Soft start control device for high-power motor

A high-power, high-resistance technology, applied in the field of soft-start control devices for high-power motors, can solve the problems of reduced service life of motors, large starting current of motors, and low resistance, so as to improve work efficiency, prolong service life and reduce inconvenience Effect

Inactive Publication Date: 2014-03-12
CHENGDU COLDPLAY NETWORK TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] For a circuit with a high-power motor as a load, because the motor has a large power and low resistance value, the resistance value in the cold state is lower before it is turned on, and the starting current of the motor is very large. Sudden start may cause the phenomenon of burning the motor, causing the motor to burn out. reduced service life

Method used

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  • Soft start control device for high-power motor

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing:

[0011] As shown in the drawings: the present invention includes an AC power supply, a rectifier circuit, a bidirectional thyristor SCR, a unijunction transistor BT, a transformer B, a sliding rheostat W, a voltage regulator tube DW, a fifth diode D5, a first resistor R1, a second The resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2, the input end of the rectifier circuit is connected to the AC power supply, and the anode of the rectifier circuit is connected to the first The first end of a resistor R1 is connected, and the second end of the first resistor R1 is simultaneously connected with the negative pole of the Zener tube DW, the positive pole of the fifth diode D5 and the first end of the fifth resistor R5, and the fifth diode The negative pole of D5 is connected with the first ter...

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Abstract

The invention discloses a soft start control device for a high-power motor. The soft start control device comprises a motor, an alternating current power supply, a rectifying circuit, a bidirectional thyristor, a unijunction transistor, a transformer, a sliding rheostat, a voltage-regulator tube, a fifth diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor. According to the soft start control device, after the rectifying circuit performs rectification, current limitation is performed through the first resistor and after voltage stabilization, the large-capacity capacitors are charged; gradually-increasing (from small to large)of a turn-on angle of the bidirectional thyristor due to trigger pulses can be delayed through the discharge quantity of the sliding rheostat to the unijunction transistor; and even if the resistance value of the sliding rheostat is adjusted to a minimum value, the bidirectional thyristor cannot be connected fully immediately, thereby achieving the purpose of soft start. The speed of the soft start of the motor can be changed through adjusting the sliding rheostat. Through adopting soft start, a surge current of a cold motor can be limited, the motor can be prevented from being burned out, the service life of the motor can be prolonged and inconvenience caused by motor burning in work is reduced.

Description

technical field [0001] The invention relates to a motor controller device, in particular to a soft start control device for a high-power motor. Background technique [0002] For a circuit with a high-power motor as a load, because the motor has a large power and low resistance value, the resistance value in the cold state is lower before it is turned on, and the starting current of the motor is very large. Sudden start may cause the phenomenon of burning out the motor, causing the motor to burn out. reduced service life. Contents of the invention [0003] The object of the present invention is to provide a soft start control device for a high-power motor in order to solve the above problems. [0004] The present invention achieves the above object through the following technical solutions: [0005] The invention includes a motor, an AC power supply, a rectifier circuit, a bidirectional thyristor, a unijunction transistor, a transformer, a sliding rheostat, a voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26
Inventor 肖智宽于晓晖胡正东
Owner CHENGDU COLDPLAY NETWORK TECH
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