Requests for Information NLH-12 NP
... discusses criteria for the rehabilitation of hydroelectric power plants. In section 4.3.1 of the standard it states, “The stator is a component that deteriorates with time and temperature. A large percentage of outages are caused by stator winding failures. Because of the many improvements in insula ...
... discusses criteria for the rehabilitation of hydroelectric power plants. In section 4.3.1 of the standard it states, “The stator is a component that deteriorates with time and temperature. A large percentage of outages are caused by stator winding failures. Because of the many improvements in insula ...
digital system for power line frequency measurement
... fourth second. Therefore, frequency is calculated as an average obtained after exactly 100 periods of 50 Hz power line signal. Afterward, the controller generates new start signal that starts the next counting sequence. The calculated frequency value is represented by 24-bit two's complement value ...
... fourth second. Therefore, frequency is calculated as an average obtained after exactly 100 periods of 50 Hz power line signal. Afterward, the controller generates new start signal that starts the next counting sequence. The calculated frequency value is represented by 24-bit two's complement value ...
PDF
... to operating point is one of the major technical challenges of multilevel converters. In a NPC based three-level inverter, the DC-link voltage is shared by the capacitors, Unbalance of neutral voltage is caused due to the current flowing into and out of neutral point. Unbalance of potential of neutr ...
... to operating point is one of the major technical challenges of multilevel converters. In a NPC based three-level inverter, the DC-link voltage is shared by the capacitors, Unbalance of neutral voltage is caused due to the current flowing into and out of neutral point. Unbalance of potential of neutr ...
Buletin Stiintific - UPB - Seria C - numar 1 - 2010
... André LALLEMAND, Lingai LUO, Renaud GICQUEL Considering Carnot cycles, it is shown that reducing the power of a thermal power plant to produce cogeneration or using this difference in power to run heat pumps is equivalent in terms of overall performance. Practically, this is however not the same. Th ...
... André LALLEMAND, Lingai LUO, Renaud GICQUEL Considering Carnot cycles, it is shown that reducing the power of a thermal power plant to produce cogeneration or using this difference in power to run heat pumps is equivalent in terms of overall performance. Practically, this is however not the same. Th ...
TL494 Pulse-Width-Modulation Control Circuits (Rev. H)
... The design of the TL494 not only incorporates the primary building blocks required to control a switching power supply, but also addresses many basic problems and reduces the amount of additional circuitry required in the total design. The TL494 is a fixed-frequency pulse-width-modulation (PWM) cont ...
... The design of the TL494 not only incorporates the primary building blocks required to control a switching power supply, but also addresses many basic problems and reduces the amount of additional circuitry required in the total design. The TL494 is a fixed-frequency pulse-width-modulation (PWM) cont ...
J. Lu, D.J. Perreault and K.L. Afridi, “Impedance Control Network Resonant Converter for Wide-Range High-Efficiency Operation,” 2015 IEEE Applied Power Electronics Conference , pp. 1440-1447, March 2015.
... inverter leg lose ZVS turn-on capability. These factors result in extra losses and lead to lower converter efficiency at partial loads, and consequently to poor design tradeoffs. Other fixed frequency control techniques have also been developed [5], [6]. However, these also lose zero voltage switchi ...
... inverter leg lose ZVS turn-on capability. These factors result in extra losses and lead to lower converter efficiency at partial loads, and consequently to poor design tradeoffs. Other fixed frequency control techniques have also been developed [5], [6]. However, these also lose zero voltage switchi ...
Reactive Power Limit of Variable-Speed Constant
... constant-frequency wind turbine has become the main type in the global market. Although the performance of variable-speed constant-frequency wind turbine is much better than fixed-speed wind turbine, it is still an impact to the grid while it is integrated into the power system for variation of wind ...
... constant-frequency wind turbine has become the main type in the global market. Although the performance of variable-speed constant-frequency wind turbine is much better than fixed-speed wind turbine, it is still an impact to the grid while it is integrated into the power system for variation of wind ...
LATCHES AND FILP FLOPS
... The driving chip’s VOH(min) must be greater than the driven circuit’s VIH(min) , and the driver’s VOL(max) must be less than VIL(max) for the loading circuit. Voltage level shifters must be used to interface the circuits together if these voltage requirements are not met. Of course, a driving circui ...
... The driving chip’s VOH(min) must be greater than the driven circuit’s VIH(min) , and the driver’s VOL(max) must be less than VIL(max) for the loading circuit. Voltage level shifters must be used to interface the circuits together if these voltage requirements are not met. Of course, a driving circui ...
MAX8643 3A, 2MHz Step-Down Regulator with Integrated Switches General Description
... The MAX8643 high-efficiency switching regulator delivers up to 3A load current at output voltages from 0.6V to (0.9 x VIN).The IC operates from 2.35V to 3.6V, making it ideal for on-board point-of-load and postregulation applications. Total output error is less than ±1% over load, line, and temperat ...
... The MAX8643 high-efficiency switching regulator delivers up to 3A load current at output voltages from 0.6V to (0.9 x VIN).The IC operates from 2.35V to 3.6V, making it ideal for on-board point-of-load and postregulation applications. Total output error is less than ±1% over load, line, and temperat ...
Varistor Plus Single Layer Technology Varistor Glossary of Terms and Definitions Term
... Load Dump is a transient, which occurs in automotive environment. It is an exponentially decaying positive voltage that occurs in the event of a battery disconnect while the alternator is still generating charging current with other loads remaining on the alternator circuit at the time of battery di ...
... Load Dump is a transient, which occurs in automotive environment. It is an exponentially decaying positive voltage that occurs in the event of a battery disconnect while the alternator is still generating charging current with other loads remaining on the alternator circuit at the time of battery di ...
Low-Voltage FGMOS Based Voltage-to-Current Converter
... effects of VTC mainly including nonlinear second-order V-I characteristic, body effect, mobility degradation, temperature variation and so on [15-19]. Recently, many researchers have been developed a fixed gain V-I converter input stage with programmable gain current mirrors [20]-[23]. However, thes ...
... effects of VTC mainly including nonlinear second-order V-I characteristic, body effect, mobility degradation, temperature variation and so on [15-19]. Recently, many researchers have been developed a fixed gain V-I converter input stage with programmable gain current mirrors [20]-[23]. However, thes ...
Relative material
... feedback results when the signal being feed back is in phase with the input signal. Negative feedback occurs when the signal being feed back is 180 degrees out of phase with the input signal. In a common emitter or common collector amplifier, feedback is introduced into the base of the first stage t ...
... feedback results when the signal being feed back is in phase with the input signal. Negative feedback occurs when the signal being feed back is 180 degrees out of phase with the input signal. In a common emitter or common collector amplifier, feedback is introduced into the base of the first stage t ...
Inlet Air Temperature (IAT) Sensors
... Wiring harness to the ECU plug, check for continuity and short circuit to earth. • Measurement with a ohmmeter between sensor plug and removed ECU plug, measured value: < 1 Ohm (circuit diagram needed for pin definition) • Respective pin from the sensor plug checked for short circuit to earth, ECU p ...
... Wiring harness to the ECU plug, check for continuity and short circuit to earth. • Measurement with a ohmmeter between sensor plug and removed ECU plug, measured value: < 1 Ohm (circuit diagram needed for pin definition) • Respective pin from the sensor plug checked for short circuit to earth, ECU p ...
LS-103D - Precision Rated Optics
... To return product, you may contact us to obtain additional information if necessary. To serve you better, please specify the reasons for the return. All delivery and mails should be sent to the following address: ...
... To return product, you may contact us to obtain additional information if necessary. To serve you better, please specify the reasons for the return. All delivery and mails should be sent to the following address: ...
MAX44281 Ultra-Small, Ultra-Thin, 4-Bump Op Amp General Description Benefits and Features
... the output are high-impedance. The input and output of the MAX44281 enter a high-impedance state when the device enters shutdown. Since shutdown is triggered by lowering the supply voltage to below 0.5V, the ESD protection diodes at the output limit the high-Z voltage range of the output. Diode D2 i ...
... the output are high-impedance. The input and output of the MAX44281 enter a high-impedance state when the device enters shutdown. Since shutdown is triggered by lowering the supply voltage to below 0.5V, the ESD protection diodes at the output limit the high-Z voltage range of the output. Diode D2 i ...
Figure 2
... A particular simple situation can be set up for two identical pendulums. If you start the two swinging together, they will continue to swing in unison at their natural frequency. Alternatively, if they are started exactly l80 degrees out of phase (swinging in opposite directions), they will maintai ...
... A particular simple situation can be set up for two identical pendulums. If you start the two swinging together, they will continue to swing in unison at their natural frequency. Alternatively, if they are started exactly l80 degrees out of phase (swinging in opposite directions), they will maintai ...
Amateur Radio Technician Class Element 2 Course Presentation
... An advantage of a transceiver controlled by a direct digital synthesizer (DDS) is that it provides variable frequency with the stability of a crystal oscillator. (G7C05) Digital circuits called a synthesizer control the receive and transmit frequencies. ...
... An advantage of a transceiver controlled by a direct digital synthesizer (DDS) is that it provides variable frequency with the stability of a crystal oscillator. (G7C05) Digital circuits called a synthesizer control the receive and transmit frequencies. ...
Alternating Voltage and Current
... electrical equipment in parallel. The 120-V source of commercial electricity is the 60-Hz ...
... electrical equipment in parallel. The 120-V source of commercial electricity is the 60-Hz ...
Switched-mode power supply
A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.