Journal of Electronicsl and Communication Engineering (IOSR-JECE)
... The inverters which produce an output voltage or a current with levels either 0 or +V or -V are known as two level inverters. In high-power and high-voltage applications these two-level inverters however have some limitations in operating at high frequency mainly due to switching losses and constrai ...
... The inverters which produce an output voltage or a current with levels either 0 or +V or -V are known as two level inverters. In high-power and high-voltage applications these two-level inverters however have some limitations in operating at high frequency mainly due to switching losses and constrai ...
TRANSFORMERLESS STEP UP ALTERNATING VOLTAGE
... 1. The transformerless alternating voltage regulators with a practically sinusoidal input and output currents are offered with the capability to increase per unit the voltage conversion coefficient. In the case when the load or independent three-phase source are executed with divided phases then a r ...
... 1. The transformerless alternating voltage regulators with a practically sinusoidal input and output currents are offered with the capability to increase per unit the voltage conversion coefficient. In the case when the load or independent three-phase source are executed with divided phases then a r ...
Adaptive control of power electronic drives for servomechanical
... power transfer coupling that draws power from the ac utility through a high power factor pre-regulator. Power is transferred to the load through a half-bridge inverter that energizes a separable transformer or inductive coupling. Another drive explored in [3] employs a high power factor pre-regulato ...
... power transfer coupling that draws power from the ac utility through a high power factor pre-regulator. Power is transferred to the load through a half-bridge inverter that energizes a separable transformer or inductive coupling. Another drive explored in [3] employs a high power factor pre-regulato ...
Direct ZVS start-up of a current
... but there are voltage and current overshoots. For normal dc power supplies, at start-up the output voltage is not a pure step input but ramps up slowly due to switch-on delays. In Fig. 3(b), the parameters in Table I are used but is replaced with a ramp-up time of 2 ms. It can be seen that if the co ...
... but there are voltage and current overshoots. For normal dc power supplies, at start-up the output voltage is not a pure step input but ramps up slowly due to switch-on delays. In Fig. 3(b), the parameters in Table I are used but is replaced with a ramp-up time of 2 ms. It can be seen that if the co ...
Trubitsyn, A., B. Pierquet, A. Hayman, and D.J. Perreault, “High-Efficiency, Grid-Tie Inverter for Photovoltaic Applications,” 2010 IEEE Energy Conversion Congress and Exposition , pp. 2803-2810, Sept. 2010.
... cycloconverter operates under zero-voltage switching to downconvert the high-frequency AC current, yielding unity-powerfactor output current at line frequency. This cycloconverter, which is new to the authors’ knowledge, provides smaller total device drop than conventional bidirectional-blocking-swi ...
... cycloconverter operates under zero-voltage switching to downconvert the high-frequency AC current, yielding unity-powerfactor output current at line frequency. This cycloconverter, which is new to the authors’ knowledge, provides smaller total device drop than conventional bidirectional-blocking-swi ...
Slide mode control method
... perturbation to the reference current (Iref). •This leads to the appearance of a ripple power (P), whose phase and amplitude are dependent on the relative location of the operating point relative to the MPP. •The sinusoidal current perturbation will be added to the reference current, and applied to ...
... perturbation to the reference current (Iref). •This leads to the appearance of a ripple power (P), whose phase and amplitude are dependent on the relative location of the operating point relative to the MPP. •The sinusoidal current perturbation will be added to the reference current, and applied to ...
the Canon DSLR Power Supply Datasheet
... Canon Digital SLR 8V Power Supply during image playback and therefore heat dissipation would be: (12V – 8V) * 0.430A = 1.72W Considering that U1 is attached to a heatsink (and in particular to the metal chassis of my enclosure in my particular design), a dissipation of 1.72W is not going to be an i ...
... Canon Digital SLR 8V Power Supply during image playback and therefore heat dissipation would be: (12V – 8V) * 0.430A = 1.72W Considering that U1 is attached to a heatsink (and in particular to the metal chassis of my enclosure in my particular design), a dissipation of 1.72W is not going to be an i ...
GNS ESI RF2173
... The part will operate over a 3.0V to 5.0V range. Under nominal conditions, the power at 3.5V will be greater than +34.5dBm at +90°C. As the voltage is increased, however, the output power will increase. Thus, in a system design, the ALC (Automatic Level Control) Loop will back down the power to the ...
... The part will operate over a 3.0V to 5.0V range. Under nominal conditions, the power at 3.5V will be greater than +34.5dBm at +90°C. As the voltage is increased, however, the output power will increase. Thus, in a system design, the ALC (Automatic Level Control) Loop will back down the power to the ...
MOSFET Failure Modes in the Zero-Voltage-Switched Full
... B. Low and No Load Failure Mode There is another failure mode of the ZVS fullbridge topology which occurs at no or low load condition. The necessary condition for the ZVS ...
... B. Low and No Load Failure Mode There is another failure mode of the ZVS fullbridge topology which occurs at no or low load condition. The necessary condition for the ZVS ...
Powering Trends and Issues for IP Telephony over CATV
... the duration of standby operation, both for network devices such as the optical node, amplifiers, line extenders, and other active devices, and also for the NIUs; (2) a method of powering is needed for the NIUs located at the residence of each telephony customer. Presently with circuit-switched tele ...
... the duration of standby operation, both for network devices such as the optical node, amplifiers, line extenders, and other active devices, and also for the NIUs; (2) a method of powering is needed for the NIUs located at the residence of each telephony customer. Presently with circuit-switched tele ...
this PDF file - Transaction Series on Engineering
... separate set of outputs, the complexity of control theory, analog or digital control circuit implementation complexity. It can be seen that each of them contains an impressive number of harmonic sources. Integrated steel and iron melting industry utilize large electric Arc furnaces. SVC can be used ...
... separate set of outputs, the complexity of control theory, analog or digital control circuit implementation complexity. It can be seen that each of them contains an impressive number of harmonic sources. Integrated steel and iron melting industry utilize large electric Arc furnaces. SVC can be used ...
Series 70 ePODs: Type-P - LayerZero Power Systems, Inc
... For maximum uptime, Type-P systems do not contain any fans, dust filters to change, or fan fuses to replace. The Series 70 ePODs: Type-P utilizes a natural convection-cooled heat dissipation system. ...
... For maximum uptime, Type-P systems do not contain any fans, dust filters to change, or fan fuses to replace. The Series 70 ePODs: Type-P utilizes a natural convection-cooled heat dissipation system. ...
Academic paper: Implementation of Shunt and Series FACTS
... the power flow in electrical power systems. Shunt and Series FACTS devices are used for controlling the transmission voltage, power flow and reducing reactive losses and damping of power system oscillations for high power transfer levels. FACTS devices are very efficient and increasing the power tra ...
... the power flow in electrical power systems. Shunt and Series FACTS devices are used for controlling the transmission voltage, power flow and reducing reactive losses and damping of power system oscillations for high power transfer levels. FACTS devices are very efficient and increasing the power tra ...
Dynamic Current Profiling
... If you are designing with embedded systems, you face various power optimization and power characterization hurdles throughout your design process. You know what you want to output, simulate, and measure, — but you need a whole “toolbox” of instruments and hardware to do the job. Not only is this too ...
... If you are designing with embedded systems, you face various power optimization and power characterization hurdles throughout your design process. You know what you want to output, simulate, and measure, — but you need a whole “toolbox” of instruments and hardware to do the job. Not only is this too ...
Measuring Power Consumption for DragonBoard™ 410c
... Qualcomm Snapdragon is a product of Qualcomm Technologies, Inc. Other Qualcomm products referenced herein are products of Qualcomm Technologies, Inc. or its other subsidiaries. DragonBoard, Qualcomm and Snapdragon are trademarks of Qualcomm Incorporated, registered in the United States and other cou ...
... Qualcomm Snapdragon is a product of Qualcomm Technologies, Inc. Other Qualcomm products referenced herein are products of Qualcomm Technologies, Inc. or its other subsidiaries. DragonBoard, Qualcomm and Snapdragon are trademarks of Qualcomm Incorporated, registered in the United States and other cou ...
Comparative analysis of 36, 48, 60 pulse AC-DC
... such as adjustable speed drive, HVDC system, uninterruptible power supplies etc are employed with three phase ac-dc conversion. AC-DC converters also known as rectifiers, are developed by using thyristors and diodes which provides controlled and uncontrolled dc power[5,3]. The present work analyzes ...
... such as adjustable speed drive, HVDC system, uninterruptible power supplies etc are employed with three phase ac-dc conversion. AC-DC converters also known as rectifiers, are developed by using thyristors and diodes which provides controlled and uncontrolled dc power[5,3]. The present work analyzes ...
Welding machines: V and HB series IGBTs on two
... machines can now operate at high frequencies with low losses by providing rapid rise and fall times during the turn-on and turn-off switching transients. Due to the high switching frequencies involved, welding equipment can be rendered lighter, more portable and less expensive by mounting smaller hi ...
... machines can now operate at high frequencies with low losses by providing rapid rise and fall times during the turn-on and turn-off switching transients. Due to the high switching frequencies involved, welding equipment can be rendered lighter, more portable and less expensive by mounting smaller hi ...
For more information call: APC Corporate APC North America APC
... or pay-per-view event. Home security and automation systems will remain operational no matter what happens to the power. The S15 model allows you to add additional battery packs (SBATT) to get the runtime you desire. Even at full load capacity, it is possible to have well over an hour of runtime ava ...
... or pay-per-view event. Home security and automation systems will remain operational no matter what happens to the power. The S15 model allows you to add additional battery packs (SBATT) to get the runtime you desire. Even at full load capacity, it is possible to have well over an hour of runtime ava ...
Power factor
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.