Category : Electrical and electronic equipment & instrumentations > Electrical equipment for power systems

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DC-DC converter circuits have been used extensively in commercial low voltage (3 V-50 V) power control applications because of their speed and high efficiency. DTI has scaled this familiar circuit topology to high voltage (160 kV) and high power (3 MW) for power conversion applications. DTI combines many low voltage semiconductor components, such as IGBTs, in series, into a single high voltage switch. Recent improvements in voltage and current handling capabilities of IGBTs enable the design of very fast opening and closing switches. Two circuits, a buck regulator (down-converter), and a boost regulator (up converter), are illustrated in the figures on this pageThe opening and closing of the switch is controlled by Pulse Width Modulation (PWM), which provides feedback of the voltage or current delivered to the load. The pulsed output of the converter is then filtered for low ripple. These circuits act as nearly lossless DC transformers with output power equal to input power.

PowerMod buck regulator power supplies are highly reliable. Isolated switch module failures do not force the power supply to shut down because the solid-state components have full soft-fail capability. DTI delivered the buck regulator power supply shown to the left for a high power tube testing application.

An emerging application of DTI's DC-DC converters is solid-state DC power distribution and control. The benefits of using solid-state technology include:

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List of all articles in this sub-category Electrical equipment for power systems

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