Quck answer
To make an electric motor run backwards, you can reverse the direction of the current flowing through it. This can be done by swapping the connections of the motor’s power source, such as the battery or power supply. By reversing the polarity, the magnetic field generated by the motor’s coils will also be reversed, causing the motor to rotate in the opposite direction. However, it is important to note that not all electric motors can run backwards, as some may be designed to rotate in only one direction. Additionally, reversing the motor’s direction may require additional modifications or adjustments depending on the specific motor design.
There are three main types of electric motors: DC, single-phase AC, and three-phase AC. To make a DC motor run in reverse, switch the polarity of the input voltage. To make a single-phase AC motor run in reverse, switch the starter winding leads. To make a three-phase motor run in reverse, switch one leg of the input power. Always consult the manufacturer’s manual for guidance.
Step 1
DC motor with a switch
Disconnect the power to the motor. Connect the positive wire of the battery to the negative terminal and connect the negative wire of the battery to the positive terminal for a basic DC motor. Install a double-pole double-throw changeover switch between the battery and the motor. The motor will now have forward, reverse, and off positions.
Step 2
Disconnect the power to the single-phase AC motor and tag out the breaker or switch. Remove the motor cover and access the starter winding leads. Reverse the connections of leads 5 and 8. Refer to the motor hookup chart. If leads 1 and 8 and 4 and 5 are connected together, the motor will run counterclockwise. Disconnect the leads and connect leads 1 and 5 and 4 and 8 together.
Step 3
Tighten all connections and reinstall the case or cover. Remove the tag from the breaker or switch and apply power to the motor. Ensure that the motor is running in the correct direction.
Step 4
Three-phase AC motor
Disconnect the power from the three-phase single-speed AC motor. Ensure that the power switch and the breakers are tagged to prevent accidental electrocution. Remove the cover or inspection plate to access the input power wires. Reverse any one of these leads: T1 to T2, or T1 to T3, or T2 to T3. Only reverse one of these leads.
Step 5
Tighten the leads and terminals. Reinstall the cover or inspection cover. Remove the tags and restore power to the motor circuit. Make sure the motor is rotating in the desired direction.
