Contactor arcless current distributing-cutting-off method for bypass type motor soft start device

A technology for breaking current and contactors, which is applied in the direction of starter parts, deceleration device parts, circuits, etc., can solve problems such as arc interference, and achieve the effects of shortening life, reducing the magnetic force of the magnetic mechanism, and reducing power consumption

Inactive Publication Date: 2006-10-25
天津国源新能节能设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the long-term problem of arc interference in the design of the contactor, make full use of the existing settings of the soft starter, so that the contactor does not generate an arc when the current is broken, and provide a bypass type motor soft starter. The method of breaking the current without arc, simplifies the overall structure of the motor soft starter, improves the reliability of contactor contact, and prolongs its service life

Method used

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  • Contactor arcless current distributing-cutting-off method for bypass type motor soft start device
  • Contactor arcless current distributing-cutting-off method for bypass type motor soft start device
  • Contactor arcless current distributing-cutting-off method for bypass type motor soft start device

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Embodiment Construction

[0011] Such as Figure 1-Figure 3 As shown, a method for breaking current without arcing by the contactor of the bypass type motor soft starter, the circuit control part of the bypass type motor soft starter consists of a main control circuit, a thyristor trigger circuit, a thyristor and a contactor Composed of connections, AC 380V three-phase electrical input lines U1, V1, W1 and AC 380V three-phase electrical output lines U2, V2, W2 are connected in parallel with bidirectional thyristors KG1, KG2, KG3 and contactors; G1, G2 and G3 are triac trigger terminals; KM is a contactor contact. Connect the main control circuit board with the control terminal of the bidirectional thyristor connected in parallel at both ends of the contactor, and when the contactor is about to be disconnected, send an instruction through the program in the microcontroller on the main control circuit board to control the thyristor to be triggered In other words, a set of mechanical contacts are connect...

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Abstract

This invention relates to a method for cutting current without arc by a contactor for a soft starting device of a bypass motor, in which, the circuit control part of the starting device is composed of a primary control circuit, a thyristor trigger circuit, thyristor and contactor which are jointed, the primary control circuit board is connected with the control end of a two-way thyristor in parallel with to both ends of the contactor and the program in a micro-controller on the board sends an order to control triggering the thyristor to be conducted when the contactor is going to be cut off, thus, current can be conducted by the bypass of the thyristor in the cut-off of the contactor, so no arc happens when the contactor is cut off.

Description

technical field [0001] The invention relates to an operation control method of a motor starting device, in particular to a method for breaking current without an arc in a contactor of a bypass type motor soft starting device. Background technique [0002] At present, most electric motors that need to be started with reduced voltage use electronic soft starters, which can not only reduce the impact brought by the direct starting of the motor to the driving equipment, but also reduce the impact of high current on the power grid when the motor starts. The existing foreign motor soft starters all adopt the online operation and bypass operation mode, some are used directly online, and some are used by bypass. When used online, the power consumption of the thyristor is quite large, so the energy consumption increases; in order to ensure heat dissipation, mechanical air cooling must be used, so the overall structure of the soft starter is complex and bulky. At the same time, in or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/30H01H9/54H02P1/02H02P1/04H02P3/02
Inventor 韩永清杨勇张耀军高会宾
Owner 天津国源新能节能设备有限公司
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