Patent ID: 6532858
Filing Date: 2003-03-18
Classification: F04B,H02K

Abstract:
An electric compressor comprising:an electric motor, wherein the motor generates driving torque; a rotary shaft driven by the motor; and a plurality of compression members for compressing gas in accordance with rotation of the rotary shaft, wherein rotation angles of the rotary shaft at which load torques generated by the individual compression members are maximum are different from rotation angles of the rotary shaft at which the driving torque of the motor is maximum; wherein during one turn of the rotary shaft, at least one occurrence of a minimum net load torque generated by the compression members occurs at substantially the same rotational angles as at least one occurrence of a minimum driving torque of the motor; wherein during one turn of the rotary shaft, at least one occurrence of a maximum net load torque generated by the compression members occurs at substantially the same rotational angles as at least one occurrence of a maximum driving torque of the motor; and wherein a magnitude of the driving torque is always greater than a magnitude of the net load torque.