Permanent magnetic machine controller based on pulse modulation technology

Abstract

The utility model discloses a controller of permanent magnetism structure based on pulse-width modulation technology, and comprises a winding power supply module and a pulse-width modulation controlling module, wherein the winding power supply module comprises a rectification filter circuit and a voltage-reducing chopper circuit connected with the rectification filter circuit; while the pulse-width modulation controlling module comprises a time delay circuit, a control signal regulating circuit and a PWM control circuit. The utility model adopts the working process that alternating current is first rectified and filtered, and then flows through the voltage-reducing chopper circuit in order to turn into required adjustable direct chopping voltage; then the voltage is loaded on the winding of the permanent magnetism structure; and a control impulse is output from the PWM control circuit and adjusts the control voltages on the ends of the winding by opening or closing a power switch in the voltage-reducing converter. The utility model can control the new permanent magnetism structure with automatic and specific cutoff function without separate tripping, and has the advantages of simple structure, compact, steady control process, strong anti-interference and low cost.

Description

technical field [0001] The invention belongs to the field of medium and low-voltage electrical appliances of power transmission and distribution equipment, and relates to a permanent magnet mechanism controller, in particular to a permanent magnet mechanism controller based on pulse width modulation technology. Background technique [0002] Due to the unique advantages of the DC grid structure, there is a tendency to transition from the traditional low-voltage AC radial network to the medium-voltage AC / DC ring network in the field of ship power. Therefore, research on medium-voltage DC power systems and supporting equipment has become a worldwide hotspot. For the medium-voltage DC grid, the lack of DC circuit breakers makes it one of the important links in the study of DC network protection actions. Due to the unique advantages of the permanent magnet mechanism and its successful application in the field of vacuum circuit breakers and contactors, the permanent magnet operat...

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