High-voltage winding type motor brush lifting control system and method

Abstract

The invention discloses a high-voltage winding type motor brush lifting control system and method. The system comprises a first servo motor, a second servo motor, a collecting ring short-circuit switch, a first proximity switch, a second proximity switch, a third proximity switch, a fourth proximity switch, a first relay and a second relay. The first servo motor is connected with a carbon brush lifting and dropping part. The second servo motor is connected with the collecting ring short-circuit switch. The first servo motor is connected with a power source by means of a first contactor and a second contactor. The second servo motor is connected with the power source through a third contactor and a fourth contactor. The second relay and the first proximity switch are connected into a coil loop of the first contactor in series. The fourth proximity switch and the second proximity switch are connected into a coil loop of the second contactor in series. The first proximity switch and the third proximity switch are connected into a coil loop of the third contactor in series. The first relay and the fourth proximity switch are connected into a coil loop of the fourth contactor in series. According to the system, the motors are automatically connected with a collecting ring in a short mode after being started, the carbon brush is lifted, and the defect of continuous friction between the collecting ring and the carbon brush in the operating process is overcome.

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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