Power conversion device

A power conversion device connected between a power source and a motor comprising:

• an inverter for converting a voltage outputted from the power source into an AC voltage;
• a temperature sensor for detecting a temperature of the inverter;
• a capacitor that smooths a voltage between terminals between the power source and the inverter;
• a voltage sensor for detecting the voltage between terminals of the capacitor;
• an inverter controller for controlling the inverter;
• a rotation speed sensor for detecting a rotation speed of the motor;
• an electric current sensor for detecting electric current supplied to the motor;
• and
• a discharge determination instruction controller for giving an instruction for discharging electric charges accumulated in the capacitor,
• wherein, after control of reducing the rotation speed of the motor is performed in accordance with the temperature of the inverter, the rotation speed of the motor and the electric current supplied to the motor, discharge control of the capacitor is performed.