| 摘要 |
PURPOSE:To maximize the rated capacity in response to the ambient temperature by detecting the ambient temperature, calculating the maximum allowable ON state loss, and modifying the power reference based on thus calculated ON state loss. CONSTITUTION:A temperature detector 34 detects the ambient temperature of an inverter. Assuming the inverter is set in a quick conversion mode, a maximum allowable ON state loss calculating means comprising an operating circuit 23 calculates the maximum allowable ON state loss of a GTO, under this temperature state, based on thus detected ambient temperature and the limit junction temperature of the gate ON thyristor(GTO) in the inverter. A power reference modifying means comprising the operating circuit 23 modifies the effective/reactive power reference for controlling the ON/OFF timing of each GTO to an effective/reactive power reference corresponding to the maximum allowable ON state loss. |
