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The contact less energy transfer requires a transformer with air-gap. So organized transformer suffer with the no-negligible leakage inductance. When hard switching principle has been used the undesirable high surge voltage appears on the semiconductor elements. This paper treats the 500 W AC-DC converter based on HF-AC resonant link circuit in order to avoid the high surge voltage problems
An approach for time-to-product reduction is presented in the paper. The work presents a solution to the problem of automatic calculation of scaling factors in the induction motor control algorithms with optimization of range and accuracy. The resulting algorithms can be applied to 16b fixed point processors. A successful application is presented with experimental results for DFOC algorithm
A power inverter applying a speed sensorless induction motor control is presented in the paper. It was designed with the goal to be used in applications positioned in the ex-environment of the underground mines. Direct field oriented control, using rotor flux and speed observer is used. The speed sensorless observer scheme is based on the back-emf observer. Applied hardware and software are presented...
In applications where size and efficiency are critical switched mode power supply converters are used. A switched mode DC-DC buck converter or step-down converter use output filter capacitor to reduce output voltage ripple. To reduce size of buck converter, the elimination of the capacitor must be done. Instead of the capacitor the structure with additional linear amplifier is introduced for output...
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