Direct-current brushless driving controller and control system

Abstract

The utility model discloses a direct current brushless drive controller and a control system, the direct current brushless drive controller at least comprises a control module, a power module and a sampling module, the control module is connected with the sampling module through the power module, and the sampling module is connected with the control module through the power module. The sampling module is connected with the motor camera; the control module is used for controlling the power module; the power module is used for providing a three-phase power supply for the motor; the sampling module is used for sampling current in a current detection resistor in the power module, and through the controller provided by the invention, a position sensor is not needed, so that the efficiency and the accuracy of the motor are improved, and the cost and the maintenance requirement of the system are also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electromechanical control technical field especially relates to a direct current brushless drive controller and control system. BACKGROUND

[0002] The existing direct current brushless motor control system needs to set position sensor in the control system in the process of controlling motor movement, but the detection efficiency of position sensor will be affected by environment under high speed and high load conditions, and the installation and maintenance cost of position sensor is also higher, and then the accuracy or efficiency of motor control is also lower, therefore, how to improve the accuracy and reliability of motor control is the problem that needs to be solved currently. SUMMARY

[0003] In view of the above technical problems, the utility model provides a direct current brushless drive controller and control system.

[0004] Firstly, the utility model provides a direct current brushless drive controller, at least includes: control module, power module and sampling module, wherein, the control module is connected with the sampling module through the power module, and the sampling module is connected with motor;

[0005] The control module is used for controlling the power module;

[0006] The power module is used for providing three-phase power supply for the motor respectively;

[0007] The sampling module is used for sampling the current in the current detection resistor in the power module.

[0008] Optionally, the control module at least includes SLM2101 chip.

[0009] Optionally, the first pin of the control module is connected with power supply, the second pin and the third pin of the control module are connected with modulation signal respectively, and the seventh pin and the fifth pin of the control module are connected with the power module respectively.

[0010] Optionally, the power module at least includes first switch tube, second switch tube, third switch tube, fourth switch tube, fifth switch tube and sixth switch tube, wherein:

[0011] The seventh pin of the control module is connected with the gate of the first switch tube through the fifty-seventh resistance;

[0012] The fifth pin of the control module is connected with the gate of the second switch tube through the fifty-sixth resistance;

[0013] The drain of the first switch tube, the drain of the third switch tube and the drain of the fifth switch tube are connected with a power supply;

[0014] The source of the first switch tube is connected with the drain of the second switch tube, the source of the third switch tube is connected with the drain of the fourth switch tube, and the source of the fifth switch tube is connected with the drain of the sixth switch tube.

[0015] The source of the second switch tube is connected with the first end of the sixty-first resistor, the source of the fourth switch tube is connected with the first end of the one hundred and tenth resistor, and the second end of the sixty-first resistor, the second end of the one hundred and tenth resistor and the source of the sixth switch tube are connected with the ground through the seventy-first resistor.

[0016] Optionally, the source of the first switch tube is connected with a power supply of a first phase, the source of the third switch tube is connected with a power supply of a second phase, and the source of the fifth switch tube is connected with a power supply of a third phase.

[0017] Optionally, the switch tube is an N-channel MOS tube.

[0018] Optionally, the first end of the seventy-first resistor is connected with the first end of the seventy-ninth resistor in the sampling module, the second end of the seventy-ninth resistor is connected with the third pin in the operational amplifier through the eightieth resistor, and the second pin in the operational amplifier is connected with the first pin in the operational amplifier through the ninety-first resistor.

[0019] In a second aspect, the utility model provides a kind of direct current brushless drive control system, the direct current brushless drive control system at least includes the direct current brushless drive controller and motor of any one described in the first aspect, and the direct current drive controller is connected with the motor by default interface.

[0020] Optionally, the direct current drive controller is connected with the motor by motor line interface, hall line interface and control signal interface.

[0021] Optionally, the direct current drive controller further includes RS485 interface.

[0022] The direct-current brushless drive controller and the control system provided by the utility model, direct-current brushless drive controller at least includes: control module, power module and sampling module, wherein, the control module is connected with the sampling module through the power module, the sampling module is with motor camera;The control module is used for controlling power module;The power module is used for providing three-phase power supply for motor respectively;The sampling module is used for sampling the current in the current detection resistor in the power module, through the controller provided by the application, position sensor is not needed, in this way, not only improve the efficiency and accuracy of motor, also reduce the cost and maintenance requirement of system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model provides a kind of direct-current brushless drive controller's structural schematic diagram provided by the utility model embodiment;

[0024] Figure 2 The utility model provides power circuit schematic diagram;

[0025] Figure 3 The utility model provides controller interface schematic diagram;

[0026] Figure 4 The utility model provides control block diagram;

[0027] Figure 5 The utility model provides the circuit diagram of current sampling;

[0028] Figure 6 The utility model provides the schematic diagram of pre-drive part. DETAILED DESCRIPTION

[0029] The technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0030] Please refer to Figure 1 The utility model provides a kind of circuit schematic diagram of direct-current brushless drive controller, and direct-current brushless drive controller includes control module 101, power module 102 and sampling module 103, wherein, control module 101 is connected with sampling module 103 by power module 102, and sampling module 103 is with motor camera;

[0031] Control module 101 is used to control power module;

[0032] The power module 102 is used for providing three-phase power supply for the motor respectively.

[0033] The sampling module 103 is used for sampling the current in the current detection resistor in the power module.

[0034] As shown in Figure 6 and Figure 2 , the control module at least includes an SLM2101 chip.

[0035] The SLM2101 chip is used for controlling the power circuit to generate six-way pulse for independent control. The input control information of the power circuit is modulated, which can efficiently improve the independent control of the MOS and improve the control precision.

[0036] Optionally, the first pin of the control module is connected with the power supply VDD, the second pin and the third pin of the control module are connected with the modulation signals (PWM1_M and PWM2_L) respectively, and the seventh pin U_H and the fifth pin U_L of the control module are connected with the power module respectively.

[0037] As shown in Figure 2 , the power module at least includes a first switch tube M1, a second switch tube M2, a third switch tube M3, a fourth switch tube M4, a fifth switch tube M5 and a sixth switch tube M6, wherein:

[0038] The seventh pin of the control module SLM2101 chip is connected with the gate of the first switch tube M1 through the fifty-seventh resistor R57;

[0039] The fifth pin of the control module is connected with the gate of the second switch tube M2 through the fifty-sixth resistor R56;

[0040] The drain of the first switch tube M1, the drain of the third switch tube M3 and the drain of the fifth switch tube M5 are connected with the power supply;

[0041] The source of the first switch tube M1 is connected with the drain of the second switch tube M2, the source of the third switch tube M3 is connected with the drain of the fourth switch tube M4, and the source of the fifth switch tube M5 is connected with the drain of the sixth switch tube M6;

[0042] The source of the second switch tube M2 is connected with the first end of the sixty-first resistor R61, the source of the fourth switch tube is connected with the first end of the one hundred and tenth resistor R110, the second end of the sixty-first resistor R61, the second end of the one hundred and tenth resistor R110 and the source of the sixth switch tube M6 are connected with the ground through the seventy-first resistor R71.

[0043] Optionally, the source of the first switch tube M1 is connected with the power supply of the first phase, the source of the third switch tube M3 is connected with the power supply of the second phase, and the source of the fifth switch tube M5 is connected with the power supply of the third phase.

[0044] Optionally, the switch tube is an N-channel MOS tube.

[0045] As shown in Figure 2 , the power inverter circuit provides power for the external output of the driver, the pins U-V-W correspond to the power lines of the three phases of the motor respectively, and the three current detection resistors are used for sampling three currents.

[0046] As shown in Figure 5 and Figure 2 , optionally, the first end of the seventy-first resistor R71 is connected with the first end of the seventy-ninth resistor R79 in the sampling module, the second end of the seventy-ninth resistor R79 is connected with the third pin in the operational amplifier through the eightieth resistor R80, and the second pin of the operational amplifier is connected with the first pin of the operational amplifier through the ninety-first resistor.

[0047] Among them, the operational amplifier is an LM358 chip.

[0048] The embodiment of the application provides a differential sampling circuit, which differentially samples the current detection resistor of the power circuit, Figure 2 samples the current of the power circuit, and has the advantages of high efficiency, strong anti-interference ability, stable gain, common-mode noise suppression, improved dynamic range and common-mode drift suppression.

[0049] The utility model provides a kind of direct current brushless drive control system, direct current brushless drive control system at least includes the direct current brushless drive controller and motor of any of the first aspect, and direct current drive controller is connected with motor by preset interface.

[0050] As shown in Figure 3 , optionally, the direct current drive controller is connected with the motor through motor line interface, hall line interface and control signal interface, and the direct current drive controller is used to execute the control mode as shown in Figure 4 .

[0051] Optionally, the direct current drive controller further includes an RS485 interface.

[0052] The direct-current brushless driving controller and the control system provided by the utility model, direct-current brushless driving controller at least includes: control module, power module and sampling module, wherein, control module is connected with sampling module through power module, sampling module and motor camera;Control module is used for controlling power module;Power module is used for providing three-phase power supply for motor respectively;Sampling module is used for sampling current in current detection resistor in power module, through the controller provided by the application, position sensor is not needed, in this way, not only improve the efficiency and accuracy of motor, also reduce the cost and maintenance demand of system.

[0053] The utility model embodiment provides a kind of direct-current brushless motor driver system of power reaches 300W, to meet high power demand and improve system efficiency.It mainly includes:

[0054] Efficient power conversion: using advanced power electronic devices and precision operational amplifier sampling current control, realize high-efficiency power conversion, maximize motor power output.

[0055] Intelligent motor control: introduce advanced field-oriented control algorithm (FOC) and position sensorless technology, ensure stable operation of motor under different load conditions, improve dynamic response and energy efficiency.

[0056] System integration design: replace more precise electronic components to optimize circuit board layout and power supply module, ensure the compactness and electromagnetic compatibility of the whole system, adapt to various industrial application environments.

[0057] Through these key technical features, the direct-current brushless motor driver system can effectively meet the 300W power demand, and provide reliable and efficient electric drive solutions for industrial applications.

[0058] Heat dissipation management optimization: for 300W high power output, efficient heat dissipation system is designed, including copper substrate and heat dissipation fin structure, combined with intelligent temperature control algorithm, to ensure stable operation of the driver under high load for a long time, avoid performance degradation or damage due to overheating.

[0059] Programmable features: integrated programmable controller, users can set parameters and monitor in real time through dedicated software interface, meet individual needs in different application scenarios.Support multiple communication protocols, such as CAN, RS485, etc., easy to integrate with other industrial equipment and data exchange. Efficient power conversion and field-oriented control algorithm reduce energy loss, so that motor maintains high efficiency under different load conditions, circuit system has multiple protection functions (such as overcurrent protection, overvoltage protection, undervoltage protection and short circuit protection), ensure the safety and stability of motor and driver under abnormal working conditions.

[0060] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A direct current brushless drive controller, characterized by, The controller comprises at least a control module, a power module and a sampling module, wherein the control module is connected to the sampling module through the power module, and the sampling module is connected to the motor; The control module is used for controlling the power module; The power module is used for providing three-phase power supply for the motor respectively; The sampling module is used for sampling the current in the current detection resistor in the power module.

2. The direct current brushless drive controller of claim 1, wherein, The control module comprises at least an SLM2101 chip.

3. The direct current brushless drive controller of claim 2, wherein, The first pin of the control module is connected to the power supply, the second pin and the third pin of the control module are connected to the modulation signals respectively, and the seventh pin and the fifth pin of the control module are connected to the power module respectively.

4. The direct current brushless drive controller of claim 3, wherein, The power module comprises at least a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, wherein: The seventh pin of the control module is connected to the gate of the first switch tube through the fifty-seventh resistor; The fifth pin of the control module is connected to the gate of the second switch tube through the fifty-sixth resistor; The drain of the first switch tube, the drain of the third switch tube and the drain of the fifth switch tube are connected to the power supply; The source of the first switch tube is connected to the drain of the second switch tube, the source of the third switch tube is connected to the drain of the fourth switch tube, and the source of the fifth switch tube is connected to the drain of the sixth switch tube; The source of the second switch tube is connected to the first end of the sixty-first resistor, the source of the fourth switch tube is connected to the first end of the one hundred and tenth resistor, and the second end of the sixty-first resistor, the second end of the one hundred and tenth resistor and the source of the sixth switch tube are connected to the ground through the seventy-first resistor.

5. The direct current brushless drive controller of claim 4, wherein, The source of the first switch tube is connected to the power supply of the first phase, the source of the third switch tube is connected to the power supply of the second phase, and the source of the fifth switch tube is connected to the power supply of the third phase, wherein the power supply of the first phase, the power supply of the second phase and the power supply of the third phase are three-phase power supply.

6. The direct current brushless drive controller of claim 4, wherein, The switch tube is an N-channel MOS tube.

7. The direct current brushless drive controller of claim 4, wherein, The first end of the seventy-first resistor is connected to the first end of the seventy-ninth resistor in the sampling module, the second end of the seventy-ninth resistor is connected to the third pin of the operational amplifier through the eighty-first resistor, and the second pin of the operational amplifier is connected to the first pin of the operational amplifier through the ninety-first resistor.

8. A direct current brushless drive control system characterized by, The direct-current brushless drive control system comprises at least the direct-current brushless drive controller and the motor according to any one of claims 1-7, and the direct-current brushless drive controller is connected to the motor through a preset interface.

9. The direct current brushless drive control system of claim 8, wherein, The direct-current brushless drive controller is connected to the motor through a motor line interface, a Hall line interface and a control signal interface.

10. The direct current brushless drive control system of claim 8, wherein, The direct-current brushless drive controller further comprises an RS485 interface.

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