Quick Answer: What Are The Factors To Be Considered While Selecting A Motor?

Which kind of motor is used in a fan?

induction motorIn conventional ceiling fans, single phase induction motor is used.

These motors consume minimum power and hence, are also known as fractional kilowatt motors.

A single phase induction motor requires only one power phase for operating.

It converts the electrical energy from the power input into mechanical energy..

What is motor protection device?

The protection unit or the device is use to disconnect the motor from the voltage source or the power source in case the voltage drops down below the rated value for the motor. The motor operates again whenever the voltage is balance to the normal value.

What are the two factors influencing the speed of induction motor?

Motor Speed The speed of an AC motor depends on the frequency of the input power and the number of poles for which the motor is wound.

Why series motor is never started on no load?

A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage. The motor can be damaged by overspeed.

Which motor is used in tramways?

Dc motorDc motor (Ma) and induction motor (Mc) are currently manufactured and used in 105 N tram drive, their parameters are available. Dc motor (Mb), brushless motor (Me) and slip-ring motor (Md) pa- rameters have been determined by analysis.

Why safety is so important in the workplace?

A safe and healthy workplace not only protects workers from injury and illness, it can also lower injury/illness costs, reduce absenteeism and turnover, increase productivity and quality, and raise employee morale. In other words, safety is good for business. Plus, protecting workers is the right thing to do.

What are the factors governing the selection of motors?

Factors governing selection of motorselectric drive motors.Nature of electric supply.Individual drive.Motor speed.Electrical characteristics of motor.Motor.Mechanical considerations (motor-maintenance)Jan 11, 2018

What 3 components are required to create a motor?

No matter the type of motor, there are three basic parts: a stator, a commutator, and a rotor. Together they use electromagnetism to cause the motor to spin. As long as the motor receives steady current, the motor works.

What are the basic elements of a simple electric motor?

A simple motor has the following parts:A power supply – mostly DC for a simple motor.Field Magnet – could be a permanent magnet or an electromagnet.An Armature or rotor.Commutator.Brushes.Axle.

What are two main components of an electric motor?

Every electric motor has two essential parts: one stationary, and one that rotates. The stationary part is the stator. Though configurations vary, the stator is most often a permanent magnet or row of magnets lining the edge of the motor casing, which is usually a round plastic drum.

What is main function of capacitor in single phase motor What are the safety rules in electrical workshop?

A single phase induction motor cannot produce a rotating torque.So in order to start the motor by increasing the starting torque capacitor is used. Answer: Starting torque in single phase induction motor is 0. A capacitor is used to develop starting torque by creating a phase shift between the currents.

How can we increase motor power?

There are, however, ways to increase the power factor, which are:Purchase motors with an inherently high power factor.Do not select over-sized motors (the power factor decreases with reduced motor load)Install power factor correction capacitors (Motor running capacitors*) in parallel with motor windings.More items…•Nov 1, 2011

Which motor should not be started on no load?

A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage. The motor can be damaged by overspeed.

What is the role of a simple motor?

Motors turn electrical energy into rotational motion called torque. … The simple motor built in class uses a coil that is a temporary electromagnet. This coil gets the force to help create torque from the electrical current supplied by the battery.

Which motor has highest no load speed?

DC series motorExplanation: At no load, armature current tends to zero, flux φ tends to zero, where speed is inversely proportional to the flux, speed will tend to infinity. Thus, no load speed of DC series motor is highest.

When load is removed motor will run at the highest speed?

1 Answer. When load is removed, series motor will run at the highest speed.

What are the three types of motors?

Some of the most common electric motors used today include:AC Brushless Motors. AC brushless motors are some of the most popular in motion control. … DC Brushed Motors. In a DC brushed motor, brush orientation on the stator determines current flow. … DC Brushless Motors. … Direct Drive. … Linear Motors. … Servo Motors. … Stepper Motors.Jun 9, 2016

What factors affect motor performance?

Motor performance depends on three elements such as voltage across terminals, resistance across terminals, and magnetic force. Various factors that affect these elements and change motor performance will be discussed here by way of giving some specific examples.

What safety considerations should be considered when working with motors?

Safety RulesYou should always keep your work area clean and well lit.All motors include many small parts; keep very young children away from your work area.Motors spin very fast; always wear safety goggles.Super Glue, provided with most of the kits, is “instant bonding”.More items…

Which motor is used in lathe machine?

DC shunt motorDC shunt motor is used for driving constant speed line shafts, lathes, vacuum cleaners, wood-working machines, laundry washing machines, elevators, conveyors, grinders and small printing presses etc.

What is the reason to determine the motor loading?

The higher the frequency, the faster a motor runs. The more poles the motor has, the slower it runs. Table 1 indicates typical synchronous speeds. By using a tachometer to measure actual motor speed, it is possible to calculate motor loads.