the control box. Board C, the control box is installed at the bottom of the casing, and the control board C is integrated with a power supply part, a microprocessor, an IGBT inverter, a motor operating parameter detecting circuit and an interface circuit. Due to the large number of circuit units and complicated structure, the inside of the control box The space is very limited, which brings 4 large difficulties to the layout and heat dissipation of wiring and electronic parts. The electromagnetic interference is also large. Some small-sized DC brushless motors have too little space in the control box to meet the requirements.

Utility model content

The object of the present invention is to provide a DC brushless motor. The motor controller includes a control box, a main control board installed in the control box, and a sub-control board electrically connected to the main circuit board outside the control box, thereby The circuit structure of the control board, wiring and electronic parts layout is easy, heat dissipation is good, and the scope of application is wider.

The technical scheme of the utility model is as follows:

A brushless DC motor includes a motor body and a motor controller, the motor body includes a stator assembly, a rotor assembly and a casing, and the motor controller includes a control box, a main control board installed in the control box, and a main unit outside the control box The auxiliary control board of the circuit board is electrically connected, and at least four connection ports are provided for the main control board and the sub control board, and the four connection ports include a DC bus voltage port, a DC low voltage power supply port, a ground port, and a half duplex asynchronous communication port.

The main control board described above includes a first microprocessor, an IGBT inverter unit, and motor operating parameters a detecting unit and a first single-wire half-duplex asynchronous communication circuit, the motor operating parameter detecting unit sends a signal to the first microprocessor, the first microprocessor outputs a signal to the IGBT inverter unit, and the IGBT inverter unit controls the stator assembly The winding of the winding is energized, the auxiliary control board comprises a second microprocessor, a second single-wire half-duplex asynchronous communication circuit and a power supply part, the power supply part supplies power to each part of the circuit, and the first microprocessor passes the first single-wire half-duplex asynchronous communication The circuit, the second single-wire half-duplex asynchronous communication circuit establishes communication with the second microprocessor.

The sub-control board described above further includes a dial switch group, and the dial switch group inputs setting data to the second microprocessor.

The sub-control board described above is further provided with an input signal interface circuit, and the input signal interface circuit is connected to the input terminal of the second microprocessor.

The power supply part described above comprises an anti-electromagnetic interference filter circuit, a rectification circuit and a second DC/DC step-down circuit, the AC input is connected to the input end of the anti-electromagnetic interference filter circuit, and the output end of the anti-electromagnetic interference filter circuit is connected to the input end of the rectification circuit The output end of the rectifier circuit is connected to the input end of the second DC/DC step-down circuit, the output end of the rectifier circuit obtains the DC bus voltage, and the output end of the second DC/DC buck circuit obtains the DC low voltage.

The main control board described above further includes a first DC/DC step-down circuit, the first DC/DC step-down circuit is connected to the DC low-voltage power supply port, and the first DC/DC step-down circuit output terminal provides a DC low voltage.

The motor operating parameter detecting unit described above includes a Hall element detecting module for detecting the rotor position and the rotational speed.

Compared with the prior art, the utility model has the following advantages: 1) The motor controller comprises a control box, a main control board installed in the control box, and a sub-control board electrically connected to the main circuit board outside the control box, thereby The main control board's circuit structure, reduced size, easy layout of wiring and electronic parts, good heat dissipation, can use a small size DC brushless motor, a wider range of applications; main control board and sub-control The board is provided with at least four connection ports, including DC bus voltage port, DC low voltage power supply port, ground port and half duplex asynchronous communication port, which can make the interface between the main control board and the sub control board become more compact. , the tube circuit. 2) The main control board comprises a first microprocessor, an IGBT inverter unit, a motor operating parameter detecting unit and a first single-wire half-duplex asynchronous communication circuit, and the auxiliary control board comprises a second microprocessor and a second single-wire half-duplex asynchronous The communication circuit and the power supply part, the power supply part supplies power to each part of the circuit, and the first microprocessor establishes communication with the second microprocessor through the first single-wire half-duplex asynchronous communication circuit and the second single-wire half-duplex asynchronous communication circuit, and the circuit is distributed. The structure is reasonable, the power part is placed on the auxiliary control board, further reducing electromagnetic interference and effectively solving the heat dissipation problem; 3) the auxiliary control board further includes a dial switch group, and the dial switch group inputs setting data to the second microprocessor, The second micro-processing controller reads the combined state set by the dial switch group, thereby determining the speed of each gear of the motor, the steering, the running control mode, and the working voltage of the motor, which is very convenient to use; 4) the auxiliary control board is also provided with an input signal interface. a circuit, the input signal interface circuit is connected to the input end of the second microprocessor to facilitate connection with the client system controller; 5) A first microprocessor control board, a second sub-board microprocessor, the microprocessor accomplished according to two different jobs require different, flexible and convenient to use in combination, help to improve the operation speed and efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic structural view of a conventional DC motor;

Figure 2 is a schematic view of the structure of the present invention;

Figure 3 is a view showing the state of use of the present invention;

Figure 4 is a circuit block diagram of the main control board and the sub control board of the present invention;

FIG. 5 is a specific circuit connection diagram of a single-wire half-duplex asynchronous communication circuit.

detailed description:

As shown in Figure 2, a DC brushless motor, including motor body 1 and motor controller, motor The entity comprises a stator assembly, a rotor assembly and a casing, and the motor controller comprises a control box 2, a main control board 3 mounted inside the control box 2, and a sub-control board 6 electrically connected to the main circuit board 3 outside the control box 2, the main The control board 3 and the sub-control board 6 are provided with at least four connection ports including a DC bus voltage port Vdc, a DC voltage supply port Vccl, a ground port GND, and a half-duplex asynchronous communication port R/T. The sub-control board 6 is inserted into the socket 6 through the plug 5 on the lead, and the socket 6 is electrically connected to the main control board 3, so that the main control board 3 is connected to the sub-control board 6.

As shown in Fig. 3 and Fig. 4, in use, the input signal interface circuit on the sub-control board is connected to the user system controller, and the second microprocessor on the sub-control board processes and converts the signal.

As shown in FIG. 4, the main control board includes a first microprocessor, an IGBT inverter unit, a motor operating parameter detecting unit, and a first single-wire half-duplex asynchronous communication circuit, and the motor operating parameter detecting unit sends the signal to the first micro processing. The first microprocessor outputs a signal to the IGBT inverter unit, the IGBT inverter unit controls the winding of the winding on the stator assembly, and the auxiliary control board includes a second microprocessor, a second single-wire half-duplex asynchronous communication circuit, and a power supply. In part, the power supply part supplies power to each part of the circuit, and the first microprocessor establishes communication with the second microprocessor through the first single-wire half-duplex asynchronous communication circuit and the second single-wire half-duplex asynchronous communication circuit, and the secondary control board The utility model further comprises a dial switch group, wherein the dial switch group inputs setting data to the second microprocessor, the auxiliary control board is further provided with an input signal interface circuit, and the input signal interface circuit is connected to the input end of the second microprocessor The power supply part comprises an anti-electromagnetic interference filter circuit, a rectifier circuit and a second DC/DC step-down circuit, and the AC input is connected to the input end of the anti-electromagnetic interference filter circuit, and is resistant to electricity. The output end of the interference filter circuit is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the input end of the second DC/DC buck circuit, and the output end of the rectifier circuit obtains the DC bus voltage Vdc, and the second DC/DC buck circuit The output terminal obtains DC low voltage Vccl, Vcc2, DC low voltage Vccl is 15V, provides driving voltage for IGBT inverter unit, DC low voltage Vcc2 is 5V, powers the microprocessor, and the main control board also includes a first DC/DC step-down circuit. The first DC/DC step-down circuit is connected to the DC low voltage power supply port vccl, The first DC/DC step-down circuit output terminal provides a DC low voltage Vcc2, and the motor operating parameter detecting unit includes a Hall element detecting module for detecting the rotor position and the rotational speed. The first microprocessor and the second microprocessor are a single chip MCU or a digital signal processor DSP.

As shown in FIG. 5, the structure of the first single-wire half-duplex asynchronous communication circuit or the second single-wire half-duplex asynchronous communication circuit of the present invention is as shown in FIG. 1. The single-wire half-duplex asynchronous communication circuit includes a comparator chip IC601, Resistor Rl, resistor R2, resistor R3 and resistor R4, resistor R5, resistor R6, resistor R7 and resistor R8, the fourth pin of the comparator chip IC601 is grounded, the 8th pin is connected to the 15V power supply vccl, the resistor R3, and the resistor R6 are connected in series. The two ends of the comparator chip IC601 are connected between the resistor R3 and the resistor R6, and the third pin and the seventh pin of the comparator chip IC601 are the TXD and RXD connection ports respectively and the microprocessor. The MCU is connected, the resistor R1 and the resistor R5 are connected in series, and the two ends are respectively connected with 15V and ground. The sixth pin of the comparator chip IC601 is connected between the resistor R1 and the resistor R5, and the fifth leg and the first leg of the comparator chip IC601 are connected in parallel. One end of the resistor R8 is connected, and the other end of the resistor R8 is used as an R/T signal output port. The two ends of the resistor R2 are respectively connected with a 15V power supply vccl and a first pin of the comparator chip IC601, and a resistor R4. Vccl 15V power supply terminals are connected and the first comparator IC601 chip pin 3, both ends of the resistor R7 are connected to 15V power vccl and pin 7 of comparator IC601 chip.

The motor controller of the utility model comprises a control box, a main control board installed in the control box, and a sub-control board electrically connected to the main circuit board outside the control box, thereby recombining the circuit structure, wiring and electronic parts of the main control board The layout is easy, the heat dissipation is good, and the scope of application is wider.

Claims

Rights request

1. A brushless DC motor, including a motor entity and a motor controller. The motor entity includes a stator assembly, a rotor assembly and a casing. It is characterized in that: the motor controller includes a control box, a main control board installed inside the control box and The secondary control board is located outside the control box and is electrically connected to the main circuit board. The main control board and the secondary control board are equipped with at least 4 connection ports. These four connection ports include a DC bus voltage port, a DC low-voltage power supply port, a grounding port and a half-double port. Work asynchronous communication port.

2. A brushless DC motor according to claim 1, characterized in that: the main control board includes a first microprocessor, an IGBT inverter unit, a motor operating parameter detection unit and a first single-line half-duplex Asynchronous communication circuit, the motor operating parameter detection unit sends the signal to the first microprocessor, the first microprocessor outputs the signal to the IGBT inverter unit, the IGBT inverter unit controls the energization of the coil winding on the stator assembly, and the sub-control board includes The second microprocessor, the second single-wire half-duplex asynchronous communication circuit and the power supply part. The power supply part supplies power to each part of the circuit. The first microprocessor passes the first single-wire half-duplex asynchronous communication circuit, the second single-wire half-duplex asynchronous communication circuit. The communication circuit establishes communication with the second microprocessor.

3. A brushless DC motor according to claim 2, characterized in that: the sub-control board further includes a DIP switch group, and the DIP switch group inputs setting data to the second microprocessor.

4. A brushless DC motor according to claim 3, characterized in that: the sub-control board is further provided with an input signal interface circuit, and the input signal interface circuit is connected to the input end of the second microprocessor.

5. A brushless DC motor according to claim 2, characterized in that: the power supply part includes an anti-electromagnetic interference filter circuit, a rectifier circuit and a second DC/DC step-down circuit, and the AC input is connected to the input of the anti-electromagnetic interference filter circuit. terminal, the output terminal of the anti-electromagnetic interference filter circuit is connected to the input terminal of the rectifier circuit, the output terminal of the rectifier circuit is connected to the input terminal of the second DC/DC step-down circuit, the output terminal of the rectifier circuit obtains the DC bus voltage, and the second DC/DC step-down circuit The output terminal of the voltage circuit obtains DC low voltage.

6. A brushless DC motor according to claim 5, characterized in that: the main control board further includes a first DC/DC step-down circuit, the first DC/DC step-down circuit is connected to the DC low-voltage power supply port, and the first DC/DC step-down circuit is connected to the DC low-voltage power supply port. A DC/DC step-down circuit output provides DC low voltage.

7. A brushless DC motor according to claim 2, characterized in that: the motor operating parameter detection unit includes a Hall element detection module for detecting the rotor position and rotation speed.