Title:
PHASE-SHIFT DETECTION DEVICE, MOTOR DRIVE DEVICE, BRUSHLESS MOTOR, AND PHASE-SHIFT DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/008107
Kind Code:
A1
Abstract:
Disclosed is a phase-shift detection circuit that detects a phase shift in motor driving by employing a pulse-shaped position detection signal (Rd) which is based on a sensor signal (Hs) from a position sensor arranged on the motor, and a measurement signal (Ms) which is based on the induced voltage of a coil, the phase-shift detection circuit including: a level-difference calculating section that calculates the difference in level between the level of the measurement signal (Ms) at the rising timing of the position detection signal (Rd) and the level of the measurement signal (Ms) at the falling timing; and a phase-shift calculating section that calculates the amount of phase shift on the basis of the difference in level.
Inventors:
KISHIMOTO, Kenichi (())
岸本 憲一 (())
ISODA, Mineaki (())
磯田 峰明 (())
岸本 憲一 (())
ISODA, Mineaki (())
磯田 峰明 (())
Application Number:
JP2011/003747
Publication Date:
January 19, 2012
Filing Date:
June 30, 2011
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
KISHIMOTO, Kenichi (())
岸本 憲一 (())
ISODA, Mineaki (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
KISHIMOTO, Kenichi (())
岸本 憲一 (())
ISODA, Mineaki (())
International Classes:
H02P6/16; H02P6/18
Attorney, Agent or Firm:
NAITO, Hiroki et al. (1006 Oaza Kadoma, Kadoma-sh, Osaka 01, 〒5718501, JP)
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Claims: