Direct current brushless motor drive control circuit

Abstract

The utility model discloses a direct current brushless motor drive control circuit, which relates to the field of motors, and comprises a power supply module used for supplying power to other modules; the single chip microcomputer control module is used for comprehensively controlling the circuit to work; the IPM module is used for converting direct current into alternating current, receiving a control signal of the single chip microcomputer control module and controlling a motor to work; compared with the prior art, the beneficial effects of the utility model are that by detecting the voltage and current of the circuit and feeding back the voltage and current to the single-chip microcomputer control module, a multi-protection mechanism is ingeniously adopted to protect the circuit, thereby avoiding the working overcurrent loss heating of a power tube device or an IPM module, avoiding the certain damage and aging of the power device under the voltage stress, and prolonging the service life of the power tube device or the IPM module. And the loss of a power tube device or an IPM module is reduced, so that the power tube device or the IPM module works in an optimal working range, the service life is prolonged, higher energy efficiency and longer operation time are realized, and the overall efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, concretely is a direct current brushless motor drive control circuit. BACKGROUND

[0002] With the development of the control circuit technology of direct current brushless motor (BLDC), the existing main control mode includes square wave control, sine wave control and vector frequency conversion control (FOC), and the FOC control mode has become the preferred control technology in many application fields due to its obvious advantages, although it needs higher hardware cost and higher controller performance requirement.

[0003] The main structure of the existing drive controller includes a power module, a single-chip microcomputer control module, an inverter circuit module, a motor control module and a current and voltage monitoring module, and with the increasing degree of industrial automation, the trend of equipment miniaturization and intelligentization makes the overall demand for electric control tend to be integrated, algorithm hardware, hardware integration and power device miniaturization.

[0004] For high-power and high-voltage scenes, due to technical limitations, drive integration will face heat and voltage resistance problems, and with the emergence of more efficient semiconductor materials (wide bandgap semiconductors), the overall power consumption of the motor drive controller can be reduced, but the cost is greatly improved. Wide bandgap semiconductors are only commonly used in small power equipment, and based on cost considerations, power motor equipment still uses traditional power semiconductor devices Si (silicon) devices. Therefore, the drive controller in high-power equipment has high power consumption and needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a direct current brushless motor drive control circuit to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A direct current brushless motor drive control circuit comprises:

[0008] A power module is used for power supply for other modules.

[0009] A single-chip microcomputer control module is used for comprehensive control of the circuit.

[0010] An IPM module is used for converting direct current into alternating current, receiving the control signal of the single-chip microcomputer control module and controlling the motor.

[0011] The power module is connected with the single-chip microcomputer control module and the IPM module, and the single-chip microcomputer module is connected with the IPM module.

[0012] As a further scheme of the utility model, the power module comprises:

[0013] An interference suppression circuit is used for suppressing electromagnetic interference through a choke coil;

[0014] A rectification filter circuit is used for rectifying through a rectifier and filtering through a capacitor and an inductor;

[0015] A PFC circuit is used for receiving control of a single-chip microcomputer control module and completing power correction of a motor;

[0016] An auxiliary power supply circuit is used for providing DC power as working power supply of the single-chip microcomputer control module and the IPM module;

[0017] An input AC power is connected to the interference suppression circuit, the interference suppression circuit is connected to the PFC circuit, and the PFC circuit is connected to the auxiliary power supply circuit.

[0018] As a further scheme of the utility model: the PFC circuit includes a diode D1 and a triode Q, the positive pole of the diode D1 is connected to the rectification filter circuit, the collector of the triode Q, the emitter of the triode Q is connected to the ground through a resistor, the collector of the triode Q is connected to the single-chip microcomputer control module, the negative pole of the diode D1 is connected to the auxiliary power supply circuit and the IPM module.

[0019] As a further scheme of the utility model: the DC brushless motor drive control circuit further includes an input current detection module, which is used for detecting the current flowing through the PFC circuit and feeding back to the single-chip microcomputer control module; the input current detection module includes a resistor R3, one end of the resistor R3 is connected to the emitter of the triode Q and the single-chip microcomputer control module, and the other end of the resistor R3 is connected to the ground.

[0020] As a further scheme of the utility model: the DC brushless motor drive control circuit further includes an AC voltage detection module, which is used for detecting the AC power after passing through the interference suppression circuit and feeding back to the single-chip microcomputer control module; the AC voltage detection module includes a diode D2, a diode D3, a resistor R1 and a resistor R2, the positive pole of the diode D2 is connected to one end of the output end of the interference suppression circuit, the positive pole of the diode D3 is connected to the other end of the output end of the interference suppression circuit, the negative pole of the diode D2 is connected to the negative pole of the diode D3 and one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the single-chip microcomputer control module, and the other end of the resistor R2 is connected to the ground.

[0021] As a further scheme of the utility model: the DC brushless motor drive control circuit further includes a DC voltage detection module, which is used for detecting the DC power after passing through the PFC circuit and feeding back to the single-chip microcomputer control module; the DC voltage detection module includes a resistor R4 and a resistor R5, one end of the resistor R4 is connected to the output end of the PFC circuit, the other end of the resistor R4 is connected to one end of the resistor R5 and the single-chip microcomputer control module, and the other end of the resistor R5 is connected to the ground.

[0022] Compared with the prior art, the utility model discloses the voltage, current feedback of detection circuit gives singlechip control module, adopt the protection mechanism of many ingeniously, protect the circuit, avoid the working overcurrent loss heat of power tube device or IPM module, avoid the certain damage aging of power device under voltage stress, overheat loss, reduce the loss of power tube device or IPM module, make it work in the optimum working range, increase the service life, realize higher energy efficiency and longer running time, improve the overall efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a kind of circuit diagram of direct current brushless motor drive control circuit. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to Figure 1 A kind of direct current brushless motor drive control circuit, comprising:

[0026] Power module, for powering other modules;

[0027] Single-chip microcomputer control module, for comprehensive control circuit work;

[0028] IPM module, for converting direct current into alternating current, receiving the control signal of single-chip microcomputer control module, control motor work;

[0029] Power module connects single-chip microcomputer control module, IPM module, single-chip microcomputer module connects IPM module.

[0030] In specific embodiments: please refer to Figure 1 IPM module in Intelligent Power Module (Intelligent Power Module) is, here integration pre-drive and power inverter circuit, receive the control of single-chip microcomputer control module to drive motor M work.Single-chip microcomputer control module includes single-chip microcomputer MCU, comprehensive processing circuit work.

[0031] In the embodiment: please refer to Figure 1 Power module includes:

[0032] Interference suppression circuit, for suppressing electromagnetic interference through choke U1;

[0033] Rectifier filter circuit, for rectifying by rectifier T, filtering by capacitor C1, inductor L1;

[0034] PFC circuit, for receiving control of single-chip microcomputer control module, completing power correction of motor;

[0035] Auxiliary power supply circuit, for providing DC as working power supply of single-chip microcomputer control module, IPM module; can adopt collected voltage stabilizer to complete power supply.

[0036] Input AC power connection interference suppression circuit, interference suppression circuit connection PFC circuit, PFC circuit connection auxiliary power supply circuit.

[0037] In the embodiment: please refer to Figure 1 , PFC circuit includes diode D1, triode Q, positive electrode of diode D1 connection rectifier filter circuit, collector of triode Q, emitter of triode Q is connected to ground through a resistor, collector of triode Q connection single-chip microcomputer control module, negative electrode of diode D1 connection auxiliary power supply circuit, IPM module.

[0038] Conduction state of triode Q is controlled by single-chip microcomputer control module, by changing conduction state of triode Q, changing power output to IPM module of power supply module, completing power correction of motor.

[0039] In the embodiment: please refer to Figure 1 , the DC brushless motor drive control circuit further includes input current detection module, for detecting current flowing through PFC circuit, feedback to single-chip microcomputer control module; input current detection module includes resistance R3, one end of resistance R3 connection emitter of triode Q, single-chip microcomputer control module, the other end of resistance R3 is grounded.

[0040] Resistance value of resistance R3 is determined, the greater the current flowing through, the greater the voltage on resistance R3, voltage on resistance R3 feedback to single-chip microcomputer control module, that is, input current information can be reflected.

[0041] In the embodiment: please refer to Figure 1 , the DC brushless motor drive control circuit further includes AC voltage detection module, for detecting AC power after interference suppression circuit, feedback to single-chip microcomputer control module; AC voltage detection module includes diode D2, diode D3, resistance R1, resistance R2, positive electrode of diode D2 connection one end of output end of interference suppression circuit, positive electrode of diode D3 connection other end of output end of interference suppression circuit, negative electrode of diode D2 connection negative electrode of diode D3, one end of resistance R1, the other end of resistance R1 connection one end of resistance R2, single-chip microcomputer control module, the other end of resistance R2 is grounded.

[0042] The input alternating current is sampled by resistors R1 and R2 and fed back to the single-chip microcomputer control module.

[0043] In the embodiment, refer to Figure 1 The DC voltage detection module comprises a resistor R4 and a resistor R5, one end of the resistor R4 is connected to an output end of the PFC circuit, the other end of the resistor R4 is connected to one end of the resistor R5 and the single-chip microcomputer control module, and the other end of the resistor R5 is grounded.

[0044] The DC current output to the IPM module is sampled by resistors R4 and R5 and fed back to the single-chip microcomputer.

[0045] The current signal output by the IPM module to the motor is fed back to the single-chip microcomputer control module through an output current detection module, and the output current detection module has a working principle similar to that of the input current sampling module.

[0046] The working principle of the utility model is that: the power module is used for power supply for other modules; the single-chip microcomputer control module is used for comprehensive control circuit work; the IPM module is used for the direct current into alternating current, receives the control signal of single-chip microcomputer control module, controls motor work.

[0047] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.

[0048] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A direct current brushless motor drive control circuit, characterized by, The direct-current brushless motor drive control circuit comprises: a power module for supplying power to other modules; a single-chip microcomputer control module for comprehensively controlling the circuit operation; an IPM module for converting direct current into alternating current and receiving control signals from the single-chip microcomputer control module to control the motor operation; the power module is connected to the single-chip microcomputer control module and the IPM module, and the single-chip microcomputer module is connected to the IPM module.

2. The direct current brushless motor drive control circuit of claim 1, wherein, The power module comprises: an interference suppression circuit for suppressing electromagnetic interference through a choke coil; a rectification filter circuit for rectifying through a rectifier and filtering through a capacitor and an inductor; a PFC circuit for receiving control signals from the single-chip microcomputer control module to complete motor power correction; an auxiliary power supply circuit for providing direct current as the working power supply of the single-chip microcomputer control module and the IPM module; the input alternating current is connected to the interference suppression circuit, the interference suppression circuit is connected to the PFC circuit, and the PFC circuit is connected to the auxiliary power supply circuit.

3. The direct current brushless motor drive control circuit of claim 2, wherein, The PFC circuit comprises a diode D1 and a transistor Q, the positive electrode of the diode D1 is connected to the rectification filter circuit, the collector of the transistor Q, the emitter of the transistor Q is connected to the ground through a resistor, the collector of the transistor Q is connected to the single-chip microcomputer control module, and the negative electrode of the diode D1 is connected to the auxiliary power supply circuit and the IPM module.

4. The direct current brushless motor drive control circuit of claim 3, wherein, The direct-current brushless motor drive control circuit further comprises an input current detection module for detecting the current flowing through the PFC circuit and feeding back to the single-chip microcomputer control module; the input current detection module comprises a resistor R3, one end of the resistor R3 is connected to the emitter of the transistor Q and the single-chip microcomputer control module, and the other end of the resistor R3 is connected to the ground.

5. The direct current brushless motor drive control circuit of claim 2, wherein, The direct-current brushless motor drive control circuit further comprises an AC voltage detection module for detecting the alternating current after passing through the interference suppression circuit and feeding back to the single-chip microcomputer control module; the AC voltage detection module comprises a diode D2, a diode D3, a resistor R1 and a resistor R2, the positive electrode of the diode D2 is connected to one end of the output end of the interference suppression circuit, the positive electrode of the diode D3 is connected to the other end of the output end of the interference suppression circuit, the negative electrode of the diode D2 is connected to the negative electrode of the diode D3 and one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2 and the single-chip microcomputer control module, and the other end of the resistor R2 is connected to the ground.

6. The drive control circuit for a brushless DC motor according to any one of claims 2 to 5, wherein The direct-current brushless motor drive control circuit further comprises a DC voltage detection module for detecting the direct current after passing through the PFC circuit and feeding back to the single-chip microcomputer control module; the DC voltage detection module comprises a resistor R4 and a resistor R5, one end of the resistor R4 is connected to the output end of the PFC circuit, the other end of the resistor R4 is connected to one end of the resistor R5 and the single-chip microcomputer control module, and the other end of the resistor R5 is connected to the ground.

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