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. 21, 2020
Filed:
Aug. 22, 2018
Zhejiang Holip Electronic Technology Co., Ltd., Haiyan, Zhejiang, CN;
Xiaoran Xu, Beijing, CN;
Zhejiang Holip Electronic Technology Co., Ltd., Haiyan, Zhejiang, CN;
Abstract
An optocoupler based control circuit and a method thereof are disclosed. The control circuit comprises a first control branch, which includes a first control signal input terminal configured to receive a first OFF function control signal; a first optocoupler, wherein a primary side of the first optocoupler is coupled to the first control signal input terminal, and an output of a secondary side of the first optocoupler is configured to control a first power supplied to a motor driving circuit; a first primary side on/off control circuit connected to the primary side of the first optocoupler, and configured to periodically turn on and off the coupling of the primary side to the first control signal input terminal; and a first secondary side filter circuit connected to the secondary side of the first optocoupler, and configured to filter the output of the secondary side, and configured as a low pass filter having a cutoff frequency lower than an on/off frequency of the primary side. The control circuit further comprises a diagnostic circuit configured to diagnose an operating state of the control circuit based on the output of the secondary side of the first optocoupler and the first power. The control circuit may be a Safe Torque Off (STO) circuit.