Miniaturization high-power brushless direct-current motor controller and layout structure thereof

Abstract

The invention relates to a miniaturized high-power brushless DC motor controller, comprising an STM32 core controller module, an analog signal sampling module, an isolation circuit module, a power drive module, a hardware protection circuit module and an RS‑422 communication interface module. The STM32 core controller controls the conduction sequence of the switching tubes of the three-phase full-bridge inverter module, and inverts the DC power into the AC power required by the brushless DC motor. The STM32 core controller is realized by an optocoupler (HCPL‑316J). Drive the three-phase full-bridge inverter. On the other hand, optocoupler (HCPL‑316J) can also be used to isolate the power part and the weak part, so as to ensure the safe operation of the system. The STM32 core controller module is also connected with an analog signal sampling module and a communication interface module for real-time processing of motor data and adjustment of motor speed and state control. At the same time, the STM32 core controller is also connected to the RS422 communication chip ADM2681E interface to facilitate real-time communication with other devices.

Description

technical field [0001] The invention relates to the technical fields of power electronics technology and motor drive control, in particular to a miniaturized design of a high-power brushless DC motor controller. Background technique [0002] In embedded systems, brushless DC motors are developed on the basis of brushed DC motors. Since the appearance of the brushed DC motor in the 1940s, it has occupied a dominant position in the field of motion control for a long period of time due to its high operating efficiency, good speed regulation performance, and excellent torque control characteristics. However, due to the existence of brushes and mechanical reversing devices, its development and application range are limited. The consequence of poor mechanical commutation is that the brushes produce harmful sparks, which may produce ring fires in severe cases, which is particularly prominent in high-power motors. At the same time, DC motor commutation sparks can cause electromagn...

AI Technical Summary

Problems solved by technology

[0005] From the perspective of motor drive modules, most of the existing motor drive modules currently use IPM modules to realize the inverter function of the three-phase full bridge. The advantages of this method are high integration and simple circuit structure; the disadvantage is the price High, once damaged, the entire module must be replaced, high repair costs

The most important thing is that it is bulky and heavy, which does not meet the requirements of the aviation system for miniaturization and light weight

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