Title:
BRUSHLESS DC MOTOR THAT STARTS STABLY
Document Type and Number:
WIPO Patent Application WO/1996/009689
Kind Code:
A1
Abstract:
In a synchronous operation condition in which the voltage and frequency of inverter output are increased at the time of the start, a V/F pattern setting unit (44) outputs a voltage instruction signal to the PWM unit (54) so as to lower the inverter output voltage either if a voltage signal detector (41) detects a signal below a predetermined level or if a mode comparator (42) indicates no predetermined relationship between the position signal and the inverter mode. If the signal detected by the detector (41) is at the predetermined level and a fixed relation is found between the position signal and the inverter mode, on the other hand, a position detection operation switching unit (43) changes the operation switch SW over to the side of position detection operation from the side of synchronous operation.
More Like This:
| JPH11252990 | PWM-TYPE MOTOR CONTROLLER |
| JPH08317685 | INVERTER DEVICE |
Inventors:
KIMURA TAIZOU (JP)
Application Number:
PCT/JP1995/001794
Publication Date:
March 28, 1996
Filing Date:
September 11, 1995
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
KIMURA TAIZOU (JP)
KIMURA TAIZOU (JP)
International Classes:
H02P6/06; H02P6/18; H02P6/08; H02P6/17; H02P6/182; H02P6/21; (IPC1-7): H02P6/20
Foreign References:
| JPH04304193A | 1992-10-27 | |||
| JPH05219784A | 1993-08-27 |
Other References:
See also references of EP 0735663A4
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