MOTOR APPARATUS CAPABLE OF OBTAINING HIGH EFFICIENCY AND MOTOR CONTROL METHOD

Title:

MOTOR APPARATUS CAPABLE OF OBTAINING HIGH EFFICIENCY AND MOTOR CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/1996/003797

Kind Code:

A1

Abstract:

The effective input current to a voltage type inverter (702) is detected by an effective value detection circuit (706), so that the rotational speed of a brushless D.C. motor (703) is detected on the basis of the cycle of a position signal outputted from a position detection circuit (704). In response to the effective input current and the motor speed, the phase of the inverter output voltage with respect to the motor counterelectromotive force is determined to maximize motor efficiency, and thus a switching instruction to the voltage type inverter (702) is generated. According to this construction, a high efficiency operation can be accomplished without increasing the cost and moreover, irrespective of a load condition, when the voltage waveform of the input to the brushless D.C. motor (703) is controlled by only the voltage type inverter in response to a position detection signal of a rotor.

Inventors:

KIMURA TAIZOU (JP)
NISHIJIMA KIYOTAKA (JP)
YAMAI HIROYUKI (JP)
YAMAGIWA AKIO (JP)
OOYAMA KAZUNOBU (JP)
KITANO NOBUKI (JP)

Application Number:

PCT/JP1995/001468

Publication Date:

February 08, 1996

Filing Date:

July 24, 1995

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
KIMURA TAIZOU (JP)
NISHIJIMA KIYOTAKA (JP)
YAMAI HIROYUKI (JP)
YAMAGIWA AKIO (JP)
OYAMA KAZUNOBU (JP)
KITANO NOBUKI (JP)

International Classes:

H02P6/08; H02P6/16; (IPC1-7): H02P6/08

Foreign References:

JPH02299496A	1990-12-11
JPH05122983A	1993-05-18
JPH04156292A	1992-05-28
JPH0458782A	1992-02-25
JPH03253291A	1991-11-12
JPS58198187A	1983-11-18
JPS6260491A	1987-03-17

Other References: