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NCP1207A, NCP1207B PWM Current--Mode Controller for Free Running Quasi--Resonant Operation
NCP1207A, NCP1207B PWM Current--Mode Controller for Free Running Quasi--Resonant Operation

... The NCP1207A/B combines a true current mode modulator and a demagnetization detector to ensure full borderline/critical Conduction Mode in any load/line conditions and minimum drain voltage switching (Quasi--Resonant operation). Due to its inherent skip cycle capability, the controller enters burst ...
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... Low voltage (independent of Vdd of different technologies) Differential Current mode Constant current in driver power supply (low noise) ...
Measurement Techniques
Measurement Techniques

... Vishay Semiconductor detectors have been developed to match perfectly to emitters. They have low capacitance, high photosensitivity, and extremely low saturation voltage. Silicon nitride passivation protects surface against possible impurities. ...
Mechatronic Analog Timer H3AM
Mechatronic Analog Timer H3AM

2SD1980
2SD1980

... Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fi ...
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Curva de Potência de Turbinas Eólicas
Curva de Potência de Turbinas Eólicas

... overheating due to core loss and copper loss. The harmonic content reduces machine efficiency. As a reference, IEEE Std. 519-1992 says that overheating due to harmonics typically decrease efficiency from 5 % to 10 % when compared to a resistive load. It would be interesting that the converter respon ...
AFR 10_Manual_English-5
AFR 10_Manual_English-5

... When operated in contradiction with the technical specifications, proper functionality is not guaranteed. Before any manipulation with the instrument, disconnect voltage transformers out of the network. Don't touch instrument terminals and don't use the instrument without its cover. ...
Film Capacitors, Power Factor Correction, Power Quality Solutions
Film Capacitors, Power Factor Correction, Power Quality Solutions

... Figure 2 shows the total current harmonic distortion without PQSine P-series. Figure 3 shows the result with activated PQSine P-series, namely a cleaner grid. In addition to eliminating the harmonics, the PQSine P-series active filter and power optimizer also actively balances the loads to all three ...
Chapter 4 – Typical application circuits
Chapter 4 – Typical application circuits

sensorless drive for high-speed brushless dc motor
sensorless drive for high-speed brushless dc motor

... revolutions per minute(r/min) due to the development of bearing technology, a proper drive method to ensure low loss and high efficiency in a wide speed range becomes a critical issue. Meanwhile, it is well known that the BLDC motor requires six discrete rotor positions for the inverter operation. T ...
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BITXxxA Assembly and Modification Tips

Télécharger
Télécharger

... come to expect an impedance-based fault locator as a standard feature in a line protective relay. From now on, expect line protective relays to offer traveling-wave fault locating with ten-fold better accuracy. The SEL-T400L incorporates a single-ended traveling-wave fault-locating method, which cal ...
ST3241EB
ST3241EB

... TA = 25 °C, RL = 3 k to 7 kΩ, VCC = 3.3 V measured from +3 V to –3 V or –3 V to +3 V CL = 150 pF to 1000 pF CL = 150 pF to 2500 pF ...
Enhanced Virtual Synchronous Generator Control for Parallel
Enhanced Virtual Synchronous Generator Control for Parallel

... by the well-known feature of the swing equation, thus it is an inherent feature for a real SG as well as a VSG. It is not a critical problem for SGs because they usually have considerable overload capabilities, but the overload capabilities of inverter-interfaced DGs are not high enough to ride thou ...
5. Output Voltage Trimming
5. Output Voltage Trimming

... voltage does not alter its setting. As the output voltage is trimmed down, the current limit setpoint remains constant. Therefore, in terms of output power, if the unit is trimmed down, available output power drops accordingly. ...
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... The MAX845 topology is inherently low noise, in that either one or the other of the two power devices is on at any given time. By alternating between two identical states with one side on and the other off, the input current is nearly constant and secondary output power is available at all times. Th ...
ABB helps distribution transformers survive rapid voltage transients
ABB helps distribution transformers survive rapid voltage transients

... is not a pleasant experience under any circumstances. For electrical equipment it is not just the voltage peak that can cause damage, but also the sudden and rapid voltage rise. In some cases the voltage transients are far steeper than those that occur in typical situations covered by common standar ...
ACD-10 Pro and ACD-10 TRMS Pro Product Manual
ACD-10 Pro and ACD-10 TRMS Pro Product Manual

... Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press SELECT button momentarily to select Continuity function which is convenient for checking wiring connections and operation of switches. A continuous beep tone indicates a complete wire. Diode test function Inputs a ...
Aalborg Universitet
Aalborg Universitet

Chapter 1 Introduction to Computer Repair
Chapter 1 Introduction to Computer Repair

... cooling. The power supply must be the correct form factor and able to supply the current amount of wattage for a particular voltage level such as +5V or +12V. Multiple "rails" are commonly available for +12V since the CPU commonly needs its own connection. The number and type of connectors vary, but ...
Harmonics Filter Design
Harmonics Filter Design

Feedback
Feedback

INSTRUCTION MANUAL OPTICAL INTERFACE UNIT (CROSS
INSTRUCTION MANUAL OPTICAL INTERFACE UNIT (CROSS

Circuit Note - Analog Devices
Circuit Note - Analog Devices

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Islanding

Islanding refers to the condition in which a distributed generator (DG) continues to power a location even though electrical grid power from the electric utility is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, and it may prevent automatic re-connection of devices. For that reason, distributed generators must detect islanding and immediately stop producing power; this is referred to as anti-islanding.The common example of islanding is a grid supply line that has solar panels attached to it. In the case of a blackout, the solar panels will continue to deliver power as long as irradiance is sufficient. In this case, the supply line becomes an ""island"" with power surrounded by a ""sea"" of unpowered lines. For this reason, solar inverters that are designed to supply power to the grid are generally required to have some sort of automatic anti-islanding circuitry in them.In intentional islanding, the generator disconnects from the grid, and forces the distributed generator to power the local circuit. This is often used as a power backup system for buildings that normally sell their excess power to the grid.
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