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. 28, 2020
Filed:
Jul. 31, 2017
Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Limited, Foshan, CN;
Midea Group Co., Ltd., Foshan, CN;
Zhicai Liu, Foshan, CN;
Zhifeng Wang, Foshan, CN;
Wenfeng Weng, Foshan, CN;
Dali Ou, Foshan, CN;
Zhihai Ma, Foshan, CN;
Shirun Wu, Foshan, CN;
Yifan Chen, Foshan, CN;
Xinyuan Wang, Foshan, CN;
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING CO., LTD, Foshan, CN;
MIDEA GROUP CO., LTD., Foshan, CN;
Abstract
Disclosed is an electromagnetic heating control circuit, comprising a control chip, a rectifier filter circuit, a resonant capacitor, a switching transistor, a drive circuit, and a synchronous voltage detection circuit. The switching transistor comprises a first end, a second end, and a control end. The first end is connected to a positive output end of the rectifier filter circuit by using the resonant capacitor. The second end is connected to a negative output end of the rectifier filter circuit by using a current limiting resistor. The control chip comprises a positive phase voltage input end, a negative phase voltage input end, a voltage detection end, and a signal input end. The positive phase voltage input end and the negative phase voltage input end detect voltages at two ends of the resonant capacitor by using the synchronous voltage detection circuit. The signal output end is connected to the control end by using the drive circuit. The voltage detection end is connected to the positive output end of the rectifier filter circuit by using the synchronous voltage detection circuit. The control chip controls a working state of the switching transistor according to a voltage detected by the voltage detection end. Further disclosed is an electromagnetic heating device.