Electric compressor

An electric compressor comprising:

• a compression mechanism configured to compress and discharge a refrigerant;
• a motor configured to drive the compression mechanism;
• a motor drive circuit connected between the motor and a direct current power supply, the motor drive circuit including a plurality of switching elements;
• and
• a control unit configured to control drive of the motor including sensorless control that increases or reduces the number of rotations of a rotor of the motor while estimating the position of the rotor on the basis of the current value of a current flowing from the motor drive circuit to the motor, wherein
• the control unit executes:
• synchronous deceleration control that decreases the number of rotations of the rotor under forced synchronous control using a predetermined target current value of the current flowing from the motor drive circuit to the motor, on condition that, at the time of or after a stop command for the motor is inputted from an outside, the number of rotations of the rotor is equal to or less than a predetermined first number of rotations and is greater than a predetermined second number of rotations, wherein the first number of rotations is greater than zero, and the second number of rotations is greater than zero and less than the first number of rotations;
• and
• stop control that stops rotation of the rotor under braking control that controls drive of a predetermined switching element of the plurality of switching elements in such a manner as to apply a load to the motor, on condition that the number of rotations has reached the second number of rotations under the synchronous deceleration control.