Motor abnormality protection circuit
An abnormality protection and circuit technology, applied in the direction of motor control, electrical components, control systems, etc., can solve problems such as bus voltage rise, motor burnout, component aging failure, etc., to reduce reverse speed, protect mechanical structure, and small size Effect
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[0053] In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.
[0054] Existing technologies such as figure 1 and 2 When the drive circuit of the motor shown is damaged or the system is abnormally powered off, the generated current generated by the uncontrolled reverse rotation of the motor goes to the upper arm of the drive bridge to charge the bus capacitor, and there is a problem that the bus voltage is too high. In order to solve the above problems, the applicant developed A motor abnormality protection circuit and protection method are provided.
[0055] The motor abnormal protection circuit includes: drive bridge m...
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