Turn Ratio
... When considering the range of elements shown in the transformer schematic and considering also the varying requirements of different transformer applications, it can be seen that no single measurement technique will fully satisfy all turns ratio questions. For this reason, Voltech AT series transfor ...
... When considering the range of elements shown in the transformer schematic and considering also the varying requirements of different transformer applications, it can be seen that no single measurement technique will fully satisfy all turns ratio questions. For this reason, Voltech AT series transfor ...
ISL6744A - Intersil
... period, and FOSC is the oscillator frequency. One output switching cycle requires two oscillator cycles. The actual times will be slightly longer than calculated due to internal propagation delays of approximately 5ns/transition. This delay adds directly to the switching duration, and also causes ov ...
... period, and FOSC is the oscillator frequency. One output switching cycle requires two oscillator cycles. The actual times will be slightly longer than calculated due to internal propagation delays of approximately 5ns/transition. This delay adds directly to the switching duration, and also causes ov ...
Zainal Salam 2007 An Improved DCDCType High Frequency
... change of current, i.e. di/dt is very high, resulting in high voltage spikes to appear across the switches. If not properly controlled, the spikes may result in the destruction of the switches. The normal method to dampen the spike is to use an RCD snubber network across the switch, as illustrated i ...
... change of current, i.e. di/dt is very high, resulting in high voltage spikes to appear across the switches. If not properly controlled, the spikes may result in the destruction of the switches. The normal method to dampen the spike is to use an RCD snubber network across the switch, as illustrated i ...
Microwave oven
... Piece of cardboard covered with marsh-mallows. Video-camera and beamer to project an image of the marsh-mallows to the students. ...
... Piece of cardboard covered with marsh-mallows. Video-camera and beamer to project an image of the marsh-mallows to the students. ...
ppt
... A theoretical voltage source keeps the output voltage at a constant level regardless of the amount of current drawn by the circuit (load). Theoretical voltage source can provide any amount of current drawn by the circuit ...
... A theoretical voltage source keeps the output voltage at a constant level regardless of the amount of current drawn by the circuit (load). Theoretical voltage source can provide any amount of current drawn by the circuit ...
rtfx harmonic problems in capacitor banks
... 30% of harmonics in the current, will normally cause around 3% harmonics in the voltage. However a capacitor bank may increase the voltage harmonics to 8% or more. Tip: To know the effect of the capacitor bank on the harmonics, compare measurements of harmonics with and without connected capacitor b ...
... 30% of harmonics in the current, will normally cause around 3% harmonics in the voltage. However a capacitor bank may increase the voltage harmonics to 8% or more. Tip: To know the effect of the capacitor bank on the harmonics, compare measurements of harmonics with and without connected capacitor b ...
Full Wave Rectifier
... capacitor can be and allow C1 to discharge by only a small amount Fig. 3 giving a small amount of Ripple increased but only to the point where it is still able to charge to the peak voltage in half the period time of the AC, (one half cycle). This you will recall takes 5 Time Constants. Keeping the ...
... capacitor can be and allow C1 to discharge by only a small amount Fig. 3 giving a small amount of Ripple increased but only to the point where it is still able to charge to the peak voltage in half the period time of the AC, (one half cycle). This you will recall takes 5 Time Constants. Keeping the ...
Energy Storage Circuit Elements
... One might ask parenthetically what 'current' means here, since no charge flows between the electrodes. What follows is a qualitative meaning; a quantitative explanation would take us into realm of electromagnetic theory, too far afield of the present topic. If by whatever means one causes the charge ...
... One might ask parenthetically what 'current' means here, since no charge flows between the electrodes. What follows is a qualitative meaning; a quantitative explanation would take us into realm of electromagnetic theory, too far afield of the present topic. If by whatever means one causes the charge ...
Permanently reconfigured metamaterials due to
... contribute to the understanding of microplasma generation and gas breakdown in AC fields [15]. Additionally, the ability to electrically connect two objects could potentially lead to a form of non-contact welding. We begin by forming a conducting pathway between two isolated antennas, demonstrating ...
... contribute to the understanding of microplasma generation and gas breakdown in AC fields [15]. Additionally, the ability to electrically connect two objects could potentially lead to a form of non-contact welding. We begin by forming a conducting pathway between two isolated antennas, demonstrating ...
Chapter Nineteen
... Capacitors are “devices that oppose a change of voltage”, at their base level are a simple electrical storage device yet the applications for these devices are varied and wide ranging. Capacitors can be used in timing circuits, as electronic filters, and for power factor correction among other uses. ...
... Capacitors are “devices that oppose a change of voltage”, at their base level are a simple electrical storage device yet the applications for these devices are varied and wide ranging. Capacitors can be used in timing circuits, as electronic filters, and for power factor correction among other uses. ...
Analysis and Design of Switched Capacitor
... dielectric losses of a typical parallel plate construction. These losses are low in ceramic capacitors and very low in film capacitors. All capacitors require plate metallization and leads. Table 1 suggests that the resistance of the leads and plates dominates ESR for ceramic, film, and polymer elec ...
... dielectric losses of a typical parallel plate construction. These losses are low in ceramic capacitors and very low in film capacitors. All capacitors require plate metallization and leads. Table 1 suggests that the resistance of the leads and plates dominates ESR for ceramic, film, and polymer elec ...
Wireless Inductive Charging for Low Power Devices
... Inductive power transfer comprises a primary coil of an energy transmitter that generates a varying magnetic field across the secondary coil of the energy receiver within the field. The secondary coil should be tuned at the operating frequency to enhance charging efficiency. The quality factor is usua ...
... Inductive power transfer comprises a primary coil of an energy transmitter that generates a varying magnetic field across the secondary coil of the energy receiver within the field. The secondary coil should be tuned at the operating frequency to enhance charging efficiency. The quality factor is usua ...
A. Simulation of a Parallel Resonance Circuit
... 1. Construct the RLC series resonance circuit shown in Figure 2 in Multisim. Simulate the circuit at the frequencies shown in Table 2, and record the current readings obtained. The inductor self-resistance, RL = 65 Ω, has been included in the schematic. If the inductor you choose has different DC re ...
... 1. Construct the RLC series resonance circuit shown in Figure 2 in Multisim. Simulate the circuit at the frequencies shown in Table 2, and record the current readings obtained. The inductor self-resistance, RL = 65 Ω, has been included in the schematic. If the inductor you choose has different DC re ...
Compensation of a PFC Stage Driven by the NCP1654
... We have the choice between several techniques to define our compensation network like the “k factor” method from Dean Venable or the manual placement presented in Christophe Basso book [5]. Here, we propose to simply compensate our PFC stage by systematically forcing a (−1) slope for the open loop g ...
... We have the choice between several techniques to define our compensation network like the “k factor” method from Dean Venable or the manual placement presented in Christophe Basso book [5]. Here, we propose to simply compensate our PFC stage by systematically forcing a (−1) slope for the open loop g ...
wepls135
... Although the electronic ballast has many aspects of superior performance, it has a serious problem. When the line voltage is higher than the DC bus voltage, the input current has a narrow conduction angle, which producing a very poor power factor with rich harmonic components. These rich harmonic co ...
... Although the electronic ballast has many aspects of superior performance, it has a serious problem. When the line voltage is higher than the DC bus voltage, the input current has a narrow conduction angle, which producing a very poor power factor with rich harmonic components. These rich harmonic co ...
Imrie® Diagnostic Testing
... 7. If voltage reading is still low or no voltage, then the C.D.I. module is faulty, but before replacing the module check the flywheel / C.D.I. module air gap, the edge gap, the kill switch and the wire from the C.D.I. module to the ignition coil primary terminal for possible shorts, ...
... 7. If voltage reading is still low or no voltage, then the C.D.I. module is faulty, but before replacing the module check the flywheel / C.D.I. module air gap, the edge gap, the kill switch and the wire from the C.D.I. module to the ignition coil primary terminal for possible shorts, ...
7426ENEN 87V Measurement
... components generated by the ASD. And if the DMM isn’t shielded for high frequency noise, the drive controller’s high noise levels make the ...
... components generated by the ASD. And if the DMM isn’t shielded for high frequency noise, the drive controller’s high noise levels make the ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""