Title:
MOTOR CURRENT CONTROL DEVICE AND MOTOR CURRENT CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2016/104737
Kind Code:
A1
Abstract:
This motor current control device has an inexpensive configuration and enhances motor current target value tracking. This motor current control device has an H bridge circuit that has a switching element and is connected to a motor coil provided in a motor, and a control means that drives the switching element at each prescribed PWM period and specifies an operation mode for the H bridge circuit from among a charge mode for increasing the motor current (Icoil) flowing through the motor coil, a high-speed attenuation mode for attenuating the motor current, and a low-speed attenuation mode. In each PWM period, the control means selects one of the operation modes on the basis of the result of comparing the motor current and a current reference value (Iref) before the time that has passed from the start of the PWM period reaches a prescribed current control re-execution time (Tr) and selects one of the operation modes on the basis of the result of comparing the motor current and the current reference value after the time that has passed reaches the current control re-execution time.
Inventors:
HIJIKATA HIDETOSHI (JP)
Application Number:
PCT/JP2015/086310
Publication Date:
June 30, 2016
Filing Date:
December 25, 2015
Export Citation:
Assignee:
MINEBEA CO LTD (JP)
International Classes:
H02P8/22; H02P29/00
Foreign References:
| JP2014053997A | 2014-03-20 | |||
| JP2011078301A | 2011-04-14 | |||
| US6119046A | 2000-09-12 |
Attorney, Agent or Firm:
HIBIYA Yukihiko et al. (JP)
Hibiya Masahiko (JP)
Hibiya Masahiko (JP)
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