Lesson: 23
... The primary of the transformer shown in figure 23.2 is energized from a.c source and potential of terminal 1 with respect to terminal 2 is v12 = Vmaxsinωt. Naturally polarity of 1 is sometimes +ve and some other time it is –ve. The dot convention helps us to determine the polarity of the induced vol ...
... The primary of the transformer shown in figure 23.2 is energized from a.c source and potential of terminal 1 with respect to terminal 2 is v12 = Vmaxsinωt. Naturally polarity of 1 is sometimes +ve and some other time it is –ve. The dot convention helps us to determine the polarity of the induced vol ...
Trade of Motor Mechanic Module 4
... volts, typically 18000 volts. This high firing voltage causes the spark gap to become electrically conductive, enabling an ignition spark to occur. It must have sufficient heat energy to ignite the mixture so that it can continue to burn by itself. Exactly how much energy is required varies accordin ...
... volts, typically 18000 volts. This high firing voltage causes the spark gap to become electrically conductive, enabling an ignition spark to occur. It must have sufficient heat energy to ignite the mixture so that it can continue to burn by itself. Exactly how much energy is required varies accordin ...
large capacity double-rating voltage transformer
... electric power companies to which they are supplied. Consequently, with cost-effectiveness as the driving concern there has been a doubling of the voltage specification and extension of the operating voltage range for the future long-distance transmission. Moreover, there are transportation restrict ...
... electric power companies to which they are supplied. Consequently, with cost-effectiveness as the driving concern there has been a doubling of the voltage specification and extension of the operating voltage range for the future long-distance transmission. Moreover, there are transportation restrict ...
Distributed Generation in Power System Network to Alleviate
... Input to the PWM inverter is DC voltage produced from a DC source. The harmonics in the voltage from the PWM inverter is filtered out by an LC low pass filter and the voltage is stepped up by using a step up transformer. The output LC filter is connected to remove high switching frequency components ...
... Input to the PWM inverter is DC voltage produced from a DC source. The harmonics in the voltage from the PWM inverter is filtered out by an LC low pass filter and the voltage is stepped up by using a step up transformer. The output LC filter is connected to remove high switching frequency components ...
Selecting a Littelfuse Varistor
... line can be drawn on the log - log, V-I characteristic as shown in Figure 3. The two curves intersect at the peak current value. The rated single pulse current, ITM, is the maximum allowable for a single pulse of 8/20µs exponential waveform (illustrated in Application Note AN9767, Figure 21). For lo ...
... line can be drawn on the log - log, V-I characteristic as shown in Figure 3. The two curves intersect at the peak current value. The rated single pulse current, ITM, is the maximum allowable for a single pulse of 8/20µs exponential waveform (illustrated in Application Note AN9767, Figure 21). For lo ...
Inverter topologies
... The result of the output is a multi “stepped” sine wave, which is the sum of the output of the three different small inverters. All the “inverters”, can ad or subtract to the wave form output. Inverter A will switch at 50 Hz. The transformer’s output voltage would be approximately 320V peak. Inverte ...
... The result of the output is a multi “stepped” sine wave, which is the sum of the output of the three different small inverters. All the “inverters”, can ad or subtract to the wave form output. Inverter A will switch at 50 Hz. The transformer’s output voltage would be approximately 320V peak. Inverte ...
P10511: Miniaturization of Xerography
... match with the actual surface speed within 5mm/sec. – Input a surface speed through the LabVIEW interface – While photoreceptor is spinning, apply a tachometer to the surface of the photoreceptor and record the speed – Compare the tachometer reading with the speed input ...
... match with the actual surface speed within 5mm/sec. – Input a surface speed through the LabVIEW interface – While photoreceptor is spinning, apply a tachometer to the surface of the photoreceptor and record the speed – Compare the tachometer reading with the speed input ...
simple "toneburst" detection circuit
... The minimum 22 kHz input level (from the Bus) may be about 300 millivolts pk-pk (allowing for some drop in the cable), and the maximum about 1 volt pk-pk. Although the detector circuits can tolerate some variation of signal amplitude, a ratio of more than 1 : 3 could produce difficulties, so some fo ...
... The minimum 22 kHz input level (from the Bus) may be about 300 millivolts pk-pk (allowing for some drop in the cable), and the maximum about 1 volt pk-pk. Although the detector circuits can tolerate some variation of signal amplitude, a ratio of more than 1 : 3 could produce difficulties, so some fo ...
DR34722727
... factor in an especially fractional horse-power BLDC motor drive for Home applications. It is usually achieved by elimination of the drive components (F.L.Luo et al., 2005), (AtefSalehOthman et al., 2009) such as power switches and sensors. The switching losses are to be reduced and the power dissipa ...
... factor in an especially fractional horse-power BLDC motor drive for Home applications. It is usually achieved by elimination of the drive components (F.L.Luo et al., 2005), (AtefSalehOthman et al., 2009) such as power switches and sensors. The switching losses are to be reduced and the power dissipa ...
MXT2576 Series SIMPLE SWITCHER 3A Step
... If the operating temperature range includes temperatures below 25 C, the input capacitor value may need to be larger. With most electrolytic capacitors, the capacitance value decreases and the ESR increases with lower temperatures and age. Paralleling a ceramic or solid tantalum capacitor will incre ...
... If the operating temperature range includes temperatures below 25 C, the input capacitor value may need to be larger. With most electrolytic capacitors, the capacitance value decreases and the ESR increases with lower temperatures and age. Paralleling a ceramic or solid tantalum capacitor will incre ...
ELECTRONCS AND ELECTRICAL ENGINEERING
... thyristors is possible to replace these device by IGBT transistors in bidirectional switch connection (conductivity of triac or thyristor is ended when current is reduced to zero but on the other side conductivity of IGBT can be ended according to the actual needs). This substitution enables to use ...
... thyristors is possible to replace these device by IGBT transistors in bidirectional switch connection (conductivity of triac or thyristor is ended when current is reduced to zero but on the other side conductivity of IGBT can be ended according to the actual needs). This substitution enables to use ...
3. VLSI Implementation of the Proposed Frequency
... increases the spectral purity of the signal generated by the voltage controlled oscillator (VCO). The frequency resolution of the CMOS frequency synthesizer is equal to the reference frequency of 1MHz applied at the circuit input. The loop bandwidth (provided by the LPF2) has to be significantly low ...
... increases the spectral purity of the signal generated by the voltage controlled oscillator (VCO). The frequency resolution of the CMOS frequency synthesizer is equal to the reference frequency of 1MHz applied at the circuit input. The loop bandwidth (provided by the LPF2) has to be significantly low ...
Slide 1
... • Average dc voltage Vd can be controlled from a positive maximum to a negative minimum on a continuous basis • The converter dc current Id can not change direction • Two-quadrant operation • Rectification mode (power flow is from the ac to the dc side): +Vd & +Id • Inverter mode (power flow is from ...
... • Average dc voltage Vd can be controlled from a positive maximum to a negative minimum on a continuous basis • The converter dc current Id can not change direction • Two-quadrant operation • Rectification mode (power flow is from the ac to the dc side): +Vd & +Id • Inverter mode (power flow is from ...
PHYSICS UNIT 3 Detailed Study: Further electronics
... In fact, given that the half cycle time is 0.01 second, the capacitor can still be discharging through the load resistor when the next half cycle (I) begins and increases to above the capacitor voltage at that time. With a large enough capacitor and load resistor, an almost straight line can be ach ...
... In fact, given that the half cycle time is 0.01 second, the capacitor can still be discharging through the load resistor when the next half cycle (I) begins and increases to above the capacitor voltage at that time. With a large enough capacitor and load resistor, an almost straight line can be ach ...
Astable multivibrator circuit
... and inevitable slight asymmetries will mean that one of the transistors is first to switch on. This will quickly put the circuit into one of the above states, and oscillation will ensue. In practice, oscillation always occurs for practical values of R and C. However, if the circuit is temporarily he ...
... and inevitable slight asymmetries will mean that one of the transistors is first to switch on. This will quickly put the circuit into one of the above states, and oscillation will ensue. In practice, oscillation always occurs for practical values of R and C. However, if the circuit is temporarily he ...
CrCM PFC Boost Converter Design - Digi-Key
... Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infi ...
... Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infi ...
Power Factor Control..
... The UC1854 uses average current-mode control to accomplish fixedfrequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients. The UC ...
... The UC1854 uses average current-mode control to accomplish fixedfrequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients. The UC ...
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.""