Control circuit, braking method, energy production method and device for DC motor

Abstract

The invention relates to a DC motor control circuit, a braking method, an electricity generating method and a device thereof, in particular to the problems of the starting, the speed regulation, the braking and the reversal rotation of a series excitation DC motor. The control circuit comprises an excitation circuit (7), an armature circuit (8) and a DC voltage transforming circuit (9), and has the characteristics of reusing the braking energy and no mechanical contact point in reversal rotating control. The braking method reuses the braking energy, and the electricity generating method utilizes the rotation of the series excitation DC motor to generate electricity. The device of the invention realizes the stable starting, the stepless speed control, the stepless braking and the running of reversal rotation, the energy in braking is fed back or reused, and the energy in braking can be effectively controlled if the series excitation DC motor rotates when the electricity is cut off. No input electric source exists. If the series excitation DC motor continuously rotates under the action of external force, the device is an electricity generator of the series excitation DC motor and can provide an electric source for the outside.

Description

technical field [0001] The patent relates to a motor control circuit, braking method, power generation method and device, especially a control circuit for a series-excited DC motor, its braking method, power generation method and device. Background technique [0002] At present, it is used in traction of urban light rail, trackless and tram, traction of electric locomotives in mines and factories, driving of electric golf carts, electric patrol cars, electric sightseeing cars, electric service vehicles in venues, driving electric forklifts, push trucks, electric motorcycles Series-excited DC motors are widely used in vehicles, bicycles and other lifting and transportation equipment, as well as in other industrial fields that require electric equipment. [0003] In practical applications, the drive control of series-excited DC motors includes starting, speed regulation, braking and reverse. According to the basic knowledge of series-excited DC motors, the methods used to sta...

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at the problem in the prior art that the chopper circuit of the series-excited DC motor cannot or cannot realize the feedback or reuse of the braking energy of the series-excited DC motor, and uses a mechanical contact for the reverse control of the existing series-excited DC motor For the problem of contactors, a new circuit scheme was proposed, and a new braking method and power generation method were proposed, as well as a series-excited DC motor drive control device and power generation device made with the new circuit and method

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