Manfred Michel

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The performance of a converter using external commutation on the dc side is investigated. For this purpose the waveforms of currents and voltages are discussed considering especially the overlap. Equations for the angle of overlap and for the angle of advance are derived. The advantages of this type of converters are described if applied to a synchronous(More)
In connection with dc choppers, different modulation techniques are used. The chopper may be of a transistor bridge type or of any thyristor type. The output current and voltage can be controlled by pulsewidth modulation, pulse-frequency modulation, or two-level control of the load current. The steady-state behavior of the different modulation techniques is(More)
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