【开源电机驱动】H桥保护之反电势问题

最新推荐文章于 2025-03-09 23:28:47 发布

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最新推荐文章于 2025-03-09 23:28:47 发布

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本文探讨了在电机驱动中如何通过过压保护电路吸收反电势，重点介绍了能量来源、过压保护原理及泄流电阻的选择。推荐使用水泥电阻作为泄流电阻，以限制电压并消耗多余能量。

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Over Voltage Protection

过压保护

Introduction

引言

As we have described earlier, capacitors can be used to absorb the back EMF of a motor. But capacitance absorption is only suitable for small load, that is, the energy generated by the motor as a generator is not large. When the load driven by the motor is very large (such as driving a flywheel), the capacitor volume or price required will be unacceptable. For example, the capacitance of 6800uf is about 25 * 35mm, and the price is around 6 RMB. This price is enough to buy a high-performance MCU. Please note that this is only uF class capacitor, and mF, F class, these levels of capacitance, the price is unimaginable.

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