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. 11, 2017
Filed:
Sep. 09, 2014
Harbin Institute of Technology, Harbin, CN;
Liyi Li, Harbin, CN;
Donghua Pan, Harbin, CN;
Qingbo Guo, Harbin, CN;
Chengming Zhang, Harbin, CN;
Jiwei Cao, Harbin, CN;
HARBIN INSTITUTE OF TECHNOLOGY, Harbin, CN;
Abstract
A thrust compensation system of a dual-winding voice coil motor, which is used for driving the voice coil motor having main windings () and secondary windings (), wherein the secondary windings () of the voice coil motor are between each pair of the main windings (). The system includes a switch drive circuit of the main windings () which is powered by a first controlled voltage source to drive the main windings () adopted as the main working windings of the voice coil motor and used for providing the output electromagnetic force required by the driving system of the voice coil motor in work; a switch drive circuit of the secondary windings () which is powered by a second voltage source to drive the secondary windings () adopted as compensation windings, and used for providing the thrust ripple opposite to the main windings () so as to compensate the thrust ripple of the main windings () and keep the resultant force of the output of the main windings () and the secondary windings () of the voice coil motor in constant; wherein the voltages Uand Uof the first and second controlled voltage sources of the main windings () and the second windings () are configured as meeting a certain relationship.