Single-phase capacitor motor connection
The single-phase motor has three taps. First, use a multimeter to block the resistance between the three wire ends. The two wires with the largest resistance are connected in parallel with each other. The other wire (common terminal) is connected to one end of the power supply. Then use the multimeter's electrical blocking to measure the resistance between the common terminal and the wire ends at both ends of the capacitor. The slightly larger end of the resistor is connected to the other end of the power supply. It is absolutely forward-connected. If you want to change the direction, connect one end of the capacitor. The power cord can be connected to the other end.
The main winding and the secondary winding of the three-phase single-phase motor are easy to judge:
1. First measure the resistance of the three lines, remember the two lines of the maximum value and their resistance values, and the third line is the connection point of the primary and secondary lines;
2. Measure the resistance of the contact and the two ends respectively (the sum of the two resistance values must be equal to the above maximum value). The main winding is the smaller resistance value, and the secondary winding is larger.
Generally, for a single-phase capacitor, the AC motor is started, and the winding connector in series with the capacitor is the secondary winding.
Let the secondary winding resistance be R1 and the main winding resistance be R2, then R1>R2. (The main winding power is large, the resistance is small)
Use a multimeter to measure and compare the resistance between each of the three terminals. First find the secondary winding terminal that the live wire is connected through the capacitor: the maximum resistance between it and the other two terminals (R1 in series R2), and The second largest value R1) finds the terminal with the minimum resistance value R2 and the second small resistance value R1 among the remaining two terminals, that is, the terminal of the zero line, that is, the common terminal of the main winding and the secondary winding
Why do single-phase motors have three line start capacitors and how to wire the motor?
If the motor itself does not have a wiring diagram, only the universal meter can be used. The resistance of the three sets of resistance is measured by the resistance file. The two terminals of the largest group are the series connection of the start and the working winding, and the middle set is the working winding. Two terminals, the smaller one is the two-sided terminal of the starting winding, the working winding is connected in parallel with 220VAC, and the starting winding and the capacitor are connected in series and connected in parallel with the power supply.
