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283111 Fire Alarm Submittal Package - NET 12.11.12
283111 Fire Alarm Submittal Package - NET 12.11.12

Transformer Calculations
Transformer Calculations

Design and Evaluation of Cascode GaN FET for Switching Power
Design and Evaluation of Cascode GaN FET for Switching Power

... Recently, as consumers have demanded highly efficient and smaller handheld devices, and as communications and consumer electronics advance in technology, a high-efficiency power conversion system with a higher operating frequency than that of the current systems has become a significant research foc ...
SN74LV374AT 数据资料 dataSheet 下载
SN74LV374AT 数据资料 dataSheet 下载

... On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or high-impedance state. In the high-impe ...
Operational Transconductance Amplifiers
Operational Transconductance Amplifiers

... analog music synthesizers, because it can act as a two-quadrant multiplier as we’ll see later. For this application the control input has to have a wide dynamic range of at least 60 dB, while the OTA should behave sensibly when overdriven from the signal input (in particular, it should not lock up o ...
Less energy. Enhanced performances.
Less energy. Enhanced performances.

... If the electrical current through an HID lamp is properly stabilized, an HID plasma arc with very high luminous efficiency is created in the arc tube chamber resulting in a very efficient light source. The internal pressure of the arc tube chamber rises as the arc tube temperature increases and will ...
4ACTS – Automatic Closed Transition Transfer Switch (Pub 2017R1)
4ACTS – Automatic Closed Transition Transfer Switch (Pub 2017R1)

sirius - Siemens
sirius - Siemens

... positioned between the individual devices of the SIRIUS industrial controls portfolio for the assembly of load feeders and the SIMATIC ET 200S motor starters. Featuring a multitude of technical highlights, the SIRIUS 3RA6 compact starter caters to current market trends. For example, miniaturization ...
SP339 数据资料DataSheet下载
SP339 数据资料DataSheet下载

... termination and four configuration modes allow all three protocols to be used interchangeably over a single cable or connector with no additional switching components. Full operation requires only four external charge pump capacitors. The RS-485/422 modes feature one driver and one receiver (1TX/1RX ...
AN13 - High Speed Comparator Techniques
AN13 - High Speed Comparator Techniques

Power Specialist`s App Note Book
Power Specialist`s App Note Book

... Within the wide family of Switch Mode Power Supplies (SMPS), the Flyback converter represents the preferred structure for use in small and medium power applications such as wall adapters, off-line battery chargers, fax machines, etc. The calculations involved in the design of a Flyback converter, es ...
MAX9317/MAX9317A/MAX9317B/MAX9317C Dual 1:5 Differential Clock Drivers with LVPECL Inputs and LVDS Outputs
MAX9317/MAX9317A/MAX9317B/MAX9317C Dual 1:5 Differential Clock Drivers with LVPECL Inputs and LVDS Outputs

... Note 1: Measurements are made with the device in thermal equilibrium. Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative. Note 3: DC parameters are production tested at +25°C. DC limits are guaranteed by design and characterization over the full operating ...
GaN Technology for High Frequency Applications
GaN Technology for High Frequency Applications

... • GaN/MOSFET Integration – Integration of III-V HEMTs and Si (100) MOSFETs ...
by Submitted in partial fulfilment of the requirements for the degree
by Submitted in partial fulfilment of the requirements for the degree

... first temperature interval of 0 to 25 °C is due to the fact that amplitude control is not fully effective, as the oscillation amplitude is still building up. Using the temperature stabilised loop, the overall frequency stability has improved to 16 parts per million (ppm)/°C from an uncompensated val ...
Transformer
Transformer

... •Thus at any particular power factor, the efficiency is maximum if core loss = copper loss .This can be obtained by differentiating the expression of efficiency with respect to I2 assuming power factor, and all the voltages constant. •At any particular I2 maximum efficiency happens at unity power fa ...
MAX9374/MAX9374A Differential LVPECL-to-LVDS Translators General Description Features
MAX9374/MAX9374A Differential LVPECL-to-LVDS Translators General Description Features

... is available for single-ended operation. The MAX9374 is designed for low-voltage operation from a 2.375V to 2.625V power supply for use in 2.5V systems. The MAX9374A is designed for 3.0V to 3.6V operation in systems with a nominal 3.3V supply. Both devices are offered in industry-standard 8-pin SOT2 ...
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox
AX-SIGFOX - Ultra-Low Power, AT Command Controlled, Sigfox

... Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Exposure to absolute maximum rating conditions for extended periods may affect dev ...
1761-SG001 - Rockwell Automation
1761-SG001 - Rockwell Automation

... The MicroLogix 1400 controller is our newest family of controllers to join the popular MicroLogix 1000, MicroLogix 1100, MicroLogix 1200, and MicroLogix 1500 controllers, and is designed to broaden application coverage through available embedded analog inputs, Ethernet communication, faster high-spe ...
High Voltage, Quad-Channel 12-Bit Voltage Output DAC AD5504
High Voltage, Quad-Channel 12-Bit Voltage Output DAC AD5504

... AD5504 is powered up initially. This gives the user the ability to program the DAC registers to the required value while typically only consuming 30 μA of supply current. The AD5504 incorporates power-on reset circuitry that ensures the DAC registers power up in a known condition and remain there un ...
MAX98357A/MAX98357B PCM Input Class D Audio Power Amplifiers General Description Features
MAX98357A/MAX98357B PCM Input Class D Audio Power Amplifiers General Description Features

... The digital audio interface is highly flexible with the MAX98357A supporting I2S data and the MAX98357B supporting left-justified data. Both ICs support 8 channel time division multiplexed (TDM) data. The digital audio interface accepts specified sample rates between 8kHz and 96kHz for all supported ...
REG670 Generator Protection Relay – Commissioning Guide  Anders Hermans
REG670 Generator Protection Relay – Commissioning Guide Anders Hermans

... Protective relays are used in power systems to assure maximum continuity of service and to minimize the outage times. This is the main objective in a power system. As it was also stated in the IEEE standard (IEEE C37.90), the task of protective relays is to constantly monitor the power system to det ...
SPECIFICATIONS SEWAGE/SUMP DUPLEX SYSTEM
SPECIFICATIONS SEWAGE/SUMP DUPLEX SYSTEM

... pump. The control panel shall include a transformer to reduce control voltage to 115 volts. Also included shall be a numbered terminal strip and a high water alarm and light. Panel shall have a NEMA-4X rating. Electrical components shall be sized for a Zoeller ...
ConstantColor™ CMH TD
ConstantColor™ CMH TD

Customer Guideline 7542‐2009‐3 KWHDG‐2 0
Customer Guideline 7542‐2009‐3 KWHDG‐2 0

... connection is acceptable. If the Customer feels that the CIA result is manageable, the Customer returns the signed Cost Estimate Study Agreement with the payment as required by Kitchener-Wilmot Hydro. Within 60 days from receipt of signed Cost Estimate Study Agreement and payment, Kitchener-Wilmot H ...
Performance improvement of Insulator string in polluted conditions
Performance improvement of Insulator string in polluted conditions

... Nowadays, the operators apply empirical methods to overcome pollution effects which increase insulation stability in some cases. These methods are not scientific or documental, so they losses or malfunctions are inevitable. In high pollution regions, insulation design encounter problems and network ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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