Wide voltage energy-saving controller for contactor

A contactor, wide voltage technology, applied in circuits, relays, electrical components, etc., can solve problems such as high operating noise, high power consumption, and narrow operating voltage range.

Inactive Publication Date: 2007-03-07
SHANGHAI ZHAKE ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of narrow operating voltage range, high maintenance power consumption and high operating noise of common contactors, the present invention proposes a contro

Method used

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  • Wide voltage energy-saving controller for contactor
  • Wide voltage energy-saving controller for contactor

Examples

Experimental program
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Embodiment Construction

[0008] As shown in Figure 2, AC1 and AC2 are connected to the control power supply of the contactor, and Out1 and Out2 are connected to the coil of the contactor. Adjusting resistor R14 can adjust the pull-in current of the contactor; adjusting resistor R16 can adjust the holding current of the contactor; adjusting resistor R3 can adjust the voltage value of undervoltage protection; when the contactor is opened, the power device Q2 is turned off, Quickly break the current in the coil of the contactor to realize the quick opening of the contactor.

[0009] By controlling the coil voltage of the contactor, the circuit of the present invention makes the contactor pull in and maintain a constant current, and the coil current fluctuates very little with the applied voltage, thereby realizing wide voltage operation of the contactor, low power consumption and no noise.

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Abstract

This invention relates to contact voltage energy saving controller in power electrical technique field, which comprises rectification circuit, switch circuit, afterglow loop, start loop, PWM control loop, voltage shortage protective loop and power loop set and solves the coil burnt problem when the regular contact is over large on control voltage.

Description

technical field [0001] It belongs to the technical field of power electronics. By controlling the input voltage of the contactor coil, the contactor can operate reliably within a wide range of control voltage variation, and can greatly reduce the power consumption of the contactor and eliminate operating noise. Background technique [0002] The control voltage of ordinary contactors is directly applied to the coil, and the working voltage range is narrow. When the grid voltage is too low, it will not work normally. If it is in this state for a long time, the coil will be burned. When the grid voltage is too high, the coil will also be burned due to excessive current. At the same time, ordinary contactors still have the problems of high power consumption and high operating noise. Contents of the invention [0003] In order to solve the problems of narrow operating voltage range, high maintenance power consumption and high operating noise of common contactors, the present...

Claims

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Application Information

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IPC IPC(8): H01H47/02
Inventor 黎军徐鸣谦
Owner SHANGHAI ZHAKE ELECTRICITY
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