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. 31, 2022
Filed:
Dec. 07, 2018
Sanden Automotive Components Corporation, Isesaki, JP;
Junki Kawata, Isesaki, JP;
SANDEN AUTOMOTIVE COMPONENTS CORPORATION, Isesaki, JP;
Abstract
The present invention quickly stops rotation of an electric compressor while preventing damage to switching elements. An electric compressorcomprises a motor drive circuithaving multiple switching elements IGBT Qto Q, a control unitthat controls driving of the multiple switching elements IGBT Qto Qand drives a motor, and a current detection unitthat detects a current flowing through the motor drive circuit. The control unitperforms stop control that stops rotation of the compression mechanismby performing braking control that controls drive of predetermined switching elements IGBT (Q, Q, Qand the like) among the multiple switching elements IGBT Qto Q. In the brake control, when the detected current value I is lower than the first threshold I, the control unitadjusts the drive pattern of the predetermined switching elements IGBT (Q, Q, Qand the like) in order to prevent the detected current value I from exceeding the second threshold Ithat is lower than the first threshold I.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile