AN-556 Introduction to Power Supplies
... voltages since there is just one diode voltage drop. For 5V and 12V outputs, Schottky barrier diodes are commonly used since they have lower voltage drops than equivalently rated ultra-fast types, which further increases power conversion efficiency. However, each diode must withstand twice the rever ...
... voltages since there is just one diode voltage drop. For 5V and 12V outputs, Schottky barrier diodes are commonly used since they have lower voltage drops than equivalently rated ultra-fast types, which further increases power conversion efficiency. However, each diode must withstand twice the rever ...
A New Induction Motor V/F Control Method using Dspic30f5011
... of this work is to first convert the line voltage AC into DC. DC is again converted to single/three phase AC as per load requirements. The output voltage, frequency or both of inverter can be controlled by the application of power electronics and digital signal controller. The output voltage wavefor ...
... of this work is to first convert the line voltage AC into DC. DC is again converted to single/three phase AC as per load requirements. The output voltage, frequency or both of inverter can be controlled by the application of power electronics and digital signal controller. The output voltage wavefor ...
UCC38050 100W Critical Conduction (PFC) Reference Design (Rev. A
... accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability f ...
... accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability f ...
Synchronous Machine
... generator has a synchronous reactances of 1.5Ω/phase and negligible stator resistance. The generator is connected to an infinite bus (of constant voltage magnitude and constant frequency) at 415V and 60Hz. a) Determine the excitation voltage, EA when the machine is delivering rated kVA at 0.8 pf lag ...
... generator has a synchronous reactances of 1.5Ω/phase and negligible stator resistance. The generator is connected to an infinite bus (of constant voltage magnitude and constant frequency) at 415V and 60Hz. a) Determine the excitation voltage, EA when the machine is delivering rated kVA at 0.8 pf lag ...
Fixed Power Factor Correction Capacitors, with
... If the circuit is not accessible between the starter contacts and motor overload protective devices, capacitor may be connected on the load side of overloads provided that overloads are resized for reduced current. ...
... If the circuit is not accessible between the starter contacts and motor overload protective devices, capacitor may be connected on the load side of overloads provided that overloads are resized for reduced current. ...
Transformer Basics
... – “backflashes” - rise in the 500-2000KV per u-second range and 10-20 u-sec tail (cfo of line - positive polarity waves) – Direct strokes to phase wires (cfo due to negative polarity waves) slightly slower rise and longer tail than backflash BIL: Basic Impulse Level is the electrical strength of ins ...
... – “backflashes” - rise in the 500-2000KV per u-second range and 10-20 u-sec tail (cfo of line - positive polarity waves) – Direct strokes to phase wires (cfo due to negative polarity waves) slightly slower rise and longer tail than backflash BIL: Basic Impulse Level is the electrical strength of ins ...
Single Phase Half Wave Rectifier with R
... In this circuit, the transistor is either fully on or fully off; that is, driven between the extremes of saturation or cutoff. By avoiding the transistor's active" mode (where it would drop substantial voltage while conducting current), very low transistor power dissipations can be achieved. With li ...
... In this circuit, the transistor is either fully on or fully off; that is, driven between the extremes of saturation or cutoff. By avoiding the transistor's active" mode (where it would drop substantial voltage while conducting current), very low transistor power dissipations can be achieved. With li ...
MAX1615-16 - Maxim Integrated
... to CMOS RAM and microcontrollers (µCs) in systems with high-voltage batteries. Key features include wide input voltage range, low dropout voltage, and low quiescent supply current. Despite a miserly 8µA (max) no-load supply current, the MAX1615/MAX1616 have excellent line-transient response and AC p ...
... to CMOS RAM and microcontrollers (µCs) in systems with high-voltage batteries. Key features include wide input voltage range, low dropout voltage, and low quiescent supply current. Despite a miserly 8µA (max) no-load supply current, the MAX1615/MAX1616 have excellent line-transient response and AC p ...
Design of Z-Source Inverter for Voltage Boost Application
... power inverter has 6 switches that are controlled in order to generate an AC output from the DC input. PWM signals generated from the AT89C51 micro controller controls these 6 switches. The phase voltage is determined by the duty cycle of the PWM signals that are applied to the DCto –DC converter. A ...
... power inverter has 6 switches that are controlled in order to generate an AC output from the DC input. PWM signals generated from the AT89C51 micro controller controls these 6 switches. The phase voltage is determined by the duty cycle of the PWM signals that are applied to the DCto –DC converter. A ...
Step-up Transformers - Pacific Crest Transformers
... The preceding illustrates the basic components of a coal fired steam generation plant. Regardless of type of power generation (coal, water, natural gas, nuclear…), the power is produced at a relatively low voltage but high current and fed into generator step-up transformers (GSU). The high voltage ...
... The preceding illustrates the basic components of a coal fired steam generation plant. Regardless of type of power generation (coal, water, natural gas, nuclear…), the power is produced at a relatively low voltage but high current and fed into generator step-up transformers (GSU). The high voltage ...
UHF-R Specification Sheet
... The receiver shall have an user programmable menu-driven LC display showing group, channel, frequency, name, output level, squelch level, and lock status as well as the most important transmitter settings. It shall use technology such as MARCAD® signal combining circuitry for improved reception, min ...
... The receiver shall have an user programmable menu-driven LC display showing group, channel, frequency, name, output level, squelch level, and lock status as well as the most important transmitter settings. It shall use technology such as MARCAD® signal combining circuitry for improved reception, min ...
ECE 421
... when V2 reaches one VBE above ground. At this time the current will begin flowing through Q3 from the current source, and the stable operating point of the circuit will be reached. In order for this circuit to reach its stable operating point the current in the emitter Fig.1 Widlar current source of ...
... when V2 reaches one VBE above ground. At this time the current will begin flowing through Q3 from the current source, and the stable operating point of the circuit will be reached. In order for this circuit to reach its stable operating point the current in the emitter Fig.1 Widlar current source of ...
The Influence of the inhomogenuity of the field, the Ground Effect
... of the electrodes to the field distribution and the dielectric behaviour of horizontal rod-plate air gaps has been analytically and experimentally investigated. Especially investigated is the way in which the inhomogeneity of the field influences the appearance of the corona or the breakdown in a ro ...
... of the electrodes to the field distribution and the dielectric behaviour of horizontal rod-plate air gaps has been analytically and experimentally investigated. Especially investigated is the way in which the inhomogeneity of the field influences the appearance of the corona or the breakdown in a ro ...
Chapter 4
... doubler is _____ of the ac input. 282% The dc output in a well-filtered full-wave doubler is _____ of the ac input. 282% ...
... doubler is _____ of the ac input. 282% The dc output in a well-filtered full-wave doubler is _____ of the ac input. 282% ...
LM2662 Switch cap inverter-doubler.pdf
... The main application of LM2662/LM2663 is to generate a negative supply voltage. The voltage inverter circuit uses only two external capacitors as shown in the Basic Application Circuits. The range of the input supply voltage is 1.5V to 5.5V. For a supply voltage less than 3.5V, the LV pin must be co ...
... The main application of LM2662/LM2663 is to generate a negative supply voltage. The voltage inverter circuit uses only two external capacitors as shown in the Basic Application Circuits. The range of the input supply voltage is 1.5V to 5.5V. For a supply voltage less than 3.5V, the LV pin must be co ...
Tutorial 1
... What will happen if we change the switching sequence to (V0, V2, V3, V2, V0)? For (V0, V3, V2, V7, V2, V3, V0), what are the duty cycles (time periods) for each voltage vector? 5. A Space Vector Modulation technique is used in a three-phase inverter with an inductive load (star connection). a. Sketc ...
... What will happen if we change the switching sequence to (V0, V2, V3, V2, V0)? For (V0, V3, V2, V7, V2, V3, V0), what are the duty cycles (time periods) for each voltage vector? 5. A Space Vector Modulation technique is used in a three-phase inverter with an inductive load (star connection). a. Sketc ...
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.""