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No joules for surges: Relevant and realistic assessment of
No joules for surges: Relevant and realistic assessment of

... voltage, with the complication of a volt-time characteristic such that failure under impulse occurs at a level that increases when the rise time or duration of the impulse decreases. "Insulation" is to be taken in the broadest sense of solid or liquid material separating energized conductors in equi ...
Analog Devices Welcomes Hittite Microwave Corporation www.analog.com www.hittite.com
Analog Devices Welcomes Hittite Microwave Corporation www.analog.com www.hittite.com

DOEPFER System A-100 Universal Vactrol Module A-101
DOEPFER System A-100 Universal Vactrol Module A-101

... universal vactrol module has available two variable resistors. Each resistor is realized as a light depending resistor (LDR) that is combined with a light emitting diode (LED) both put into a small light-proof case. The two terminals of each LDR are connected to the two terminals of the correspondin ...
NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077 High-Voltage Switcher for
NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077 High-Voltage Switcher for

... Unlike other monolithic solutions, the NCP107x is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65, 100 or 130 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency ...
2042 Cable Locator
2042 Cable Locator

Understanding Buck Power Stages Mode Power
Understanding Buck Power Stages Mode Power

... current being zero for a portion of the switching cycle. It starts at zero, reaches a peak value, and returns to zero during each switching cycle. The two different modes are discussed in greater detail later and design guidelines for the inductor value to maintain a chosen mode of operation as a fu ...
GE Multilin
GE Multilin

Lovato Electric | Energy and Automation
Lovato Electric | Energy and Automation

... Digital voltmeters, ammeters, wattmeters, frequency meters and cosphi meters Digital multimeters, expandible, with graphic LCD Single, two and three-phase connection Totally programmable digital outputs Communication interface RS485, RS232, USB, Ethernet for remote control and datalogger Data concen ...
G32A-EA Data Sheet
G32A-EA Data Sheet

... slide switches. Be sure to change the slide switch settings in accordance with the input method on page 3. Note: 1. For details of input selection slide switch settings, refer to Setting the Input Method. 2. The above examples are for when a G3PA-VD (except 60-A models) is used at 200 VAC. 3. When p ...
MAX5885 3.3V, 16-Bit, 200Msps High Dynamic Performance DAC with CMOS Inputs General Description
MAX5885 3.3V, 16-Bit, 200Msps High Dynamic Performance DAC with CMOS Inputs General Description

AAT2550 数据资料DataSheet下载
AAT2550 数据资料DataSheet下载

... termination. The charging current is programmable via external resistor from 100mA to 1A. In addition to these standard features, the device offers over-voltage, overcurrent, and thermal protection. The two step-down converters are highly integrated, operating at a switching frequency of 1.4MHz, min ...
BD9584F
BD9584F

... ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against th ...
BA1117FP
BA1117FP

... ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against th ...
16615
16615

... The charger shall be designed for heavy-duty industrial service and be capable of full-rated output indefinitely at temperatures between -10°C and +50°C. The charger shall be capable of recharging a fully discharged battery of the maintenance-free lead acid, conventional (wet) lead acid or nickel-ca ...
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... The A3010 RF amplifier is a discrete hybrid design, which uses thin film manufacturing processes for accurate performance and high reliability. This single stage GaAs FET feedback amplifier design displays impressive performance characteristics over a broadband frequency range. An RF choke is used f ...
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OPA4830

MAX3325 3V Dual RS-232 Transceiver with LCD Supply and Contrast Controller General Description
MAX3325 3V Dual RS-232 Transceiver with LCD Supply and Contrast Controller General Description

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Q POINT

MAX1898 Linear Charger for Single-Cell Li+ Battery General Description Features
MAX1898 Linear Charger for Single-Cell Li+ Battery General Description Features

... forms a complete charger for 1-cell lithium-ion (Li+) batteries. The MAX1898 provides accurate constant-current/constant-voltage charging. Battery regulation voltage accuracy is ±0.75% for optimum battery performance and cycle life. Charging current is user set, but is sensed internally so no extern ...
µPMICs for Multimedia Application Processors in a 3.0mm x 2.5mm WLP MAX8893A/MAX8893B/MAX8893C
µPMICs for Multimedia Application Processors in a 3.0mm x 2.5mm WLP MAX8893A/MAX8893B/MAX8893C

... The MAX8893A/MAX8893B/MAX8893C power-management integrated circuits (PMICs) are designed for a variety of portable devices including cellular handsets. The PMICs include a high-efficiency step-down DC-DC converter, five low-dropout linear regulators (LDOs) with programmable output voltages, individu ...
Maxstar® 150 STH
Maxstar® 150 STH

... agitation, arc stability and travel speeds while reducing heat input and distortion. ...
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LED

... As the voltage rises from 0v, nothing happens until the voltage reaches about 1.7v. At this voltage a red LED just starts to glow. As the voltage increases, the voltage across the LED remains at 1.7v but the current through the LED increases and it gets brighter. We now turn our attention to the cur ...
LP2985LV-N Micropower 150 mA Low-Noise Low-Dropout Regulator in SOT-23 and
LP2985LV-N Micropower 150 mA Low-Noise Low-Dropout Regulator in SOT-23 and

PS225001EN
PS225001EN

... Functional specification for 3-in-1 pad-mounted multi-phase 32-step voltage regulator with communication-ready controls 1. Scope 1.1. This specification covers electrical, mechanical, and safety features and characteristics of outdoor, pad-mounted, 3-in1 multi-phase, liquid-immersed, step-type volta ...
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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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