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Real-time control intelligent alternating-current contactor with full-closed loops

An AC contactor, real-time control technology, applied in relays, electrical components, circuits, etc., can solve the problems of difficulty in intelligent control of AC switch electrical appliances, and achieve the effect of reducing large inrush current and strengthening the protection function

Inactive Publication Date: 2012-07-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phase angle, amplitude and other parameters of the AC system change with time. When the AC switching device is switched on or off at different times, the arc generated due to the large difference between the voltage and current is essentially different (from no arc to Very strong arc), therefore, brings great difficulties to the intelligent control of AC switching appliances

Method used

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  • Real-time control intelligent alternating-current contactor with full-closed loops
  • Real-time control intelligent alternating-current contactor with full-closed loops

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Embodiment Construction

[0025] The invention provides a fully closed-loop real-time control intelligent AC contactor, including a rectified power supply, characterized in that: the power supply supplies power to the contactor coil through a power electronic switch, and the contactor coil is provided with sampling resistance and current Sampling sensor, the sampling resistance sequentially passes through an isolation circuit, a first filter circuit, a first program-controlled operational amplifier, a first PID or hysteresis control circuit, a first compensation network, a first PWM control circuit, a multiplexer, The isolated drive circuit is connected with the power electronic switch to form a closed-loop start-up, which can accurately control the start-up current of the AC contactor; the current sampling sensor passes through the second filter circuit, the second program-controlled operational amplifier, the second PID or the The loop control circuit, the second compensation network, the second PWM c...

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Abstract

The invention relates to a real-time control intelligent alternating-current contactor with full-closed loops. The whole-process real-time dynamic online control of the intelligent alternating-current contactor is realized through efficiently adjusting the three closed loops at a high frequency, i.e. a starting current closed loop, a holding current closed loop and a contact system feedback loop. A system plans to introduce a switch power supply technology, a high-frequency control technology, a closed-ring control technology, a self-adaptive control technology, a wavelet analysis method and the like into the intelligent control of the alternating-current contactor, and particularly, a signal of a contactor system is introduced into the control closed loops of the intelligent alternating-current contactor so as to realize the intelligent control of the full-closed loops in the running process of the alternating-current contactor.

Description

technical field [0001] The invention relates to the field of intelligent control of equipment, in particular to a fully closed-loop real-time control intelligent AC contactor. Background technique [0002] In the 1980s, in order to carry out energy-saving and silent operation control, the coil of the electromagnetic mechanism operated by the AC contactor started a strong DC excitation current during the pull-in process of the electromagnetic mechanism, so that the electromagnetic mechanism had enough suction to overcome the reaction force and move the movable part. . When the iron core is closed, a small holding DC excitation current is applied, and the short-circuit ring is eliminated, so as to achieve the purpose of energy saving and no noise. In the 1990s, Fuji Corporation of Japan proposed the super electromagnetic mechanism circuit of the SC series contactor. It not only has the characteristics of energy saving and no noise, but also adds a threshold voltage link to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00
Inventor 许志红汤龙飞郑昕林抒毅
Owner FUZHOU UNIV
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