Title:
DC MOTOR DRIVE CIRCUIT, DRIVE METHOD, AND ELECTRONIC DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP2019088062
Kind Code:
A
Abstract:
To provide a drive circuit capable of applying a short brake properly.SOLUTION: A first detection circuit 410 generates a position command value P_TGT indicating the target position of a rotor and a speed command value V_TGT indicating the target rotation speed on the basis of a clock signal CLK. A second detection circuit 420 generates a position detection value P_FB indicating the current position of the rotor and a speed detection value V_FB indicating the current rotation speed on the basis of pulse signals EN_A and EN_B from an encoder. A feedback controller 330 generates a torque command value T_REF such that the position detection value P_FB approaches the position command value P_TGT. When the position detection value P_FB is larger than the position command value P_TGT and the torque command value T_REF is negative, a brake controller 430 applies a short brake.SELECTED DRAWING: Figure 13
Inventors:
HASHIMOTO HIROKI
DOBASHI MASANORI
DOBASHI MASANORI
Application Number:
JP2017213090A
Publication Date:
June 06, 2019
Filing Date:
November 02, 2017
Export Citation:
Assignee:
ROHM CO LTD
International Classes:
H02P6/16; H02P3/06; H02P3/22; H02P6/24
Domestic Patent References:
| JP2016123269A | 2016-07-07 | |||
| JP2008043058A | 2008-02-21 | |||
| JP2011176942A | 2011-09-08 | |||
| JP6157770B1 | 2017-07-05 | |||
| JP2015167469A | 2015-09-24 | |||
| JP2004085838A | 2004-03-18 | |||
| JP2004085383A | 2004-03-18 | |||
| JP2010049208A | 2010-03-04 |
Foreign References:
| WO2017154476A1 | 2017-09-14 | |||
| WO2017179337A1 | 2017-10-19 |
Attorney, Agent or Firm:
Sakaki Morishita
Masaki Taiki
Masaki Taiki