P2‐CA‐NLH‐3 NLH 2012 Capital Budget Application Page 1 of 1 Re: Unit 1 and Unit 2 Generator Stator Rewind (Tab 2)
... rings of the machine. It is not uncommon for disassembly to cause some damage to ...
... rings of the machine. It is not uncommon for disassembly to cause some damage to ...
In a typical DC motor, there are permanent magnets on the outside
... 100 .!:ill (74 .6 kW ) motor from 1976 takes the same volume as a 7.5 hp (5.5 kW) motor did in 1897 . Currently, the most common induction motor is the cage rotor motor. A 3-phase power supply provides a rotating magnetic field in an induction motor The basic difference between an induction motor an ...
... 100 .!:ill (74 .6 kW ) motor from 1976 takes the same volume as a 7.5 hp (5.5 kW) motor did in 1897 . Currently, the most common induction motor is the cage rotor motor. A 3-phase power supply provides a rotating magnetic field in an induction motor The basic difference between an induction motor an ...
Lecture 7
... (transformer action) into the field windings of the rotor (a DC power source is not required) Although induction machines can be motors or generators they have many disadvantages as generators. Thus, they are referred to typically as induction motors. Most popular type of AC motor ...
... (transformer action) into the field windings of the rotor (a DC power source is not required) Although induction machines can be motors or generators they have many disadvantages as generators. Thus, they are referred to typically as induction motors. Most popular type of AC motor ...
DC Motors and Generators
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
... – 1. Magnetic poles of the magnets do not change – 2. Magnetic poles of the armature can change – 3. Motor can change direction if the voltage to the armature changes • C. DC motors can operate in a clockwise or counterclockwise direction. • D. The strength of the magnetic field affects the speed an ...
The Rules of Electromagnetism
... calculable from "e=Blu" and it is therefore proportional to the motor speed if the field and dimensions are constant. a.c. motors The usual a.c. motor is the three-phase induction motor which, in its usual "squirrel-cage" form, requires no electrical contact between the rotating part (the rotor) and ...
... calculable from "e=Blu" and it is therefore proportional to the motor speed if the field and dimensions are constant. a.c. motors The usual a.c. motor is the three-phase induction motor which, in its usual "squirrel-cage" form, requires no electrical contact between the rotating part (the rotor) and ...
Document
... The starting current is very high which may damage the stator winding. To reduce this heavy starting current, star-delta starting switch is used. For starting, the stator winding are connected up in star via the switch to the supply so that the phase voltage is 1/√3 of the normal voltage. This ...
... The starting current is very high which may damage the stator winding. To reduce this heavy starting current, star-delta starting switch is used. For starting, the stator winding are connected up in star via the switch to the supply so that the phase voltage is 1/√3 of the normal voltage. This ...
Series DC Motors
... Series Motors: Variable speed motor which changes speed drastically from one load condition to another. It has a high starting torque. Applications: hoists, electric trains, conveyors, elevators, electric cars. Compound motors: Variable speed motors. It has a high starting torque and the no-load spe ...
... Series Motors: Variable speed motor which changes speed drastically from one load condition to another. It has a high starting torque. Applications: hoists, electric trains, conveyors, elevators, electric cars. Compound motors: Variable speed motors. It has a high starting torque and the no-load spe ...
Teknologi Elektrik - ENCON
... motors) if the electrical system is AC. •DC machines (generators or motors) if the electrical system is DC. ...
... motors) if the electrical system is AC. •DC machines (generators or motors) if the electrical system is DC. ...
Modern Drive Technology
... inertial loads, consider a line regeneration ("line regen") vector control. The energy or power generated by the motor is put back onto the incoming power line (Figure 2). "Line Regen" controls save energy back to the power line. Additionally, these designs operate near unity power factor, so they p ...
... inertial loads, consider a line regeneration ("line regen") vector control. The energy or power generated by the motor is put back onto the incoming power line (Figure 2). "Line Regen" controls save energy back to the power line. Additionally, these designs operate near unity power factor, so they p ...
Chapter 9: Introduction to Electric Machines
... • Stator would be wound with solenoid that carries the generated energy – there can be more than one windings hence it can generate more than 1 phase of electricity ...
... • Stator would be wound with solenoid that carries the generated energy – there can be more than one windings hence it can generate more than 1 phase of electricity ...
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.