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Patent Searching and Data


Title:
MOTOR DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/148427
Kind Code:
A1
Abstract:
Provided is a motor drive device capable of reducing the loss between a drive power source and a control device. The motor drive device (6) comprises: a plurality of motors (4), a single drive power source (7) for driving these motors (4); and a control device (8) for controlling the energization time of the motor coils of the plurality of motors (4) using a PWM drive method. The control device (8) includes a phase shift means (10a) which creates for each motor a different phase for the PWM signal used for flowing current in the motor (4). By creating for each motor a different phase for a PWM signal used for flowing current in the motor (4), the phase shift means (10a) prevents a so-called overlap in the energization time of the currents.

Inventors:
MASUDA YUI (JP)
Application Number:
PCT/JP2014/057125
Publication Date:
September 25, 2014
Filing Date:
March 17, 2014
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
MASUDA YUI (JP)
International Classes:
H02P27/06; H02P5/46; H02P6/06; H02P6/08; H02P25/022; H02P25/22; H02P27/08
Foreign References:
JP2010076752A2010-04-08
JP2010016981A2010-01-21
JPH01318598A1989-12-25
JP2007216930A2007-08-30
Other References:
See also references of EP 2978125A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)
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