Frequency Dither Circuit for Electronic Ballast EMI Reduction Abstract
... Electronic ballasts include switched-mode circuits that can generate a high amount of electro-magnetic interference (EMI). This EMI can conduct through various paths within the electronic ballast circuit and eventually reach the AC mains voltage as conducted noise. To block this noise, an L-C filter ...
... Electronic ballasts include switched-mode circuits that can generate a high amount of electro-magnetic interference (EMI). This EMI can conduct through various paths within the electronic ballast circuit and eventually reach the AC mains voltage as conducted noise. To block this noise, an L-C filter ...
Lecture 24 - UConn Physics
... • How do we transport power from power stations to homes? – At home, the AC voltage obtained from outlets in this country is 120V at 60Hz. – Transmission of power is typically at very high voltages ( eg ~500 kV) (a “high tension” line) – Transformers are used to raise the voltage for transmission an ...
... • How do we transport power from power stations to homes? – At home, the AC voltage obtained from outlets in this country is 120V at 60Hz. – Transmission of power is typically at very high voltages ( eg ~500 kV) (a “high tension” line) – Transformers are used to raise the voltage for transmission an ...
Tens kilowatts power supply based on half
... based on the full-bridge serial resonant inverters. The manufacturers of such the power supplies estimate they efficiency at the level 85- ...
... based on the full-bridge serial resonant inverters. The manufacturers of such the power supplies estimate they efficiency at the level 85- ...
Effects of High Switching Frequency on Buck Regulators
... values could be smaller, reducing total converter size and cost. For competing designs differing only in switching frequency: Inductor value is inversely proportional to switching frequency for equal peak-to-peak ripple current. But di/dt is then proportional to frequency, with impacts discussed lat ...
... values could be smaller, reducing total converter size and cost. For competing designs differing only in switching frequency: Inductor value is inversely proportional to switching frequency for equal peak-to-peak ripple current. But di/dt is then proportional to frequency, with impacts discussed lat ...
Phase Locked Loop Basics
... This comes at the expense of slower response and reduced capture range. An example of typical measurement of PLL dynamic response is shown in figure 2. This PLL is used in a frequency synthesizer and shows the response to an 80 kHz step in the 10 MHz reference input. This circuit has a capture range ...
... This comes at the expense of slower response and reduced capture range. An example of typical measurement of PLL dynamic response is shown in figure 2. This PLL is used in a frequency synthesizer and shows the response to an 80 kHz step in the 10 MHz reference input. This circuit has a capture range ...
A Free-space Optically-Locked VCO with Picosecond Timing Jitter in 0.18µm CMOS
... in the left figure. A directly-modulated Vertical Cavity Surface Emitting Laser (VCSEL) operating at 850nm with 11GHz bandwidth is used as the optical source. The amplitude of the optical signal is modulated by an Anritsu 68369B RF signal generator. The modulation frequency is close to the free-runn ...
... in the left figure. A directly-modulated Vertical Cavity Surface Emitting Laser (VCSEL) operating at 850nm with 11GHz bandwidth is used as the optical source. The amplitude of the optical signal is modulated by an Anritsu 68369B RF signal generator. The modulation frequency is close to the free-runn ...
Engineering Challenges in Wind Turbine Design
... Alternative #2: detailed time-domain simulations • Performed in an EMT-type program (EMTP, ATP, PSCAD, etc.) • Requires detailed hardware and control model – Such data are usually considered quite proprietary – “Generic” models are quite meaningless • Not well suited for large system studies • Requi ...
... Alternative #2: detailed time-domain simulations • Performed in an EMT-type program (EMTP, ATP, PSCAD, etc.) • Requires detailed hardware and control model – Such data are usually considered quite proprietary – “Generic” models are quite meaningless • Not well suited for large system studies • Requi ...
Calculation of Power factor Correction
... lagging kVAR drawn by the motor are considerably reduced. Secondly, phase advancer can be conveniently used where the use of synchronous motors is inadmissible. However, the major disadvantage of phase advancers is that they are not economical for motors below 200 H.P. ...
... lagging kVAR drawn by the motor are considerably reduced. Secondly, phase advancer can be conveniently used where the use of synchronous motors is inadmissible. However, the major disadvantage of phase advancers is that they are not economical for motors below 200 H.P. ...
Thermal Agitation of Electric Charge in Conductors
... that such quantities as charge, number, and mass of the carriers of electricity do not appear explicitly in the formula for electromotive force These quantities inHuence R„however, and, therefore, enter indirectly. It is instructive to consider the equilibrium between the thermal agitation of the ca ...
... that such quantities as charge, number, and mass of the carriers of electricity do not appear explicitly in the formula for electromotive force These quantities inHuence R„however, and, therefore, enter indirectly. It is instructive to consider the equilibrium between the thermal agitation of the ca ...
ELECTROTHERAPY
... the interpulse interval and a frequency equal to that of the original AC Full-wave rectification (double phase or diphasé fixe (DF)) Produces a monophasic pulsed current with no interpulse internal at twice the original AC frequency ...
... the interpulse interval and a frequency equal to that of the original AC Full-wave rectification (double phase or diphasé fixe (DF)) Produces a monophasic pulsed current with no interpulse internal at twice the original AC frequency ...
Utility frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.