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C:\Users\roland\Documents\WTT2013\WTT-LED
C:\Users\roland\Documents\WTT2013\WTT-LED

... In contrast, bulk effect photoconductors have no junction. As shown in Figure 2, the bulk resistivity decreases with increasing illumination, allowing more photocurrent to flow. This resistive characteristic gives bulk effect photoconductors a unique quality: signal current from the detector can be ...
B140WS Features Mechanical Data
B140WS Features Mechanical Data

... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
Power-Combined Multipliers at 60 GHz Based on Fundamental
Power-Combined Multipliers at 60 GHz Based on Fundamental

... High-power source plays an important role in millimeter and sub-millimeter and terahertz applications such as communication, imaging and radar systems. The recent advance in monolithic microwave integrated circuit (MMIC) amplifiers based on GaN transistors can provide several watts at W-band, one ord ...
Improve Operating Efficiency and Reduce Installed Cost
Improve Operating Efficiency and Reduce Installed Cost

... With lower DC bus capacitance, the Altivar 212 drive has a reduced capacity to ride through AC power line dips or sags. The Altivar 212 drive has an auto-restart feature and a robust catch-on-the-fly algorithm designed to minimize the effect of voltage dips and sags. The catch-on-the-fly algorithm h ...
Si4455 LOW-POWER PA MATCHING
Si4455 LOW-POWER PA MATCHING

... Low variation over temperature and supply voltage Low BOM and cost Silicon Labs provides switched PA mode Class E (CLE) type matching network for the Si4455 RFICs which are documented in this Application Note. The CLE type has the best efficiency but higher VDD and temperature variations. Its cu ...
Micro Family
Micro Family

... Output Connections and Considerations The permissible load current must never be exceeded during normal, abnormal or test conditions. Converters subject to dynamic loading exceeding 25% of rated current must be reviewed by Vicor Applications Engineering to ensure that the converter will operate prop ...
SKY77182 数据资料DataSheet下载
SKY77182 数据资料DataSheet下载

... matching circuits. The output match is realized off-chip within the module package to optimize efficiency and power performance into a 50 Ÿ load. This device is manufactured with Skyworks’ InGaP GaAs Heterojunction Bipolar Transistor (HBT) process that provides for all positive voltage DC supply ope ...
battery saver - Kussmaul Electronics
battery saver - Kussmaul Electronics

... mounting holes provided. Be certain that adequate ventilation is available and that the unit is not subject to weather damage. 2. Connect the 115VAC input power to the BATTERY SAVER through a 3-wire line cord as shown in INSTALLATION WIRING DIAGRAM, Figure 1. 3. The low voltage connections are made ...
Bias spectroscopy and simultaneous SET charge state
Bias spectroscopy and simultaneous SET charge state

... In order to better observe the triple points and their evolution with the applied DC bias, the source-drain conductance of the double dot was measured using a standard lock-in technique. The measurement was done using a 20 μV AC voltage signal applied at 78Hz, combined with the DC offset voltage of ...
PART 9 - ELECTRICAL SYSTEM
PART 9 - ELECTRICAL SYSTEM

Series 935 Retrofit Guide
Series 935 Retrofit Guide

... the controlled part of the process. This feature allows the control of one process as a ratio of another process. This is especially useful in applications that mix two materials, whether steam, paint or food ingredients. SSR – Solid State Relay, these devices will switch AC voltage only and require ...
Design and Performance of a High Temperature Superconducting
Design and Performance of a High Temperature Superconducting

... The maximum air gap field which has been reached is 1.8 T which allowed 0.7 T. It was not possible to inject higher current because of the thermal limitation on the copper winding. As a result, if the machine has to guarantee a higher activation field, a dedicated design of the windings is needed ...
V. C. Summer Nuclear Station, Units 2 and 3 COL Application
V. C. Summer Nuclear Station, Units 2 and 3 COL Application

... The breaker-and-a-half configuration has multiple connections made between the buses. Each connection between the buses is made with three circuit breakers and two circuits (referred to as a bay). This arrangement allows for breaker maintenance without interruption of service. A fault on either bus ...
Risk assessment of catastrophic failures in electric power systems L
Risk assessment of catastrophic failures in electric power systems L

... Besides the causes of the degradation of the power system reliability listed previously, there is the detrimental role played by the protection systems during large disturbances. As revealed by the study undertaken by the NERC over the period from 1984 to 1988 [9–12], in 73.5% of the significant dis ...
280-20
280-20

... Types D and DV single-phase automatic circuit reclosers from Eaton’s Cooper Power Systems provide reliable, economical overcurrent protection for distribution systems. Designed for 15 kV (Type D) and 15-34.5 kV (Type DV) system applications such as sectionalizing single-phase branches of three-phase ...
Electromagnetic Induction - Goodheart
Electromagnetic Induction - Goodheart

... Inductors are combined with other components for use in many specific types of circuits. For example, inductors are combined with capacitors to form a wide variety of filter circuits. Adjustable ferrite core inductors are used in radios to tune a circuit by passing or rejecting the specific frequencies ...
AN2834 Application note How to get the best ADC accuracy in STM32F10xxx devices
AN2834 Application note How to get the best ADC accuracy in STM32F10xxx devices

Primary Surge Protectors Installation Instructions
Primary Surge Protectors Installation Instructions

... This Surge Protector unit is provided with a set of Form ‘C’ contacts (FIG. 1) which can be wired to indicate when the Surge Protector has sustained damage. The contacts are rated at 2A 30Vdc, 0.6A 110Vdc, 0.6A 125VAC. By common convention, the NO (normally open) and NC (normally closed) contacts ad ...
BASIC ELECTRONICS
BASIC ELECTRONICS

... Direct current voltage is what comes out of batteries. The battery is at 9V, and it pretty much keeps that voltage constant, until it dies. The chemical reactions inside the battery create DC voltage. Most of the Electronic circuits work on DC voltage. Alternating current voltage is what comes out o ...
Accelerating Voltage Amplitude and Phase Stabilization for the
Accelerating Voltage Amplitude and Phase Stabilization for the

... 100 kV in the injection and extraction regions, the three dee voltages being in phase or * 120’ out of phase depending on the harmonic in use [3]. The design phase stability is below + 0.2’ for an ...
AN2007-06 - MA300Exx, Module Adapter Boards for PrimePACK
AN2007-06 - MA300Exx, Module Adapter Boards for PrimePACK

... Active voltage clamping is a technique which keeps transient VCE overvoltages below VCES when the IGBT switches off. The standard approach to active clamping is to use a chain of avalanche diodes connected between the auxiliary collector and the gate of an IGBT module. When the VCE voltage exceeds t ...
Application of fuzzy logic control algorithm as stator power controller
Application of fuzzy logic control algorithm as stator power controller

... active and reactive powers, many problems arise, when the generator is connected to the grid, such as the low power factor and harmonic pollutions. Several designs and arrangements have been investigated by using predictive functional and internal mode controller, where a satisfactory power response ...
Series 965 Retrofit Guide
Series 965 Retrofit Guide

... the controlled part of the process. This feature allows the control of one process as a ratio of another process. This is especially useful in applications that mix two materials, whether steam, paint or food ingredients. SSR – Solid State Relay, these devices will switch AC voltage only and require ...
Helium Detection via Field Ionization from Carbon Nanotubes
Helium Detection via Field Ionization from Carbon Nanotubes

... of adsorbates on a CNT tip and could account for the observed fluctuations in ionization current. However, such a mechanism here is surprising, given the sample cleaning procedure outlined above, and further experiments are being conducted to clarify this point. The sample’s field emission character ...
PART 9 - ELECTRICAL SYSTEM
PART 9 - ELECTRICAL SYSTEM

< 1 ... 567 568 569 570 571 572 573 574 575 ... 1974 >

Mains electricity



Mains electricity is the general-purpose alternating-current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity, house current, powerline, domestic power, wall power, line power, AC power, city power, street power, and grid power.The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most of Asia, most of South America and Australia. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other voltages exist, and some countries may have, for example, 230 V but 60 Hz. This is a concern to travelers, since portable appliances designed for one voltage and frequency combination may not operate or may be destroyed by another.The use of different plugs and sockets in different regions provides some protection from accidental use of appliances with incompatible voltage and frequency requirements.
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