Control of a 3-phase 4-leg active power filter under non
... load current balancing and neutral current elimination performance of the 4-leg APF with the proposed method, the p–q and p–q–r theory have been examined under four mains voltage cases, including ideal mains voltage, unbalanced mains voltage, balanced-distorted mains voltage and unbalanced-distorted ...
... load current balancing and neutral current elimination performance of the 4-leg APF with the proposed method, the p–q and p–q–r theory have been examined under four mains voltage cases, including ideal mains voltage, unbalanced mains voltage, balanced-distorted mains voltage and unbalanced-distorted ...
Aalborg Universitet inverters-based microgrid
... Abstract –This paper presents a hybrid islanding detection algorithm integrated on the distributed generation unit more close to the point of common coupling of a Microgrid based on parallel inverters where one of them is responsible to control the system. The method is based on resonance excitation ...
... Abstract –This paper presents a hybrid islanding detection algorithm integrated on the distributed generation unit more close to the point of common coupling of a Microgrid based on parallel inverters where one of them is responsible to control the system. The method is based on resonance excitation ...
Common Mode Rejection Ratio
... shows that in order to reduce Acm, we want to make the effective impedance of the current source very high – Using a resistor to generate the current source limits our design options in making rn (RE in this case) high An alternate method of generating Io is to use an NPN transistor current source s ...
... shows that in order to reduce Acm, we want to make the effective impedance of the current source very high – Using a resistor to generate the current source limits our design options in making rn (RE in this case) high An alternate method of generating Io is to use an NPN transistor current source s ...
12 A, 200 V, Ultrafast Dual Diode Features
... Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard perform ...
... Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard perform ...
Power Converter - CERN Accelerator School
... "Do you have one or two power converters for the test of magnet prototypes? 40 A will be enough ? Precision is not important for time being. Don’t worry it’s not urgent. Next month is OK " (Email received 05.12.08) ...
... "Do you have one or two power converters for the test of magnet prototypes? 40 A will be enough ? Precision is not important for time being. Don’t worry it’s not urgent. Next month is OK " (Email received 05.12.08) ...
AL8806Q Description Pin Assignments
... A value of 1μF will reduce the supply ripple current by a factor three (approx.). Proportionally lower ripple can be achieved with higher capacitor values. Note that the capacitor will not affect operating frequency or efficiency, but it will increase ...
... A value of 1μF will reduce the supply ripple current by a factor three (approx.). Proportionally lower ripple can be achieved with higher capacitor values. Note that the capacitor will not affect operating frequency or efficiency, but it will increase ...
DCM&T - Universal College of Engineering & Technology
... Three-phase transformers Fig.9 Three-phase transformer for an electric arc furnace, rated 36 MVA, 13.8 kV/160 V to 320 V, 60 Hz. The secondary voltage is adjustable from 160 V to 320 V by means of 32 taps on the primary winding (not shown). The three large busbars in the foreground deliver a curren ...
... Three-phase transformers Fig.9 Three-phase transformer for an electric arc furnace, rated 36 MVA, 13.8 kV/160 V to 320 V, 60 Hz. The secondary voltage is adjustable from 160 V to 320 V by means of 32 taps on the primary winding (not shown). The three large busbars in the foreground deliver a curren ...
AN2839
... specialized IC products. The L6228 is a fully-integrated stepper motor driver IC specifically developed to drive a wide range of two-phase (bipolar) stepper motors. This IC is a onechip, cost-effective solution that includes several unique circuit design features. These features, including a decodin ...
... specialized IC products. The L6228 is a fully-integrated stepper motor driver IC specifically developed to drive a wide range of two-phase (bipolar) stepper motors. This IC is a onechip, cost-effective solution that includes several unique circuit design features. These features, including a decodin ...
High-Efficiency Ripple-Free Power Converter for Nuclear
... Since a ripple free output is desired, the class AB linear amplifier should be controlled to enforce the ripple free desired output (i0 or uo) in the load (Fig. 1). Concurrently, as high efficiency is required, the linear amplifier output current must be almost zero. Therefore, the PWM power convert ...
... Since a ripple free output is desired, the class AB linear amplifier should be controlled to enforce the ripple free desired output (i0 or uo) in the load (Fig. 1). Concurrently, as high efficiency is required, the linear amplifier output current must be almost zero. Therefore, the PWM power convert ...
dynamic model of pm synchronous motors
... inside the rotor core rather than bonded on the rotor surface, the motor not only provides mechanical ruggedness but also opens a possibility of increasing its torque capability. By designing a rotor magnetic circuit such that the inductance varies as a function of rotor angle, the reluctance torque ...
... inside the rotor core rather than bonded on the rotor surface, the motor not only provides mechanical ruggedness but also opens a possibility of increasing its torque capability. By designing a rotor magnetic circuit such that the inductance varies as a function of rotor angle, the reluctance torque ...
A Power Converter for Photovoltaic Applications
... vibrate more and therefore have a larger virtual cross-section area. The electron, then, does not contribute to the driving current, but increases the vibration energy (temperature) of the lattice. The ...
... vibrate more and therefore have a larger virtual cross-section area. The electron, then, does not contribute to the driving current, but increases the vibration energy (temperature) of the lattice. The ...
pcm-875 plasma arc cutting package
... 2. Always secure cylinders in an upright position by chain or strap to suitable hand trucks, undercarriages, benches, walls, post, or racks. Never secure cylinders to work tables or fixtures where they may become part of an electrical circuit. 3. When not in use, keep cylinder valves closed. Have va ...
... 2. Always secure cylinders in an upright position by chain or strap to suitable hand trucks, undercarriages, benches, walls, post, or racks. Never secure cylinders to work tables or fixtures where they may become part of an electrical circuit. 3. When not in use, keep cylinder valves closed. Have va ...
AP8801 500mA LED STEP-DOWN CONVERTER Description
... The AP8801 has by default open LED protection. If the LEDs should become open circuit the AP8801 will stop oscillating; the SET pin will rise to VIN and the SW pin will then fall to GND. No excessive voltages will be seen by the AP8801. If the LEDs should become shorted together the AP8802H will con ...
... The AP8801 has by default open LED protection. If the LEDs should become open circuit the AP8801 will stop oscillating; the SET pin will rise to VIN and the SW pin will then fall to GND. No excessive voltages will be seen by the AP8801. If the LEDs should become shorted together the AP8802H will con ...
AN3410
... the input voltage zero crossings. Power factor remains excellent, even with this distortion. ...
... the input voltage zero crossings. Power factor remains excellent, even with this distortion. ...
Electronic components
... 1.3.3 Advantages of ceramic over mica and paper capacitor :(1) Economical, (2) Very High working voltage rating, (3) Very small size but large capacitance, (4) It has very low power factor and value decreases with increase in frequency. 1.3.4 Electrolytic Capacitor- The entire sandwich with plates a ...
... 1.3.3 Advantages of ceramic over mica and paper capacitor :(1) Economical, (2) Very High working voltage rating, (3) Very small size but large capacitance, (4) It has very low power factor and value decreases with increase in frequency. 1.3.4 Electrolytic Capacitor- The entire sandwich with plates a ...
LT1784 - 2.5MHz, Over-The-Top Low Power, Rail-to-Rail Input and Output Op Amp in SOT-23
... unique feature of this device is its Over-The-Top® operation capabilitity with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs ...
... unique feature of this device is its Over-The-Top® operation capabilitity with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs ...
60-W, 24-V, High-Efficiency Industrial Power
... provide a convenient means for powering DC operated devices including programmable logic controllers (PLCs), sensors, transmitters or receivers, analyzers, motors, actuators, solenoids, relays, and so on. These supplies are convection cooled, so no cooling fans are needed. The AC/DC power supplies c ...
... provide a convenient means for powering DC operated devices including programmable logic controllers (PLCs), sensors, transmitters or receivers, analyzers, motors, actuators, solenoids, relays, and so on. These supplies are convection cooled, so no cooling fans are needed. The AC/DC power supplies c ...
Ampere Interrupting Capacity Calculations Or……
... resistance (R) should actually be replaced with an impedance value (Z). Impedance is calculated using the formula Z=√(R2+X2). For instance, instead of using the percentage impedance for transformers, percent Z, percent X, and percent R are used and converted to X and R values on a per unit basis. An ...
... resistance (R) should actually be replaced with an impedance value (Z). Impedance is calculated using the formula Z=√(R2+X2). For instance, instead of using the percentage impedance for transformers, percent Z, percent X, and percent R are used and converted to X and R values on a per unit basis. An ...
Mercury-arc valve
A mercury-arc valve or mercury-vapor rectifier or (UK) mercury-arc rectifier is a type of electrical rectifier used for converting high-voltage or high-current alternating current (AC) into direct current (DC). It is a type of cold cathode gas-filled tube, but is unusual in that the cathode, instead of being solid, is made from a pool of liquid mercury and is therefore self-restoring. As a result, mercury-arc valves were much more rugged, long-lasting and could carry much higher currents than most other types of gas discharge tube.Invented in 1902 by Peter Cooper Hewitt, mercury-arc rectifiers were used to provide power for industrial motors, electric railways, streetcars, and electric locomotives, as well as for radio transmitters and for high-voltage direct current (HVDC) power transmission. They were the primary method of high power rectification before the advent of semiconductor rectifiers, such as diodes, thyristors and gate turn-off thyristors (GTOs) in the 1970s.