Motor, compressor and centrifugal machine

The utility model discloses a motor, a compressor and a centrifuge, the motor comprises a housing, the housing defines a first installation space, the first installation space is used for installing a motor module of the motor, the housing also defines a second installation space, the second installation space is used for installing a capacitor of the motor, and the inner wall of the second installation space is suitable for contacting with the capacitor. Therefore, according to the motor provided by the utility model, the capacitor is arranged to be in contact with the inner wall of the second installation space, so that the capacitor can perform heat dissipation through the shell, the heat dissipation capability of the capacitor is improved, the capacitor is ensured to work at a proper temperature, and the working performance of the motor is improved.