Non-contact controller for large-power series excitation direct current motor

Abstract

A non-contact controller for a large-power series excitation direct current motor comprises a main circuit and a control circuit. The main circuit comprises a control power circuit, a large-power series excitation direct current motor non-contact switch reversing circuit, a large-power series excitation direct current PWM pulse-width control motor switch speed regulation circuit and a CPU central control circuit. The control circuit is composed of the CPU central control circuit, a large-power series excitation direct current motor plug braking circuit and a large-power series excitation direct current motor reversion speed-limiting circuit. According to the size of a load, the large-power series excitation direct current motor is regulated, a large-power series excitation direct current PWM motor is operated at the maximum power ratio, the purposes of non-contact switch reversing, electric plug braking and energy saving of the large-power series excitation direct current motor are achieved, voice is avoided, sparkles are avoided, the explosion resistance is good, service life is long, operation reliability is good, the large-power series excitation direct current motor plug braking circuit is additionally arranged through the CPU central control circuit, the electric braking capacity of the large-power series excitation direct current motor is achieved when the large-power series excitation direct current motor stops working, and operation of the large-power series excitation direct current motor is safer.

Description

technical field [0001] The invention relates to a motor controller, in particular to a controller for non-contact switch commutation of a high-power series-excited DC motor and non-contact braking of a high-power series-excited DC motor, belonging to the technical field of switching and control. Background technique [0002] The high-power series-excited DC motor controllers all use mechanical commutation due to the large working current, which makes noise and sparks during operation, poor explosion-proof performance, short service life and unreliable work. And the high-power series-excited DC motor controller has no electric braking function, so the DC motor is not safe when running. And there is no deceleration function when reversing, causing a great safety hazard. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a non-contact commutation and non-contact electric braking control syst...

AI Technical Summary

Problems solved by technology

[0002] High-power series-excited DC motor controller, due to the large working current, all adopt mechanical commutation, there is sound when working, sparks are generated, the explosion-proof performance is poor, the service life is short, and the work is unreliable

Moreover, the high-power series-excited DC motor controller has no electric braking function, and the DC motor is not safe to run

And there is no deceleration function when reversing, causing a great safety hazard

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