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Model EC5100 Speed Controller
Model EC5100 Speed Controller

... Directive requirements. It therefore has excellent reliability with respect to electrical transients. Additional features were also incorporated which make this model an even better value. An isochronous controller, capable of ±0.25% speed regulation, the EC5100 can be operated in droop mode simply ...
TSS521 Meter-Bus Transceiver
TSS521 Meter-Bus Transceiver

... Figure 4. Single Mode Bus Load At a bus fault the shut down time of VDD (toff) in which data storage can be performed depends on the system current IVDD and the value of capacitor CSTC. See Figure 5, which shows a correlation between the shutdown of the bus voltage VBUS and VDD_off and toff for dime ...
Micro Inverter Residential PV Commercial PV Central
Micro Inverter Residential PV Commercial PV Central

8-Outlet Power Strip with Surge Protection, 6
8-Outlet Power Strip with Surge Protection, 6

... where you need them, when you need them. The SS480806 contains a 6-ft. cord and 8 NEMA 5-15R outlets spaced 5.28 inches apart – wide enough to fit transformers or adapters without blocking adjacent outlets. To eliminate the need for a separate surge protector that can clutter up your work area, the ...
1.2kV thru 44kV Class Dry-Type Medium Voltage (Power)
1.2kV thru 44kV Class Dry-Type Medium Voltage (Power)

Micro sem i
Micro sem i

... • Operating & StorageTemperature: -65 C to +175 C • DC Power Dissipation: 500 mW @ TL = 25oC and maximum current IZM of 70 mA. NOTE: For optimum voltage-temperature stability, IZ = 7.5 mA (less than 50 mW in dissipated power) • Solder temperatures: 260 oC for 10 s (maximum) ...
s27R
s27R

... consume about 12 MW of real power and 70 MW of reactive power while transferring about 300 MW. The voltage drops as we approach the middle of an unloaded line; thus, the segmented line consumes slightly more reactive power because it models this drop. Note that real power flows from higher angles to ...
NCP3135 - 5 A Integrated Synchronous Buck Converter
NCP3135 - 5 A Integrated Synchronous Buck Converter

A Compact Switched-Capacitor Regulated Charge Pump
A Compact Switched-Capacitor Regulated Charge Pump

... with the battery and regulating the charging current as shown supplies charge to the load. in Fig. 4(a). During this time Fig. 4(b) shows the discharge phase in which the flying capacitor is put in series with the battery and discharged into the load ...
EC28 - aes journals
EC28 - aes journals

... communication link is determined in large part by the characteristics of the VCO and in today’s wireless communication systems greater frequency range is required by the VCOs. Traditionally, VCOs using CMOS technology have been used for low frequency applications, but submicron processes have allowe ...
Extended Operation of Flying Capacitor Multilevel
Extended Operation of Flying Capacitor Multilevel

... be extended by changing the ratio of the capacitor voltages. For the three-cell FCMI, four levels of operation are expected if the traditional ratio of the capacitor voltages is 1:2:3. However, by altering the ratio, the inverter can operate as a five-, six-, seven-, or eight-level inverter. Accordi ...
AP3171 N E W P R O D U C T Description Features Pin
AP3171 N E W P R O D U C T Description Features Pin

... 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: ...
EMC filters 2-line filters SIFI-F for normal insertion loss
EMC filters 2-line filters SIFI-F for normal insertion loss

... The conditions at the place of application must comply with all specifications for the filter used. Warning It shall be ensured that only qualified persons (electricity specialists) are engaged on work such as planning, assembly, installation, operation, repair and maintenance. They must be provided ...
DN05041 - 85-115 Vac Buck LED Driver
DN05041 - 85-115 Vac Buck LED Driver

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Buck-Converter Design Demystified

DWARF II - Trigon Audio
DWARF II - Trigon Audio

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... ground will not cause the IC and the system to malfunction by examining carefully all relevant factors and conditions such as motor characteristics, supply voltage, operating frequency and PCB wiring to name a few. ...
Alternating Current (AC) Circuits
Alternating Current (AC) Circuits

... output voltage in secondary coil is greater than input voltage in primary coil Transformer with N2 > N1 ...
Power Supply Sequencing Simplified
Power Supply Sequencing Simplified

... to the correct voltage in a designated amount of time. During the monitoring phase each power supply must remain within designated over- and undervoltage limits. During down-sequencing, each supply must wait its turn (often in a different order from up-sequencing), then power down within a configu ...
PQ_Unit II
PQ_Unit II

...  Supplying sensitive customer’s busbars from several substations. The effects of a voltage dip on one substation will be reduced by the influence of the others. The more independent these substations are, the more effective the measure is. The best reduction effect can be achieved by providing a po ...
Hev - Dolcera
Hev - Dolcera

PLL400-864AY 5V NARROWBAND PHASE-LOCKED LOOP Features
PLL400-864AY 5V NARROWBAND PHASE-LOCKED LOOP Features

... cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. The information in this publicati ...
B3603DC-DC Digital Control
B3603DC-DC Digital Control

Rarely Asked Questions R A Q ’ s A.
Rarely Asked Questions R A Q ’ s A.

... in communications and instrumentation systems to name a few applications. The economy model comprises a pair of amplifiers integrated with gain-setting and feedback resistors in a single package, simplifying the design and saving board space. This model provides high input impedance, low power and l ...
PT 12/24-60 - AltE Store
PT 12/24-60 - AltE Store

... 3.3 AUX Terminals The unit produces a small signal relay drive to power a large relay for auxiliary switching in a higher power array. This scheme uses the units advance PWM charge control technique to "finish" the charge on a battery in a very large power system. The unit power the AUX terminals to ...
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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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