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36-V, Prog.-Gain, Voltage-Output, Bidir, Zero
36-V, Prog.-Gain, Voltage-Output, Bidir, Zero

... The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 μA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package. ...
CT425 PID Temperature Controller
CT425 PID Temperature Controller

... On/Off and Alarm work similarly with the only difference being how Hysteresis is used. Please see the Hysteresis description for further information. When set to Disabled, the output is de-energized regardless of the Reverse Acting setting. Reverse Acting: Setting this to True causes the respective ...
Analysis of the Occurrence of a Three-Phase Short-Circuit
Analysis of the Occurrence of a Three-Phase Short-Circuit

... Extra-High-Voltage systems. For the 500kV system, the peak value of the line to ground 60Hz voltage is significant compared with the insulator strength (around 20%) which can be determining as far as flashovers are concerned. ...
SIMULATION WITH THE CUK TOPOLOGY  ECE562: Power Electronics I COLORADO STATE UNIVERSITY
SIMULATION WITH THE CUK TOPOLOGY ECE562: Power Electronics I COLORADO STATE UNIVERSITY

... D1 is an ideal diode from the library. Set to 700 mV (diode drop). C2 is an ideal capacitor from the library. Set to 22 µF. O1 is an ideal comparator used to turn the switch S1 on and off. By varying the width of V3 below, its output will act as a Pulse Width Modulator. S1 is a voltage controlled sw ...
TUNED LNA FOR RFICs - Dipartimento di Ingegneria dell
TUNED LNA FOR RFICs - Dipartimento di Ingegneria dell

... the control voltage VC, in the range [2.6 V – 2.9 V], it is possible to increase the input dynamic range up to -20 dBm without any modification of the resonance frequency and of the bandwidth but at the expenses of a voltage gain reduction. Finally in Table I a comparison among the main characteris ...
Datasheet - Diodes Incorporated
Datasheet - Diodes Incorporated

... The filtered PWM signal can be considered as an adjustable DC voltage. Such regulated signal is often with some grade of ripple because of some simple configuration of circuit. With appropriated arrangement of PWM frequency and level, and filter parameters, it can be used to replace the variable DC ...
Advanced PV System Design and Installation
Advanced PV System Design and Installation

... • The NEC defines grounding as a connection to the earth with sufficiently low impedance and having sufficient current-carrying capacity to prevent the buildup of voltages. • Grounding of electrical systems offers personnel safety and minimizes the effects of lightning and surges on equipment. ...
ADP1870 英文数据手册DataSheet 下载
ADP1870 英文数据手册DataSheet 下载

... The ADP1870/ADP1871 are versatile current-mode, synchronous step-down controllers that provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo-fixed frequency with a programmable currentlimit, current-control scheme. In addition, these ...
MAX2900–MAX2904 200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM Bands General Description
MAX2900–MAX2904 200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM Bands General Description

... while the PA stays in the off mode. For MAX2900/ MAX2901/MAX2903, the PLL also starts when EN goes high. After the lock-detect pin LD goes high, the PA is set to stand-by mode. For the MAX2902/MAX2904, the VCO loop has to be closed by using an external synthesizer. After this, pulling OOKIN high tur ...
BDJxxx1HFV Series - ROHM Semiconductor
BDJxxx1HFV Series - ROHM Semiconductor

... voltage source in one chip. Temperature detection can be realized at ±2.5°C accuracy without the need for a complicated design. It is the best suited for portable equipment of micro- and low-current, power down function, and battery drive. It is possible to use it for a wide range of applications su ...
AN60 - PCMCIA Card and Card Socket Power
AN60 - PCMCIA Card and Card Socket Power

... Application Note 60 flash drives, will have two 16-bit wide banks of memory to facilitate simultaneous writing and erasing. This speeds card operation but will double the current requirement. These cards will draw 120mA while writing/erasing. Additional Practical Considerations While the PCMCIA spe ...
Application Note 74 LM139/LM239/LM339 A Quad
Application Note 74 LM139/LM239/LM339 A Quad

... The LM139 can be used to symmetrically square up a sine wave centered around zero volts by incorporating a small amount of positive feedback to improve switching times and centering the input threshold at ground (see Figure 10). Voltage divider R4 and R5 establishes a reference voltage, V1, at the p ...
SN65HVS883 34 V, Eight-Channel Digital-Input
SN65HVS883 34 V, Eight-Channel Digital-Input

... The SN65HVS883 is an 8 channel, digital input serializer which operates from a 24 V supply and accepts digital inputs of up to 34 V on the 8 channels (IP0-IP7). The device provides a serially shifted digital output with reduced voltage ranges of 0-5 V for applications in industrial and building auto ...
SP485R 数据资料DataSheet下载
SP485R 数据资料DataSheet下载

... LOW to DE and a logic HIGH to RE. While in the shutdown mode, the power supply current is typically less than 1µA. The driver outputs are disabled and are at a high impedance state determined by the receiver input impedance which should be at least 120kΩ. The receiver output is at also at high imped ...
MAX2150 Wideband I/Q Modulator with Sigma-Delta Fractional-N Synthesizer General Description
MAX2150 Wideband I/Q Modulator with Sigma-Delta Fractional-N Synthesizer General Description

... The MAX2150 is a complete wideband direct upconversion quadrature modulator IC incorporating a 28-bit sigma-delta fractional-N synthesizer. The device is targeted for applications in the 700MHz to 2300MHz frequency range. The super-high-resolution sigma-delta fractional-N synthesizer is capable of b ...
Starting arrangements for a prime mover which is not for emergency
Starting arrangements for a prime mover which is not for emergency

... output in kVA + 1000 ...
74AC14, 74ACT14 Hex Inverter with Schmitt Trigger Input
74AC14, 74ACT14 Hex Inverter with Schmitt Trigger Input

... Not In Production ...
MAX3869 +3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APC General Description
MAX3869 +3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APC General Description

AN-1126: More Boost with Less Stress: the SEPIC
AN-1126: More Boost with Less Stress: the SEPIC

... relatively high (over 10:1) boost ratios. These topologies include ...
SN65LVDS116 数据资料 dataSheet 下载
SN65LVDS116 数据资料 dataSheet 下载

... voltage is present on the signal pair. The SN65LVDS116 receiver is like most differential line receivers, in that its output logic state can be indeterminate when the differential input voltage is between –100 mV and 100 mV and within its recommended input common-mode voltage range. Hovever, TI LVDS ...
ZXLD1360 Description Pin Assignments
ZXLD1360 Description Pin Assignments

... Operation can be best understood by assuming that the ADJ pin of the device is unconnected and the voltage on this pin (VADJ) appears directly at the (+) input of the comparator. When input voltage VIN is first applied, the initial current in L1 and RS is zero and there is no output from the current ...
BD5426MUV
BD5426MUV

... Technical Note ...
差分放大器系列AD8324 数据手册DataSheet 下载
差分放大器系列AD8324 数据手册DataSheet 下载

... used in a single-ended or differential configuration. If the input is used in the differential configuration, the input signals should be 180 degrees out of phase and of equal amplitude. A vernier is used in the input stage for controlling the fine 1 dB gain steps. This stage then drives a DAC, whic ...
Distribution High Impedance Fault Location Using Localized Voltage
Distribution High Impedance Fault Location Using Localized Voltage

... harmonic current phase angle with respect to the fundamental phase voltage and comparing it with stored values. Another approach performs system pattern recognition on harmonic current energy levels in the arcing fault. The loss of voltage due to a downed line could also be utilized to detect the fa ...
TDA1519C - HESTORE
TDA1519C - HESTORE

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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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