Why is the efficiency of a shaded pole motor low?
The shaded pole motor characteristics include the following. Efficiency is low due to power loss in the shading coil. Depending on the shaded coil position, the direction of rotation depends.
What is the advantage of a shaded pole motor?
The shaded pole induction motor produces a very small starting torque about 50% of full load torque. The efficiency of the shaded pole motor is low because of continuous power loss in the shading coil. It is suitable for small devices which require low starting torque.
What is the highest HP for a shaded pole motor?
Although low in efficiency, with low starting torque, because of the inherent LOW COST, these motors abound in the proper residential applications. The output capability of a shaded pole motor will range from “sub-fractional HP” i.e. 1/30 HP to a maximum of 1/4 or 1/3 HP.
Is shaded pole motor self-starting?
Shaded pole motor is a self-starting motor because it is a small squirrel-cage motor in which the auxiliary winding is composed of a copper ring or bar surrounding a portion of each pole.
What is the principle of universal motor?
The direction of the magnetic field and the direction of armature current reverse so that the direction of force experienced by armature conductors remains the same. Thus, regardless of AC or DC supply, universal motors work on the same principle that DC series motors work on.
What is the highest HP for a single phase motor?
Large Single-Phase Motors
The largest single-phase motors suitable for residential use top out at 10 horsepower. A few commercial applications may be found for higher voltage single-phase motors at up to 15 horsepower, but these are rare and require 480 volts of single-phase current to operate.
Which power is mentioned on a nameplate of a motor?
Which power is mentioned on a name plate of a motor? Explanation: Name plate of the motor shows rated values i.e. rated speed, rated current, rated voltage. It also shows output power available at shaft when all other quantities are set to rated values.