Patent ID: 7023712

Claim:
A cooling arrangement in a frequency converter, the arrangement being configured to convey heat generated at the frequency converter to a space surrounding the frequency converter, comprising: a power part of the frequency converter, comprising a rectifier, an intermediate circuit and an inverter, a control part of the frequency converter, connected to the power part, measurement means connected to the power part and to the control part for producing measurement information from the power part, and the control part comprising means for receiving control information supplied thereto and means for receiving measurement information, means for producing adjustment information by utilizing the received measurement information and the supplied control information, and means for transmitting this adjustment information to the inverter for controlling it, and cooling means comprising a cooling motor and a transfer means for producing cooling, wherein in the arrangement: a cooling frequency converter is arranged in connection with the frequency converter to control the cooling means, the cooling frequency converter comprising the rectifier of the frequency converter and the intermediate circuit of the frequency converter, as well as a unique power unit, the power unit being arranged between the intermediate circuit and the cooling motor in order to supply power to the cooling motor, the cooling frequency converter having a control unit connected to the power unit and controlling the same; and wherein the control unit of the cooling frequency converter is connected to the control part of the frequency converter for delivering the measurement information and control information received by the control part from the control part to the control unit, which comprises reception means for receiving the measurement information and the control information, and control means for producing adjustment information on the basis of the received measurement information and control information, and transmission means for transmitting this adjustment information to the power unit for controlling the same.