Title:
BRUSHLESS DC MOTOR, AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2012/063401
Kind Code:
A1
Abstract:
This brushless DC motor (1) is provided with a stator (3) having a main body (312, 322) disposed on both ends thereof in the rotational axis direction with a single exciting coil (2) disposed between the main bodies (312, 322), and with a rotor (4) disposed in the interior of the stator (3), wherein main body (312) is formed with a first magnetic core (31) and main body (322) is formed with a second magnetic core (32), the magnetic cores (31, 32) functioning as a magnetic pole and having protrusions (311, 321), the quantity of which being different for each magnetic core (31, 32). The brushless DC motor (1) uses, as the driving force, the variation in the magnetic resistance between the stator (3) and the rotor (4) in relation to the flow of the magnetic flux generated in the periphery of the exciting coil (2). The method for controlling the brushless DC motor (1) of the present invention is a method for controlling the abovementioned brushless DC motor (1) in which starting coils (5 (5a, 5b)) each having a rectifier cell (52 (52a, 52b)) are disposed on the periphery of protrusion (321), wherein the rectifier cells (52) of the starting coils (5) impart, to the exciting coil (2), a pulse current having a polarity corresponding to the intended rotational direction, and having a start-up time and wave height that are sufficient for turning on.
Inventors:
MIYAMURA TAKEO
INOUE KENICHI
TSUTSUI AKIRA
HASHIMOTO HIROSHI
MITANI HIROYUKI
ZAITSU KYOJI
INOUE KENICHI
TSUTSUI AKIRA
HASHIMOTO HIROSHI
MITANI HIROYUKI
ZAITSU KYOJI
Application Number:
PCT/JP2011/005593
Publication Date:
May 18, 2012
Filing Date:
October 04, 2011
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
MIYAMURA TAKEO
INOUE KENICHI
TSUTSUI AKIRA
HASHIMOTO HIROSHI
MITANI HIROYUKI
ZAITSU KYOJI
MIYAMURA TAKEO
INOUE KENICHI
TSUTSUI AKIRA
HASHIMOTO HIROSHI
MITANI HIROYUKI
ZAITSU KYOJI
International Classes:
H02K1/02; H02K19/10; H02K1/06; H02K19/12; H02P25/08; H02P29/50
Foreign References:
| JP2008206292A | 2008-09-04 | |||
| JPH07203645A | 1995-08-04 | |||
| JPH0332346A | 1991-02-12 | |||
| JPS63144734A | 1988-06-16 | |||
| JPH08207893A | 1996-08-13 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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Claims:
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