|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||327/110 ; 123/490|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 10 인용 특허 : 5|
A method of operating a drive circuit of a solenoid of an electromagnetic device including an armature, the drive circuit including switch means in series with the solenoid, comprising closing the switch means to achieve a high rate of current increase in the solenoid, opening the switch means when the current reaches a predetermined level and allowing the current to decay, the movement of the armature from a first to a second position being completed whilst the current is decaying and monitoring the decaying current using a sensing circuit which include...
[ We claim:] [1.] A method of operating a drive circuit which controls the flow of current in a solenoid winding of an electromagnetically operable valve having an armature coupled to a valve member, the armature and valve member being movable from a first position to a second position under the influence of a magnetic field generated by the solenoid winding, the solenoid winding having electrical characteristics such that movement of the armature is completed after the current in the solenoid winding has reached a peak value, the drive circuit including...