Variable-frequency power supply and heat dissipation structure thereof

The utility model relates to a variable frequency power supply and a heat dissipation structure thereof, which comprises a cabinet body, an STS module and a cabinet door, the cabinet door is connected with the cabinet body in an openable manner, the STS module is arranged in the cabinet body and is close to the cabinet door, the STS module and one side of the cabinet body far away from the cabinet door are spaced to form an air guide channel, and a heat dissipation fan is arranged on the top surface of the cabinet body at a position corresponding to the air guide channel. The STS module is provided with a heat dissipation channel, and the heat dissipation channel is communicated with the air guide channel. The STS module and the side, away from the cabinet door, of the cabinet body are spaced to form the air guide channel, the heat dissipation fan is arranged at the position, corresponding to the air guide channel, of the top face of the cabinet body, the STS module is provided with the heat dissipation chann