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:
Jul. 04, 2017
Filed:
May. 07, 2015
Johnson Controls Technology Company, Holland, MI (US);
Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd., Wuxi, Jiangsu, CN;
York Guangzhou Air Conditioning and Refrigeration Co., Ltd., Guangdong, CN;
Chenyi Jiang, Jiangsu, CN;
JOHNSON CONTROLS TECHNOLOGY COMPANY, Holland, MI (US);
JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD., Wuxi, Jiangsu, CN;
YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION CO., LTD., Guangdong, CN;
Abstract
An over-current protection method and circuit for a DC Inverter is provided in the present invention. Said over-current protection circuit comprises: a sampling unit for sampling output currents from a power module to form a sampling signal; a signal-processing unit for amplifying with various magnification factors and low-pass filtering the sampling signal to generate a first over-current signal and a second over-current signal; a signal-generating unit for generating a first interrupt trigger signal based on the first over-current signal; a comparison unit for comparing the second over-current signal with a reference voltage corresponding to an over-current threshold of a motor, with a comparison result being a second interrupt trigger signal; and a control unit for controlling the power module based on the first interrupt trigger signal, and the motor based on the second interrupt trigger signal. The over-current protection method and circuit provided in the present invention are able to satisfy over-current protection of the power module and the motor of the inverter simultaneously.