CONSTANT FREQUENCY-UNIFIED POWER QUALITY
... shunt active filters are used to compensate the voltage, current imbalance and harmonics. In order to avoid the switching oscillation, passive filters are placed at the output of each inverter. At the output of shunt inverter a high pass second order LC filter is placed and the output of series inve ...
... shunt active filters are used to compensate the voltage, current imbalance and harmonics. In order to avoid the switching oscillation, passive filters are placed at the output of each inverter. At the output of shunt inverter a high pass second order LC filter is placed and the output of series inve ...
Test Procedure for the NCV898031SEPGEVB Evaluation Board
... 1. Connect a DC input voltage, within the 6 V to 40 V range, between VIN and GND. 2. Connect a DC enable voltage, within the 2.0 V to 5.0 V range, between EN/SYNC and GND. 3. The demo board feedback components were selected for continuous operation at rated 7 V/1.22 A output power at a minimum input ...
... 1. Connect a DC input voltage, within the 6 V to 40 V range, between VIN and GND. 2. Connect a DC enable voltage, within the 2.0 V to 5.0 V range, between EN/SYNC and GND. 3. The demo board feedback components were selected for continuous operation at rated 7 V/1.22 A output power at a minimum input ...
High-Frequency Power Conversion for Machine Drive Applications
... Sinusoidal output voltage, low harmonic distortion output current waveform – reduced losses in driven machine. Possibility of eliminating screened cables – desirable in many applications, reduces installation cost. Filter cut-off frequency can be placed outside controller bandwidth. ...
... Sinusoidal output voltage, low harmonic distortion output current waveform – reduced losses in driven machine. Possibility of eliminating screened cables – desirable in many applications, reduces installation cost. Filter cut-off frequency can be placed outside controller bandwidth. ...
Exam 3 Practice
... reactance of j1.0 ohms per phase. Assume the armature resistance (Ra) is zero. The field current is set to produce a terminal voltage of 480V (line–line) at full load. At full load the machine supplies 60 amps at 1.0 power factor. a)(1) Sketch the per phase equivalent circuit showing the field and a ...
... reactance of j1.0 ohms per phase. Assume the armature resistance (Ra) is zero. The field current is set to produce a terminal voltage of 480V (line–line) at full load. At full load the machine supplies 60 amps at 1.0 power factor. a)(1) Sketch the per phase equivalent circuit showing the field and a ...
The Dirty Half Dozen
... neutrals and transformers Voltage distortion can cause timing errors Nuisance tripping GFRs ...
... neutrals and transformers Voltage distortion can cause timing errors Nuisance tripping GFRs ...
Individual Group Control (IGC) 4N1 Motor Controller
... Multiple IGC 4n1 Motor Controllers can be daisy-chained together for simplified synchronized control from a single keypad. The IGC 4n1 Motor Controller can not set upper and lower motor limits, but senses the current to identify them. ...
... Multiple IGC 4n1 Motor Controllers can be daisy-chained together for simplified synchronized control from a single keypad. The IGC 4n1 Motor Controller can not set upper and lower motor limits, but senses the current to identify them. ...
asymmetrical multilevel inverter for higher output
... voltage levels with same number of H-bridges, but with different input voltage ratios. The ideal nature of input dc voltage sources is shown as an advantage in this paper. For a single-phase seven-level inverter, 12 power electronic switches are required in both the diode-clamped and the fling-capac ...
... voltage levels with same number of H-bridges, but with different input voltage ratios. The ideal nature of input dc voltage sources is shown as an advantage in this paper. For a single-phase seven-level inverter, 12 power electronic switches are required in both the diode-clamped and the fling-capac ...
Wind Turbine Simulation
... The wind turbine will supply the battery bank when the voltage is below 24V The turbine will not exceed power ratings on load ...
... The wind turbine will supply the battery bank when the voltage is below 24V The turbine will not exceed power ratings on load ...
Uninterrupted Motive Power Supply (UMPS) Catalogue
... supply. The backup time during loss of input will vary with the size of the battery bank installed. The motor starting current is limited to 110% to 150% of FLA depending on the application. Smooth starting of the load avoids jerk to mechanical parts, reducing maintenance. Motor speed remains ...
... supply. The backup time during loss of input will vary with the size of the battery bank installed. The motor starting current is limited to 110% to 150% of FLA depending on the application. Smooth starting of the load avoids jerk to mechanical parts, reducing maintenance. Motor speed remains ...
Abstract - JPInfotech
... Diode-assisted buck–boost voltage source inverter (VSI) boosts the dc source voltage by introducing diode-assisted capacitor network. With parallel capacitive charging and series capacitive discharging, the new topology extends voltage regulation range and avoids extreme duty ratio of switching devi ...
... Diode-assisted buck–boost voltage source inverter (VSI) boosts the dc source voltage by introducing diode-assisted capacitor network. With parallel capacitive charging and series capacitive discharging, the new topology extends voltage regulation range and avoids extreme duty ratio of switching devi ...
LINE FOLLOWER ROBOT
... with variable duty cycle is applied to the enable pins. Rapidly switching the voltage between Vs and GND gives an effective voltage between Vs and GND whose value depends on the duty cycle of PWM ...
... with variable duty cycle is applied to the enable pins. Rapidly switching the voltage between Vs and GND gives an effective voltage between Vs and GND whose value depends on the duty cycle of PWM ...
abstract - Innovetech
... high-frequency losses, and system instability. Conventionally, with a given switching frequency and rated voltage, the current ripple can be reduced by increasing the dc-link inductor, but it leads to bulky size, high cost and slow dynamic response. In order to solve this problem, this project revea ...
... high-frequency losses, and system instability. Conventionally, with a given switching frequency and rated voltage, the current ripple can be reduced by increasing the dc-link inductor, but it leads to bulky size, high cost and slow dynamic response. In order to solve this problem, this project revea ...
Exercise 1 - Portal UniMAP
... (c) What will the magnitude of the line current be if the power factor is adjusted to 0.8 leading? (IL = 62.5 A) ...
... (c) What will the magnitude of the line current be if the power factor is adjusted to 0.8 leading? (IL = 62.5 A) ...
BBA IInd SEMESTER EXAMINATION 2008-09
... speed is 375 revolutions per minute. Calculate the frequency and line induced emf assuming full pitched coil. A 3-phase squirrel cage induction motor takes a starting current of 6 times the full load current. Find the starting torque as a percentage of full load torque if the motor is started using ...
... speed is 375 revolutions per minute. Calculate the frequency and line induced emf assuming full pitched coil. A 3-phase squirrel cage induction motor takes a starting current of 6 times the full load current. Find the starting torque as a percentage of full load torque if the motor is started using ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.