Title:
単相誘導モータの起動回路
Document Type and Number:
Japanese Patent JP4792826
Kind Code:
B2
Abstract:
A starting circuit for a single-phase induction motor includes a motor starting positive characteristic thermistor and a triac arranged in a series connection, and a triac control positive characteristic thermistor connected in parallel with the motor starting positive characteristic thermistor, and including one terminal thereof connected to a gate of the triac. The triac control positive characteristic thermistor has a volume in the range of about 4.5 mm3 to about 30 mm3. The relationship of (√2xVxsin 45°)/R>=I is maintained with the triac control positive characteristic thermistor within an operating temperature range, where V represents a root-mean-square value of a power source voltage, R represents a resistance of the triac control positive characteristic thermistor, and I represents a gate turn-on current of the triac. The gate turn-on current I at an operating temperature of about 25° C. is about 20 mA or less.
Inventors:
Yutaka Ikeda
Hiroki Tanaka
Toshiharu Hirota
Hiroki Tanaka
Toshiharu Hirota
Application Number:
JP2005175266A
Publication Date:
October 12, 2011
Filing Date:
June 15, 2005
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H02P1/42; H02P21/34; H02P23/00; H02P23/07; H02P25/04; H02P27/02
Domestic Patent References:
| JP6339291A | ||||
| JP6311769A | ||||
| JP7123759A | ||||
| JP9285168A | ||||
| JP8154367A | ||||
| JP5033692U | ||||
| JP7264887A |