Patent ID: 7205740

Claim:
A fan control device for a frequency converter, which is a control device applied to a high-power frequency converter, and the control device comprising: a rectification circuit, electrically coupled to an external AC power supply, for converting an AC to a DC output; a DC/DC conversion circuit, electrically coupled to the rectification circuit, for converting a DC operating voltage output; a fan module, electrically coupled to the DC/DC conversion circuit and disposed at each mechanical structure of the frequency converter and an installing area that requires heat dissipation; a fan control circuit, electrically coupled to the DC/DC conversion circuit, for receiving and controlling an operation or a halt of the fan module; and a sensor, electrically coupled to the fan control circuit and disposed at each mechanical structure of the frequency converter and a position that requires heat dissipation; wherein the fan control circuit has a temperature parameter for each mechanical structure of the frequency converter and each position that requires heat dissipation and outputs a control signal to control the speed, quantity, start or stop of a fan according to a temperature change of each mechanical structure of the frequency converter and each position that requires heat dissipation detected by the sensor wherein the fan module is installed in an installing area disposed at a predetermined position of the casing by a detaching method, and wherein the detaching method comprises a protective cover and a bracket capable of latching the fan module to the protective cover, and the bracket is fixed to both sides of the fan module for detachably latching the fan module into the protective cover, and the protective cover collocates with the locking element for securing and fixing the protective cover to the corresponding installing area by the locking element.