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Patent Searching and Data


Title:
MOTOR DRIVE CIRCUIT, METHOD, AND COOLING DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/066625
Kind Code:
A1
Abstract:
A drive signal generation circuit (1) generates drive signals SDH, SDL for controlling ON/OFF of a transistor of an H-bridge circuit (110) in accordance with a torque target value. According to the drive signals SDH, SDL outputted from the drive signal generation circuit (1), a driver circuit (3) alternately turns ON/OFF a high-side transistor MH and a low-side transistor ML of the H-bridge circuit (110). When a motor stop is instructed, the driver circuit (3) immediately turns off the high-side transistor MH1, MH2 and turns off the low-side transistor ML1, ML2 with a predetermined delay time τd.

Inventors:
HAYASHI HIROAKI (JP)
SATAKE TOSHIKAZU (JP)
Application Number:
PCT/JP2006/324190
Publication Date:
June 14, 2007
Filing Date:
December 04, 2006
Export Citation:
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Assignee:
ROHM CO LTD (JP)
HAYASHI HIROAKI (JP)
SATAKE TOSHIKAZU (JP)
International Classes:
H02P7/06; H02P7/28
Foreign References:
JPH0723589A1995-01-24
JP2002199785A2002-07-12
JP2005082968A2005-03-31
JP2005080492A2005-03-24
JP2004208442A2004-07-22
Attorney, Agent or Firm:
MORISHITA, Sakaki (Ebisu-Nishi Shibuya-ku, Tokyo 21, JP)
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