How to wire an electric motor?
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How to wire an electric motor?

Views: 0     Author: Site Editor     Publish Time: 2021-03-30      Origin: Site


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Electricity is an indispensable part of our lives. The domain is as big as going into space, and as small as static electricity when undressing. We use electricity in all aspects of our lives, and we cannot do without electricity. For example, household electricity, factory electricity, and driving vehicles. For such an important electricity, it is very important to learn some necessary knowledge about electricity usage. Here I will introduce all the knowledge and common sense about electric motor boundaries encountered in an empirical way for your reference, I hope it will be helpful to you.

This passage is going to talk about the followings of electric motor:

(1)Introduction of electric motors

(2)Steps to wire an electric motor

(3)Working principles of electric motor


(1)Introduction of electric motors

The single-phase electric motor uses a power supply consisting of a live wire and a neutral wire to work. So, connect the power cord first. Although there is a red line and a blue line, there is no difference in position, that is, the two lines in the picture can be interchanged. There is no distinction between zero line and hot line. A single-phase motor also relies on the coil to generate a magnetic field to make the motor rotate. Since single-phase electricity has no phase difference, it must have a phase difference like three-phase electricity to rotate. So, a single-phase motor also has at least two sets of coils. It can be rotated by generating a phase of 90 degrees.

electric motor 

(2)Steps to wire an electric motor

Before wiring any AC motor, be absolutely sure to remove all electricity from the motor circuit. Turn on the circuit breaker that will provide power. Mark the circuit breaker to ensure that power is not accidentally restored to the circuit.

Check the motor manufacturer's manual for advice on proper wiring for your application. If the motor does not have a manual, please look for the connection diagram somewhere on the motor. The schematic can be on the outside of the motor, or under the inspection board or cover of the motor.

For connection diagrams of most modern motors, see the following link in the references section. Find the correct wiring for your specific motor. For example, if the motor is single-phase, single-voltage, and you want it to rotate counterclockwise, the graph will show that the input power is connected to L1 and L2. For CCW rotation, wires 1 and 8 are connected together, and wires 4 and 5 are connected together.

Open the motor cover to access the motor terminals. Strip the end of the power cord and crimp the terminal. Connect the wires to the motor terminals. Use a wire cap to connect the wires together for proper rotation.

After the wiring is complete, replace the cover and energize the motor circuit. Make sure the motor is running in the correct direction.


(3)Working principles of electric motor

The basic idea of an electric motor is very simple: you plug in electricity at one end and rotate the shaft (metal rod) at the other end to provide you with the power to drive a certain machine. How does this work in practice? How exactly do you convert electricity into exercise? In order to find the answer, we must go back nearly 200 years.

Suppose you take a piece of ordinary wire, make it into a large loop, and place it between the poles of a powerful permanent horseshoe magnet. Now, if you connect both ends of the wire to the battery, the wire will jump up briefly. When you saw this for the first time, it was amazing. It's like magic! However, this is a completely scientific explanation. When the current starts to creep along the wire, it generates a magnetic field around the wire. If the wire is placed near a permanent magnet, this temporary magnetic field will interact with the magnetic field of the permanent magnet. You will know that two magnets placed close to each other will attract or repel each other. Similarly, the temporary magnetism around the wire attracts or repels the permanent magnetism in the magnet, which is the cause of the wire jumping.

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