POWER SOURCE REGENERATION SYSTEM OF VOLTAGE TYPE INVERTER

摘要

PURPOSE:To adapt for the use of the case of driving a load that a brake torque is smaller than a drive torque by setting a DC intermediate voltage at driving time corresponding to a diode rectifying voltage irrespective of the presence or absence of power source regeneration. CONSTITUTION:A generation brake circuit 6 is provided in a DC intermediate circuit. A power reactor 2 is controlled so that the phase delay angle of the reactor 2 is maximum at the DC intermediate circuit voltage at driving time. An inverter 3 is controlled so that the output voltage becomes equal to the maximum value. Regenerative energy is consumed by a generation brake circuit 6 at braking time to reduce the DC intermediate circuit voltage to the value capable of converting by a power inverter 2', while the inverter 3 is decreased at its output voltage to the value to regenerate the power source.