Patent ID: 6459598
Filing Date: 2002-10-01
Classification: H02M

Abstract:
An inverter apparatus comprising:an inverter circuit for driving a load, said inverter circuit having at least a pair of switching elements connected in series in a forward direction between both polarity terminals of a dc supply, for supplying power to a load; an inverter drive circuit for driving each switching element of the inverter circuit, said inverter drive circuit having at least one high withstand voltage IC wherein the signal level reference potential is different from the input signal and the output signal; a clamping circuit for clamping the high withstand voltage potential of a low voltage side reference terminal, to which a potential that is a reference for operation of the high withstand voltage IC in the inverter drive circuit and is the reference for a signal on a low potential side of the high withstand voltage IC, is applied, to a high voltage reference terminal, to which is applied a reference potential for a high potential side of the high withstand voltage IC; and a voltage dividing circuit for dividing a voltage between the low voltage side reference terminal of the high withstand voltage IC in the inverter drive circuit, and a negative electrode of the dc supply.