| 摘要 |
#CMT# #/CMT# The device has a door locking element (10) and a drive motor circuit (20) attached to power lines (L, N) via a common switch (3) i.e. Triac. The door locking element is connected with the switch via a field winding (24) and a commutating throttle of the drive motor circuit. An armature (22) of the drive motor of the drive motor circuit is connected with the power lines via two reversing relays (21, 23). The field winding of the drive motor of the drive motor circuit is coupled with a field change-over relay (25) and an element for shortening of the field effect. #CMT#USE : #/CMT# Laundry treatment device i.e. washing machine. #CMT#ADVANTAGE : #/CMT# The door locking element is connected with the switch via the field winding and the commutating throttle of the drive motor circuit, and the door locking element requires reduced holding current in an operating condition. The interferencing switching edges of the electronic switch is shielded by the field winding and the commutating throttle of the drive motor circuit so that the interferencing switching edges emerge less on the lines to the door locking element, and hence economically avoiding electromagnetic compatibility (EMV) inferences via the controlling of the door locking element without any additional switching elements. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a circuit arrangement of a laundry treatment device. L, N : Power lines 3 : Common switch 10 : Door locking element 20 : Drive motor circuit 21, 23 : Reversing relays 22 : Armature 24 : Field winding 25 : Relay. |
