Title:
VOLTAGE TYPE ELECTRONIC RELAY FOR STARTING SINGLE-PHASE INDUCTION MOTOR
Document Type and Number:
Japanese Patent JP3847700
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a voltage type electronic relay for starting a single-phase induction motor.
SOLUTION: A power source 310 made up of a bridge diode BD to supply power when AC power is turned on; a triode AC switch (TRIAC) 306 applying/ interrupting the AC power; a signal input 322 sensing voltage induced in a starter coil; a hysteresis part 324 outputting an on-control signal at initial start time to generate an off-control signal for turning off the TRIAC when the induced voltage input through the signal input part reaches prescribed off- reference voltage, and to generate the on-control signal for again turning on the TRIAC when the induced voltage is decreased to prescribed on-reference voltage or less during the time of normal operation; and a trigger part 330 turning on the TRIAC by the on-control signal and turning off the TRIAC by the off-control signal of the hysteresis part 324, are included.
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Inventors:
Gold and tin
Gold dredging
Gold dredging
Application Number:
JP2002319438A
Publication Date:
November 22, 2006
Filing Date:
November 01, 2002
Export Citation:
Assignee:
Gold and tin
Gold dredging
Gold dredging
International Classes:
H02P1/42; H02P1/44; H01H47/00; H02P21/05; H02P21/34; H02P23/04; H02P23/07; H02P25/04; H02P27/02; (IPC1-7): H02P1/42; H02P5/402
Domestic Patent References:
| JP2131380A |
Foreign References:
| US4782278 | ||||
| US5296795 | ||||
| GB2175463A | ||||
| US3671830 |
Attorney, Agent or Firm:
Yukio Murata
Masaaki Ban
Masaaki Ban