MAGNETIC EFFECTS OF CURRENT
... magnet. When the coil rotates, it cuts the lines of magnetic force, due to which a current is induced in the generator coil. This current can be used to run various electrical appliances. Construction Of D.C. Generator A simple D.C. Generator consists of the following: An armature coil of copper wir ...
... magnet. When the coil rotates, it cuts the lines of magnetic force, due to which a current is induced in the generator coil. This current can be used to run various electrical appliances. Construction Of D.C. Generator A simple D.C. Generator consists of the following: An armature coil of copper wir ...
- aes journals
... armature is on the stator. In BLDC motor, field excitation is provided by a permanent magnet and commutation is achieved electronically instead of using mechanical commutators and brushes. In BLDC motor, the mechanical ‘rotating switch’ or commutator/brush gear assembly is replaced by an external el ...
... armature is on the stator. In BLDC motor, field excitation is provided by a permanent magnet and commutation is achieved electronically instead of using mechanical commutators and brushes. In BLDC motor, the mechanical ‘rotating switch’ or commutator/brush gear assembly is replaced by an external el ...
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... Introduction – Constructional features and differences in respect of cage and wound rotor types. Principle of working & self starting features, actual rotor speed and synchronous speed, slip. Effect of loading on slip – frequency and magnitude of rotor EMF and reactance – Expression for rotor curren ...
... Introduction – Constructional features and differences in respect of cage and wound rotor types. Principle of working & self starting features, actual rotor speed and synchronous speed, slip. Effect of loading on slip – frequency and magnitude of rotor EMF and reactance – Expression for rotor curren ...
An evaluation of electric motors for ship propulsion Bassham, Bobby A. 2003-06
... An evaluation was conducted of the various propulsion motors being considered for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion options being considered by the U.S. Navy have been described in one document. The AC induction motor, AC synchronous motor, Hig ...
... An evaluation was conducted of the various propulsion motors being considered for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion options being considered by the U.S. Navy have been described in one document. The AC induction motor, AC synchronous motor, Hig ...
Series/Parallel worksheet 2
... 1. Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series. 2. Calculate the total resistance for ten 120 ohm resistors in series. 3. A string of fifty 15 ohm Christmas tree lights are connected in series. One burns out, they all burn out. Calculate the t ...
... 1. Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series. 2. Calculate the total resistance for ten 120 ohm resistors in series. 3. A string of fifty 15 ohm Christmas tree lights are connected in series. One burns out, they all burn out. Calculate the t ...
VR21 regulator troubleshooting
... typically 300 VDC at 240 VAC or 155 VDC at 120 VAC. The filter/choke and DC bank portions of the board are easily identifiable by wide, tinned-copper, circuit paths. From the DC bank, positive current leaves the positive end (Q2 collector), passes through the exciter field as modulated by the MOSFET ...
... typically 300 VDC at 240 VAC or 155 VDC at 120 VAC. The filter/choke and DC bank portions of the board are easily identifiable by wide, tinned-copper, circuit paths. From the DC bank, positive current leaves the positive end (Q2 collector), passes through the exciter field as modulated by the MOSFET ...
SB800 - Marathon Motors Basic Training Manual
... DC motors have extremely high torque capabilities and can be used in conjunction with relatively simple solid state control devices to give programmed acceleration and deceleration over a wide range of selected speeds. Because the speed of a DC motor is not dependent on the number of poles, there is ...
... DC motors have extremely high torque capabilities and can be used in conjunction with relatively simple solid state control devices to give programmed acceleration and deceleration over a wide range of selected speeds. Because the speed of a DC motor is not dependent on the number of poles, there is ...
How to use VSD in existing HVAC installations T able of contents
... Accidents may happen causing damage to motor cable, which then short circuits. ...
... Accidents may happen causing damage to motor cable, which then short circuits. ...
Improving the Starting Performance of Large Salient-Pole Synchronous Machines
... field-circuit formulation by using end-leakage reactances and the end winding resistances as external circuit parameters. The model of Fig. 6 has 29 574 elements and 15 279 nodes. The selection of mesh density is a tradeoff between the desired accuracy of the results and the computer CPU times. An a ...
... field-circuit formulation by using end-leakage reactances and the end winding resistances as external circuit parameters. The model of Fig. 6 has 29 574 elements and 15 279 nodes. The selection of mesh density is a tradeoff between the desired accuracy of the results and the computer CPU times. An a ...
PDF
... signal is aligned to the peak of some line-to-neutral voltage. This is highly inconvenient, since what is desired is alignment to line-to-line voltage. There is an encoder as well. However, it is 500 pulses per revolution (500 ppr). This is not evenly divisible by three, so it would not be convenien ...
... signal is aligned to the peak of some line-to-neutral voltage. This is highly inconvenient, since what is desired is alignment to line-to-line voltage. There is an encoder as well. However, it is 500 pulses per revolution (500 ppr). This is not evenly divisible by three, so it would not be convenien ...
Remote Lawn Mower
... An H bridge is an electronic circuit which enables the current to flow in either direction. The H-bridge consists of four transistor arranged in H shape (see figure 1). A transistor is an electronic switch which can be turned on or off by applying the appropriate voltage. This Hbridge consists of tw ...
... An H bridge is an electronic circuit which enables the current to flow in either direction. The H-bridge consists of four transistor arranged in H shape (see figure 1). A transistor is an electronic switch which can be turned on or off by applying the appropriate voltage. This Hbridge consists of tw ...
Navy Electricity and Electronics Training Series
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
Review Game
... current through a flashlight bulb for 5.0 minutes, while a 1.5-volt, C cell supplies 750 milliamperes of current through the same flashlight bulb for 20 minutes. Compared to the total charge transferred by the AAA cell through the bulb, the total charge transferred by the C cell through the bulb is ...
... current through a flashlight bulb for 5.0 minutes, while a 1.5-volt, C cell supplies 750 milliamperes of current through the same flashlight bulb for 20 minutes. Compared to the total charge transferred by the AAA cell through the bulb, the total charge transferred by the C cell through the bulb is ...
motor protection tables
... A motor control circuit is a circuit of a control apparatus or system that carries the electric signal directing the performance of the controller (430.71). It does not carry the main power current. A control circuit tapped on the load-side of the motor branch circuit fuse which controls the motor o ...
... A motor control circuit is a circuit of a control apparatus or system that carries the electric signal directing the performance of the controller (430.71). It does not carry the main power current. A control circuit tapped on the load-side of the motor branch circuit fuse which controls the motor o ...
General - Sicme Motori
... catalogues refer to use as variable speed motors connected to three-phase, fully-controlled bridge (6 or 12 thyristors) or, for frames 80-112 only, to single-phase bridge also. The performance ratings concerning use as generator will be given upon request. A.08 ...
... catalogues refer to use as variable speed motors connected to three-phase, fully-controlled bridge (6 or 12 thyristors) or, for frames 80-112 only, to single-phase bridge also. The performance ratings concerning use as generator will be given upon request. A.08 ...
Brushed DC electric motor
A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electric power to driving mechanical energy,and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field. Depending on the connections of the field to the power supply, the speed and torque characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills. Since the brushes wear down and require replacement, brushless DC motors using power electronic devices have displaced brushed motors from many applications