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我測(cè)量了6臺(tái)設(shè)備的電動(dòng)機(jī)空載電流
電動(dòng)機(jī)功率           空載電流              
1.6KW                1.7A        
3.7KW                                3.3A
3.7KW                                3.0A
3.7KW                                3.1A
7.5KW                                4.9A
                                            8.1A
想請(qǐng)問如何根據(jù)空載電流知道該電動(dòng)機(jī)的功率  謝謝