protective device for pumps / motors
... supply, one of the supply lines to the motor becomes dead. However, the motors continue to run on two phases, drawing heavy currents, and burnout. REVERSE RUNNING of pumps and certain machines due to wrong connections or reverse phase sequence endangers the motor and consequently the machine. UNBALA ...
... supply, one of the supply lines to the motor becomes dead. However, the motors continue to run on two phases, drawing heavy currents, and burnout. REVERSE RUNNING of pumps and certain machines due to wrong connections or reverse phase sequence endangers the motor and consequently the machine. UNBALA ...
... The Iris Power Corona ProbeTM Model PPM-97 is a portable, battery operated instrument for off-line detection of partial discharge in rotating machinery. The instrument, with its ferrite probe, is designed to measure partial discharge pulses. The corona probe test is a valuable aid for detecting the ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Other drawbacks such as space or efficiency can be eliminated with the introduction of linear drives. Research is now focused on the invention of new materials and technologies with the ability to directly produce a linear displacement and, simultaneously, is also trying to solve issues related with ...
... Other drawbacks such as space or efficiency can be eliminated with the introduction of linear drives. Research is now focused on the invention of new materials and technologies with the ability to directly produce a linear displacement and, simultaneously, is also trying to solve issues related with ...
Experiment 2
... four. The main difference is that the second phase is turned on before the first phase is turned off. Thus, sometimes both phases are energized at the same time. During the half-steps the rotor is held in between the two full-step positions. A half-step motor has twice the resolution of a full step ...
... four. The main difference is that the second phase is turned on before the first phase is turned off. Thus, sometimes both phases are energized at the same time. During the half-steps the rotor is held in between the two full-step positions. A half-step motor has twice the resolution of a full step ...
Lab Instructions
... assembly – from the motor to the final pulley constructed out of two large gears? Instrumentation Use the power supply that you used for the resistor experiments. Connect to the plus and minus terminals, not the ground terminal. Motor and Gear Rotation Directions Connect the circuit as shown in the ...
... assembly – from the motor to the final pulley constructed out of two large gears? Instrumentation Use the power supply that you used for the resistor experiments. Connect to the plus and minus terminals, not the ground terminal. Motor and Gear Rotation Directions Connect the circuit as shown in the ...
IIR - WDM Next Generation Optical Networking
... and the feedback mechanism of self-control leads to a dynamical system with stability/instability operational conditions. ...
... and the feedback mechanism of self-control leads to a dynamical system with stability/instability operational conditions. ...
ECE 4951
... • Common to take a High-Speed, Low Torque motor (Permanent Magnet) and match it to a Gear Head. ...
... • Common to take a High-Speed, Low Torque motor (Permanent Magnet) and match it to a Gear Head. ...
LabVIEW based Electrical Machines Laboratory for
... Fig. 2. Front Panel of Separately Excited DC Motor During this experiment, the load characteristics like Internal Generated Voltage (EA), Speed (wo), Induced Torque (Tind), Output Power and Efficiency can be evaluated. These self-explanatory results are shown in the given graphs of Fig.’s 3, 4 and 5 ...
... Fig. 2. Front Panel of Separately Excited DC Motor During this experiment, the load characteristics like Internal Generated Voltage (EA), Speed (wo), Induced Torque (Tind), Output Power and Efficiency can be evaluated. These self-explanatory results are shown in the given graphs of Fig.’s 3, 4 and 5 ...
stepper motor - IndiaStudyChannel.com
... Interfacing Stepper motor to 8051 microcontroller A motor is one which translates electrical pulses into mechanical motion. Types of motor are: 1. Stepper Motor 2. DC Motor 3. AC Motor A stepper motor is a special type of electric motor that moves in increments, or steps, rather than turning smoothl ...
... Interfacing Stepper motor to 8051 microcontroller A motor is one which translates electrical pulses into mechanical motion. Types of motor are: 1. Stepper Motor 2. DC Motor 3. AC Motor A stepper motor is a special type of electric motor that moves in increments, or steps, rather than turning smoothl ...
EH35754760
... In the SVPWM algorithm, the total zero voltage vector time is equally distributed between V0 and V7. Also, the zero voltage Vector time is distributed symmetrically at the start and end of the sub cycle in a Symmetrical manner. Thus CSVPWM uses V0, VK, VK+1, V7, VK+1, VK ,V0 sequences for odd sector ...
... In the SVPWM algorithm, the total zero voltage vector time is equally distributed between V0 and V7. Also, the zero voltage Vector time is distributed symmetrically at the start and end of the sub cycle in a Symmetrical manner. Thus CSVPWM uses V0, VK, VK+1, V7, VK+1, VK ,V0 sequences for odd sector ...
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.