Patent ID: 6094019
Filing Date: 2000-07-25
Classification: H02P

Abstract:
A motor drive circuit comprising:two sets of relay circuits including power source circuit side relays and motor circuit side relays, the common contacts of said power source circuit side relays and side motor circuit side relays being connected, the positive side of a DC power source being connected to the normally open contacts of two power source circuit side relays, while the negative side of the DC power source being connected to the normally closed contact to said two power source circuit side relays;a first motor connected between the normally closed contacts of two motor circuit side relays;a second motor connected between the normally closed contact of one relay and the normally open contact of the other relay;a third motor connected between the normally open contact of said one relay and the normally closed contact of said other relay; anda fourth motor connected between the normally open contacts of said two motor circuit side relays.