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Because of the existence of reverse recovery time of the clamp diode and di/dt-chokes diode of three-level natural point camped (NPC) inverter, the partial over current phenomena will occur at the capacitive load or inductive load condition. This problem limits the energy densities of the system and do harm to the power switch devices. To avoid this over current problem, a novel circuit of three-level...
To benefit the compact and insulation design of feeder switches, a current transformer feeding power supply is put forward. The non-linear behavior of the current transformer, the circuit topology and design considerations of the proposed power supply are detailed. Losses of the devices and the minimum primary current to ensure the performance of the power supply are analyzed, as well. Experiments...
Due to the existence of reverse recovery time of power diodes, the clamp diodes and di/dt-chokes diodes of three-level NPC inverter will enter the reverse recovery region at the same time, and the partial over-circuit phenomena will occur. This problem limits the output power of inverter system and do harm to the devices. To avoid this over-current problem, a new circuit implementation of 6 kV three-level...
The dynamic behavior of DC-DC converters is analyzed on the basis of a state-space averaged model including the feed back loop. The low frequency ripple behavior of DC-DC converters is analyzed in s field. A buck DC-DC converter is used as an example. The condition causing oscillation and impulse during starting period and in case of input perturbation is obtained. The output to input voltage transfer...
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