For single coils and sometimes for motors, the resistances measured may be compared to a resistance value instead of having a balance calculated. A high measurement indicates the motor has an open winding. For a 3-phase motor, 3 resistance measurements are normally done between the phases, and the balance or imbalance between the 3 measurements is calculated and displayed along with the measurement values. For example, If the voltage across the coil is 230v ac and the current through the coil is 10A, Impedance, Z 230/10 23 ohm. I can measure the magnitude of the current through the coil using a DMM. The readings should be about 10-14% of the following values:Ī low measurement indicates the motor has a shorted winding. I want to find out the resistance and the reactance of an motor coil. This gives you the true resistance measurement.
#Motor winding resistance values how to
If you do not know how to zero your meter, take note of the resistance measured when the two leads are touched together and subtract that from the actual measurement.
#Motor winding resistance values manual
IMPORTANT: Set the multimeter to the ohm scale and zero it out by touching the two leads together and pressing the appropriate button to zero your meter (see your meter instruction manual on how to do this). Each motor, regardless of the connector, can be measured this way. There are no secrets here Motor winding resistance is just that, the resistance in the motor winding itself. The winding resistance is most likely the easiest parameter in brushless motors to understand.
These can be used to measure the resistance. Brushless motor winding resistance is a motor constant that is directly related to the efficiency of the motor. At the connector, you can see tabs where the pins are (see Figure 2 and Figure 3). Starting from either side, the first two wires are one phase and the remaining two wires are the second phase. To measure the resistance, disconnect the motor at the connectors (see Figure 1). Resistance in the stepper motors is measured on the two phases. Stepper Motor Resistance Test Stepper Motor Resistance Test
0 kommentar(er)
