초록 ▼

The inverter controller includes a deviation arithmetic circuit which calculates the deviation between the current command (reference) and the output current, a vector angle arithmetic circuit which calculates the deviation current vector angle on the basis of the deviation calculated by this deviat

The inverter controller includes a deviation arithmetic circuit which calculates the deviation between the current command (reference) and the output current, a vector angle arithmetic circuit which calculates the deviation current vector angle on the basis of the deviation calculated by this deviation arithmetic circuit, and a switching sequence logic circuit which selects the switching signal on the basis of the deviation current vector angle calculated by the vector angle arithmetic circuit and its own switching signal being output or on the basis of the deviation current vector angle and its own switching signal and the switching signal output previously, and obtains an output current by controlling self-turn-off switching devices on the basis of the switching signal output by the switching sequence logic circuit.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] An inverter controller for keeping an output current of an inverter having self-turn-off switching devices to be obedient to a current command, said inverter controller comprising:a deviation arithmet

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] An inverter controller for keeping an output current of an inverter having self-turn-off switching devices to be obedient to a current command, said inverter controller comprising:a deviation arithmetic circuit for calculating a deviation between said current commands and said output current;a vector angle arithmetic circuit for calculating a deviation current vector angle on the basis of a deviation from said deviation arithmetic circuit; anda switching sequence logic circuit for generating a switching sequence so that switching signals are selected on the basis of said deviation current vector angle calculated by said vector angle arithmetic circuit and a switching signal being output by said switching sequence logic circuit itself or on the basis of said deviation current vector angle and said switching signal being output by the switching sequence logic circuit itself and said switching signal output previously,said inverter controller controls said self-turn-off switching devices on the basis of said switching signals output by said switching sequence logic circuit.