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ZXTP2014G Features Mechanical Data
ZXTP2014G Features Mechanical Data

... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
Siemens Sirius Soft Starter - Industrial Drives and Controls Ltd
Siemens Sirius Soft Starter - Industrial Drives and Controls Ltd

... Belt slippage on heating systems (HVAC) blowers or water pressure surges in industrial washing systems are just two of many potential problems that can occur if motors output too much power when starting. Such problems can be reliably tackled using our SIRIUS 3RW30/31 up to 55 kW (at 400 V). But th ...
AD7858 数据手册DataSheet下载
AD7858 数据手册DataSheet下载

... Mark/Space ratio for the master clock input is 40/60 to 60/40. ...
Appendix D-4  Electrical Advanced-Level Training Issue Date:  12/29/11
Appendix D-4 Electrical Advanced-Level Training Issue Date: 12/29/11

Analog Devices ADuC845, ADuC847, ADuC848 Data Sheet
Analog Devices ADuC845, ADuC847, ADuC848 Data Sheet

... 3 levels of Flash/EE program memory security In-circuit serial download (no external hardware) High speed user download (5 seconds) 2304 bytes on-chip data RAM 8051-based core 8051-compatible instruction set High performance single-cycle core 32 kHz external crystal On-chip programmable PLL (12.58 M ...
TLV431x Low-Voltage Adjustable Precision
TLV431x Low-Voltage Adjustable Precision

... adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 6 V with two external resistors (see Figure 20). These devices operate from a lower voltage (1.24 V) than the w ...
Lab Assignment 5: Diode Circuits
Lab Assignment 5: Diode Circuits

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122 uses ultrasound.p65

... The heat generated in tissue can help alleviate muscle aches. For medical imaging, much lower intensity ultrasound radiation is used. There are several advantages for using ultrasound in medical diagnoses. During pregnancy, the foetus is very sensitive to ionising radiation like x-rays and the risk ...
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BDTIC www.BDTIC.com/infineon H a r d C o m m...

... In the 200V to 250V medium voltage range, up until now, Infineon has been offering industry leading OptiMOS™ 3 devices with the lowest figure of merit (RDS(on) x Qg). They not only provide the lowest RDS(on) for highest efficiency, but also low gate charge for ultra-fast switching in high frequency ...
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Sensorless Start-up and Control of Permanent Magnet Synchronous

... out into deeper waters with continuously increasing pump ratings. Due to these, start-up of subsea pump motors with long tieback distance and high breakaway torque becomes more and more relevant. Lack of sufficient expertise and right tools for analyses and calculations can easily lead to over dimen ...
ZX5T951G Features Mechanical Data
ZX5T951G Features Mechanical Data

... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
LVDS Owner’s Manual Including High-Speed CML and Signal Conditioning 2008 national.com/LVDS
LVDS Owner’s Manual Including High-Speed CML and Signal Conditioning 2008 national.com/LVDS

... amplitude but opposite polarity at the receiver. Logic ones and zeros are generated in this manner. CML and LVPECL have a similar architecture but with different strength current sources and termination schemes. V+ ...
MAX1232 - Maxim Part Number Search
MAX1232 - Maxim Part Number Search

... low for a time tPBD, the pushbutton reset delay time. The reset outputs remain in their active states for a minimum of 250ms after PBRST rises above VIH (Figure 3). A mechanical pushbutton or an active logic signal can drive the PBRST input. The debounced input ignores input pulses less than 1ms and ...
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... public electricity supply grid. Together with the market regulations, the technical regulations, including the system operation regulations, constitute the non-discriminating set of rules to be complied with by the players. The current version of the technical regulations is available at www.energin ...
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... When an inductive load is switched off, the power MOS portion goes into avalanche behavior. Maximum allowable energy in avalanche behavior is specified in "Absolute Maximum Ratings" as EAS1. The energy dissipation for an inductive load switch-off single pulse in device (EAS1) is estimated by the fol ...
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Diapositiva 1 - WikiService.at
Diapositiva 1 - WikiService.at

ZXTN2011Z Features Mechanical Data
ZXTN2011Z Features Mechanical Data

... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
Fundamentals and Advancements in Generator
Fundamentals and Advancements in Generator

... position nearly immediately to match the power system. If the speed and position of the rotor are closely matched at the instant the generator is connected to the power system, the transient torque required to bring the rotor and prime mover into synchronism is acceptable. If the position, as measur ...
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A CMOS QPSK Demodulator Frontend for GPON Fei Chen

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Design With PIN Diodes

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instruction manual cs-7b

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Modeling and Simulation of Transient Fault Response at

... should be dimensioning for future wind farms. An investigation of over and under voltages at the main transformer and the turbines inside Lillgrund wind farm was the main goal. The results will be used in the planning stage of future wind farms when performing insulation coordination and determining ...
BD4155FV
BD4155FV

... © 2010 ROHM Co., Ltd. All rights reserved. ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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