PowerPoint presentation
... field speed • Motor runs a synchronous speed whatever the mechanical load provided rotor field is strong enough ...
... field speed • Motor runs a synchronous speed whatever the mechanical load provided rotor field is strong enough ...
Word Work File L_987757493
... - Spring resists motion of coil - When force from spring is equal to force from motor, needle is still - Depending on resistance of circuit, different scale is read ...
... - Spring resists motion of coil - When force from spring is equal to force from motor, needle is still - Depending on resistance of circuit, different scale is read ...
Closed Form Computation of Electromagnetic Fields in Induction
... significantly and finite element analysis (FEA) on rotating machines is not only possible, but also commonly used to formulate mathematical models [21], [22] and verify designs. Even magneto-mechanical phenomena can be analysed using FEA [23]. 2D and 3D FEA can be performed when the cost of the machin ...
... significantly and finite element analysis (FEA) on rotating machines is not only possible, but also commonly used to formulate mathematical models [21], [22] and verify designs. Even magneto-mechanical phenomena can be analysed using FEA [23]. 2D and 3D FEA can be performed when the cost of the machin ...
Introduction - City University of New York
... Applied Motion Products: Step/DC motors and drives, ...
... Applied Motion Products: Step/DC motors and drives, ...
DC Motors
... Large AC generator •Unlike our generator model with a fixed magnetic field and rotating armature, it is more practical to fix the armature windings and rotate the magnetic field on large generators. •Brushes and slip rings pass EXCITATION voltage to the field windings on the rotor to create the mag ...
... Large AC generator •Unlike our generator model with a fixed magnetic field and rotating armature, it is more practical to fix the armature windings and rotate the magnetic field on large generators. •Brushes and slip rings pass EXCITATION voltage to the field windings on the rotor to create the mag ...
Electric Motors
... Electric Circuits An electric circuit is an electrical path that begins at a power source and ends up back at the power source. The component that is being powered by the source is called the load. ...
... Electric Circuits An electric circuit is an electrical path that begins at a power source and ends up back at the power source. The component that is being powered by the source is called the load. ...
Chapter 29 Electromagnetic Induction
... In a sense a DC generator is a motor run in reverse Back EMF in a motor. Motor back EMF ultimately limits the motor speed Back EMF reduces voltage available to drive the motor Hence the motor current is less with speed – torque drops ...
... In a sense a DC generator is a motor run in reverse Back EMF in a motor. Motor back EMF ultimately limits the motor speed Back EMF reduces voltage available to drive the motor Hence the motor current is less with speed – torque drops ...
Ecosystem for Optimizing Energy Efficiency in Factory Production
... All of the above motors are used in industry, depending on power and application requirements, but the asynchronous induction motor is by far the most common by virtue of its simple construction and ease of use. Permanent magnet synchronous motors have a higher torque to weight ratio and the low ine ...
... All of the above motors are used in industry, depending on power and application requirements, but the asynchronous induction motor is by far the most common by virtue of its simple construction and ease of use. Permanent magnet synchronous motors have a higher torque to weight ratio and the low ine ...
March
... 7. A thin rectangular plate 350mm by 250mm is totally covered on both sides with nickel 0.12mm thick in 8.25h.The current required would, if supplied to a voltmeter, cause 0.0805kg of silver to be deposited in 1h.If the E.C.E of nickel is 30410-9 kg/C,calculate the density of nickel in kg/m3 , if ...
... 7. A thin rectangular plate 350mm by 250mm is totally covered on both sides with nickel 0.12mm thick in 8.25h.The current required would, if supplied to a voltmeter, cause 0.0805kg of silver to be deposited in 1h.If the E.C.E of nickel is 30410-9 kg/C,calculate the density of nickel in kg/m3 , if ...
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.