Electrical compressor with an electric motor, electrical circuit and protection device is expensive

摘要

The invention relates to an electrical compressor, the integral of a compressing mechanism, an electric motor and an electrical circuit (an inverter) for driving the electric motor, measures are taken, the electrical circuit in order to protect against thermal damage. If an actual rotational speed is not higher than a fixed rotational speed and the temperature of the electrical circuit (13) a fixed temperature exceeds, the temperature tm of an electric motor (12) and the temperature ti of the electrical circuit (13) is reduced by increasing the rotational speed of the electric motor, and if the actual rotational speed higher than a fixed rotational speed, and the temperature of the electrical circuit (13) a fixed temperature exceeds, the temperature tm of the electric motor (12) and the temperature ti of the electrical circuit (13) is reduced by reducing the rotational speed of the electric motor.