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Is it possible to stop the rotation of motor even if the power supply persists?
Wiki User
∙ 13y ago
Yes. With enough of a load on a motor the rotation can be stopped. As the motor starts to slow down the current draw of the motor starts to go higher. Usually what will happen is as the current goes higher the overload protection on the motor's starter will trip and disconnect the electrical supply from the motor long before the motor stops turning.
Wiki User
∙ 13y ago
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How do you reverse polarity on ac motor?
Reversing polarity is not possible with an ac motor. Some do have wiring that will allow you to change rotation. The type and model of the motor can tell you if it is reversible.
Why is it necessary to change the directions of the current in the coil of an electric motor as it turns?
The magnetism set up in the motor, attracts opposite poles. One pole is in the rotor and the the other on the stator. The attraction causes the rotor to turn. If allowed to continue, the pole will get as close as possible and then stop. The motor will stall. On a brushed, DC motor, the commutator acts as a switch and turns off the nearest coils and connects the next one along, allowing continuous rotation. On an AC motor, the supply is changing direction, this acts in synchronization with the rotation.
Why is the rotation of a fan only in one direction although it is connected to an AC supply?
The direction of the motor is dependent on the way the stator coils are wound.
What is crawling in induction motor?
Crawling refers to a condition wherein there is a slow rotation of the rotor caused due to the presence of harmonic content in the supply.
How do you change rotation of 6K709C dayton jet pump motor?
Interchanging the red and black leads in the motor's motor junction box will reverse the direction of rotation on the motor.
When changing phase rotation of a 3 phase motor is this done at the switchboard?
The phase rotation of motor should be always done from motor side i.e The motor terminal box.
What is the principle of operation of universal motor?
Similar to DC permanent magnet motor (which I'm assuming you understand); except the stator is not a permanent magnet but an electromagnet. There are 2 separate coils on the stator, which are connected in series with the brushes and armature: supply ----- stator segment --- brush - armature - brush --- stator segment ----- return Since the stator coil segments are wired in series with the armature, reversing the supply will *not* change the direction of rotation; as both magnetic fields will reverse together. (But a reversing switch affecting only the armature *will* reverse the rotation.) And since the motor will always turn in the same direction independent of the supply polarity, this means it will work equally well from DC or AC; and the supply frequency will not affect the rotation speed.
Why the motor not start if there has a gas and electric supply?
Possible Faulty wire or even a starter or alternator failure.
How do you change the direction of rotation of synchronous motor?
A synchronous motor aways runs at the synchronous speed, which is the supply frequency divided by the number of pairs of poles in the motor. For a 4-pole motor the speed is 1500 rpm (50 Hz supply) or 1800 rpm (60 Hz supply). The mechanical phase of the rotor is liable to be a little unstable under changing load conditions.
What is the standard direction of rotation of electric motor?
standard direction of rotation of an induction motor is counterclockwise when looking from the front end i.e. non-driving end of the motor.
What is the unit of speed of rotation of a motor?
Motor speed is a term we often use to speak to the rotational speed of a motor. And often we talk about the speed of rotation in revolutions per minute, or RPM.
How can the direction of rotation of a DC shunt motor be reversed?
DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil.
