Today’s Topics - Department of Electrical Engineering
... Motors, Generators and Transformers with very different sizes and nominal values. To be able to compare the performances of a big and a small element, per unit system is used. In per unit system, each electric quantity is measured as a decimal fraction of some base level ...
... Motors, Generators and Transformers with very different sizes and nominal values. To be able to compare the performances of a big and a small element, per unit system is used. In per unit system, each electric quantity is measured as a decimal fraction of some base level ...
Comparing Circuit Protection Technologies for 48 V DC in High
... • Power Transient Voltage Suppressor (PTVS) are solid state devices that use diode avalanche breakdown to shunt surge energy • Used on AC and DC power supplies in harsh ...
... • Power Transient Voltage Suppressor (PTVS) are solid state devices that use diode avalanche breakdown to shunt surge energy • Used on AC and DC power supplies in harsh ...
lecture12
... To find xf , the asymptotic final value, we assume that the circuit will be in steady-state as t goes to infinity. So we assume that the capacitor is acting like an open circuit. We then find the value of current or voltage we are looking for using this open-circuit assumption. Here, we use the circ ...
... To find xf , the asymptotic final value, we assume that the circuit will be in steady-state as t goes to infinity. So we assume that the capacitor is acting like an open circuit. We then find the value of current or voltage we are looking for using this open-circuit assumption. Here, we use the circ ...
Available in PDF:
... capacitor collapses due to air ionizing resulting in the entire applied voltage being across the solder mask dielectric. This can easily exceed the rupture voltage of this material resulting in a direct high voltage short. If any pad metallization becomes exposed due to Townsend partial discharges t ...
... capacitor collapses due to air ionizing resulting in the entire applied voltage being across the solder mask dielectric. This can easily exceed the rupture voltage of this material resulting in a direct high voltage short. If any pad metallization becomes exposed due to Townsend partial discharges t ...
Scribe Notes
... and column. But since they measure from the electrode to earth (ground), there are issues when it comes to multitouch. This is called ghosting, which is when there is ambiguity with the rows and columns when there are two or more touches. Mutual Capacitance Touch Screens Enable multi-touch because o ...
... and column. But since they measure from the electrode to earth (ground), there are issues when it comes to multitouch. This is called ghosting, which is when there is ambiguity with the rows and columns when there are two or more touches. Mutual Capacitance Touch Screens Enable multi-touch because o ...
ee 255 electronics i laboratory experiment 3 the series
... When designing a regulated power supply, we usually would want to use an integrated circuit regulator whenever possible. These regulators are easy to use and often provide other capabilities such as current limiting, short-circuit protection and temperature compensation. However, you will often enco ...
... When designing a regulated power supply, we usually would want to use an integrated circuit regulator whenever possible. These regulators are easy to use and often provide other capabilities such as current limiting, short-circuit protection and temperature compensation. However, you will often enco ...
Haynes Retro Radio Instruction Manual
... unit. The negative terminal is identified by a white stripe and has the shorter pin. A capacitor contains two metal sheets that are insulated from each other these can be charged up and therefore the capacitor can store electrical energy. In this experiment the electrolytic capacitor charges up to a ...
... unit. The negative terminal is identified by a white stripe and has the shorter pin. A capacitor contains two metal sheets that are insulated from each other these can be charged up and therefore the capacitor can store electrical energy. In this experiment the electrolytic capacitor charges up to a ...
The Full-wave Rectifier
... top of the DC voltage. Too low a value and the capacitor has little effect. As a general rule of thumb, we are looking to have a ripple voltage of less than 100mV peak to peak. The main advantages of a full-wave bridge rectifier is that it has a smaller AC ripple value for a given load and a smalle ...
... top of the DC voltage. Too low a value and the capacitor has little effect. As a general rule of thumb, we are looking to have a ripple voltage of less than 100mV peak to peak. The main advantages of a full-wave bridge rectifier is that it has a smaller AC ripple value for a given load and a smalle ...
high step-up converter with three-winding coupled
... A novel high step-up interleaved converter for high-power high-voltage applications is proposed in this paper. Through three-winding coupled inductors, a high step-up conversion with High efficiency is obtained. The proposed converter not only reduces the current stress, but also constrains the inpu ...
... A novel high step-up interleaved converter for high-power high-voltage applications is proposed in this paper. Through three-winding coupled inductors, a high step-up conversion with High efficiency is obtained. The proposed converter not only reduces the current stress, but also constrains the inpu ...
Chapter 5
... • Measuring output voltage may not be very practical • P = Vp2/2R is difficult to measure in an antenna! • However, measuring the current passing through an antenna may be more possible: Total Power is PT = IT2R ...
... • Measuring output voltage may not be very practical • P = Vp2/2R is difficult to measure in an antenna! • However, measuring the current passing through an antenna may be more possible: Total Power is PT = IT2R ...
Linear Circuit Elements
... The numeric value of the signal frequency f has significant practical ramifications to us electrical engineers, beyond that of simply determining the numeric value G ω . These practical ramifications include the packaging, manufacturing, and interconnection of electrical and electronic devices. T ...
... The numeric value of the signal frequency f has significant practical ramifications to us electrical engineers, beyond that of simply determining the numeric value G ω . These practical ramifications include the packaging, manufacturing, and interconnection of electrical and electronic devices. T ...
induced polarisation
... - press the “ON/OFF” button. The VIP displays “VIP self test, do not touch any key”, then, after 20s: “VIP ready, time domain 2s on 2s off” - press the “R” key to measure the ground resistance: R = 0.9 kΩ - press the “HV” key. The VIP starts injecting 100mA. The maximum current which the VIP can tra ...
... - press the “ON/OFF” button. The VIP displays “VIP self test, do not touch any key”, then, after 20s: “VIP ready, time domain 2s on 2s off” - press the “R” key to measure the ground resistance: R = 0.9 kΩ - press the “HV” key. The VIP starts injecting 100mA. The maximum current which the VIP can tra ...
Lab #9 AC Circuits - Northern Arizona University
... 4. Current through a capacitor leads the voltage across it by Δt of T/4, meaning that the current peak occurs before the voltage peak by 1/4th of a period. Remember ELI the ICE man from lab 7? 5. For sinusoidal voltage and current, the current through a capacitor leads the voltage across it by a pha ...
... 4. Current through a capacitor leads the voltage across it by Δt of T/4, meaning that the current peak occurs before the voltage peak by 1/4th of a period. Remember ELI the ICE man from lab 7? 5. For sinusoidal voltage and current, the current through a capacitor leads the voltage across it by a pha ...
The United Kingdom Amateur Radio (Foundation) Licence
... Capacitors, diodes and meters (such as voltmeters). If these components (and a few others) are not correctly inserted, observing the correct polarities it will usually result in damaging the component so that it can no longer be used. AC or ‘Alternating Current’ is different from DC (‘Direct Current ...
... Capacitors, diodes and meters (such as voltmeters). If these components (and a few others) are not correctly inserted, observing the correct polarities it will usually result in damaging the component so that it can no longer be used. AC or ‘Alternating Current’ is different from DC (‘Direct Current ...
LM747.PDF
... The LM747 is a general purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent. Additional features of the LM747 are: no latch-up when input common mode range is exceeded, freedom from oscillation ...
... The LM747 is a general purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent. Additional features of the LM747 are: no latch-up when input common mode range is exceeded, freedom from oscillation ...
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.""