IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... The issue of power quality has become very critical because of the loads which are sensitive to power quality disturbances. Different loads like adjustable speed drives, energy-efficient lighting etc are major causers and the major victims of power quality problems. All of these devices and other re ...
... The issue of power quality has become very critical because of the loads which are sensitive to power quality disturbances. Different loads like adjustable speed drives, energy-efficient lighting etc are major causers and the major victims of power quality problems. All of these devices and other re ...
BDTIC
... both, charging and discharging paths. Figure 3 presents calculated efficiency values as a function of the charging current using a 50A 650V IGBT device from the TRENCHSTOPTM 5 family [3]. A DC link voltage of 400V and a battery voltage of 150V have been assumed. As it can be seen, efficiency levels ...
... both, charging and discharging paths. Figure 3 presents calculated efficiency values as a function of the charging current using a 50A 650V IGBT device from the TRENCHSTOPTM 5 family [3]. A DC link voltage of 400V and a battery voltage of 150V have been assumed. As it can be seen, efficiency levels ...
Simulation of Merged AC and DC System for Power
... the HVDC system helps in improving the stability and economy of each grid which is connected to each other through this HVDC link. As, said above in the paragraph the low voltage transmission for long distance in DC system is inefficient thus, AC systems are used there but again because of the use o ...
... the HVDC system helps in improving the stability and economy of each grid which is connected to each other through this HVDC link. As, said above in the paragraph the low voltage transmission for long distance in DC system is inefficient thus, AC systems are used there but again because of the use o ...
The desired DC voltage increase from 420 to 600 V is shown in
... fluctuations on the Variable Frequency Drive output voltage are clearly observed on the bottom plot. These represent a severe power quality issue which can produce damage to the DC motor if this condition is not properly detected and action taken to disconnect the DC drive from the power supply. Sim ...
... fluctuations on the Variable Frequency Drive output voltage are clearly observed on the bottom plot. These represent a severe power quality issue which can produce damage to the DC motor if this condition is not properly detected and action taken to disconnect the DC drive from the power supply. Sim ...
A Low Cost High Power, High Voltage, 150MHz Solid State Amplifier
... that the gate and drain bias circuitry described in the technical note would not support this. Furthermore we wished to control the device such that it was not active during the “off” period. We would use a limited charge storage arrangement to provide the DC bias, and turning the device off would g ...
... that the gate and drain bias circuitry described in the technical note would not support this. Furthermore we wished to control the device such that it was not active during the “off” period. We would use a limited charge storage arrangement to provide the DC bias, and turning the device off would g ...
7154 VFD - Cincinnati State
... resonant frequency of approximately 1 to 1.5 kHz and frequencies higher than that will be absorbed by the filter and not passed on to the motor. Of course it is important that the inverter switching frequency be set to 5khz to prevent excessive filter current and drive malfunction. In fact, it has b ...
... resonant frequency of approximately 1 to 1.5 kHz and frequencies higher than that will be absorbed by the filter and not passed on to the motor. Of course it is important that the inverter switching frequency be set to 5khz to prevent excessive filter current and drive malfunction. In fact, it has b ...
LM79XX.PDF
... The LM79XX series of 3-terminal regulators is available with fixed output voltages of b5V, b8V, b12V, and b15V. These devices need only one external componentÐa compensation capacitor at the output. The LM79XX series is packaged in the TO-220 power package and is capable of supplying 1.5A of output ...
... The LM79XX series of 3-terminal regulators is available with fixed output voltages of b5V, b8V, b12V, and b15V. These devices need only one external componentÐa compensation capacitor at the output. The LM79XX series is packaged in the TO-220 power package and is capable of supplying 1.5A of output ...
Visible Loadbreak Technology Offers Safer Operation with Visual Verification of Electrical Disconnect Without Entering the Low Voltage Compartment 10/1/13 Read more
... “Nearly every maintenance procedure on a transformer requires manually entering the live compartment and wearing protective equipment in order to ensure the circuit is properly isolated,” said Jack Moore, associate global product director, Substation and Underground Transformers, Eaton’s Cooper Powe ...
... “Nearly every maintenance procedure on a transformer requires manually entering the live compartment and wearing protective equipment in order to ensure the circuit is properly isolated,” said Jack Moore, associate global product director, Substation and Underground Transformers, Eaton’s Cooper Powe ...
SAMPLE ELECTRICAL PI QUESTIONS 1. Why heat produce in AC
... and hysteresis in the core. Copper loss is a constant after the coil has been wound and therefore a measurable loss. Hysteresis loss is constant for a particular voltage and current. Eddy-current loss, however, is different for each frequency passed through the transformer. 34. Define IDMT relay? An ...
... and hysteresis in the core. Copper loss is a constant after the coil has been wound and therefore a measurable loss. Hysteresis loss is constant for a particular voltage and current. Eddy-current loss, however, is different for each frequency passed through the transformer. 34. Define IDMT relay? An ...
AD8210 AD8274 AD780
... (Continued from first page) "Circuits from the Lab" are intended only for use with Analog Devices products and are the intellectual property of Analog Devices or its licensors. While you may use the "Circuits from the Lab" in the design of your product, no other license is granted by implication or ...
... (Continued from first page) "Circuits from the Lab" are intended only for use with Analog Devices products and are the intellectual property of Analog Devices or its licensors. While you may use the "Circuits from the Lab" in the design of your product, no other license is granted by implication or ...
DS460S Electrical Specifications
... DC OK threshold is defined as when the 12 V output is greater than 11.5 V. DC not OK threshold is defined as when the 12 V output is less than 11.4 V & greater than 11.3 V. Provides both the load sharing function (as a feedback for output regulation droop function) and 12 V output current informatio ...
... DC OK threshold is defined as when the 12 V output is greater than 11.5 V. DC not OK threshold is defined as when the 12 V output is less than 11.4 V & greater than 11.3 V. Provides both the load sharing function (as a feedback for output regulation droop function) and 12 V output current informatio ...
Aalborg Universitet Parallel Inverters in Islanded Microgrids
... present the inherent drawback of needing to calculate instantaneous active and reactive powers, thus needing for low-pass filters to average values which bandwidth will impact the system transient response [16]. Even in the case of three-phase systems that the active and reactive power can be calcul ...
... present the inherent drawback of needing to calculate instantaneous active and reactive powers, thus needing for low-pass filters to average values which bandwidth will impact the system transient response [16]. Even in the case of three-phase systems that the active and reactive power can be calcul ...
HIGH-LEVEL MULTI-STEP INVERTER OPTIMIZATION, USING A
... with the addition that higher voltage levels can be achieved [1-5]. Multi-level inverters can operate not only with PWM techniques but also with amplitude modulation (AM), improving significantly the quality of the output voltage waveform. With the use of amplitude modulation, low frequency voltage ...
... with the addition that higher voltage levels can be achieved [1-5]. Multi-level inverters can operate not only with PWM techniques but also with amplitude modulation (AM), improving significantly the quality of the output voltage waveform. With the use of amplitude modulation, low frequency voltage ...
lec2
... represented by a voltage of 5 V in digital systems. A voltage of 0 V is used for the 0 level. • An oscilloscope can be used to observe the rapidly changing voltage-versus-time waveform in digital systems. ...
... represented by a voltage of 5 V in digital systems. A voltage of 0 V is used for the 0 level. • An oscilloscope can be used to observe the rapidly changing voltage-versus-time waveform in digital systems. ...
Minimizing oscillations in the Diode
... • Using different SiC JFETs will not affect performance that much. • A drawback is that short-circuit currents will occur and this increases the switching losses. • The short-circuit currents can be reduced by different means. ...
... • Using different SiC JFETs will not affect performance that much. • A drawback is that short-circuit currents will occur and this increases the switching losses. • The short-circuit currents can be reduced by different means. ...
Power inverter
A power inverter, or inverter, is an electronic device or circuitry that changes direct current (DC) to alternating current (AC).The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry. The inverter does not produce any power; the power is provided by the DC source.A power inverter can be entirely electronic or may be a combination of mechanical effects (such as a rotary apparatus) and electronic circuitry.Static inverters do not use moving parts in the conversion process.