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:
May. 22, 2012
Filed:
Sep. 24, 2009
Tiecai LI, Shenzhen, CN;
Zhaoyong Zhou, Shenzhen, CN;
Yamei Qi, Shenzhen, CN;
Xiang Kong, Shenzhen, CN;
Shuang Wang, Shenzhen, CN;
Pinghua Tang, Shenzhen, CN;
Tiecai Li, Shenzhen, CN;
Zhaoyong Zhou, Shenzhen, CN;
Yamei Qi, Shenzhen, CN;
Xiang Kong, Shenzhen, CN;
Shuang Wang, Shenzhen, CN;
Pinghua Tang, Shenzhen, CN;
Shenzhen Academy of Aerospace Technology, Shenzhen, CN;
Abstract
The present invention relates to a control technology of a three-phase DC motor. In order to resolve a problem in the prior art that the good current closed-loop control has not been realized on a three-phase square-wave brushless DC motor, the present invention provides a brushless DC motor control system, wherein cathodes of freewheel diodes D, Dand Dare independent of input terminals of their respective switch tubes and connected in parallel to a sampling coil L, and anodes of freewheel diodes D, Dand Dare independent of output terminals of their respective switch tubes and connected in parallel to a sampling coil L. The present invention can use a single resultant current sensor to completely and continuously sample the three-phase current existing during the motor is on and performs current freewheel, and perform the continuous closed-loop control on the three-phase current with a single current closed-loop regulator, thereby increasing dynamic and static indexes of the motor significantly.