![Introduction, Features and Applications](http://s1.studyres.com/store/data/004586942_1-cdd6fd543da6417d98b2b017f782a918-300x300.png)
Introduction, Features and Applications
... torque output will be more stable at higher speeds. This configuration is also referred to as half chopper. In setting the driver output current multiply the specified per phase (or unipolar) current rating by 1.4 to determine the peak output current. ...
... torque output will be more stable at higher speeds. This configuration is also referred to as half chopper. In setting the driver output current multiply the specified per phase (or unipolar) current rating by 1.4 to determine the peak output current. ...
A Mathematical Model to Choose Optimal Subsynchronous
... the diode rectifier toward the thyristor inverter. The inverter converts the direct current into the alternative current, which is then sent back to the power network by the transformer. Therefore, the slip power, which in previous versions of the speed control systems (control by rotor resistors) t ...
... the diode rectifier toward the thyristor inverter. The inverter converts the direct current into the alternative current, which is then sent back to the power network by the transformer. Therefore, the slip power, which in previous versions of the speed control systems (control by rotor resistors) t ...
Switched Reluctance Motors
... properly adjusting on/off angles the motor can achieve operation over the nominal speed. ...
... properly adjusting on/off angles the motor can achieve operation over the nominal speed. ...
DC motor-1st Order
... Unhook the wires running from the power supply to the motor. Using a digital multimeter, verify that the input voltage is 24 volts. With the same multimeter, measure the internal resistance across the motor. Reattach the motor to the power supply. Attach the moment arm to the load (the disk), and br ...
... Unhook the wires running from the power supply to the motor. Using a digital multimeter, verify that the input voltage is 24 volts. With the same multimeter, measure the internal resistance across the motor. Reattach the motor to the power supply. Attach the moment arm to the load (the disk), and br ...
performance of three phase induction motor using modified stator
... Alternating current supplied to the primary winding from an electric power system includes an opposing current in the secondary winding, when the latter is short circuited or closed through external impedance. Relative motion between the primary and secondary structure is produced by electromagnetic ...
... Alternating current supplied to the primary winding from an electric power system includes an opposing current in the secondary winding, when the latter is short circuited or closed through external impedance. Relative motion between the primary and secondary structure is produced by electromagnetic ...
chap02_dc machines_260107
... 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. ...
servo control facts
... motor to rotate at the same speed (in synchronization) as the stator field. There are basically two types of synchronous motors: self excited ( as the induction motor) and directly excited (as with permanent magnets). The self excited motor (may be called reluctance synchronous) includes a rotor wit ...
... motor to rotate at the same speed (in synchronization) as the stator field. There are basically two types of synchronous motors: self excited ( as the induction motor) and directly excited (as with permanent magnets). The self excited motor (may be called reluctance synchronous) includes a rotor wit ...
GMD is the name of a series of bipolar chopper drives - Q-TECH
... DIN 41612 form D connector. They are therefore designed to be assembled inside a RACK, complete with motherboard, that could be possibly supplied as an option by R.T.A. R.T.A. experience, together with a careful design for these specific purposes, has led to a very reliable component, easy to use, w ...
... DIN 41612 form D connector. They are therefore designed to be assembled inside a RACK, complete with motherboard, that could be possibly supplied as an option by R.T.A. R.T.A. experience, together with a careful design for these specific purposes, has led to a very reliable component, easy to use, w ...
CHAPTER 4 – AC Machinery Fundamentals
... mmf. The more slots there are and the more closely spaced the slots are, the better this approximation becomes. In practice, it is not possible to distribute windings exactly as in the nC equation above, since there are only a finite number of slots in a real machine and since only integral numbers ...
... mmf. The more slots there are and the more closely spaced the slots are, the better this approximation becomes. In practice, it is not possible to distribute windings exactly as in the nC equation above, since there are only a finite number of slots in a real machine and since only integral numbers ...
Commercial-Industrial Electric Motors
... • Each induction motor is built with pairs of poles – north and south • The more poles the slower the motor speed – 2 pole = 3600 RPM – 4 pole = 1800 RPM – 6 pole =1200 RPM ...
... • Each induction motor is built with pairs of poles – north and south • The more poles the slower the motor speed – 2 pole = 3600 RPM – 4 pole = 1800 RPM – 6 pole =1200 RPM ...
Generadores Indar
... INDAR Electric develops and manufactures electrical rotating machines to respond to customer needs. Its experience is shown in the thousands of Indar Electric generators in operation all over the world. Cooperation with the customer is part of the company's philosophy, through special personal atten ...
... INDAR Electric develops and manufactures electrical rotating machines to respond to customer needs. Its experience is shown in the thousands of Indar Electric generators in operation all over the world. Cooperation with the customer is part of the company's philosophy, through special personal atten ...
Mavilor Motors Company
... So the conclusion is that the minimum mechanical angular velocity and the bandwidth of the control set the relation between the maximum permisible speed imbalance as a consequence of the tacho fluctuations and the number of laminations to be used. In addition, we shall have to see whether or not the ...
... So the conclusion is that the minimum mechanical angular velocity and the bandwidth of the control set the relation between the maximum permisible speed imbalance as a consequence of the tacho fluctuations and the number of laminations to be used. In addition, we shall have to see whether or not the ...
Sérgio CRUZ 1,2 , Flávio GASPAR 2
... When the inertia of the load is very high, the speed oscillations of the motor will be very small, and that ellipse will tend to a circumference. On the other hand, for extremely low values of the inertia, the ellipse tends to degenerate into a straight line oriented along the second quadrant of th ...
... When the inertia of the load is very high, the speed oscillations of the motor will be very small, and that ellipse will tend to a circumference. On the other hand, for extremely low values of the inertia, the ellipse tends to degenerate into a straight line oriented along the second quadrant of th ...
summary of topics
... 41A.1 Three motors are to be stalled, and the locked rotor wattage of each measured. The same three motors are to be run no-load. The sample exhibiting the highest wattage in either condition is then to be either locked in a stationary position using a means of low thermal conductivity or allowed to ...
... 41A.1 Three motors are to be stalled, and the locked rotor wattage of each measured. The same three motors are to be run no-load. The sample exhibiting the highest wattage in either condition is then to be either locked in a stationary position using a means of low thermal conductivity or allowed to ...
01423-04.2 Identifying Electric Motors
... engine, the engine can be replaced with an electric motor of about 2/3 to 3/4 as much horsepower as the engine. C. Example to replace a 2 hp gasoline engine (2 X 2/3 = 4/3C select a 1 ½ hp electric motor). ...
... engine, the engine can be replaced with an electric motor of about 2/3 to 3/4 as much horsepower as the engine. C. Example to replace a 2 hp gasoline engine (2 X 2/3 = 4/3C select a 1 ½ hp electric motor). ...
cuk_converter
... refrigerators, vacuum cleaners, freezers, etc. For household appliance, usually we prefer historical classic electric motor technologies such as single phase AC induction motor, including split phase, capacitor-start, capacitor–run types, and universal motor. These classic motors typically are opera ...
... refrigerators, vacuum cleaners, freezers, etc. For household appliance, usually we prefer historical classic electric motor technologies such as single phase AC induction motor, including split phase, capacitor-start, capacitor–run types, and universal motor. These classic motors typically are opera ...
Commutator (electric)
![](https://commons.wikimedia.org/wiki/Special:FilePath/Universal_motor_commutator.jpg?width=300)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.