POWER CONTROL IN AC CIRCUITS USING AN AC CHOPPER
... some examples for AC-AC converters. There are many different types of AC converters but basically, they produce an output voltage at the same frequency as input AC signal with variable amplitudes. These converters are also known as AC choppers. There are many different methods AC choppers use in pro ...
... some examples for AC-AC converters. There are many different types of AC converters but basically, they produce an output voltage at the same frequency as input AC signal with variable amplitudes. These converters are also known as AC choppers. There are many different methods AC choppers use in pro ...
What is GFCI Protection?
... The NEMA number on the plug and receptacle have to be identical, otherwise, they will not connect together. As long as the number matches, different brands with the same ratings are interchangeable. Devices called “pin and sleeve” are available for currents above 50 amps three-phase. These devices a ...
... The NEMA number on the plug and receptacle have to be identical, otherwise, they will not connect together. As long as the number matches, different brands with the same ratings are interchangeable. Devices called “pin and sleeve” are available for currents above 50 amps three-phase. These devices a ...
MAX1574 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN
... 2ms (typ) to shut down the IC. From shutdown, drive EN high (50µs min) to set ILED to the maximum current (see the SETfunction). Pulse EN low for 0.5µs to 500µs to dim the LEDs (Figure 1). ...
... 2ms (typ) to shut down the IC. From shutdown, drive EN high (50µs min) to set ILED to the maximum current (see the SETfunction). Pulse EN low for 0.5µs to 500µs to dim the LEDs (Figure 1). ...
Infineon - Article - Surge current pulse generator
... after reaching the peak of the reverse recovery current can be clearly recognized. Additionally, the bigger generated voltage overshoot of the Crowbar diodes in relation to the blocking diodes can be seen. The high softness factor of the blocking diodes D2601NH90T is reached by an ion implantation. ...
... after reaching the peak of the reverse recovery current can be clearly recognized. Additionally, the bigger generated voltage overshoot of the Crowbar diodes in relation to the blocking diodes can be seen. The high softness factor of the blocking diodes D2601NH90T is reached by an ion implantation. ...
one and two quadrant choppers
... DC/DC converters allow a DC/DC static conversion of the electrical power through which only the magnitude of the DC voltage is modified. For this reason these converters can be also named DC voltage regulators or DC voltage variators. Most of the DC/DC converters operate in switch-mode using the PWM ...
... DC/DC converters allow a DC/DC static conversion of the electrical power through which only the magnitude of the DC voltage is modified. For this reason these converters can be also named DC voltage regulators or DC voltage variators. Most of the DC/DC converters operate in switch-mode using the PWM ...
NCP1612GEVB 160-W, Wide Mains, PFC Stage Driven by the NCP1612 Evaluation Board
... drive PFC boost stages in so-called Current Controlled Frequency Fold-back (CCFF). In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1612 linearly decays the fre ...
... drive PFC boost stages in so-called Current Controlled Frequency Fold-back (CCFF). In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1612 linearly decays the fre ...
Category 5 Parallel Operating
... (Project side) of the power transformer, but may instead be connected on the secondary (Utility side). VT’s are required on the secondary of the power transformer if a 59N is required for an ungrounded secondary connection. IEEE std 1547 requirements for voltage and frequency must be met at the PCC. ...
... (Project side) of the power transformer, but may instead be connected on the secondary (Utility side). VT’s are required on the secondary of the power transformer if a 59N is required for an ungrounded secondary connection. IEEE std 1547 requirements for voltage and frequency must be met at the PCC. ...
AVR352: Using the Coulomb Counting ADC
... Accumulation time used for ACC conversions can be set to 128, 256, 512 or 1024 milliseconds. The conversion time is not relevant for the resolution of the result, but is mainly for convenience so that it is possible to choose how often the current should be processed (how often the ACC interrupt sho ...
... Accumulation time used for ACC conversions can be set to 128, 256, 512 or 1024 milliseconds. The conversion time is not relevant for the resolution of the result, but is mainly for convenience so that it is possible to choose how often the current should be processed (how often the ACC interrupt sho ...
Diffusion current - Prof Dr Hisham E Abdellatef
... In this method, a Hanging Mercury Drop Electrode (HMDE) is used, the potentiostat is set a fixed value (0.2-0.4 V) more negative than the highest reduction potential encountered among the reducible ions, then electrolysis will occur, deposition of metals will take place on the HMDE cathode and amalg ...
... In this method, a Hanging Mercury Drop Electrode (HMDE) is used, the potentiostat is set a fixed value (0.2-0.4 V) more negative than the highest reduction potential encountered among the reducible ions, then electrolysis will occur, deposition of metals will take place on the HMDE cathode and amalg ...
Optimizing High Level Micro Stepping of
... As shown in Figure 4, a DAC is used to give voltage to VREFx with minimum resolution. For example, if a 10-bit DAC is used, and maximum value 1024 stands for 2.5 V, the DAC outputs 2.5 V/1024 = 2.4 mV each step. The regulated current in winding is measured by monitoring the voltage of the sense resi ...
... As shown in Figure 4, a DAC is used to give voltage to VREFx with minimum resolution. For example, if a 10-bit DAC is used, and maximum value 1024 stands for 2.5 V, the DAC outputs 2.5 V/1024 = 2.4 mV each step. The regulated current in winding is measured by monitoring the voltage of the sense resi ...
PDF
... power systems are not new, but customer awareness of these problems has recently increased. For example, for many years interruptions shorter than several minutes were not considered as a cause of concern to most consumers. Recently this has changed: more and more equipment is sensitive to very shor ...
... power systems are not new, but customer awareness of these problems has recently increased. For example, for many years interruptions shorter than several minutes were not considered as a cause of concern to most consumers. Recently this has changed: more and more equipment is sensitive to very shor ...
Category 4 Parallel Operating
... (Project side) of the power transformer, but may instead be connected on the secondary (Utility side). VT’s are required on the secondary of the power transformer if a 59N is required for an ungrounded secondary connection. IEEE std 1547 requirements for voltage and frequency must be met at the PCC. ...
... (Project side) of the power transformer, but may instead be connected on the secondary (Utility side). VT’s are required on the secondary of the power transformer if a 59N is required for an ungrounded secondary connection. IEEE std 1547 requirements for voltage and frequency must be met at the PCC. ...
Power Quality Improvement in PMBLDCM Drive
... while running at variable speed as per requirement of airconditioning system. The DC link voltage is kept constant at 400 V with an input AC rms voltage of 220V. The components of SEPIC converter are selected on the basis of PQ constraints at AC mains and allowable ripple in DC-link voltage as discu ...
... while running at variable speed as per requirement of airconditioning system. The DC link voltage is kept constant at 400 V with an input AC rms voltage of 220V. The components of SEPIC converter are selected on the basis of PQ constraints at AC mains and allowable ripple in DC-link voltage as discu ...
Wafer post processing
... •Increase sensitive area for better charge collection •Pixel enlargement done by lift-off ...
... •Increase sensitive area for better charge collection •Pixel enlargement done by lift-off ...
Aalborg Universitet Connected Microgrids under Voltage Sags
... found in Table I. Note that a 5mH inductor is used to emulate the grid impedance as explained in Section II. The correctness of the proposed control strategy has been tested in the presence of three phase voltage sag of 0.1 p.u. which occurs at t = 0.1s and clears at t = 0.6s (as shown in Fig. 8). I ...
... found in Table I. Note that a 5mH inductor is used to emulate the grid impedance as explained in Section II. The correctness of the proposed control strategy has been tested in the presence of three phase voltage sag of 0.1 p.u. which occurs at t = 0.1s and clears at t = 0.6s (as shown in Fig. 8). I ...
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.