| 摘要 |
The invention concerns a monitoring method and system for monitoring an electric motor, comprising: modelling means (5) for modelling a circle diagram (31) based on current intensities of said electric motor, calculating means (7) for calculating at least one operational parameter by using said circle diagram, said operational parameter being anyone out of the following operational parameters: torque, resistive loss, rotor resistance, slip, and motor yield, monitoring means (9) for monitoring said electric motor (3) based on said operational parameter.
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