The actuator adopts the principle of bionics and works with a new method of clamp passively and drive initiatively and a distortion structure with the thin shelf flexible hinge.

So the dc motor ought to be a clamped motor.

It adopts the principle of bionics and works in a new mode of stator initiative anchoring/loosening and a distortion structure of double-side thin flexible hinge,which has solved the problem of anchoring/loosening, frequency, journey, resolution and velocity.

Aimed at the feature that the locality of axis of the armature mmf is determined by the brush in dc motor, a new concept on clamp is proposed.

This converter uses a simple auxiliary circuit without the active switch and lossy components so that the voltage stress of secondary rectifier diode is reduced and the current to charge or discharge clamping capacitance is self-adjusted in accordance with the load.

In development of the power stage for a 2 kVA high frequency on line UPS,methods of anti parallel diode across the serial resistor and active clamps are adopted to reduce the gate voltage spikes over MOS gated inverter power switches during their turn off.

Voltage clamping ZVS push-pull three-level converter;

In DC motor,the locality of axis of armature MMF was determined by the brush position,here the brush possessed a function of clamping.