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Why can't you change direction of a DC motor by reversing the line wires?
Wiki User
∙ 11y ago
in some cases we need a desired speed, like in cassette stereo system we need the proper speed so that we can listen the song in a proper manner so we need to control the speed of motor.
more example-lift,elevator
Wiki User
∙ 13y ago
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Need of changing current direction in 3 phase motor?
Your question is confusing. Are you asking how to reverse the direction of a three-phase motor? If so, then the answer is that you simply interchange any two of the line conductors. This will cause the naturally-rotating magnetic field in the motor's air gap to reverse direction, causing the rotor to reverse direction.
How could you reverse the rotation of the motor?
The motor will spin the direction that the positive lead is on. So if the shaft is pointing towards you, you will need to put the positive lead on the left side to make it turn counter clockwise.
Reverse direction on a 480 ac motor?
Reverse any two of the lead wires at the motor junction box.
Can you Show diagram of 3 phase motor circuit?
Connect the three wires that come out of the motor to the three supply wires that come from the magnetic contactor. Turn the power on and push the start button. If the motor turns the wrong way, shut the power off and change any two wires in the motor junction box.
What is the effect of reversing the connections to one winding of the three phase motor?
Switching any two of the three phases will cause the motor to turn in the opposite direction. This rotation change should be done in the motor's junction box so that the colour phasing will remain accurate throughout the circuits system. For that reason, motors used where the direction of travel matters (like for elevators or escalators) are equipped with reverse phase relay devices that prevent the motor from operating unless the phases are wired in the correct order. Switch two leads of the wires going to the motor for ex. L1,L2,L3 change to L1,L3,L2. If this motor is wired for wye-delta starting, it will be easier to change the incoming power than at the motor junction box. Wye delta motors are six lead or twelve lead motors and lead pairing is critical on a wye delta setup. If the motor is started across the line like a standard nine lead motor, then by all means change it at the motor junction box.
What would cause a 12 volt motor to change polairity?
This assumes you have a 12 volt direct motor. You should be able to simply reverse the wires leading to the terminals. There should be two wires going to the motor. Change them around.
What is the type of switch that reverses the rotation of a single phase motor?
If you are talking about a switch that is used to change the direction that a single phase motor turns from clockwise to counter clockwise, the switch is called a forward - reverse drum switch. By reversing any two of the three phase legs that feed the 3 phase motor. <<>> On a single phase motor a drum switch is used. This switch reverses the start winding so that when voltage is applied to the motor it will revolve in the reverse direction.
Need of changing current direction in 3 phase motor?
Your question is confusing. Are you asking how to reverse the direction of a three-phase motor? If so, then the answer is that you simply interchange any two of the line conductors. This will cause the naturally-rotating magnetic field in the motor's air gap to reverse direction, causing the rotor to reverse direction.
How direction of a split phase motor can be reversed?
reverse wires
How could you reverse the rotation of the motor?
The motor will spin the direction that the positive lead is on. So if the shaft is pointing towards you, you will need to put the positive lead on the left side to make it turn counter clockwise.
Reverse direction on a 480 ac motor?
Reverse any two of the lead wires at the motor junction box.
Can you Show diagram of 3 phase motor circuit?
Connect the three wires that come out of the motor to the three supply wires that come from the magnetic contactor. Turn the power on and push the start button. If the motor turns the wrong way, shut the power off and change any two wires in the motor junction box.
What is done to revers direction of a three phase electric motor?
To reverse direction, swap any two hot wires.
What happens if you change wires around on 3 phase motor?
It depends on how, and with what you change them.
What is the effect of reversing the connections to one winding of the three phase motor?
Switching any two of the three phases will cause the motor to turn in the opposite direction. This rotation change should be done in the motor's junction box so that the colour phasing will remain accurate throughout the circuits system. For that reason, motors used where the direction of travel matters (like for elevators or escalators) are equipped with reverse phase relay devices that prevent the motor from operating unless the phases are wired in the correct order. Switch two leads of the wires going to the motor for ex. L1,L2,L3 change to L1,L3,L2. If this motor is wired for wye-delta starting, it will be easier to change the incoming power than at the motor junction box. Wye delta motors are six lead or twelve lead motors and lead pairing is critical on a wye delta setup. If the motor is started across the line like a standard nine lead motor, then by all means change it at the motor junction box.
How do you fix the drivers side window that will go down but not come up in a 1993 Caprice Classic?
Maybe a bad switch or motor Try reversing the wires on switch
How do you rotate a shaft?
I presume you are talking about how to change the direction of rotaion on an electric motor. To change the direction of a three phase motor, switch any two wires of the three phase feed, and the motor will rotate in the opposite direction.
