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:
Dec. 10, 2019
Filed:
Feb. 27, 2017
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
In one implementation, a motor module according to the present invention includes: a motor driving circuitto drive a motor M; and a position estimation deviceto output an estimated position signal of a rotor R of the motor M. It also includes: a motor control circuitto supply a command voltage value to the motor driving circuitin response to a pulse signal; and a variable step-size memorystoring variable step-size information, which defines an amount of displacement of the rotor R per pulse of the pulse signal. The estimated position signal is an analog or digital signal. Upon receiving a pulse signal, the motor control circuitdetermines the command voltage value based on an estimated position value of the rotor R acquired from the position estimation deviceand the variable step-size information read from the variable step-size memory. The motor driving circuitchanges the position of the rotor R based on the command voltage value.