When a magnetic material undergoes cyclic magnetization, two kinds of... on it. Hysteresis and eddy current losses are called as... UNIT- I DC MACHINES
... The rotor receives same electrical power in exactly the same way as the secondary of a two winding transformer receiving its power from primary. That is why induction motor is called as rotating transformer. 4. Why an induction motor never runs at its synchronous speed? If it runs at sy.speed then ...
... The rotor receives same electrical power in exactly the same way as the secondary of a two winding transformer receiving its power from primary. That is why induction motor is called as rotating transformer. 4. Why an induction motor never runs at its synchronous speed? If it runs at sy.speed then ...
Spindle Drive System Troubleshooting
... Contactors, if present. Loose or shorting connections will cause intermittent Over Current and other faults. Impedance (the opposition to the flow of an electric current through a conductor) is one of the common causes for misdiagnosis. The motor looses torque by not being able to receive the needed ...
... Contactors, if present. Loose or shorting connections will cause intermittent Over Current and other faults. Impedance (the opposition to the flow of an electric current through a conductor) is one of the common causes for misdiagnosis. The motor looses torque by not being able to receive the needed ...
Speed Control for DC motor
... Armature Reaction • Effect on flux distribution: Neutral plane shift – when a load connected to the machines a resulting magnetic field produced in the armature – If the armature is rotated at a speed by an external torque each armature coil experiences a change in flux t as it rotates. – A v ...
... Armature Reaction • Effect on flux distribution: Neutral plane shift – when a load connected to the machines a resulting magnetic field produced in the armature – If the armature is rotated at a speed by an external torque each armature coil experiences a change in flux t as it rotates. – A v ...
4 Point Starter
... contact with studs 2, 3, 4 etc., thus gradually cutting off the series resistance from the armature circuit as the motor gathers speed. Finally when the starter handle is in 'RUN' position, the entire starting resistance is eliminated and the motor runs with normal speed. This is because back emf is ...
... contact with studs 2, 3, 4 etc., thus gradually cutting off the series resistance from the armature circuit as the motor gathers speed. Finally when the starter handle is in 'RUN' position, the entire starting resistance is eliminated and the motor runs with normal speed. This is because back emf is ...
Motor Quality Guide your questions answered
... can be as low as 60-80° C, while lower quality motors can run in excess of 90° C. Although this still meets the criteria of Class B temperature rise, it could run considerably hotter than a quality motor of the same size. Theoretically, a reduction of 10-15° should double the life of the winding, as ...
... can be as low as 60-80° C, while lower quality motors can run in excess of 90° C. Although this still meets the criteria of Class B temperature rise, it could run considerably hotter than a quality motor of the same size. Theoretically, a reduction of 10-15° should double the life of the winding, as ...
Using your VZ-7 - Surplus City Liquidators
... Hook-Up. The VZ-7 receives its power from the furnace or air handler being tested. Start by disconnecting the power in the equipment. Next, squeeze the ends of the 5 wire power connector on the motor. This gives access to the unlocking tab on the 16-pin motor connector. Press the tab and disconnect ...
... Hook-Up. The VZ-7 receives its power from the furnace or air handler being tested. Start by disconnecting the power in the equipment. Next, squeeze the ends of the 5 wire power connector on the motor. This gives access to the unlocking tab on the 16-pin motor connector. Press the tab and disconnect ...
E x p e r i m e n t -... I n t r o d u c t i... E l e c t r i c - D...
... o Actual Speed of the motor from W_mech subsystem which is inside the Simulink control-system. You can open the subsystem W_mech; you will observe how the input port INC1 (DS1104ENC_POS_C1) of CP 1104 is utilized to read the actual speed of the motor. In the actual system, this port is connected (ha ...
... o Actual Speed of the motor from W_mech subsystem which is inside the Simulink control-system. You can open the subsystem W_mech; you will observe how the input port INC1 (DS1104ENC_POS_C1) of CP 1104 is utilized to read the actual speed of the motor. In the actual system, this port is connected (ha ...
Optimal design of switched reluctance motors
... Torque ripple is another frequently quoted problem with the switched reluctance motor. Indeed, it can be said that it produces torque by amplifying what is known as cogging torque—a parasitic “nuisance torque”—in other machines. At low speed it can be “controlled out” by shaping the current waveform ...
... Torque ripple is another frequently quoted problem with the switched reluctance motor. Indeed, it can be said that it produces torque by amplifying what is known as cogging torque—a parasitic “nuisance torque”—in other machines. At low speed it can be “controlled out” by shaping the current waveform ...
High speed PMSM control without speed encoder based on
... Based on theses limit equations, the field weakening zone can be exploited. Fig (1) presents two types of circles one for the current limitation and one for the voltage limitation condition. The radius of the voltage limitation is proportional to the speed inverses. Effectively, when the speed incre ...
... Based on theses limit equations, the field weakening zone can be exploited. Fig (1) presents two types of circles one for the current limitation and one for the voltage limitation condition. The radius of the voltage limitation is proportional to the speed inverses. Effectively, when the speed incre ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
... Abstract : The Adjustable Speed Drives (ADS) are generally used in industry. In most drives AC motors are applied. The standard drives used are Induction Motors (IM) and recently Permanent Magnet Synchronous Motors (PMSM) are also used. Developments in power electronics and semiconductor technology ...
... Abstract : The Adjustable Speed Drives (ADS) are generally used in industry. In most drives AC motors are applied. The standard drives used are Induction Motors (IM) and recently Permanent Magnet Synchronous Motors (PMSM) are also used. Developments in power electronics and semiconductor technology ...
Calculation of Distributed Magnetic Flux Density under the Stator
... Abstract This paper proposed an analytical model for the distributed magnetic field analysis of interior permanent magnet-type blush-less direct current motors under the stator-turn fault condition using the winding function theory. Stator-turn faults cause significant changes in electric and magnet ...
... Abstract This paper proposed an analytical model for the distributed magnetic field analysis of interior permanent magnet-type blush-less direct current motors under the stator-turn fault condition using the winding function theory. Stator-turn faults cause significant changes in electric and magnet ...
Paper - Asee peer logo
... Lab 4: Load Characteristics of a Separately-Excited Shunt Generator Lab #3 has no load connected to the armature terminals of the dc generator. The objective of Lab 4 is to discover the effect that loading has on the terminal voltage of a separately-excited DC generator at rated speed and rated fiel ...
... Lab 4: Load Characteristics of a Separately-Excited Shunt Generator Lab #3 has no load connected to the armature terminals of the dc generator. The objective of Lab 4 is to discover the effect that loading has on the terminal voltage of a separately-excited DC generator at rated speed and rated fiel ...
B.E 3/4 - II Semester
... relays, Protection of generator and transformer using percentage differential relays, Split phase, Inter turn protection, Overheating, Loss of excitation, Protection of generators, Protection of transformers against magnetizing inrush, Buchholz relay, Protection of earthing transformers, Generator t ...
... relays, Protection of generator and transformer using percentage differential relays, Split phase, Inter turn protection, Overheating, Loss of excitation, Protection of generators, Protection of transformers against magnetizing inrush, Buchholz relay, Protection of earthing transformers, Generator t ...
LAP WINDING
... Figure from Principles of Electric Machines and Power Electronics, 2nd Edition, P.C. Sen, John Wiley and Sons, 1997. Figure represents an unrolled lap winding of a dc armature, along with the commutator segments (bars) and stationary brushes. Coils are added in series until the end of the last coil ...
... Figure from Principles of Electric Machines and Power Electronics, 2nd Edition, P.C. Sen, John Wiley and Sons, 1997. Figure represents an unrolled lap winding of a dc armature, along with the commutator segments (bars) and stationary brushes. Coils are added in series until the end of the last coil ...
QUALITROL-IRIS POWER IS THE WORLD’S LARGEST PROVIDER OF MONITORING AND
... detection of shorted turns can also be frustratingly ineffective due to the frequently intermittent nature of the faults at speed and at standstill. These off-line tests are also time-consuming, tying up resources and personnel that, ...
... detection of shorted turns can also be frustratingly ineffective due to the frequently intermittent nature of the faults at speed and at standstill. These off-line tests are also time-consuming, tying up resources and personnel that, ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... The function of the prime mover and the energy transmitting device is to impart the motion and operate actual apparatus. The most commonly used prime mover is, of course an electric motor, since it is far superior in performance to steam, hydraulic, diesel and other types of engines. Electric motors ...
... The function of the prime mover and the energy transmitting device is to impart the motion and operate actual apparatus. The most commonly used prime mover is, of course an electric motor, since it is far superior in performance to steam, hydraulic, diesel and other types of engines. Electric motors ...
AC motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.