A brushless motor control circuit

Abstract

The utility model discloses a kind of brushless motor control circuit, comprising: power input module UB, for providing electric energy for system;Core control chip, the core control chip is integrated with first ADC module, Pre-Driver module and second ADC module;Position detection module, including TMR sensor TA52240, the output of TMR sensor TA52240 is connected with first ADC module;Communication module, including CAN physical layer, the CANH end and CANL end of the CAN physical layer are used to communicate with outside, the output of the CAN physical layer is connected with the core control chip;Drive execution module, including the three-phase bridge circuit of being made of power MOS tube, the output of Pre-Driver module is connected with the control end of three-phase bridge circuit.The utility model, with current acquisition, power diagnosis and the like function, can monitor system operating state in real time, timely discover abnormality and take protective measures.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor control technology, specifically a brushless motor control circuit. Background Technology

[0002] Permanent magnet brushless DC motors are increasingly widely used in many applications due to their numerous advantages, such as no commutation sparks, reliable operation, convenient maintenance, simple structure, and no excitation loss.

[0003] The existing announcement number CN201509176U discloses a brushless motor control system and a brushless motor; the brushless motor control system includes: a microcontroller, a drive circuit, an inverter circuit, a position detection module, and a current detection module; the microcontroller outputs pulse control signals to control the inverter circuit to convert DC voltage into AC voltage and drive the motor to run; the position detection module detects the back EMF of the motor and outputs a position signal; the microcontroller outputs speed control signals to control the motor based on the position signals; the microcontroller outputs power control signals to control the motor based on the motor torque.

[0004] Existing brushless motor control circuits cannot monitor the system's operating status in real time, thus failing to detect abnormalities and take protective measures in a timely manner. Therefore, we propose a brushless motor control circuit. Utility Model Content

[0005] The purpose of this invention is to provide a brushless motor control circuit to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a brushless motor control circuit, comprising: The power input module UB is used to provide power to the system. The core control chip integrates a first ADC module, a pre-driver module, and a second ADC module. The position detection module includes a TMR sensor TA52240, the output of which is connected to a first ADC module. The communication module includes a CAN physical layer, wherein the CANH and CANL terminals of the CAN physical layer are used for external communication, and the output terminal of the CAN physical layer is connected to the core control chip. The drive execution module includes a three-phase bridge circuit composed of power MOSFETs. The output terminal of the Pre-Driver module is connected to the control terminal of the three-phase bridge circuit, and the output terminal of the three-phase bridge circuit is connected to the U phase, V phase, and W phase of the motor M. A current detection module includes a current acquisition circuit, the output of which is connected to a second ADC module. The grounding module GND is used to provide a grounding reference for the system. The shield module is used for electromagnetic protection of the system.

[0007] Preferably, the core control chip is an NXPS32M243CCABWKHST chip or an S32M244CCABWKHST chip.

[0008] Preferably, the power input module UB also supplies power to the logic power supply and the VCP module.

[0009] Preferably, the VDD_EXT terminal of the core control chip is connected to the power input module UB via the UB_Diag line.

[0010] Preferably, the three-phase bridge circuit contains six power MOSFETs, which respectively control the positive and negative terminals of the U, V, and W phases of the motor M.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The integrated TMR sensor TA52240 is used for position detection, and combined with dual ADC modules to collect signals such as position and current, the detection accuracy is high, providing reliable data support for the precise control of the motor.

[0012] Configured with a CAN physical layer communication module, it conforms to the communication standards of industrial fields such as automotive electronics, ensuring stable communication, strong anti-interference capabilities, and facilitating command interaction and status feedback between the system and external devices.

[0013] The Pre-Driver module, in conjunction with an external three-phase bridge power MOSFET, enables efficient motor driving and allows for precise adjustment of motor parameters such as speed and torque according to control requirements.

[0014] It features functions such as current acquisition and power supply diagnostics (UB_Diag), which can monitor the system's operating status in real time, detect abnormalities in a timely manner, and take protective measures. At the same time, it is equipped with a shielding module to effectively reduce electromagnetic interference and improve the safety and stability of the system operation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0017] Please see Figure 1 In this embodiment of the present invention, a brushless motor control circuit includes: The power input module UB is used to provide power to the system. The core control chip integrates a first ADC module, a pre-driver module, and a second ADC module. The core control chip adopts the NXPS32M243CCABWKHST chip or the S32M244CCABWKHST chip, which has powerful computing and control capabilities, can efficiently handle complex algorithms for motor control, and ensure the accuracy and stability of motor operation.

[0018] The position detection module includes a TMR sensor TA52240, the output of which is connected to a first ADC module. The communication module includes a CAN physical layer. The CANH and CANL terminals of the CAN physical layer are used for external communication, and the output terminal of the CAN physical layer is connected to the core control chip. The CAN physical layer communication module is configured to comply with the communication standards of industrial fields such as automotive electronics. It has stable communication, strong anti-interference ability, and facilitates command interaction and status feedback between the system and external devices.

[0019] The drive execution module includes a three-phase bridge circuit composed of power MOSFETs. The output terminal of the Pre-Driver module is connected to the control terminal of the three-phase bridge circuit, and the output terminal of the three-phase bridge circuit is connected to the U phase, V phase, and W phase of the motor M. The Pre-Driver module, in conjunction with an external three-phase bridge power MOSFET, can achieve efficient driving of the motor and can precisely adjust the motor's speed, torque, and other parameters according to control requirements.

[0020] A current detection module includes a current acquisition circuit, the output of which is connected to a second ADC module. The grounding module GND is used to provide a grounding reference for the system. The shield module is used for electromagnetic protection of the system.

[0021] The power input module UB also supplies power to the logic power supply and the VCP module.

[0022] The VDD_EXT terminal of the core control chip is connected to the power input module UB via the UB_Diag line.

[0023] The three-phase bridge circuit contains six power MOSFETs, which control the positive and negative terminals of the U, V, and W phases of motor M, respectively.

[0024] The working principle of this utility model is as follows: Power supply and power supply: The power input UB provides power to the entire system. On the one hand, it powers the logic power supply, VCP module, etc., and on the other hand, it powers the VDD_EXT terminal of the core chip through the UB_Diag line, ensuring the power supply of each module of the system.

[0025] Position detection: The TMR sensor TA52240 detects the motor position information and transmits the output COON and COSP signals to the first ADC module of the core chip to complete the acquisition and conversion of position signals.

[0026] Communication and interaction: The CANH and CANL interfaces of the CAN physical layer communicate with external devices to issue commands and upload status, and the core chip adjusts the control strategy accordingly.

[0027] Drive control: The Pre-Driver module of the core chip outputs control signals to drive a three-phase bridge circuit composed of six power MOSFETs, thereby controlling the on / off state and current magnitude of the U, V, and W phase windings of the motor, and realizing the adjustment of parameters such as motor speed and torque.

[0028] Current monitoring: The current acquisition circuit detects the motor's operating current in real time and transmits the signal to the second ADC module of the core chip to provide current feedback to the system and ensure operational safety.

[0029] Grounding and Protection: The GND module provides a grounding reference to ensure the electrical stability of the circuit; the Shield module provides electromagnetic protection to reduce the impact of external interference on the system.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A brushless motor control circuit, characterized in that, include: The power input module UB is used to provide power to the system. The core control chip integrates a first ADC module, a pre-driver module, and a second ADC module. The position detection module includes a TMR sensor TA52240, the output of which is connected to a first ADC module. The communication module includes a CAN physical layer, wherein the CANH and CANL terminals of the CAN physical layer are used for external communication, and the output terminal of the CAN physical layer is connected to the core control chip. The drive execution module includes a three-phase bridge circuit composed of power MOSFETs. The output terminal of the Pre-Driver module is connected to the control terminal of the three-phase bridge circuit, and the output terminal of the three-phase bridge circuit is connected to the U phase, V phase, and W phase of the motor M. A current detection module includes a current acquisition circuit, the output of which is connected to a second ADC module. The grounding module GND is used to provide a grounding reference for the system. The shield module is used for electromagnetic protection of the system.

2. The brushless motor control circuit according to claim 1, characterized in that, The core control chip is either the NXPS32M243CCABWKHST chip or the S32M244CCABWKHST chip.

3. The brushless motor control circuit according to claim 1, characterized in that, The power input module UB also supplies power to the logic power supply and the VCP module.

4. The brushless motor control circuit according to claim 1, characterized in that, The VDD_EXT terminal of the core control chip is connected to the power input module UB via the UB_Diag line.

5. The brushless motor control circuit according to claim 1, characterized in that, The three-phase bridge circuit contains six power MOSFETs, which control the positive and negative terminals of the U, V, and W phases of motor M, respectively.

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