Relay driving apparatus for microwave oven and method thereof

Details Relay driving apparatus for microwave oven and method thereof Relay driving apparatus for microwave oven and method thereof

1995-12-28

1998-07-07

Leung, Philip H.

Electric heating

Microwave heating

With control system

219716, 219722, 363 49, H05B 668

Patent

active

057773017

ABSTRACT:
In a relay driving apparatus and method for a microwave oven, a high relay driving voltage is applied at an initial relay driving time to reduce the operating time deviation between relay parts and the high relay driving voltage is lowered to a normal relay driving voltage through a damp resistance if contact points of a relay switch are coupled, thereby implementing a fix crossing. Therefore, rush current is minimized during relay operation, thereby preventing the fixation of the contact points of a relay switch and the generation of noises due to vibration.

REFERENCES:
patent: 4719326 (1988-01-01), Yoo
patent: 4720762 (1988-01-01), Estes
patent: 4787008 (1988-11-01), Graff et al.
patent: 4967051 (1990-10-01), Maehara et al.
patent: 5286938 (1994-02-01), Takei et al.
patent: 5317115 (1994-05-01), Forsberg
patent: 5357087 (1994-10-01), Choi
patent: 5595674 (1997-01-01), Kim
Patent Abstracts Of Japan, vol. 0 17, No. 579 (E-1451) 21 Oct. 1993; JP-A-05 174964, Jul. 13, 1993.

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