<p>The actuator has a stator (12) with a stator coil (22), and a rotor (14) with permanent magnets (N, S) and surrounding the stator. The stator is attached to a stationary part and the rotor is connected to a rod (38) for transmission of operating force (F) and engine power (V) applied to the rotor and superimposed to the operating force, where the operating force is induced in both ends of the rotor. The rotor is rotatably supported relative to the stator, where the stator is made of magnetically soft material.</p>
