Inverter control system

An inverter control system comprising a controller configured to output a gate signal to a switching element provided in an inverter, the gate signal being produced based on an output terminal voltage of the inverter, an input current of the inverter and a current command value,

• the controller including:
• a low pass filter configured to extract a DC component from a current detection value of the input current of the inverter;
• a subtracting section configured to calculate a current difference between the current command value and the DC component of the current detection value;
• a current controller configured to produce two-phase PWM signals complementary to each other, from the current difference;
• an integrating circuit configured to integrate the output terminal voltage of the inverter to convert the output terminal voltage into a magnetic-flux information;
• a logic conversion section configured to convert the magnetic-flux information into a 120-degree conduction pattern to output the 120-degree conduction pattern;
• and
• a logic circuit section configured to execute a logic synthesis between the two-phase PWM signals and the 120-degree conduction pattern to output the gate signal.