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How to Change AC Mmotor Direction
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How to Change AC Mmotor Direction

Views: 0     Author: Site Editor     Publish Time: 2022-04-28      Origin: Site

If you want to work with electric motors at home or in the workplace, it will be helpful to understand some of the working principles of electric motors. In some cases, you may need to reverse the direction of a single-phase Ac motor. Fortunately, this is a fairly simple task, because most single-phase induction motors will move forward and backward based on their wiring and the generated magnetic field. However, before carrying out such projects, certain safety procedures must be followed like any electrical work. How to reverse the direction of an Ac motor?


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

(1)   Electrical safety tips of ac motor

(2)   Single-phase motor basics

(3)   Single-phase Ac motor direction change



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Electrical safety tips of ac motor

Before you start, you must fully understand all the necessary steps of an electrical project. For safety reasons, you should always inform other people present that you will use electricity, and ask them not to flip any circuit breakers or switches before completing the operation. Turn off all power to ac motor to be used at the circuit breaker box. Whenever possible, wear high-pressure rubber gloves and use rubberized tools.


Single-phase motor basics

The core of an induction motor is the rotor. The rotor is composed of permeable iron and aluminum circuit windings. The aluminum winding makes ac motor resistant to rapid magnetic field changes. This means that any field that ac motor will sense is a field to follow. Therefore, the direction of ac motor can be reversed by reversing the magnetic field it follows.



Single-phase Ac motor direction change

To reverse the rotation of a single-phase AC capacitor starter motor, you will need to reverse the polarity of the starter winding. This will cause the magnetic field to change direction and ac motor will follow. To achieve this, you can swap the connections at both ends of the winding. Always reverse the wire leading to the starter winding.

Please note that most motors, if still marked with the manufacturer's instructions, will indicate that they are irreversible. If this is the case, it may be because the wires you need to use are all located inside ac motor. If your device has this warning, it is the most difficult to proceed. However, if your motor is reversible, you may notice that it provides a reverse indication. Usually, these instructions tell you which wire to change. For example, some devices may switch the red and green wires in the junction box at the end of the enclosure. In other cases, the blue and yellow wires may need to be swapped. The color of the wires is highly independent and depends on the make and model of ac motor you have. It is best to read the instructions provided by the manufacturer before continuing.

If you determine which wires can be reversed, use a flat-head screwdriver to remove the end cap of ac motor. Your motor may have a junction box. In either case, you need to access the terminal to which the designated wire is connected. You may be able to use needle-nose pliers to remove the wire and switch the terminal to which it is connected. Some systems use nuts to connect wires. In this case, you will need to use a nut driver to access the terminals.

After the wires are switched, please reinstall the end cover or close the terminal box of ac motor. Restore power to the circuit and test ac motor to ensure that the magnetic field has switched and that the magnetic field does indeed rotate in the opposite direction.


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