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Patent Searching and Data


Title:
FAN DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/038578
Kind Code:
A1
Abstract:
This fan device comprises an electric rotating body drive circuit provided with a circuit unit which generates a drive signal for an electric rotating body, an output stage provided with an upper-stage side MOSFET and a lower-stage side MOSFET, and a motor unit driven by the output stage, the fan device being further provided with: an inverse electromotive force supply unit which, with respect to a brake-side MOSFET which is one of the upper-stage side MOSFET and the lower-stage side MOSFET and a non-brake side MOSFET which is the other thereof, supplies the brake-side MOSFET with power resulting from an inverse electromotive force produced by the rotation of the motor unit, in state in which no power supply voltage for the electric rotating body is being supplied; and an electromagnetic brake unit which, using the power supplied by the inverse electromotive force supply unit, performs electromagnetic braking of the motor unit by turning on the brake-side MOSFET.

Inventors:
OTSUKA,Motoi (3-93 Aioi-cho, Kiryu-sh, Gunma 11, 〒3760011, JP)
Application Number:
JP2016/074653
Publication Date:
March 09, 2017
Filing Date:
August 24, 2016
Export Citation:
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Assignee:
NIDEC SERVO CORPORATION (3-93, Aioi-cho Kiryu-sh, Gunma 11, 〒3760011, JP)
International Classes:
H02P3/22; F04D25/06
Foreign References:
JP2009213234A2009-09-17
JP2009131105A2009-06-11
JPH06335273A1994-12-02
JP2013146142A2013-07-25
JP2004343988A2004-12-02
Other References:
See also references of EP 3346599A4
Attorney, Agent or Firm:
KITAMURA, Hideaki (338 Kuzetonoshiro-cho, Minami-ku Kyoto-sh, Kyoto 05, 〒6018205, JP)
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