The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2019
Filed:
Jul. 23, 2015
Seari Electric Technology Co., Ltd., Shanghai, CN;
Zhejiang Chint Electrics Co., Ltd., Yueqing, CN;
Fei Yu, Shanghai, CN;
Changxun Gu, Shanghai, CN;
Shunfeng Ge, Shanghai, CN;
Di Zhang, Shanghai, CN;
Yugang Feng, Shanghai, CN;
Yawen Shi, Shanghai, CN;
Ping Zeng, Shanghai, CN;
SEARI ELECTRIC TECHNOLOGY CO., LTD., Shanghai, CN;
ZHEJIANG CHINT ELECTRICS CO., LTD., Yueqing, CN;
Abstract
A controller for an alternating current contactor includes: a filtering and rectification circuit that filters and rectifies external alternating current; an electromagnet component driven by an output of the filtering and rectification circuit that performs actions of attraction, holding or releasing; a power transistor circuit connected to the electromagnet component; and a microcontroller that controls the power transistor circuit to control the actions performed by the electromagnet component. The controller further includes a voltage control loop that provides a voltage feedback signal and a current control loop that provides a current feedback signal to the microcontroller. The microcontroller generates a control signal according to the voltage feedback signal. The control signal is a PWM control signal having different duty cycles during the attraction and holding of the electromagnet component so that the current does not exceed a predetermined current threshold during the attraction and bolding of the electromagnet component.