Using a multimeter to measure the quality of the motor can be determined by measuring the inter-turn resistance, winding resistance, and winding-to-ground (iron core) resistance. The inter-turn resistance and winding-to-ground resistance should be measured with the highest resistance gear of the multimeter, and the measurement result should be infinite. ; The winding resistance needs to know the normal value or compare it with the adjacent winding resistance for reference, and the low resistance gear of the multimeter should be selected to measure the winding resistance.
