Internet Resources
... few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of al ...
... few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of al ...
1. General - Saunalahti.fi
... LF1. C5, D1 and D2 form a voltage doubler that rises the output of T1 from 2 to 4 kV AC. C6, D3 and D4 implement the same function for T2. The total voltage developed upon SG1 is therefore 8 kV AC. C1-C4 and R1-R4 are snubbers to protect D1-D4 from voltage transients. Motor MG1 rotates the RSG1 rota ...
... LF1. C5, D1 and D2 form a voltage doubler that rises the output of T1 from 2 to 4 kV AC. C6, D3 and D4 implement the same function for T2. The total voltage developed upon SG1 is therefore 8 kV AC. C1-C4 and R1-R4 are snubbers to protect D1-D4 from voltage transients. Motor MG1 rotates the RSG1 rota ...
Keywords: simulation, short
... The resulting simulated behaviour of the short-circuit current corresponds to the theoretical assumptions (Fig. 2). The shortcircuit current characteristics begins in zero, then rapidly reaches the maximum value of the short-circuit current at 790 A, in a period of 0,002s. The influences of the chan ...
... The resulting simulated behaviour of the short-circuit current corresponds to the theoretical assumptions (Fig. 2). The shortcircuit current characteristics begins in zero, then rapidly reaches the maximum value of the short-circuit current at 790 A, in a period of 0,002s. The influences of the chan ...
Slide 1
... Armature Reaction – Compensating Winding • The armature mmf distorts the flux density distribution and also produces the demagnetizing effect known as armature reaction. • Much of the rotor mmf can be neutralized by using a compensating winding, which is fitted in slots cut on the main pole faces. ...
... Armature Reaction – Compensating Winding • The armature mmf distorts the flux density distribution and also produces the demagnetizing effect known as armature reaction. • Much of the rotor mmf can be neutralized by using a compensating winding, which is fitted in slots cut on the main pole faces. ...
A Novel Permanent Magnetic Angular Acceleration Sensor
... There exists obvious angular acceleration when the single-phase asynchronous motor is working, which can be detected by the sensor, and the frequency of angular acceleration is about 100 Hz, which is doubled as excitation voltage frequency. The angular acceleration generated by single-phase asynchro ...
... There exists obvious angular acceleration when the single-phase asynchronous motor is working, which can be detected by the sensor, and the frequency of angular acceleration is about 100 Hz, which is doubled as excitation voltage frequency. The angular acceleration generated by single-phase asynchro ...
High Efficiency AC–AC Power Electronic Converter Applied to
... Héctor Sarnago, Member, IEEE, Arturo Mediano, Senior Member, IEEE, and Óscar Lucia, Member, IEEE ...
... Héctor Sarnago, Member, IEEE, Arturo Mediano, Senior Member, IEEE, and Óscar Lucia, Member, IEEE ...
SINAMICS Drives
... With SINAMICS, Siemens offers you a platform that optimally complies with the high requirements in the low-voltage, medium-voltage and DC-voltage ranges. The complete and integrated drive family addresses all of the performance levels and sets itself apart as a result of the highest degree of flexib ...
... With SINAMICS, Siemens offers you a platform that optimally complies with the high requirements in the low-voltage, medium-voltage and DC-voltage ranges. The complete and integrated drive family addresses all of the performance levels and sets itself apart as a result of the highest degree of flexib ...
1) INTRODUCTION
... techniques are used to control the motor from zero and low speed up to full speed operation. The selfsensing technique is used at zero and low speeds to start the machine, then the control is switched to a back-EMF based sensor less technique for the normal higher speed operating range of the machin ...
... techniques are used to control the motor from zero and low speed up to full speed operation. The selfsensing technique is used at zero and low speeds to start the machine, then the control is switched to a back-EMF based sensor less technique for the normal higher speed operating range of the machin ...
![TOPIC: 191005 KNOWLEDGE: K1.01 [2.8/3.1]](http://s1.studyres.com/store/data/008853629_1-aaf66ccca12a2cb572e420053ca11f28-300x300.png)
TOPIC: 191005 KNOWLEDGE: K1.01 [2.8/3.1]
... The cooling water system is being returned to service following maintenance on the pumps. Each pump is driven by an identical three-phase AC induction motor. Pump A was started five minutes ago to initiate flow in the cooling water system. Pump B is about to be started. When pump B is started, which ...
... The cooling water system is being returned to service following maintenance on the pumps. Each pump is driven by an identical three-phase AC induction motor. Pump A was started five minutes ago to initiate flow in the cooling water system. Pump B is about to be started. When pump B is started, which ...
TDA1085C Universal Motor Speed Controller
... from 0 to the maximum speed. If VPin 6 = 0, only the high acceleration ramp occurs. To get a real zero speed position, Pin 5 has been designed in such a way that its voltage from 0 to 80 mV is interpreted as a true zero. As a consequence, when changing the speed set position, the designer must be su ...
... from 0 to the maximum speed. If VPin 6 = 0, only the high acceleration ramp occurs. To get a real zero speed position, Pin 5 has been designed in such a way that its voltage from 0 to 80 mV is interpreted as a true zero. As a consequence, when changing the speed set position, the designer must be su ...
Motor Control of an Oscillating Pendulum
... Smaller pulses • Slower the oscillation = Larger pulses ...
... Smaller pulses • Slower the oscillation = Larger pulses ...
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.