Synchronous motor speed

Assuming that the motor is up to synchronous speed , as the sine wave changes to positive in Figure above (1), the lower north coil pushes the north rotor pole, while the upper south coil attracts that rotor north pole. The speed at which an induction motor will operate depends on the input power frequency and the number of electrical magnetic poles in the motor. Depending on motor design, the actual mechanical speed may be equivalent ( synchronous motor ) or slightly smaller (asynchronous motor).

Slip rings and brushes are used to conduct current to the rotor. The rotor poles connect to each other and move at the same speed - hence the name synchronous motor.

Synchronous speed is the speed by which the magnetic field in the stator of an induction motor is changing or rotating.

Full load speed and Rated speed of an induction.

We have discussed here synchronous speed in materials in details along with its basic concept. Among the classic examples of this phenomenon is that of induction motors and asynchronous motors. All induction motors are asynchronous motors. The asynchronous nature of induction- motor operation comes from the slip between the rotational speed of the stator field and somewhat slower speed of . Clearly you have to apply power to the motor and you have to apply enough supply voltage to overcome motor losses. Once you do that the motor works synchronously off-load but when mechanical load is applied to the shaft there has to be enough current in the source to be able to supply mechanical . What you are looking here at is an asynchronous (induction) motor.

Help us to make future videos for you. Working of synchronous motor is elaborately explained in this video animation. This video explains how constant speed characteristics of synchronous motor . Along with it concept of number of poles of electri. A machine which runs at synchronous speed is called synchronous machine.

The Synchronous Speed is denoted as Ns. AC synchronous motors are the workhorses of industry. This speed can be varied by varying the frequency, although most applications simply use gearing . International Conference on Industrial Engineering.

Automatic control system of speed of synchronous motor. Low- speed synchronous motors provide highly precise speed regulation, low- speed rotation and quick bi-directional rotation. The basic construction of low- speed synchronous motors is the same as that of stepper motors.

Since they can be driven by an AC power supply, they are sometimes called AC stepper motors.