Energy saver for AC contactor

An energy-saving device and half-wave rectification technology, applied in relays, electromagnetic relays, detailed information of electromagnetic relays, etc., can solve problems such as high cost, internal program execution errors, and susceptibility to interference, so as to prolong service life, reduce coil noise and Temperature rise and the effect of expanding the scope of application

Inactive Publication Date: 2010-06-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the AC contactor energy savers on the market are implemented by single-chip microcomputers, which are relatively expensive and are easily interfered and cause internal program execution errors

Method used

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  • Energy saver for AC contactor
  • Energy saver for AC contactor
  • Energy saver for AC contactor

Examples

Experimental program
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Embodiment Construction

[0016] as attached figure 1 As shown, an energy saver for an AC contactor includes resistor R1, resistor R2, resistor R3, resistor R4, diode D1, diode D2, Zener diode D3, Zener diode D4, electrolytic capacitor C1, ceramic capacitor C2 , ceramic capacitor C3, one-way thyristor Q1 and signal converter. 220V or 380V AC is input between the first input signal AC1 and the second input signal AC2, the second input signal AC2 is used as the reference ground of the circuit, the anode of the diode D1 is connected to the first input signal AC1 to form a half-wave rectifier circuit, and the cathode of the diode D1 Point E is the output end of the half-wave rectifier circuit.

[0017] Resistor R3 and Zener diode D3 are connected in parallel and then connected in series with resistor R2 to form a power frequency (50Hz) square wave generating circuit, which generates a square wave signal with an approximate period of 20ms and a duty cycle of 50% (pulse width is 10ms). , the resistance R3...

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PUM

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Abstract

The invention discloses an energy saver for an AC contactor, which comprises a half-wave rectification circuit, a square-wave generation circuit, a DC voltage-regulated power supply circuit, a signal converter and a charge/discharge circuit. The half-wave rectification circuit is used for half-wave rectification of mains power, the square-wave generation circuit is used for providing square-wave input for the signal converter, the DC voltage-regulated power supply circuit is used for providing a stable DC power supply for the signal converter, the signal output end of the signal converter is used for providing a control signal for the charge/discharge circuit, and the load of the charge/discharge circuit is an AC contactor. The current of the coil of the AC contactor can be changed through changing the pulse width of the output end of the signal converter, thereby realizing that the high current can flow through the coil of the AC contactor when the contacts of the AC contactor are closed, and the low current can flow through the coil of the AC contactor when the closed state of the contacts of the AC contactor is maintained. Therefore, the invention realizes the energy-saving operation of the AC contactor, reduces the noise and the temperature rise of the coil of the AC contactor, and prolongs the service life of the AC contactor.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an energy saver for an AC contactor. Background technique [0002] The AC contactor is a low-voltage electrical appliance widely used in industrial production. It is mainly used to control the operation and stop of electrical equipment such as motors. After the ordinary AC contactor is closed, the coil of the AC contactor is still connected with AC , The power consumption caused by iron loss and copper loss is very large, so the coil generates heat and noise, which not only wastes electric energy, but also the insulation of the coil is easy to age, which shortens the life of the AC contactor. In the environment of energy saving and emission reduction, reducing the energy consumption of AC contactors has significant economic and social benefits. [0003] Most of the AC contactor energy savers on the market are implemented by single-chip microcomputers, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/02H01H50/00
Inventor 彭成韩雁范镇淇
Owner ZHEJIANG UNIV
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