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Patent Searching and Data


Title:
MOTOR WITH BRAKE, AND ELEVATOR DRIVE SYSTEM USING THE MOTOR
Document Type and Number:
WIPO Patent Application WO/2007/083754
Kind Code:
A1
Abstract:
A motor with a brake comprises two electromagnetic brake mechanisms (8a, 8b) installed around a rotating shaft (4). The electromagnetic brake mechanisms (8a, 8b) comprise disk bodies (14a, 14b) rotating integrally with the rotating shaft (4), movable members (13a, 13b) approaching and separating from the disk bodies (14a, 14b), and electromagnets (12a, 12b) having coils (11a, 11b) and moving the movable members (13a, 13b) by generating electromagnetic forces through the energization of the coils (11a, 11b). Currents in the directions reverse to each other for the electromagnets (12a, 12b) flow through the coils (11a, 11b) of the electromagnets (12a, 12b) to drive the electromagnets (12a, 12b). Consequently, the reliability of the motor can be increased by accurately reducing, by a simple means, a magnetic flux leaking into and outside the motor when the currents flow through the coils (11a, 11b) of the electromagnetic brake mechanisms (8a, 8b) without requiring a costly mechanical modification.

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Inventors:
ITO HIROAKI (JP)
KAWASAKI KAN (JP)
Application Number:
PCT/JP2007/050814
Publication Date:
July 26, 2007
Filing Date:
January 19, 2007
Export Citation:
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Assignee:
TOSHIBA ELEVATOR KK (JP)
ITO HIROAKI (JP)
KAWASAKI KAN (JP)
International Classes:
B66B11/08; F16D51/10; F16D55/06; F16D55/28; F16D65/18; F16D65/22; H02K7/102
Foreign References:
JPS57168966U1982-10-25
JPH0674066U1994-10-18
JP2001151442A2001-06-05
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (1-12-9 Toranomo, Minato-ku Tokyo 01, JP)
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