Method for producing electric motor, electric motor, compressor, and air conditioner

A method for producing an electric motor including a stator and a rotor having a magnetic pole, the stator having a stator core and three-phase coils attached to the stator core by distributed winding, the rotor being disposed inside the stator, the method comprising:

• disposing the rotor inside the stator, the rotor having a magnetic material that is not magnetized;
• connecting a first phase coil of the three-phase coils to a positive side of a source of electrical power for magnetizing;
• passing an electric current through the three-phase coils in a state where a center of the magnetic pole of the rotor is rotated a first angle with respect to a center of a magnetic pole of the first phase coil in a first rotation direction of the rotor, the magnetic pole of the first phase coil being formed when the electric current flows through the first phase coil from the source of electrical power;
• switching a connection with the positive side of the source of electrical power from the first phase coil to a second phase coil of the three-phase coils;
• and
• passing an electric current through the three-phase coils in a state where the center of the magnetic pole of the rotor is rotated a second angle with respect to a center of a magnetic pole of the second phase coil in a second rotation direction, the magnetic pole of the second phase coil being formed when the electric current flows through the second phase coil from the source of electrical power, the second rotation direction being an opposite direction to the first rotation direction of the rotor.