Title:
PWM INVERTER APPARATUS
Document Type and Number:
WIPO Patent Application WO/1985/002505
Kind Code:
A1
Abstract:
A PWM inverter apparatus controls the rotational speed of a motor (9) by setting the carrier frequency of a PWM-generated voltage at between 8 kHz to 16 kHz, to limit electric noise generated to within the non-audible range. A control circuit section (2) is provided with a triangular wave oscillator (11) which varies the frequency in accordance with a signal from a frequency setting section (1), so as to control the rotational speed of the motor (9) so that the level of electric noise generated can be reduced to a desirable value.
Inventors:
YAMANE SHIGEKI (JP)
MORI KEIJIRO (JP)
SAKAMOTO KYOOYA (JP)
MORI KEIJIRO (JP)
SAKAMOTO KYOOYA (JP)
Application Number:
PCT/JP1984/000558
Publication Date:
June 06, 1985
Filing Date:
November 22, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
MATSUSHITA SEIKO KK (JP)
MATSUSHITA SEIKO KK (JP)
International Classes:
H02M7/5395; (IPC1-7): H02M7/48; H02P7/63
Foreign References:
| JPS5543916A | 1980-03-28 |
Other References:
KAMIYAMA TADAHIKO "New Drive Electronics" 25. July 1982 (25.07.82) Denki Syoin p. 68, 65
See also references of EP 0163746A4
See also references of EP 0163746A4
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