发明名称 |
CONTROLLER AND CONTROL METHOD FOR ALTERNATING CURRENT CONTACTOR |
摘要 |
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. |
申请公布号 |
CA2956170(A1) |
申请公布日期 |
2016.02.04 |
申请号 |
CA20152956170 |
申请日期 |
2015.07.23 |
申请人 |
ZHEJIANG CHINT ELECTRICS CO., LTD.;SEARI ELECTRIC TECHNOLOGY CO., LTD. |
发明人 |
YU, FEI;GU, CHANGXUN;GE, SHUNFENG;ZHANG, DI;FENG, YUGANG;SHI, YAWEN;ZENG, PING |
分类号 |
H01H47/02 |
主分类号 |
H01H47/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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