Air conditioner

An air conditioner in which an indoor device and an outdoor device are separately provided, the air conditioner comprising:

• an outdoor fan that is provided in the outdoor device;
• a permanent magnet synchronous motor that drives the outdoor fan;
• an inverter of which power is supplied from a direct-current power supply and which applies a voltage to the permanent magnet synchronous motor;
• an inverter control unit that controls a voltage output from the inverter;
• a current detection unit that is connected between the direct-current power supply and the inverter;
• and
• a protection circuit that detects a current flowing through the current detection unit and executes a protection thereof,
• wherein
• the inverter control unit includes a brake sequence that brakes a rotation of the outdoor fan, and
• the brake sequence sets a starting-time conduction ratio, which is a conduction ratio at a time of starting braking, such that the protection circuit is able to detect the current flowing through the current detection unit.