Method of controlling the force of a solenoid, a controllable force transducer and the use thereof
OwnerJörgen Sundmarkinventor
Life of this patent
Estimating the term…
Abstract
A method of controlling a solenoid for controlling the force thereof, and a controllable force transducer includes that only a small part of the maximal stroke length of the solenoid is utilized, whereby the exerted force thereof is substantially constant within said stroke-length distance, when the solenoid is fed with a constant driving power. At a constant driving voltage, the feed current can be controlled for a proportional alteration of the exerted force of the solenoid within said stroke-length distance. The controller finds favourable use in a sheet separator.
Claims7
A method of controlling the force of a linear solenoid having a maximum stroke length, characterized in that the action distance of the solenoid is limited to a small part of the maximal stroke length thereof, whereby the solenoid, in one the action direction thereof, at a constant feed power, gives essentially a constant force within the limited action distance, and that the force within the limited action distance is proportionally controllable by the control of the feed power of the solenoid.
A controllable force transducer comprising a linear solenoid having a predetermined maximum stroke length, characterized by means for limiting, in one action direction of the solenoid, the action distance of the solenoid to a small fraction of the maximal stroke length thereof, whereby the solenoid can exert a constant force in said one action direction for a constant feed power, and whereby the action force of the solenoid within the action distance is proportionally controllable by the control of the feed power.
Dependencies are inferred from the claim text.