Generators and transformers
... used in power transmission may be as much as 99.5% efficient. Where electronics are being used, low voltage ac supplies are usually required so step-down transformers will be an essential part of the power supply. The output from a transformer is ac, so there will have to be some form of rectificati ...
... used in power transmission may be as much as 99.5% efficient. Where electronics are being used, low voltage ac supplies are usually required so step-down transformers will be an essential part of the power supply. The output from a transformer is ac, so there will have to be some form of rectificati ...
SCON-CA/CAL/CGAL/CB/CGB First Step Guide Seventh Edition
... • 3 times of the rated current may flow to the controller during the acceleration/deceleration. Select an interrupter that does not trip with this value of current. If a trip occurs, select an interrupter that possesses the rated current of one grade higher. (Refer to the operation characteristics c ...
... • 3 times of the rated current may flow to the controller during the acceleration/deceleration. Select an interrupter that does not trip with this value of current. If a trip occurs, select an interrupter that possesses the rated current of one grade higher. (Refer to the operation characteristics c ...
- LJMU Research Online
... achieve zero average voltage in the x-y plane in addition to the zero CMV, the vectors of the outer two decagons of the αβ plane are selected to generate the reference voltages. In a five-phase system one needs to apply five space vectors in a switching period [1] in order to control both planes. Th ...
... achieve zero average voltage in the x-y plane in addition to the zero CMV, the vectors of the outer two decagons of the αβ plane are selected to generate the reference voltages. In a five-phase system one needs to apply five space vectors in a switching period [1] in order to control both planes. Th ...
Design Document Ver 1.0 - WordPress@UP
... platform based on flexible, easy-to-use hardware and software”. This will function as the “brain” of the device by performing logic on the information from the photoresistors to determine which stepper motor to move, and sending voltage and current measurements from the solar panels to the display. ...
... platform based on flexible, easy-to-use hardware and software”. This will function as the “brain” of the device by performing logic on the information from the photoresistors to determine which stepper motor to move, and sending voltage and current measurements from the solar panels to the display. ...
Embedded Magnetorquer Coil Design for Micro
... combinations of coils. The value of J for microsatellite is 6.23 kg m2. The torque generated by 4 coils in parallel is 944.6 μNm, which takes 204 s to rotate satellite through an angle of 90◦. In the case of 1 and 4 coils connected in series, generated torque is 354.2 μNm, which takes 333.1 s to rot ...
... combinations of coils. The value of J for microsatellite is 6.23 kg m2. The torque generated by 4 coils in parallel is 944.6 μNm, which takes 204 s to rotate satellite through an angle of 90◦. In the case of 1 and 4 coils connected in series, generated torque is 354.2 μNm, which takes 333.1 s to rot ...
Numerical Analysis of the Magnetic Field of High
... facilitating very efficient way of evacuating power from the generator units, especially in case of, e.g., hydro power plants, where generator units are housed in a cavern [1–3]. Gas-insulated transmission lines (GIL) represent a high voltage electric power transmission technology suitable for very ...
... facilitating very efficient way of evacuating power from the generator units, especially in case of, e.g., hydro power plants, where generator units are housed in a cavern [1–3]. Gas-insulated transmission lines (GIL) represent a high voltage electric power transmission technology suitable for very ...
Study and Simulation of Current Controlled PWM Inverters
... output voltages and currents remain within desired margins. Current in this case and the nature of current (both magnitude and phase) will be dependent on the connected load. The VSI in these cases is being operated as a voltage source. With modern inverter technology such as in high performance vec ...
... output voltages and currents remain within desired margins. Current in this case and the nature of current (both magnitude and phase) will be dependent on the connected load. The VSI in these cases is being operated as a voltage source. With modern inverter technology such as in high performance vec ...
Targeted LTE Solutions for Siemens Generators
... exceptional operating conditions. Cases that might be considered “exceptional conditions” include: • Stress corrosion cracking due to chemical conditions that should not be the normal operating environment of large electrical generators. These include long-term exposure to saturated sodium chloride ...
... exceptional operating conditions. Cases that might be considered “exceptional conditions” include: • Stress corrosion cracking due to chemical conditions that should not be the normal operating environment of large electrical generators. These include long-term exposure to saturated sodium chloride ...
Electrical Installations Lab AEL-1 Advanced Electrical Laboratories (AEL-LABS):
... SCADA Systems - SCADA. Control Software: Software designed to control different applications that require an advance control system, such as generation systems remote control, distribution systems with control over power flows and isolating switches, etc. It is included if the application required i ...
... SCADA Systems - SCADA. Control Software: Software designed to control different applications that require an advance control system, such as generation systems remote control, distribution systems with control over power flows and isolating switches, etc. It is included if the application required i ...
Microsoft Word - AnytimeCE.com
... 19. A transformer that has a number of taps or coils on the primary side that allow it to be used with a variety of different primary line voltages is called a/n ______ transformer. isolation step-up step-down ...
... 19. A transformer that has a number of taps or coils on the primary side that allow it to be used with a variety of different primary line voltages is called a/n ______ transformer. isolation step-up step-down ...
Frequently Asked Questions (FAQs)
... Circuit Protectors (MCP), require that the VFD be listed as a combination in order to be used as a motor branch circuit disconnect or for branch circuit protection. In addition, most VFDs do not have combination ratings above 5kA with MCPs or circuit breakers. It may be possible to achieve a high SC ...
... Circuit Protectors (MCP), require that the VFD be listed as a combination in order to be used as a motor branch circuit disconnect or for branch circuit protection. In addition, most VFDs do not have combination ratings above 5kA with MCPs or circuit breakers. It may be possible to achieve a high SC ...
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.