Shaded Pole Induction Motor
The various applications of the Shaded Poles Motor are as follows: They are suitable for small devices like relays and fans because of its low cost and easy starting. Used in exhaust fans, hair dryers and also in table fans. Used in air conditioning and refrigeration equipment and cooling fans. The applications of the shaded pole motor include the following. Relays, Fans and other small devices due to its low cost; Exhaust fans; Hairdryers; Table fans; Cooling fans; Refrigerators; Air conditioners; Projectors; Record players; Tape recorders; Photocopying machines and many more. FAQs. 1). How do I identify a shaded pole motor?
Shaded Pole Induction Motor is a type of single-phase motor consists of a stator and a cage-type rotor. It is a self-starting motor. It is also called as Shaded Pole Motor. Shaded pole motor is a salient-pole, split phase type, squirrel cage rotor single phase induction motor provided with one or more auxiliary uses stator winding is placed in magnetic position from the main winding.
The fig. It is made of fod and cage-rotor. The stator consists of salient poles or projected poles called mainpoles. The supply winding forms main winding on the mainpoles. The poles are divided into two unequal halves. The smaller portion a carries the copper band and is called a shaded portion arf the pole. On the smaller part, a single turn copper ring is fitted. This copper ring is known as a shading poel. The mainpole part on which this shading coil is fitted is known as shading pole.
When single-phase supply is applied, an alternating flux is generated in the core. A fraction of this flux links with the shaded coil. The variation in the flux induces the voltage in the coil. Since this shaded portion is short-circuited, the circulating current is produced in it in such a direction to oppose the main flux. The circulating current develops the flux in the ring which opposes the main core flux of the motor. The flux induces in the shaded portion of the motor, i.
The flux in shaded pole lags behind the flux in the unshaded pole. Since there are space and time displacement between the two fluxes, the rotating magnetic field is now that what i call music 2. Due to this rotating field, a torque is developed on the cage rotor.
The direction of rotating magnetic field and hence flux is from unshaded portion to shaded portion of the mainpole. In a shaded-pole motor, the reversal of the direction of rotation is not how to cheaply frame a poster. The reversal of the direction of rotation, where desired, can be achieved by providing two shading coils, one on each end of every pole, and by open-circuiting one set of shading coils and how to deliver a presentation ppt short-circuiting the other set.
Construction is simple and robust because there is no centrifugal switch. The speed reversal is also difficult and expensive as it requires another set of copper rings. Shaded Pole Induction Motor is used to drive the devices which require low starting torque. Record players, tape recorders, projectors, photocopying machines. Used in air conditioning and refrigeration equipment and cooling fans. Used for starting electronic clocks and single-phase synchronous timing motors.
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Jan 22, · The term "shaded-pole motor" typically refers to one of the simplest alternating-current, single-phase induction motors used today. Typical configurations essentially consist of a rotor assembly and a stator pole. As an induction motor, this motor relies on electromagnetic forces to generate torque. Single Phase Induction Motors are widely used in modern days. Shaded Pole Induction Motor is a single phase induction motor which can run without the capacitor that is why it is called Capacitor Less Single-phase Induction Motor. In this post, we are going to learn about Construction, Working, and Application of Shaded Pole Induction Motor. Jun 03, · The shading coil (from which the motor has derived its name) consists of low-resistance copper links embedded in one side of each stator pole, which are used to provide the necessary starting torque. When the current increases in the main coils, a current is induced in the shading coil.
A universal motor is a single-phase series motor, which is able to run on either alternating current ac or direct current dc and the characteristics are similar for both ac and dc. The field windings of a series motors are connected in series with the armature windings.
The electrical design areas of a universal motor are the magnetic circuit, the field and armature windings, the commutator and brushes, the insulation and the cooling system.
A Shaded Pole motor is an AC single phase induction motor. The auxiliary winding, which is composed of a copper ring, is called a shading coil. The current in this coil delay the phase of magnetic flux in that part of the pole in order to provide a rotating magnetic field.
The direction of rotation is from the unshaded side to the shaded ring. Synchronous ac motors are constant-speed electric motors and they operate in synchronism with line frequency. The speed of a synchronous motor is determined by the number of pairs of poles and is always a ratio of the line frequency.
AC Motors: Principle of Operation. Universal Motors A universal motor is a single-phase series motor, which is able to run on either alternating current ac or direct current dc and the characteristics are similar for both ac and dc. The field windings of a series motors are connected in series with the armature windings Basic principles of Universal Motors.
Commutation Process of Universal Motors. Performance Characteristics of Universal Motors. Basic principles of Shaded Pole Motor. Rotating field of a Shaded Pole Motor. Basic principles of Synchronous Motors.