Title:
CONTROLLER AND CONTROL METHOD FOR ALTERNATING CURRENT CONTACTOR
Document Type and Number:
WIPO Patent Application WO/2016/015590
Kind Code:
A1
Abstract:
A controller for an alternating current contactor. The controller comprises: a filtering and rectification circuit (101, 102), which filters and rectifies external alternating current; an electromagnet component (103), which is driven by the output of the filtering and rectification circuit and performs an attraction, holding or releasing action; a power transistor circuit (104), which is connected to the electromagnet component; and a microcontroller (112), which controls on or off of the power transistor circuit to control the electromagnet component to perform the attraction, holding or releasing action. The controller further comprises: a voltage control loop, which provides a voltage feedback signal to the microcontroller so that the microcontroller generates a control signal according to the voltage feedback signal, wherein 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 holding of the electromagnet component; and a current control loop, which provides a current feedback signal to the microcontroller so that the microcontroller turns off the power transistor circuit upon detecting an overcurrent exceeding the current threshold.
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Inventors:
YU FEI (CN)
GU CHANGXUN (CN)
GE SHUNFENG (CN)
ZHANG DI (CN)
FENG YUGANG (CN)
SHI YAWEN (CN)
ZENG PING (CN)
GU CHANGXUN (CN)
GE SHUNFENG (CN)
ZHANG DI (CN)
FENG YUGANG (CN)
SHI YAWEN (CN)
ZENG PING (CN)
Application Number:
PCT/CN2015/084895
Publication Date:
February 04, 2016
Filing Date:
July 23, 2015
Export Citation:
Assignee:
SEARI ELECTRIC TECHNOLOGY CO LTD (CN)
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
ZHEJIANG CHINT ELECTRICS CO LTD (CN)
International Classes:
H01H47/02
Foreign References:
CN102315043A | 2012-01-11 | |||
CN101261908A | 2008-09-10 | |||
CN102163518A | 2011-08-24 | |||
US20040207377A1 | 2004-10-21 | |||
JP2009289690A | 2009-12-10 |
Other References:
See also references of EP 3176803A1
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
上海专利商标事务所有限公司 (CN)
上海专利商标事务所有限公司 (CN)
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