How to wire a motor with a rotor and coil

How to Wire a Motor with a Rotor and Coil

The wiring method for motors with rotor windings must be determined based on the motor type (e.g., three-phase motor, single-phase motor) and wiring configuration (star, delta), as detailed below:

1. Three-phase Motor Wiring Method
Star connection (Y-type)
Wiring method: Short-circuit the three terminals on the junction box as the neutral point, and connect the remaining three terminals to the three-phase live wires (A, B, C). Applicable scenario: Suitable for three-phase motors with lower voltage.
Delta connection (Δ type)
Wiring method: Short the terminals on the upper and lower sides of the junction box to form three pairs of electrodes, with each pair connected to one phase of the three-phase live wire.
Applicable Scenario: Suitable for three-phase motors with higher voltage.

II. Wiring Methods for Single-Phase Motors
Cross connection
Wiring method: Two sets of windings are connected to both ends of the capacitor, with the capacitor supplying power in parallel to generate rotational force.
Applicable Scenario: Suitable for single-phase motors requiring speed regulation.
Parallel connection method
Wiring method: Two sets of windings are connected in parallel to form a circuit, with current diversion driving the motor.
Applicable scenario: Suitable for single-phase motors with low load or simple startup requirements.

III. General Precautions
Pre-wiring inspection: Check the rotor insulation and wiring box condition to ensure there is no damage or looseness.
Tools Required: Prepare a multimeter, screwdrivers, and other tools to avoid crossed or excessively short wires.
Testing and Verification: After wiring, measure the insulation resistance with a multimeter, and inspect the speed and rotation direction during trial operation.

IV. Special Scenario Handling
Wound rotor motor: If short-circuiting the slip ring for starting is required, the resistors (typically 3 stages) must be short-circuited step by step according to the wiring diagram, or the slip ring output wires can be directly short-circuited.
Lifting motor: Wiring must be performed according to the specific model, typically operated and tested by professionals.

Summary: Before wiring, it is essential to clarify the motor type, pole number, and wiring diagram. Always refer to the equipment manual or seek guidance from a professional electrician to ensure safety and reliability.