A brush lifting control system and method for a high-voltage winding motor

Abstract

The invention discloses a brush lifting control system and method for a high-voltage wire-wound motor, comprising first and second servo motors, a collector ring short-circuit switch, first, second, third and fourth proximity switches, and a first relay , the second relay; the first servo motor is connected to the carbon brush to lift and drop parts, the second servo motor is connected to the collector ring short-circuit switch; the first servo motor is connected to the power supply through the first contactor and the second contactor, and the second servo motor Connect the power supply through the third contactor and the fourth contactor respectively; the second relay and the first proximity switch are connected in series in the first contactor coil circuit; the fourth and second proximity switches are connected in series in the second contactor coil circuit ; The first and third proximity switches are connected in series in the coil loop of the third contactor; the first relay and the fourth proximity switch are connected in series in the coil loop of the fourth contactor. The invention automatically shorts the collector ring and lifts the carbon brush after the motor is started, so as to overcome the disadvantage of continuous friction between the collector ring and the carbon brush during operation.

Description

technical field [0001] The invention relates to the field of start-up of a high-voltage wire-wound motor, in particular to a brush-lifting control system and method for a high-voltage wire-wound motor. Background technique [0002] High-voltage wound wire motor is a kind of asynchronous motor, which is the most widely used and most demanded motor in industrial and agricultural production and various sectors of the national economy. Most of metal cutting machine tools, steel rolling equipment, blowers, pulverizers, water pumps, oil pumps, light industrial machinery, textile machinery, mining machinery, etc. are driven by asynchronous motors. In electric drive, the vast majority of drive motors are asynchronous motors, and their power consumption accounts for about 60% of the total load of the power grid. For some constant torque production machinery (mills, crushers, etc.) that start under heavy loads, not only the starting current must be limited, but also a sufficiently la...

AI Technical Summary

Problems solved by technology

[0004] (1) The consumption of carbon brushes is large and the operating cost is high;

[0005] ⑵The toner produced by friction is likely to cause short-circuit and arcing faults;

[0006] (3) Daily maintenance workload such as carbon brush inspection and replacement, toner cleaning, etc. is heavy

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