Study of Transformer Resonant Overvoltages Caused by
... than on the low-voltage side (due to more turns), and it is particularly high in situations where the low-voltage winding is unloaded. Thus, high transformer external overvoltages are likely to occur if the following conditions are met as follows. 1) A transient occurs on the high-voltage side with ...
... than on the low-voltage side (due to more turns), and it is particularly high in situations where the low-voltage winding is unloaded. Thus, high transformer external overvoltages are likely to occur if the following conditions are met as follows. 1) A transient occurs on the high-voltage side with ...
LM2574/LM2574HV SIMPLE SWITCHER 0.5A Step
... The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 are ...
... The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 are ...
PDF
... current (BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundamental freque ...
... current (BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundamental freque ...
MAX17497A/MAX17497B AC-DC and DC-DC Peak Current-Mode Converters with Integrated Step-Down Regulator General Description
... Programmable current limit allows proper sizing and protection of the primary switching FET. The devices support a maximum duty cycle greater than 92% and provides programmable slope compensation to allow optimization of control-loop performance. The devices provide an open-drain RESETN pin that ser ...
... Programmable current limit allows proper sizing and protection of the primary switching FET. The devices support a maximum duty cycle greater than 92% and provides programmable slope compensation to allow optimization of control-loop performance. The devices provide an open-drain RESETN pin that ser ...
MPQ8636 - Mouser Electronics
... current can go negative in light-load conditions. Figure 2 shows CCM operation. When VFB is below VREF, HS-FET turns on for a fixed interval determined by the one- shot on-timer, as per equation 1. When the HS-FET turns off, the LSFET turns on until the next period. ...
... current can go negative in light-load conditions. Figure 2 shows CCM operation. When VFB is below VREF, HS-FET turns on for a fixed interval determined by the one- shot on-timer, as per equation 1. When the HS-FET turns off, the LSFET turns on until the next period. ...
Journal of Power Electronics, Vol. 14, No. 6, pp
... DC/AC converter, which requires energy storage elements, such as battery or capacitor banks. These DVRs suffer from disadvantages, such as limited time of compensation, high cost, and bulky energy storage devices [14]-[17]. The second group of DVRs is realized without a DC link using direct AC/AC co ...
... DC/AC converter, which requires energy storage elements, such as battery or capacitor banks. These DVRs suffer from disadvantages, such as limited time of compensation, high cost, and bulky energy storage devices [14]-[17]. The second group of DVRs is realized without a DC link using direct AC/AC co ...
Designing Single phase inverter - Faculty of Engineering - An
... The boost circuit works by connecting the power inductor L to ground that current can flow through it by turning on Q(Where Q is the IGBT transistor). After a little bit of time, we disconnect the L from ground (by turning off Q) this means that there is no longer a path for the current in L to flow ...
... The boost circuit works by connecting the power inductor L to ground that current can flow through it by turning on Q(Where Q is the IGBT transistor). After a little bit of time, we disconnect the L from ground (by turning off Q) this means that there is no longer a path for the current in L to flow ...
Microwave Oven Service Manual LD510D CAUTION
... the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water. • The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 19 ...
... the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water. • The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 19 ...
LAPORAN PROJEK SARJANA MUDA
... to upgrade existing system, component or else in order to catch up with new technologies. There are many types of interference that may be harmful to sensitive components in electrical power system such as voltage sags or called voltage dip. ...
... to upgrade existing system, component or else in order to catch up with new technologies. There are many types of interference that may be harmful to sensitive components in electrical power system such as voltage sags or called voltage dip. ...
AND8490 - Theory and Applications of the NCP1294, Switching
... to provide a high value to the end customer. The controller should draw no more than 300 mW from either the output or input while not actively converting so all unnecessary circuitry should be turned off unless both the battery and the solar panel are installed. Two positive enable circuits have to ...
... to provide a high value to the end customer. The controller should draw no more than 300 mW from either the output or input while not actively converting so all unnecessary circuitry should be turned off unless both the battery and the solar panel are installed. Two positive enable circuits have to ...
Professional Radio Portable Detailed Service Manual
... ALWAYS keep the radio more than six inches (15 cm) from their pacemaker when the radio is turned ON. not carry the radio in the breast pocket. use the ear opposite the pacemaker to minimize the potential for interference. turn the radio OFF immediately if you have any reason to suspect that interfer ...
... ALWAYS keep the radio more than six inches (15 cm) from their pacemaker when the radio is turned ON. not carry the radio in the breast pocket. use the ear opposite the pacemaker to minimize the potential for interference. turn the radio OFF immediately if you have any reason to suspect that interfer ...
Paper - CPES - Virginia Tech
... coil and receiver coil is required. This characteristics is not user-friendly. Therefore, a well-designed WPT system with omnidirectional power transfer capability is highly attractive in consumer electronics application [4-6]. The focus of these work is how to utilize three dimensional (3D) transmi ...
... coil and receiver coil is required. This characteristics is not user-friendly. Therefore, a well-designed WPT system with omnidirectional power transfer capability is highly attractive in consumer electronics application [4-6]. The focus of these work is how to utilize three dimensional (3D) transmi ...
NA555, NE555, SA555, SE555 Precision Timers
... Figure 9. Circuit for Monostable Operation Monostable operation is initiated when TRIG voltage falls below the trigger threshold. Once initiated, the sequence ends only if TRIG is high for at least 10 µs before the end of the timing interval. When the trigger is grounded, the comparator storage time ...
... Figure 9. Circuit for Monostable Operation Monostable operation is initiated when TRIG voltage falls below the trigger threshold. Once initiated, the sequence ends only if TRIG is high for at least 10 µs before the end of the timing interval. When the trigger is grounded, the comparator storage time ...
Ch9 Intro to Power Supplies
... • The design of a power supply is a true engineering challenge in the optimization of performance, price, and space • Larger valued, higher quality, higher price external components usually translate into higher performance • An optimal power supply design, however, will meet the required performanc ...
... • The design of a power supply is a true engineering challenge in the optimization of performance, price, and space • Larger valued, higher quality, higher price external components usually translate into higher performance • An optimal power supply design, however, will meet the required performanc ...
NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077 High-Voltage Switcher for
... The NCP107x products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP−7 or SOT−223 package, the NCP107x offer a high level of integration, including soft−start, frequency−jittering, short−circuit protection, skip−cycle, a maximum peak current set point, ra ...
... The NCP107x products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP−7 or SOT−223 package, the NCP107x offer a high level of integration, including soft−start, frequency−jittering, short−circuit protection, skip−cycle, a maximum peak current set point, ra ...
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.""