The actuator of this governor is linear proportional magnet.

Development of test system for proportional electromagnet actuators' performance

Study on static characteristics of a new type of directly proportional solenoid;

Force-control type proportional solenoid with low power consumption

A new proportional solenoid with bi-directional operation was presented to deal with the uni-directional low driving performance of conventional proportional solenoid,which worked on differential control of magnetic fields produced by permanent magnet and control coils.

Static torque characteristics of high-pressure bidirectional rotary proportional solenoid;