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Patent Searching and Data


Title:
CONTACTOR POWER SAVER
Document Type and Number:
WIPO Patent Application WO/2019/076091
Kind Code:
A1
Abstract:
Provided is a contactor power saver, comprising a main power circuit, a current sampling circuit, an error amplification circuit, and a PWM control circuit, wherein the current sampling circuit samples a voltage signal of the main power circuit, and outputs a current sampling signal; the error amplification circuit compares the current sampling signal with a reference voltage, and outputs an error voltage signal; and the PWM control circuit detects the error voltage signal, outputs a drive signal with a constant frequency and a duty ratio proportional to that of the error voltage signal, and controls the turning on and turning off of a switch tube in the main power circuit. According to the present invention, a power factor value can be increased to approximately 0.9, and current of a contactor coil is constant under a wide-range input voltage. Various modules of the control circuit may be integrated, the circuit is simple, and the cost is low.

Inventors:
YIN, Xiangyang (No. 5 Kehui St. 1, Kehui Development CenterScience Ave., Guangzhou Science City, Luogan, Guangzhou Guangdong 3, 510663, CN)
SU, Junxi (No. 5 Kehui St. 1, Kehui Development CenterScience Ave., Guangzhou Science City, Luogan, Guangzhou Guangdong 3, 510663, CN)
Application Number:
CN2018/094944
Publication Date:
April 25, 2019
Filing Date:
July 09, 2018
Export Citation:
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Assignee:
MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO., LTD. (No. 5 Kehui St. 1, Kehui Development CenterScience Ave., Guangzhou Science City, Luogan, Guangzhou Guangdong 3, 510663, CN)
SHENZHEN NANYUN MICROELECTRONICS CO., LTD (Unit 8G, Building A3 Pearl River Square,No. 9009, Longxiang Avenue,Longcheng Road, Longgang Distric, Shenzhen Guangdong 1, 518171, CN)
International Classes:
H01H47/02
Foreign References:
CN107658181A2018-02-02
CN103021735A2013-04-03
CN105162415A2015-12-16
CN105470046A2016-04-06
CH664232A51988-02-15
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (Room 2305-06, Yuehai Group Building555 Dong Feng Dong Road, Yuexiu Distric, Guangzhou Guangdong 0, 510050, CN)
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