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LTC6906 - Micropower, 10kHz to 1MHz Resistor Set Oscillator in
LTC6906 - Micropower, 10kHz to 1MHz Resistor Set Oscillator in

... leaking into the SET pin causes a 0.1% frequency error. Similarly, 1G of leakage resistance across RSET (1000 • RSET) causes the same 0.1% error. ...
the control of switched reluctance drives
the control of switched reluctance drives

... The switched reluctance machine drives have gained considerable attention among researchers due to several reasons. First of all, the rotor construction is simple and robust, as it consists of pure (laminated) steel with neither permanent magnets, nor electrical windings, while the stator can be eas ...
MAX4880 Overvoltage-Protection Controller with Internal Disconnect Switch General Description
MAX4880 Overvoltage-Protection Controller with Internal Disconnect Switch General Description

... of the package. This pad is internally connected to GND. For the best thermal conductivity and higher power dissipation, solder the exposed pad to the ground plane. Do not use the ground-connected pad as the only electrical ground connection or ground return. Use GND (pin 6) as the primary electrica ...
GF2211111118
GF2211111118

... proceeding to take protective measures ,it is necessary to have an idea about the frequency and the magnitude of the voltage and current which can occur due to switching. The switching overvoltage can be dangerous for the equipment if their peak value exceeds the rated switching impulse withstand vo ...
IL300 - GES Electronics
IL300 - GES Electronics

... to the feedback transfer gain (K1) times the LED drive current ( VIN/R1 = K1 • IF). The op-amp will supply LED current to force sufficient photocurrent to keep the node voltage (Vb) equal to Va. The output photodiode is connected to a non-inverting voltage follower amplifier. The photodiode load res ...
LM1036 - Rcl
LM1036 - Rcl

... these pins is 1.3 kX and the bass boost/cut will be approximately 3 dB less with XC at this value. An example of such modified response curves is shown in Figure 6 . The input coupling capacitors may also modify the low frequency response. It will be seen from Figures 2 and 3 that modifying Ct and C ...
XMT 350 Series
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... allows for any input voltage hookup (208–575 V, single- or three-phase) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable input power. ...
Introduction to Meters and Voltage Measurement
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... In principle, measuring voltage is easy—you simply connect a voltmeter across the circuit element whose voltage you wish to determine, then read the value from the meter as indicated in Figure 1-1. However, there are important practical considerations. In this lab, you will look at a number of these ...
NCV7680EVB/D NCV7680 Evaluation Board Manual •
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... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
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Proceedings of the 15th IEEE International Symposium
Proceedings of the 15th IEEE International Symposium

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Design and Implementation of a Stand-Alone Remote Terminal Unit Prachi Sharma

ds-8c rain/snow sensor controller
ds-8c rain/snow sensor controller

... The Low Temperature Cutoff (LTC) option is typically used on snow melting systems with limited output capacity where melting cannot be maintained at very low temperature. If selected, the snow sensor will clear a trigger below 5°F (-15°C) even if snow is still falling. It will resume normal operati ...
Piezoelectric Accelerometers
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... In addition to the temperature characteristics mentioned above, accelerometers exhibit a slowly varying output when subjected to temperature transients, caused by so-called pyroelectric effect. This is specified by temperature transient sensitivity baT. Temperature transient outputs are below 10 Hz. ...
12-Bit High Speed, Low Power Sampling
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... The ADS7834 is a 12-bit sampling analog-to-digital converter (A/D) complete with sample/hold, internal 2.5V reference, and synchronous serial interface. Typical power dissipation is 11mW at a 500kHz throughput rate. The device can be placed into a power-down mode that reduces dissipation to just 2.5 ...
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twelve pulse scr control board

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Durham Research Online
Durham Research Online

... voltage of a STATCOM. As illustrated in Fig. 4c, there are three capacitor voltage regulators (PI controller) that adjust the DC link voltages to their desired value and eliminate the error between reference value and measured value of voltage capacitor. The output of each PI controller is multiplie ...
TS3006 - Silicon Labs
TS3006 - Silicon Labs

... oscillator/timer fully specified to operate at a supply voltage range of 1.55V to 5.25V while consuming less than 2.4μA(max) supply current. Requiring only a resistor to set the base output frequency (or output period) at 25kHz (or 40µs) with a 50% duty cycle, the TS3006 timer/oscillator is compact, ...
Datasheet - RobotShop
Datasheet - RobotShop

... Higher quality load cells cancel out the effects of temperature using two techniques. By matching the expansion rate of the strain gauge to the expansion rate of the metal it’s mounted on, undue strain on the gauges can be avoided as the load cell warms up and cools down. The most important method o ...
g320x servo drive
g320x servo drive

... Set the STEP pulse generator to 40 pulses per second. If you are using a CNC program, use the “JOG” command. Turn on the power supply; the FAULT indicator (red) will turn off after 1 second and the IN-POSITION indicator (green) will turn on. Start sending step pulses (JOG). The IN-POSITION indicator ...
AD4101172176
AD4101172176

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Electrical Disturbances 2012

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Applications of Power Electronics in Automotive Power
Applications of Power Electronics in Automotive Power

... slow that rotor eddy currents are not important. A practical consideration that is not widely appreciated is the effect of rotor eddy currents on the duration of the load dump transient. If, for example, one instantaneously removes the field current (in an attempt to instantly drive the field flux t ...
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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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