| 摘要 |
A method and an arrangement in connection with parallel-connected inverter modules, whereby two or more inverter modules (A, B, C) are connected in parallel to feed the same load, each inverter module (A, B, C) comprising two or more output phases (u, v, w) for supplying electric power into a two-phase or poly-phase load, the method comprising determining the temperature (TAu, TAv, TAw, TBu, TBv, TBw, TCu, TCv, TCw) of each output phase (Au, Av, Aw, Bu, Bv, Bw, Cu, Cv, Cw) in each inverter module, comparing the temperatures of the output phases in each inverter module with the temperatures of the same out-put phase in other parallel-connected modules, and providing an alarm signal if the temperature of the output phase in an inverter module differs from the tem-peratures of the same output phase of the other inverter modules more than allowed by a predetermined limit. |
