Title:
SYSTEM FOR DRIVING SYNCHRONOUS MOTORS WITH BUILT-IN PERMANENT MAGNETS
Document Type and Number:
WIPO Patent Application WO/2004/088833
Kind Code:
A1
Abstract:
A system for driving synchronous motors (10) with built-in permanent magnets connected in parallel and operated by one inverter (9), characterized in that each synchronous motor (10) comprises a winding changing device (14) composed of a switch (12) for switching the synchronous motor (10) through the inverter and a winding changer (11) for changing the connection of the windings of an armature from one of the star connection and the delta connection to the other according to the opened/closed state of the switch (12) and in that the winding changing device (14) of each synchronous motor is disposed between the synchronous motor and the inverter (9).
Inventors:
MAEMURA AKIHIKO (JP)
ARITA HIDEHITO (JP)
ARITA HIDEHITO (JP)
Application Number:
PCT/JP2004/004366
Publication Date:
October 14, 2004
Filing Date:
March 26, 2004
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
MAEMURA AKIHIKO (JP)
ARITA HIDEHITO (JP)
MAEMURA AKIHIKO (JP)
ARITA HIDEHITO (JP)
International Classes:
H02P1/32; H02K21/14; H02K21/46; H02P1/50; H02P1/54; H02P5/74; H02K3/28; H02K11/00; (IPC1-7): H02P7/74; H02K21/46
Foreign References:
| JP2000166294A | 2000-06-16 | |||
| JP2003052186A | 2003-02-21 | |||
| JPH0677495U | 1994-10-28 |
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