IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... Harmonics are electric voltages and currents that appear on the electric power system as a result of non-linear electric loads. Harmonic frequencies in the power grid are a frequent cause of power quality problems. Harmonic components should be reduced as much as possible. These are causes of harmon ...
... Harmonics are electric voltages and currents that appear on the electric power system as a result of non-linear electric loads. Harmonic frequencies in the power grid are a frequent cause of power quality problems. Harmonic components should be reduced as much as possible. These are causes of harmon ...
Aalborg Universitet Applied to Parallel UPS Systems
... current difference, respectively, which are zero. 4) Nonlinear Load: The next results were realized with a load 1000 V A load, which consisted of a diode-bridge, a bulky capacitor of 1.15 mF , in parallel with a resistance of 108.75 Ω according to the IEC 62040-3 standard. In Fig. 16 and Fig. 17, in ...
... current difference, respectively, which are zero. 4) Nonlinear Load: The next results were realized with a load 1000 V A load, which consisted of a diode-bridge, a bulky capacitor of 1.15 mF , in parallel with a resistance of 108.75 Ω according to the IEC 62040-3 standard. In Fig. 16 and Fig. 17, in ...
Introduction to the Use of MicroTran R and other EMTP Versions
... with respect to magnitude and angle. You cannot specify real and reactive power, or real power and voltage magnitude, in these linear solutions. The incentive for power ow solutions with EMTP-type programs came from the fact that these programs allow users to set up cases in great detail, such ...
... with respect to magnitude and angle. You cannot specify real and reactive power, or real power and voltage magnitude, in these linear solutions. The incentive for power ow solutions with EMTP-type programs came from the fact that these programs allow users to set up cases in great detail, such ...
Electronic Soft Starters
... Primitive, but familiar - Just a simple contactor in circuit between the motor and supply giving only unsynchronised on-off control No control over inrush currents or torque surge at start up Very rapid acceleration of load with large transient forces placed on drive train and electrical system ...
... Primitive, but familiar - Just a simple contactor in circuit between the motor and supply giving only unsynchronised on-off control No control over inrush currents or torque surge at start up Very rapid acceleration of load with large transient forces placed on drive train and electrical system ...
Basic Circuit Components PowerPoint
... resistance in the other, so that they only allow current to flow in one direction. These diodes are called rectifiers. • Recall that semiconductors may change from insulators to conductors under certain conditions. For semiconductor diodes, the diode behaves as an insulator until a certain voltage i ...
... resistance in the other, so that they only allow current to flow in one direction. These diodes are called rectifiers. • Recall that semiconductors may change from insulators to conductors under certain conditions. For semiconductor diodes, the diode behaves as an insulator until a certain voltage i ...
DC988A - Linear Technology
... down for at least ½ second in order for the microcontroller to recognize a valid button event. It is assumed that DC988 will be tested with power provided from an external source, such as a lab bench supply. Under such an operating condition, the wire length between the DC988 board and the power sup ...
... down for at least ½ second in order for the microcontroller to recognize a valid button event. It is assumed that DC988 will be tested with power provided from an external source, such as a lab bench supply. Under such an operating condition, the wire length between the DC988 board and the power sup ...
Transformers Practice #1
... The loop ratio is 108 and the secondary coil voltage is 120 V. The power output of the secondary coil is 9.59 kW. a. What is the primary coil voltage? b. What is the primary coil current? c. What is the power output of the primary coil? d. What is the secondary coil current? ...
... The loop ratio is 108 and the secondary coil voltage is 120 V. The power output of the secondary coil is 9.59 kW. a. What is the primary coil voltage? b. What is the primary coil current? c. What is the power output of the primary coil? d. What is the secondary coil current? ...
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... When the STATCOM is used for reactive-power generation, the converter itself can keep the capacitor charged to the required voltage level. This task is accomplished by making the output voltages of the converter lag behind the ac-system voltages by a small angle (usually in the 0.18–0.28 range). In ...
... When the STATCOM is used for reactive-power generation, the converter itself can keep the capacitor charged to the required voltage level. This task is accomplished by making the output voltages of the converter lag behind the ac-system voltages by a small angle (usually in the 0.18–0.28 range). In ...
BSNL(JTO) Examination 2006
... (c) PEEK (d) Insufficient information to answer Q.41 A battery of 40 V and three capacitors of 1000 μF, 500 μF and 100 μF are all connected in (I) parallel and (II) series. The ratio of total charge stored in case I to that in case II is approximately (a) 3 : 64 (b) 64 : 3 (c) 160 : 3 (d) 104 : 5 ...
... (c) PEEK (d) Insufficient information to answer Q.41 A battery of 40 V and three capacitors of 1000 μF, 500 μF and 100 μF are all connected in (I) parallel and (II) series. The ratio of total charge stored in case I to that in case II is approximately (a) 3 : 64 (b) 64 : 3 (c) 160 : 3 (d) 104 : 5 ...
Design of Delta Primary - Transposed zigzag Secondary (DTz
... Abstract: The delta primary - transposed zigzag secondary (DTz) transformer has been designed and used to reduce the bad impacts of the harmonic in the distribution power system. The DTz transformer is constructed with delta connection in primary winding and the three transposed windings at the diff ...
... Abstract: The delta primary - transposed zigzag secondary (DTz) transformer has been designed and used to reduce the bad impacts of the harmonic in the distribution power system. The DTz transformer is constructed with delta connection in primary winding and the three transposed windings at the diff ...
Voltage Dividers and Current Dividers
... 7-1: Series Voltage Dividers VT is divided into IR voltage drops that are proportional to the series resistance values. Each resistance provides an IR voltage drop equal to its proportional part of the applied voltage: VR = (R/RT) × VT This formula can be used for any number of series resista ...
... 7-1: Series Voltage Dividers VT is divided into IR voltage drops that are proportional to the series resistance values. Each resistance provides an IR voltage drop equal to its proportional part of the applied voltage: VR = (R/RT) × VT This formula can be used for any number of series resista ...
How to Specify an Electric Flight System
... Electrical Power (PIN) is determined by voltage (V) x electrical current (I): PIN = V.I Motor Power (POUT) is determined by torque (t) x angular velocity (w): POUT = t.w = t x rpm ÷ 0.105 The system’s efficiency (e) is determined by: e = POUT ÷ PIN Torque is difficult to measure. For simplicity we w ...
... Electrical Power (PIN) is determined by voltage (V) x electrical current (I): PIN = V.I Motor Power (POUT) is determined by torque (t) x angular velocity (w): POUT = t.w = t x rpm ÷ 0.105 The system’s efficiency (e) is determined by: e = POUT ÷ PIN Torque is difficult to measure. For simplicity we w ...
A 40Gb/s Clock and Data Recovery Circuit in 0.18um
... equally-spaced points. Illustrated in Fig. 13.7.2a, the circuit sustains a phase separation of 180O at diagonally-opposite nodes, providing 45O phase steps in between. Unlike coupled oscillators, this circuit does not operate away from the resonance frequency. Also, in contrast to the design in [2], ...
... equally-spaced points. Illustrated in Fig. 13.7.2a, the circuit sustains a phase separation of 180O at diagonally-opposite nodes, providing 45O phase steps in between. Unlike coupled oscillators, this circuit does not operate away from the resonance frequency. Also, in contrast to the design in [2], ...
network and theorems trainers
... m-Derived high and low pass filters Trainer Constant – K high and low pass filters Trainer ...
... m-Derived high and low pass filters Trainer Constant – K high and low pass filters Trainer ...
MOTOR BOARD
... direct acquisition of speed and direction of rotation - Built-in sight window for optical recognition of speed and direction of rotation and stroboscopic scanning A DC power amplifier is built into the MOTOR BOARD for direct connection to a controller or a PLL circuit. It is possible to plug this am ...
... direct acquisition of speed and direction of rotation - Built-in sight window for optical recognition of speed and direction of rotation and stroboscopic scanning A DC power amplifier is built into the MOTOR BOARD for direct connection to a controller or a PLL circuit. It is possible to plug this am ...
Chapter07
... 7-1: Series Voltage Dividers 7-2: Current Dividers with Two Parallel Resistances 7-3: Current Division by Parallel Conductances 7-4: Series Voltage Divider with Parallel Load Current 7-5: Design of a Loaded Voltage Divider © 2007 The McGraw-Hill Companies, Inc. All rights reserved. ...
... 7-1: Series Voltage Dividers 7-2: Current Dividers with Two Parallel Resistances 7-3: Current Division by Parallel Conductances 7-4: Series Voltage Divider with Parallel Load Current 7-5: Design of a Loaded Voltage Divider © 2007 The McGraw-Hill Companies, Inc. All rights reserved. ...
PDF
... The switchpack has two main components: a transformer and one high current relay. The transformer has a primary line voltage input and a secondary low voltage output. The low voltage output, 15 VDC, provides operating power to connected low voltage Greengate occupancy sensors. When an occupancy sens ...
... The switchpack has two main components: a transformer and one high current relay. The transformer has a primary line voltage input and a secondary low voltage output. The low voltage output, 15 VDC, provides operating power to connected low voltage Greengate occupancy sensors. When an occupancy sens ...
KSD526 NPN Epitaxial Silicon Transistor Power Amplifier Applications
... product development. Specifications may change in any manner without notice. ...
... product development. Specifications may change in any manner without notice. ...
Paper - Indico
... isolation transformer is controlled by controlling primary voltage of the isolation transformer. For ramping the primary voltage of the isolation transformer, a 230 Volt SCR based control unit power supply was developed and tested. This filament supply has remote/local mode and fault signals for ind ...
... isolation transformer is controlled by controlling primary voltage of the isolation transformer. For ramping the primary voltage of the isolation transformer, a 230 Volt SCR based control unit power supply was developed and tested. This filament supply has remote/local mode and fault signals for ind ...
Valves at Low Plate Voltages (2)
... Can we do a little more? What about using a PL504 in a small class A loudspeaker amplifier? The PL504 is a physically large valve with a Magnoval base, which was used in the line output stages of television sets. Its heater requires 300 mA at 27 V. It therefore makes sense to use an anode voltage of ...
... Can we do a little more? What about using a PL504 in a small class A loudspeaker amplifier? The PL504 is a physically large valve with a Magnoval base, which was used in the line output stages of television sets. Its heater requires 300 mA at 27 V. It therefore makes sense to use an anode voltage of ...
Project Helios
... • The XBee module can be directly connected to the microcontroller. • For successful serial communication, the UART’s must be configured with the same baud rate, parity, start bits, stop bits, and data bits. On the microcontroller, pin 25 is for transmission and pin 26 is for receiving and are conne ...
... • The XBee module can be directly connected to the microcontroller. • For successful serial communication, the UART’s must be configured with the same baud rate, parity, start bits, stop bits, and data bits. On the microcontroller, pin 25 is for transmission and pin 26 is for receiving and are conne ...
Three-phase electric power
Three-phase electric power is a common method of alternating-current electric power generation, transmission, and distribution. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. It is also used to power large motors and other heavy loads. A three-phase system is usually more economical than an equivalent single-phase or two-phase system at the same line to ground voltage because it uses less conductor material to transmit electrical power.The three-phase system was independently invented by Galileo Ferraris, Mikhail Dolivo-Dobrovolsky, Jonas Wenström and Nikola Tesla in the late 1880s.