Advantages of three phase over single phase motors more energy. Please note catalog specifications are for delta wound motors. Electrical testing usually consists of Insulation Resistance (Meg Ohm M) tests and a. Without the green&white (B) the measured resistance will be the individual phase resistance which is 1.5 times the cataloged delta resistance, in this case 25.8ohms +/-10%.Īll other motors and wiring options have the 3 motor leads (red, brown, orange) and measuring the resistance across any two phases will match the catalog resistances. If checking the resistance of a motor with six-lead option (110, 210 or 310 motor with WD1 or WD2 wiring options) with an ohm-meter, the third phase will need to be tied together in order to measure the correct resistance across the first two phases.įor example, for a 310-4 with WD2S wiring, measuring the resistance between red&blue (A) and black&brown (C) will be 17.2ohms +/-10% with the green&white (B) tied together. Please note that the I-Force catalog resistance specifications are for the motor in delta wiring. Normally, their strength exceeds the minimum. All magnets will meet the minimal magnet specification.
voltage rating of one of the single-phase windings. The magnet tracks can see a variation in magnet strengths of 3-5% from one manufactured lot to the next. Figure 4Typical record of insulation resistance of a mill motor. As a rule to single phase motors, the following applies: (1) Ohms reading between S and R should give the maximum reading of resistance.
Measured Value S to R should be C to S + C to R. S to R measured values should be equal to C to S + C to R. Measure winding resistance C to S, C to R and S to R. This is how you should measure winding resistance in a single-phase motor since they feature three terminals S, C and R. 5 ohms between each of the phases and +/-30% for the inductance, similar to rotary servo motor tolerances. Since there are three terminals S, C, R in a single phase motor, measure winding resistance: C to S, C to R and S to R. Use your multimeter to test for winding resistance or checking on the Ohms reading from your motor. The Trilogy coils' winding tolerance is a standard +/-10% for the resistance and within.