MODULE FOR A MULTILEVEL CONVERTER REGENERATING THE POWER AND THE MULTILEVEL CONVERTER USING THE SAME, CAPABLE OF IMPROVING EFFICIENCY OF A SYSTEM BY EXPANDING A LEVEL AND CONTROLLING VOLTAGE IN A DC LINK TERMINAL

摘要

PURPOSE: A module for a multilevel converter regenerating the power and the multilevel converter using the same are provided to reduce the weight and the volume of the system to 40 to 60% by implementing the multilevel converter with mutual independent DC source without a transformer.;CONSTITUTION: A reactor(11) controls the current of an input AC power side and prevents the short between unit cells. A PWM rectifier(12) converts the AC power from the reactor into the DC power and outputs the DC power. A capacitor(13) controls the AC flowing in the reactor by absorbing the current ripple element in the PWM rectifier and maintaining the constant voltage. A PWM inverter(14) converts the DC power to the AC power and outputs the AC power to the load. The PWM rectifier comprises H-bridge circuit using a power semiconductor switching device. The power semiconductor switching device is turned on or off.;COPYRIGHT KIPO 2010