Positive and negative are reversed. It will run either direction depending on which way it is wired.
It can't, this is called plugging. The motor should come to a complete stop before reversing its direction. The heat build up in the rotor becomes excessive when plugging and should be used with discretion.See related links below.
What is difference of blocked rotor and locked rotor protection of motor?Read more:What_is_difference_of_blocked_rotor_and_locked_rotor_protection_of_motor
Locked rotor current is the amount of current a motor would draw if you energize the motor and the rotor (the spinning shaft) doesn't spin.
The synchronous motor is made self starting by providing a special winding on the rotor poles, known as damper winding or squirrel cage winding. AC supply given to the stator produces a rotating magnetic field which causes the rotor to rotate, therefore, in the beginning synchronous motor provided with damper winding starts as a squirrel cage induction motor. The exciter moves along the rotor. When the motor attains about 95%of synchronous speed, the rotor winding is connected to exciter terminals and the rotor is magnetically locked by the rotating field of the stator and the motor runs as a synchronous motor. While starting a synchronous motor, the field winding must be shorted through a suitable resistance so that the induced voltage is distributed throughout the whole winding and no part is subjected to the high voltage induced in the entire winding.
explain wound rotor
It can't, this is called plugging. The motor should come to a complete stop before reversing its direction. The heat build up in the rotor becomes excessive when plugging and should be used with discretion.See related links below.
Because in table fan rotor of motor moves with their blade and stator of motor fixed . But in celling fan same opposite rotor fixed then automatically have to move stator of motor . So as the reason both work as opposite direction.....
A motor converts electrical energy into mechanical energy, by creating a moving magnetic field that moves a mechanical "rotor".
The magnet is the stator part of the motor,either as a permanent or an electromagnet.It doldrums the rotor past of the motor towards it causing the rotation.
A fan motor has two parts namely rotor and stator. In a table fan blades are attached to rotor and its movement appears to be clockwise. In a ceiling fan, blades are attached to stator so blades appears to be moving anti clockwise.
The direction an induction motor will turn depends upon the direction of the rotating field setup by the winding. Remember in AC the direction of the current reverses itself 120 times every second for a 60 hz system. So no it will not turn in the "direction" of the current.
The rotor in a DC motor rotates because the magnetic field in either the rotor or the stator is constantly changing. If it is a brush type DC motor, then the rotor field changes as the rotor moves to a new position on the commutator. If it is a brush-less type DC motor, then there is some circuitry associated with the stator that changes the stator field.
A current of electricity flows through some conductors inside the motor. These conductors create a magnetic field which in turn moves the magnet connected to the rotor.
What is difference of blocked rotor and locked rotor protection of motor?Read more:What_is_difference_of_blocked_rotor_and_locked_rotor_protection_of_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.
For conventional flow (plus to minus) FLH rule is for motor action, and FRH rule is for generator action. So you can use FRH rule to determine the direction in which voltages are induced into the rotor by the rotating magnetic field, then use FLH rule to determine the direction in which the resulting forces, due to the rotor-bar currents, will act to rotate the rotor.
The part that rotates inside of an electric motor is called the rotor.