DC and AC Motor Drives
... • DC motors can provide a high starting torque and it is also possible to obtain speed control over a wide range. • The methods of speed control are normally simpler and less expensive than those of AC drives. • DC motors play a significant role in modern industrial drives. • Both series and separat ...
... • DC motors can provide a high starting torque and it is also possible to obtain speed control over a wide range. • The methods of speed control are normally simpler and less expensive than those of AC drives. • DC motors play a significant role in modern industrial drives. • Both series and separat ...
Torque Improvement in Brushed DC Motors by using Four Pole
... These applications predominantly work on low voltage-low power ranges [1] and have space constraints. Hence permanent magnet DC motors (here onwards referred as PMM) offer advantage over conventional field wound DC motors. Typical range of voltage for PMM is from 6V to 48V depending on application. ...
... These applications predominantly work on low voltage-low power ranges [1] and have space constraints. Hence permanent magnet DC motors (here onwards referred as PMM) offer advantage over conventional field wound DC motors. Typical range of voltage for PMM is from 6V to 48V depending on application. ...
EE28 SEIG GUI - Copy
... Pout : Output electrical power II.INTRODUCTION The squirrel-cage induction motor which can be performed as Self Excited Induction Generator (SEIG) is best suitable for standalone wind energy conversation system due to their several advantages as their low capital and maintenance cost, rugged constru ...
... Pout : Output electrical power II.INTRODUCTION The squirrel-cage induction motor which can be performed as Self Excited Induction Generator (SEIG) is best suitable for standalone wind energy conversation system due to their several advantages as their low capital and maintenance cost, rugged constru ...
Reliability in motion
... Motor Terms • RPM is the rotational speed of the motor under full load conditions. It will always be less than the synchronous speed Ex 1800 rpm 4 pole motor will operate in the 1755 to 1765 rpm range. • Design – Torque profile ...
... Motor Terms • RPM is the rotational speed of the motor under full load conditions. It will always be less than the synchronous speed Ex 1800 rpm 4 pole motor will operate in the 1755 to 1765 rpm range. • Design – Torque profile ...
chap02_dc machines_230107
... that produce the main flux in the machines. The magnetic field of the field winding is approximately sinusoidal, thus AC voltage is induced in the armature winding as the rotor turns under the magnetic field of stator. The COMMUTATOR and BRUSH combination converts the AC generated voltages to DC. ...
... that produce the main flux in the machines. The magnetic field of the field winding is approximately sinusoidal, thus AC voltage is induced in the armature winding as the rotor turns under the magnetic field of stator. The COMMUTATOR and BRUSH combination converts the AC generated voltages to DC. ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.