4. Power limitation control at high marine currents
... 4. Power limitation control at high marine currents In many industrial projects (Sabella, OPENHYDRO, ALSTOM-Beluga) fixed pitch turbine are used to reduce the maintenance constraints and increase the robustness. So when the marine current speed is higher than the rated value, a fixed-pitch MCT is no ...
... 4. Power limitation control at high marine currents In many industrial projects (Sabella, OPENHYDRO, ALSTOM-Beluga) fixed pitch turbine are used to reduce the maintenance constraints and increase the robustness. So when the marine current speed is higher than the rated value, a fixed-pitch MCT is no ...
Why specify a Short Circuit and Coordination Study?
... Short Circuit and Coordination Study serves to incorporate all the system changes that come about after the initial design. Some examples of factors that commonly change in the implementation of a system are: the utility available fault level, size and/or transformer impedance values, conductor size ...
... Short Circuit and Coordination Study serves to incorporate all the system changes that come about after the initial design. Some examples of factors that commonly change in the implementation of a system are: the utility available fault level, size and/or transformer impedance values, conductor size ...
Overload Relays
... allow harmless temporary overloads (such as motor starting) without disrupting the circuit ...
... allow harmless temporary overloads (such as motor starting) without disrupting the circuit ...
G050486-00 - DCC
... METHOD: a stepping motor,which will move its own mass by means of a threaded shaft G050486-00-R ...
... METHOD: a stepping motor,which will move its own mass by means of a threaded shaft G050486-00-R ...
examination branch question bank
... 12 conductors per slot when driven at 1200 rpm the flux per pole is 0.02 wb? A 6 pole lap wound dc generator has 600 conductors on its armature flux perpole is 0.02 wb. Calculate i. The speed at which the generator must be run to generate 300v. ii. What would be the speed if the generated were wave ...
... 12 conductors per slot when driven at 1200 rpm the flux per pole is 0.02 wb? A 6 pole lap wound dc generator has 600 conductors on its armature flux perpole is 0.02 wb. Calculate i. The speed at which the generator must be run to generate 300v. ii. What would be the speed if the generated were wave ...
Design and construction of a polygon
... and developed in the laboratory. The winding details of the developed autotransformers are given in Appendix B. Various tests have been conducted under Three-phase voltages with phase to phase rms value of 380 volts and an equivalent resistive load. Input voltage and current waveforms and harmonic s ...
... and developed in the laboratory. The winding details of the developed autotransformers are given in Appendix B. Various tests have been conducted under Three-phase voltages with phase to phase rms value of 380 volts and an equivalent resistive load. Input voltage and current waveforms and harmonic s ...
American National Standard Motors and Generators
... Part 12, Section II 12.59 Addition of RANDOM WOUND Table 12-11 Addition of (RANDOM WOUND) to open and enclosed motor table title Table 12-12 Removed open and enclosed motor table efficiency values for 6 pole 300-500HP motors and added 8 pole efficiency values Table 12-13 Removed table efficiency val ...
... Part 12, Section II 12.59 Addition of RANDOM WOUND Table 12-11 Addition of (RANDOM WOUND) to open and enclosed motor table title Table 12-12 Removed open and enclosed motor table efficiency values for 6 pole 300-500HP motors and added 8 pole efficiency values Table 12-13 Removed table efficiency val ...
Traction Permanent Magnet Synchronous Motor Torque Control with
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
... has to meet special requirements typical for overhead line fed vehicles. The drives and specially their control should be robust to wide overhead line voltage tolerance (typically from -30 % to +20 %), voltage surges and input filter oscillations. These aspects may cause problems during flux weakeni ...
Aalborg Universitet Disturbance Observer-Based Simple Nonlinearity Compensation for Matrix Converter Drives
... This paper presents a new method to compensate the nonlinearity for matrix converter drives using disturbance observer. The nonlinearity of matrix converter drives such as commutation delay, turn-on and turn-off time of switching device, and on-state switching device voltage drop is modeled by distur ...
... This paper presents a new method to compensate the nonlinearity for matrix converter drives using disturbance observer. The nonlinearity of matrix converter drives such as commutation delay, turn-on and turn-off time of switching device, and on-state switching device voltage drop is modeled by distur ...
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.