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using intelligent power modules - Mitsubishi Electric Corporation
using intelligent power modules - Mitsubishi Electric Corporation

Experiment : 1
Experiment : 1

... breakdown region. Once the reverse-bias potential reaches the Zener region, the ideal Zener diode is assumed to have fixed terminal voltage and zero internal resistance. All practical diodes some internal resistance which is limited to 5 to 20 Ω. The experimental procedure will show the variation in ...
DC Drives
DC Drives

... “generated” back to the supply. • In other words, during the deceleration phase, kinetic energy from the motor and load inertia is returned to the supply. • This is known as regenerative braking-an efficient way to brake a motor. Widely employ in electric vehicle and electric trains. If we wish the ...
MAX14562 - Part Number Search
MAX14562 - Part Number Search

MAX1082/MAX1083 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference General Description
MAX1082/MAX1083 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference General Description

... Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has been calibrated. Note 3: Offset nulled. Note 4: Ground the “on” channel; sine wave is applied to all “off” channels. Note 5: Conversion time is defined as the number o ...
NLAS7222B, NLAS7222C High-Speed USB 2.0 (480 Mbps) DPDT Switches
NLAS7222B, NLAS7222C High-Speed USB 2.0 (480 Mbps) DPDT Switches

... ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any partic ...
Design optimizations of phase noise, power consumption and
Design optimizations of phase noise, power consumption and

... noise plays a significant role in phase noise as device size reduces significantlyŒ6 . It is straightforward to reduce flicker noise by large transistor size and small transconductanceŒ7 . However, large size transistors limit the frequency tuning range, and the start-up condition is difficult to ...
Chapter 6 SIGNAL CONDITIONING AND SIGNAL
Chapter 6 SIGNAL CONDITIONING AND SIGNAL

... If one intends to keep the data in the time domain, sufficient samples must be taken so that transients and pulses are adequately sampled. The Nyquist Sampling Theorem states that a bare minimum sampling rate is twice the signal bandwidth; that is, the -3 dB frequency of the lowpass filter must be s ...
MAX1878 Dual-Output Step-Down and LCD Step-Up Power Supply for PDAs General Description
MAX1878 Dual-Output Step-Down and LCD Step-Up Power Supply for PDAs General Description

... switch. This switch remains on until the minimum ontime of 440ns expires and the output voltage regulates or the current-limit threshold is exceeded. Once off, the high-side switch remains off until the minimum off-time of 390ns expires and the output voltage falls out of regulation. During this per ...
Technical specification - DAE e
Technical specification - DAE e

... ii. Uncontrolled Diode bridge rectifier. iii. Variable voltage chopper circuit. iv. Three phase IGBT bridge. v. Output transformer. i. DSP Controller: This VFD controller is heart of the system, which controls the operation of 3phase Inverter bridge entire drive unit. This is required for PAM genera ...
AD626 - Analog Devices
AD626 - Analog Devices

... The amplifier’s inputs are protected against continuous overload of up to 50 V, and RFI filters are included in the attenuator network. The output range is +0.03 V to +4.9 V using a +5 V supply. The amplifier provides a preset gain of 10, but gains between 10 and 100 can be easily configured with an ...
TRANSIENT VOLTAGE SUPPRESSOR COMPLIANCE TO
TRANSIENT VOLTAGE SUPPRESSOR COMPLIANCE TO

... impedance (R θJX ) in degrees Centigrade per Watt at very short transient heating times to help minimize p-n junction heating at very high power levels. This can also be dependent on the bond qualities to the active TVS die element and immediate surrounding material. NOTE: The thermal time-constant ...
a Low Noise, Precision Instrumentation Amplifier AMP01*
a Low Noise, Precision Instrumentation Amplifier AMP01*

... 26 MHz gain-bandwidth product. These features make the AMP01 ideal for high speed data acquisition systems. Gain is set by the ratio of two external resistors over a range of 0.1 to 10,000. A very low gain temperature coefficient of 10 ppm/°C is achievable over the whole gain range. Output voltage s ...
AD8065-6 145MHz, 5-24V RRO.pdf
AD8065-6 145MHz, 5-24V RRO.pdf

... Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. N ...
Precision_Power_Art Series Axxx Amplifiers
Precision_Power_Art Series Axxx Amplifiers

2. NF effects
2. NF effects

... sees the resistance of the voltage divider. To study the effect on negative feedback on the input resistance of the amplifier it is necessary to avoid the influence of the resistance of the divider on the small signal resistance seen by the signal source. The solution is to use the bootstrap method ...
Power Module Reliability - Mitsubishi Electric Corporation
Power Module Reliability - Mitsubishi Electric Corporation

Feedback
Feedback

MART-03 - Marthel
MART-03 - Marthel

... Note that audio signals at both speaker outputs are at DC voltage of about 1.5 V and are phase shifted each other by 180o. WARNING: Connection of speaker outputs (P13 and P26) both with each other and with electric ground may cause damage to the integrated circuit. In Power Down mode (when PD=H) the ...
UCS 500N5T
UCS 500N5T

design_review - Course Website Directory
design_review - Course Website Directory

PDF
PDF

... current (BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundamental freque ...
ADS850 数据资料 dataSheet 下载
ADS850 数据资料 dataSheet 下载

... power supplies and references must remain stable. The calibration registers are reset on the rising edge of the CAL signal. The actual calibration procedure begins at the falling edge of the CAL signal. Calibration is completed at the end of 32,775 cycles at 10MSPS, CAL = 3.28ms (see Timing Diagram ...
Safety Light Curtain 120V AC Interface - Allen
Safety Light Curtain 120V AC Interface - Allen

... The indicators "Restart Required" and "Weak Signal" are optional (output current 0...0.4A). In case of using this NPN indicator outputs on a PLC, a resistor (i.e. 1 kΩ/1 W) has to be connected between terminal 57-58 and/or 63-64 for potential equalization. The output signal is provided on terminal 5 ...
MTP40N10E Power MOSFET 40 Amps, 100 Volts
MTP40N10E Power MOSFET 40 Amps, 100 Volts

... “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ...
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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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