Question

what is wctric motor​

Answer 1

Explanation:

converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of rotation of a shaft. Electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as a power grid, inverters or electrical generators. An electric generator is mechanically identical to an electric motor, but operates in the reverse direction, converting mechanical energy into electrical energy.

Electric motors may be classified by considerations such as power source type, internal construction, application and type of motion output. In addition to AC versus DC types, motors may be brushed or brushless, may be of various phase (see single-phase, two-phase, or three-phase), and may be either air-cooled or liquid-cooled. General-purpose motors with standard dimensions and characteristics provide convenient mechanical power for industrial use. The largest electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors are found in industrial fans, blowers and pumps, machine tools, household appliances, power tools and disk drives. Small motors may be found in electric watches.

In certain applications, such as in regenerative braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction.

Electric motors produce linear or rotary force (torque) intended to propel some external mechanism, such as a fan or an elevator. An electric motor is generally designed for continuous rotation, or for linear movement over a significant distance compared to its size. Magnetic solenoids produce significant mechanical force, but over an operating distance comparable to their size. Transducers such as loudspeakers and microphones convert between electrical current and mechanical force to reproduce signals such as speech. When compared with common internal combustion engines (ICEs), electric motors are lightweight, physically smaller, provide more power output, are mechanically simpler and cheaper to build, while providing instant and consistent torque at any speed, with more responsiveness, higher overall efficiency and lower heat generation. However, electric motors are not as convenient or common as ICEs in mobile applications (i.e. cars and buses) as they require a large and expensive battery, while ICEs require a relatively small fuel tank.

Answer 2

WHAT IS ELECTRIC MOTOR ???

Explanation:

Electric motor is a device which can change Electric energy into mechanical energy

PRINCIPAL OF MOTER :

WHEN A RECTANGULAR COIL IS PLACED IN A MAGNETIC FIELD AND CURRENT IS PASSED THROUGH IT A FORCE ACTS ON THE QUARREL WHICH ROTATES ITs CONTINUOUSLY .

CONSTRUCTION :

a) Coil : it is rectangular coil of insulated copper wire having large number of turns .

b) a large permanent magnet provides strong magnetic field set its pole pieces equal roots belt this pole pieces.

c) Split Rings : the two ends of the coil are connected by two split rings which are two halves of slip rings

WORKING OF ELECTRIC

MOTER:

As shown in the figure when a current is passed through the coil PQRS the quarrel will starts rotating anticlockwise because a downward force acts on the length PQ and at the same time and upward force acts on RS.

therefore, the quarrel rotates in anticlockwise direction in the length PQ, current flows from P to q and magnetic field text from left to right.

therefore, the quarrel rotates in anticlockwise direction in the length PQ, current flows from P to q and magnetic field text from left to right.according to Fleming's left hand rule a downward force acts on length RS these two forces causes the choir to rotate anticlockwise.

when coil complete half rotation, the position of PQ and RS interchange the half ring D comes in contact with brushes a and half ring comes in contact therefore the direction of current in coil PQRS gets reversed .

now the current flows through the coil in the direction as rqp direction of the current through the coil PQRS reverse after every half rotation.

as a result declared rotates in same direction the split rings helps to reverse the direction of current in the circuit.

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