ET 332b AC Electric Machines and Power
... The series impedance effects of a transformer are identified and measured experimentally. The leakage reactance and the series winding resistances are measured using a method called the short circuit test. These effects are included in a model that more accurately represents the actual operation of ...
... The series impedance effects of a transformer are identified and measured experimentally. The leakage reactance and the series winding resistances are measured using a method called the short circuit test. These effects are included in a model that more accurately represents the actual operation of ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... expensive restart procedures. Voltage dips and their impact on other industrial loads constitute the most prevalent power quality problem in the industrial power sector. Though computer-controlled processes, variable speed drives (VSD) are used the voltage dips have not been eliminated completely. T ...
... expensive restart procedures. Voltage dips and their impact on other industrial loads constitute the most prevalent power quality problem in the industrial power sector. Though computer-controlled processes, variable speed drives (VSD) are used the voltage dips have not been eliminated completely. T ...
Step Versus Servo Motors
... The system block diagram conveniently separates all functional components for the purposes of discussion. It is common for manufacturers to combine functions. For example, controllers often have built in drives, and some have built in power supplies. Some motors have built in encoders, and some have ...
... The system block diagram conveniently separates all functional components for the purposes of discussion. It is common for manufacturers to combine functions. For example, controllers often have built in drives, and some have built in power supplies. Some motors have built in encoders, and some have ...
8_2control
... Analog Input: The interface device can detect a continuously changing electrical voltage coming from sensors which may be responding to changing parameters such as light, sound, liquid levels in tanks, etc. The changing voltage levels are changed to digital numbers to be manipulated and stored in t ...
... Analog Input: The interface device can detect a continuously changing electrical voltage coming from sensors which may be responding to changing parameters such as light, sound, liquid levels in tanks, etc. The changing voltage levels are changed to digital numbers to be manipulated and stored in t ...
Synchronous Generator.
... Machines with cylindrical rotors are typically found in higher speed higher power applications such as turbogenerators. Using 2 or 4 poles, these machines rotate at 3600 or 1800 rpm (with 60hz systems). Salient pole machines are typically found in large (many MW), low mechanical speed applicatio ...
... Machines with cylindrical rotors are typically found in higher speed higher power applications such as turbogenerators. Using 2 or 4 poles, these machines rotate at 3600 or 1800 rpm (with 60hz systems). Salient pole machines are typically found in large (many MW), low mechanical speed applicatio ...
IOSR Journal of Electrical and Electronics Engineering PP 55-62 www.iosrjournals.org
... The simulation of the BLDC motor was done using the software package MATLAB/SIMULINK. For this purpose, the motor’s block diagram was constructed, as shown in Fig.4.1. After running the simulation, the speed, torque, current, input and output power waveforms were recorded and analyzed. The inverter ...
... The simulation of the BLDC motor was done using the software package MATLAB/SIMULINK. For this purpose, the motor’s block diagram was constructed, as shown in Fig.4.1. After running the simulation, the speed, torque, current, input and output power waveforms were recorded and analyzed. The inverter ...
College of Micronesia-FSM
... include the study of sine waves, coils, capacitors, transformers, motors, magnetism, electromagnetic induction, and conductors. ...
... include the study of sine waves, coils, capacitors, transformers, motors, magnetism, electromagnetic induction, and conductors. ...
GCEP Status Review - American Society of Naval Engineers
... density relative to alternative pulsed power systems • M3PS concepts can also provide additional support for the ship power system when not being used for their primary mission load ...
... density relative to alternative pulsed power systems • M3PS concepts can also provide additional support for the ship power system when not being used for their primary mission load ...
Brushed DC Motor Basics
... Shunt-wound brushed DC motors have the performance characteristics of decreasing torque at high speeds and a high but more consistent torque at low speeds. The current in the field coil and in the rotor are independent of one another, thus, the total current of the motor is equal to the sum of the s ...
... Shunt-wound brushed DC motors have the performance characteristics of decreasing torque at high speeds and a high but more consistent torque at low speeds. The current in the field coil and in the rotor are independent of one another, thus, the total current of the motor is equal to the sum of the s ...
Commercial-Industrial Electric Motors
... • Allows distributors and resellers to “work through” existing inventories of current product • Continues to use NEMA standards and table 12‐12 as minimum performance levels protecting end user and ...
... • Allows distributors and resellers to “work through” existing inventories of current product • Continues to use NEMA standards and table 12‐12 as minimum performance levels protecting end user and ...
Digital Control Strategy for Four Quadrant Operation of Three Phase
... BLDC motor has a rotor with permanent magnets and a stator with windings. The Brushless DC motor is driven by rectangular or trapezoidal voltage strokes coupled with the given rotor position. BLDC motors often incorporate either internal or external position sensors to sense the actual rotor positio ...
... BLDC motor has a rotor with permanent magnets and a stator with windings. The Brushless DC motor is driven by rectangular or trapezoidal voltage strokes coupled with the given rotor position. BLDC motors often incorporate either internal or external position sensors to sense the actual rotor positio ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Now a day’s mostly the voltage source inverter fed induction motors are used in many applications. For medium voltage applications like underground mines, electrical submergible pumps and ventilating pumps with high length of feeder the voltage source inverter fed drives are incurs many problems. Th ...
... Now a day’s mostly the voltage source inverter fed induction motors are used in many applications. For medium voltage applications like underground mines, electrical submergible pumps and ventilating pumps with high length of feeder the voltage source inverter fed drives are incurs many problems. Th ...
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.