Voltage stabilization protection device, motor controller and motor

Abstract

The invention discloses a voltage stabilization protection device, a motor controller and a motor, and the device comprises a switch unit which is disposed at the output side of an external input power supply; the first voltage stabilizing diode unit is arranged on the output side of the switch unit; the current limiting unit is arranged between the first voltage stabilizing diode unit and the load power supply port; at the on-off moment of the switch unit, oscillation negative voltage and oscillation negative current generated by the switch unit can pass through the first voltage stabilizing diode unit and then pass through the current limiting unit. According to the scheme, negative voltage and negative current oscillation are controlled not to flow through the current-limiting resistor of the voltage stabilizing circuit at the moment of on-off of switching elements such as the alternating current contactor, so that the current-limiting resistor can be prevented from being burnt, and the motor failure shutdown is further avoided.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a voltage stabilizing protection device, a motor controller and a motor, in particular to a voltage stabilizing protection circuit for preventing motor on-off faults, a motor controller with the voltage stabilizing protection circuit, and a motor controller with the voltage stabilizing protection circuit The motor of the motor controller. Background technique [0002] When the motor is working, it often cooperates with electrical components such as AC contactors to perform on-off actions to control the operation and stop of the motor. This action can be called tooling on-off. The action sequence is as follows: When the motor is running, the AC contactor is disconnected to stop the motor; When the motor stops, the AC contactor is connected to make the motor run. [0003] In the design of DC motor controllers, the external input power supply is often converted and proce...

AI Technical Summary

Problems solved by technology

In the voltage stabilizing circuit of the related scheme, after the external input power is input to the motor controller, the current limiting function of the current limiting resistor is used first, and then the input voltage and current signals are processed by various components such as the Zener diode, magnetic beads, and filter capacitors. , and then provide the processed, reliable voltage and current required by the motor main control chip to the motor main control chip. When the internal mechanical parts are switched on and off, a large oscillating voltage and oscillating current will be generated. The oscillating voltage and current can be positive or negative. When the negative voltage and current are generated, the Zener diode in the voltage stabilizing circuit of the relevant scheme will conduct forward. , the positive-conducting Zener diode, the current-limiting resistor, and the external input power supply form a loop. The large oscillating negative voltage and negative current of this loop cause the power flowing through the current-limiting resistor to seriously exceed the rated power of the current-limiting resistor, causing the current-limiting resistor to burn out. , so that the power input circuit cannot work, that is, the motor fails to stop

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