power quality improvement using facts device (statcom)
... eliminate the harmonic content of the load current the STATCOM-BESS control system is used. So that power quality is maintained at the point of common coupling. And hysteresis current control scheme in the STATCOM is used for the fast dynamic response. It also maintains voltage and current in phase. ...
... eliminate the harmonic content of the load current the STATCOM-BESS control system is used. So that power quality is maintained at the point of common coupling. And hysteresis current control scheme in the STATCOM is used for the fast dynamic response. It also maintains voltage and current in phase. ...
HIGH INPUT VOLTAGE BUCK-BOOST CONVERTER WITH 2
... 2A while using a dual-cell Li-Ion or Li-Polymer Battery, and discharge it down to 5V or lower. The buck-boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters Powe ...
... 2A while using a dual-cell Li-Ion or Li-Polymer Battery, and discharge it down to 5V or lower. The buck-boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters Powe ...
DATA SHEET BFQ18A NPN 4 GHz wideband transistor September 1995
... more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods ...
... more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods ...
Galvanometers
... otherwise burn out the galvanometer. The shunt also allows the ammeter to have a low resistance so that it will have a small effect on the circuit whose current is to be measured. (To use an ammeter the circuit must be broken and the ammeter inserted between the break.) A typical analog voltmeter co ...
... otherwise burn out the galvanometer. The shunt also allows the ammeter to have a low resistance so that it will have a small effect on the circuit whose current is to be measured. (To use an ammeter the circuit must be broken and the ammeter inserted between the break.) A typical analog voltmeter co ...
90W Resonant SMPS with TEA1610 SwingChip APPLICATION NOTE AN99011
... charging of the bootstrap capacitor which is used for the floating supply of the high side driver. During start-up, the voltage across the frequency capacitor C17 is zero to have a defined start-up. The output voltage of the error amplifier is kept on a constant voltage of 2.7V, which forces a curre ...
... charging of the bootstrap capacitor which is used for the floating supply of the high side driver. During start-up, the voltage across the frequency capacitor C17 is zero to have a defined start-up. The output voltage of the error amplifier is kept on a constant voltage of 2.7V, which forces a curre ...
Electrical characteristics - Teaching Advanced Physics
... Students determine the V-I characteristics for a carbon resistor, semiconductor diode and filament lamp. This activity is best carried out individually (if space and apparatus allows this) so that each student has to construct and test his/her own circuit. One of the dangers of always working in pai ...
... Students determine the V-I characteristics for a carbon resistor, semiconductor diode and filament lamp. This activity is best carried out individually (if space and apparatus allows this) so that each student has to construct and test his/her own circuit. One of the dangers of always working in pai ...
Transistors IV 6-7-11
... When the forward Base Current increases to a point where further increase if base current causes no additional increase in collector current then the transistor is in Saturation. ...
... When the forward Base Current increases to a point where further increase if base current causes no additional increase in collector current then the transistor is in Saturation. ...
KB2517721780
... problems in the balancing of their dc-link capacitor voltages [10], [11], unless modified modulation strategies [12] or additionally circuitry [13] are used. On the other hand, the CHB converter is normally implemented with large number of levels, but at the cost of complicated and bulky input trans ...
... problems in the balancing of their dc-link capacitor voltages [10], [11], unless modified modulation strategies [12] or additionally circuitry [13] are used. On the other hand, the CHB converter is normally implemented with large number of levels, but at the cost of complicated and bulky input trans ...
500W Subwoofer Power Amplifier (Updated)
... MJE350 as originally specified (note that the pinouts are reversed between the TO-126 and TO-220 devices). Note that some component values have been changed! The layout is the same, but the changes shown will reduce dissipation in Q7 and Q8 under light load conditions. Having built a couple of P68 a ...
... MJE350 as originally specified (note that the pinouts are reversed between the TO-126 and TO-220 devices). Note that some component values have been changed! The layout is the same, but the changes shown will reduce dissipation in Q7 and Q8 under light load conditions. Having built a couple of P68 a ...
Table of contents
... probably wire-wound. If it slides smoothly, then we have an element potentiometer. If part of the travel is smooth and part rough, it is a bad resistor. 3. For a non-linear pot, we can realize a slow change in resistance while approaching one end of the element, and rapid change while approaching to ...
... probably wire-wound. If it slides smoothly, then we have an element potentiometer. If part of the travel is smooth and part rough, it is a bad resistor. 3. For a non-linear pot, we can realize a slow change in resistance while approaching one end of the element, and rapid change while approaching to ...
FEATURES DESCRIPTION D
... Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments.All other trademarks are the p ...
... Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments.All other trademarks are the p ...
A B E D Intermediate conclusion after the 4th week. Correct
... Hints after the 2nd week: As a first step, find the resistance between B and E when the segments DA and AB (together with the respective capacitors) are still present. This can be found in the same way as the resistance r between two neighbouring nodes P and Q of an infinite square lattice of resist ...
... Hints after the 2nd week: As a first step, find the resistance between B and E when the segments DA and AB (together with the respective capacitors) are still present. This can be found in the same way as the resistance r between two neighbouring nodes P and Q of an infinite square lattice of resist ...
Exclusive Technology Feature Synchronous Zeta Converter
... many of the power stage components will need to handle I IN + IOUT. Assuming 90% efficiency at low line, the input current will be 8.9 A and IIN + IOUT will be 13.9 A. Since an input of 6 V occurs as a transient, sustained operation is not required at this point, but the circuit components must be r ...
... many of the power stage components will need to handle I IN + IOUT. Assuming 90% efficiency at low line, the input current will be 8.9 A and IIN + IOUT will be 13.9 A. Since an input of 6 V occurs as a transient, sustained operation is not required at this point, but the circuit components must be r ...
香港考試局
... 15.1 E.m.f. and internal resistance of battery 1. The e.m.f. of a battery is equal to (1) the total electrical energy it releases, per coulomb of charge when connected to an external circuit. (2) the total electrical energy it generates divided by the current it delivers. (3) the potential differenc ...
... 15.1 E.m.f. and internal resistance of battery 1. The e.m.f. of a battery is equal to (1) the total electrical energy it releases, per coulomb of charge when connected to an external circuit. (2) the total electrical energy it generates divided by the current it delivers. (3) the potential differenc ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.