MOTOR UNIT - NIDEC SERVO CORP

Title:

MOTOR UNIT

Document Type and Number:

WIPO Patent Application WO/2017/029925

Kind Code:

A1

Abstract:

A motor unit equipped with: a motor; a drive circuit; a shunt resistor; a rotation command input terminal; a pulse output terminal; a current detection unit that detects the drive current measured by the shunt resistor; a drive control unit that controls the supply of the drive current on the basis of the rotation command signal supplied to the rotation command input terminal; a storage unit in which permissible range information is stored in advance; a current value determination unit that determines, on the basis of the current value of the drive current and the permissible range information, whether the current value of the drive current is within the permissible range; and a signal generation unit that sets the duty ratio of a pulse signal to a first duty ratio when the current value determination unit determines that the current value of the drive current is within the permissible range, sets the duty ratio of the pulse signal to a second duty ratio different from the first duty ratio when the current value determination unit determines that the current value of the drive current is outside of the permissible range, and generates the pulse signal.

Inventors:

MIZUKAMI KOJI (JP)
ISHIKAWA MASATOMO (JP)

Application Number:

PCT/JP2016/071211

Publication Date:

February 23, 2017

Filing Date:

July 20, 2016

Export Citation:

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Assignee:

NIDEC SERVO CORP (JP)

International Classes:

H02P27/08

Foreign References:

JPH11103585A	1999-04-13
JP2015122883A	2015-07-02
JP2005237117A	2005-09-02
US20120181964A1	2012-07-19
US5343382A	1994-08-30

Other References: