PB Series Reference Manual - HARMAN Professional Solutions
... ❏ Crown’s patented grounded bridge circuitry generates large voltage swings while avoiding electrical stress on the output stages. This results in low distortion and high reliability. ❏ Front panel power switch with turn-on delay for loudspeaker protection. ...
... ❏ Crown’s patented grounded bridge circuitry generates large voltage swings while avoiding electrical stress on the output stages. This results in low distortion and high reliability. ❏ Front panel power switch with turn-on delay for loudspeaker protection. ...
International Electrical Engineering Journal (IEEJ) Vol. 5 (2014) No.12, pp. 1703-1710
... In this figure, the feeder impedances are denoted by the Pairs (Rs1, Ls1) and (Rs2 , Ls2). It can be seen that the two feeders supply the loads L-1 and L-2. The load L-1 is assumed to have two separate components—an unbalanced part (L-11) and a non-linear part (L-12). The currents drawn by these two ...
... In this figure, the feeder impedances are denoted by the Pairs (Rs1, Ls1) and (Rs2 , Ls2). It can be seen that the two feeders supply the loads L-1 and L-2. The load L-1 is assumed to have two separate components—an unbalanced part (L-11) and a non-linear part (L-12). The currents drawn by these two ...
III. High Power Density
... transition switch) which offers soft switching at turn-on as well as at turn-off in order to reduce the switching losses [23], [24]. The considered power range is 8 to 25 kW with the switching frequency up to 100 kHz with IGBTs and 200 kHz with MOSFETs respectively. The main goal of the presented de ...
... transition switch) which offers soft switching at turn-on as well as at turn-off in order to reduce the switching losses [23], [24]. The considered power range is 8 to 25 kW with the switching frequency up to 100 kHz with IGBTs and 200 kHz with MOSFETs respectively. The main goal of the presented de ...
Aalborg Universitet A Novel Harmonic Elimination Approach in Three-Phase Multi-Motor Drives
... current levels, thus leading to a better overall grid power quality. This technique is based on a pre-programmed switching pattern for the DC-link current to obtain input currents with zero content at those specific harmonics [7]. The basic idea of the proposed current modulation method for only one ...
... current levels, thus leading to a better overall grid power quality. This technique is based on a pre-programmed switching pattern for the DC-link current to obtain input currents with zero content at those specific harmonics [7]. The basic idea of the proposed current modulation method for only one ...
Aggregation of Reactive Power
... Linear addition is the straight forward addition of the readings of the Mvarh leading and Mvarh lagging Meters at each metered point to give total Mvarh leading and Mvarh lagging reactive energy readings respectively. Linear addition is only applicable when all the meter values for a Settlement Peri ...
... Linear addition is the straight forward addition of the readings of the Mvarh leading and Mvarh lagging Meters at each metered point to give total Mvarh leading and Mvarh lagging reactive energy readings respectively. Linear addition is only applicable when all the meter values for a Settlement Peri ...
Aalborg Universitet Hu, Jiefeng; Zhu, Jianguo; Dorrell, David; Guerrero, Josep M.
... profile. In addition, as the penetration and capacities of DG units increase, the power converters are required to operate more efficiently and effectively to maintain high power quality and dynamic stability. To fulfill these requirements, advanced control techniques are essential. Several inverter ...
... profile. In addition, as the penetration and capacities of DG units increase, the power converters are required to operate more efficiently and effectively to maintain high power quality and dynamic stability. To fulfill these requirements, advanced control techniques are essential. Several inverter ...
(AFE) Drives - Mirus International
... treatment of harmonics associated with variable frequency drives (VFDs). They are quick to point out benefits over standard 6-Pulse VFDs equipped with diode bridge rectifiers such as, reduced line current harmonics, improved power factor and inherent regenerative capabilities. But they will hide the ...
... treatment of harmonics associated with variable frequency drives (VFDs). They are quick to point out benefits over standard 6-Pulse VFDs equipped with diode bridge rectifiers such as, reduced line current harmonics, improved power factor and inherent regenerative capabilities. But they will hide the ...
Power Sequence and Reset Utilizing the Intel EP80579 Integrated
... control signals. With fewer power rails, the power sequence was also less complicated. Currently, due to an increased need to support a variety of logic voltage levels—some being legacy, some being new lower levels for supporting higher speeds such as DDR, and some being high speed differentials—the ...
... control signals. With fewer power rails, the power sequence was also less complicated. Currently, due to an increased need to support a variety of logic voltage levels—some being legacy, some being new lower levels for supporting higher speeds such as DDR, and some being high speed differentials—the ...
Systems-Level Trade Studies of a Dual
... stationkeeping. The GEO mass benefits could be increased even further with a dual-mode SPT-140 subsystem, i.e. one that is designed for optimal performance in two different modes. This paper will present the results of systems-level trade studies of a dual-mode subsystem, based on the SPT-140 subsys ...
... stationkeeping. The GEO mass benefits could be increased even further with a dual-mode SPT-140 subsystem, i.e. one that is designed for optimal performance in two different modes. This paper will present the results of systems-level trade studies of a dual-mode subsystem, based on the SPT-140 subsys ...
Discrete Power Supply Solution for Atmel
... Clock Circuits Power Supply Atmel eMPUs have separate power supply inputs for their oscillators and PLL circuits. These analog circuits can be decoupled from the digital (core and I/Os) activity of the device and thus generate less jittered clocks. Atmel highly recommends feeding these power supply ...
... Clock Circuits Power Supply Atmel eMPUs have separate power supply inputs for their oscillators and PLL circuits. These analog circuits can be decoupled from the digital (core and I/Os) activity of the device and thus generate less jittered clocks. Atmel highly recommends feeding these power supply ...
60-W, 24-V, High-Efficiency Industrial Power
... supply needs of a reduced number of feedback loops for precision current and power limits, eliminating the need of current sensing on secondary side and multiple optocoupler feedback loops for open-loop detection and power limiting. The UCC28740 isolated-flyback power supply controller provides CV o ...
... supply needs of a reduced number of feedback loops for precision current and power limits, eliminating the need of current sensing on secondary side and multiple optocoupler feedback loops for open-loop detection and power limiting. The UCC28740 isolated-flyback power supply controller provides CV o ...
high voltage direct current power transmission
... population and industrial centers are in its central part and on its East Coast. Similarly, the best solar energy resources exist in a East-West corridor including the desert south-west. We suggest that there is a need to supplement the existing electrical grid system with High Voltage Direct Curren ...
... population and industrial centers are in its central part and on its East Coast. Similarly, the best solar energy resources exist in a East-West corridor including the desert south-west. We suggest that there is a need to supplement the existing electrical grid system with High Voltage Direct Curren ...
PDF - This Chapter
... The default power supply configuration is to have one power supply installed in slot 1 and the software configured for no power-supply dual. This suppresses any alarms triggered by not having two power supplies installed. When the switch is operating with two power supplies, we recommend you enter t ...
... The default power supply configuration is to have one power supply installed in slot 1 and the software configured for no power-supply dual. This suppresses any alarms triggered by not having two power supplies installed. When the switch is operating with two power supplies, we recommend you enter t ...
Advantages of IC-Based Hot-Swap Circuit
... Hot-swap circuits protect equipment, personnel, or both. Some power supplies, for example, have built-in and adjustable current limiting (standard in hot-swap circuits) that prevents damage to the power supply and the circuit being powered during a hot-swap event. Typical RAID and telecom systems ha ...
... Hot-swap circuits protect equipment, personnel, or both. Some power supplies, for example, have built-in and adjustable current limiting (standard in hot-swap circuits) that prevents damage to the power supply and the circuit being powered during a hot-swap event. Typical RAID and telecom systems ha ...
PDF - This Chapter
... The default power supply configuration is to have one power supply installed in slot 1 and the software configured for no power-supply dual. This suppresses any alarms triggered by not having two power supplies installed. When the switch is operating with two power supplies, we recommend you enter t ...
... The default power supply configuration is to have one power supply installed in slot 1 and the software configured for no power-supply dual. This suppresses any alarms triggered by not having two power supplies installed. When the switch is operating with two power supplies, we recommend you enter t ...
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.