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:
Mar. 19, 2002
Filed:
Sep. 20, 2000
Kentaro Suzuki, Hachioji, JP;
Hiroshi Uchino, Hachioji, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A synchronous motor controller comprises speed control means for calculating an active current reference value on a basis of a deviation of a speed sensed value from a speed reference value of the synchronous motor, three-phase PQ conversion means for calculating an active current value and reactive current value on a basis of an armature current of the synchronous motor and a voltage phase reference value active current control means for calculating a voltage phase compensating value on a basis of a deviation of the active current value from the active current reference value, voltage phase computing means for calculating the voltage phase reference value and polar-coordinate three-phase conversion means for calculating a three-phase voltage reference value on a basis of the voltage phase reference value and a voltage amplitude reference value.