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Liquid resistor starting device

A starting device and liquid resistance technology, which is applied in the direction of motor generator/starter, single multi-phase induction motor starter, etc., can solve the problems of large grid impact and large starting current, and achieve small grid impact and small starting current Effect

Inactive Publication Date: 2014-09-03
GUANGXI YUFENG GRP CEMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a liquid resistance starting device, which can solve the problem of large starting current and large impact on the power grid of high-voltage wound AC motors that start heavy loads such as mine crushers.

Method used

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  • Liquid resistor starting device

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0011] figure 1 In the liquid resistance starting device shown, one end of the main contact of the high-voltage vacuum contactor 1 is connected to the power supply, the other end is connected to the three-phase winding of the stator of the main motor, and the rotor is kept in operation. One end of the metal resistance 2 is electrically connected to the three-phase winding of the rotor of the main motor , and the other end is connected to the liquid resistor 3 through a wire; the main contact of the short-circuit contactor 4 is provided on the connection line between the rotor retaining running metal resistor 2 and the liquid resistor 3 . The moving plate in the liquid resistor 3 is mechanically connected to the lifting motor 5, one end of the junction box of the lifting motor 5 is electrically connected to one end of the main contact of the forward and r...

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Abstract

The invention discloses a liquid resistor starting device, and relates to the technical field of electric equipment manufacture. The starting device comprises a high-voltage contactor, of which one end of a main contact head is connected with a power supply and the other end is connected with a main motor stator winding; a rotor reservation operation resistor; and a liquid resistor. One end of the rotor reservation operation resistor is connected with a main motor rotor winding, and the other end is electrically connected with a static pole plate at one end of the liquid resistor. A main contact head of a short circuit contactor is arranged on the connecting line between the rotor reservation operation resistor and the liquid resistor. A movable pole plate in the liquid resistor is connected with a lifting motor. One end of a junction box of the lifting motor is electrically connected with one end of the main contact head of a positive and negative rotation contactor. The other end of the main contact head of the positive and negative rotation contactor is connected with the power supply. The starting device can help to solve the problems that the starting current of a heavy load-starting high-voltage wingding-type AC motor of a mine crusher and the like is large, and big impact is caused to a power grid.

Description

technical field [0001] The invention relates to the technical field of electrical equipment manufacturing, in particular to a liquid resistance starting device for starting a high-voltage wound AC motor. Background technique [0002] Heavy-duty starting high-voltage wound AC motors such as mine crushers are generally started with metal resistors and frequency-sensitive rheostats. This starting method has a large starting current of the motor, so it has a large impact on the power grid. Contents of the invention [0003] The purpose of the present invention is to provide a liquid resistance starting device, which can solve the problem of large starting current and large impact on the power grid of high-voltage wound AC motors starting heavy loads such as mine crushers. [0004] In order to solve the above-mentioned problems, the technical solution adopted by the present invention is: this liquid resistance starting device includes a high-voltage contactor in which one end o...

Claims

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Application Information

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IPC IPC(8): H02P1/36
Inventor 蔡西平黎锋
Owner GUANGXI YUFENG GRP CEMENT CO LTD
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