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Lesson – 12
Lesson – 12

... 12.3.2 Operation of a three phase uncontrolled bridge rectifier supplying a capacitive load A three phase uncontrolled bridge rectifier supplying a capacitive load is a very popular power electronic converter. It is very widely used as the front end of a variable voltage variable frequency dc – ac i ...
maxon EC motor EC 45 flat with integrated electronics Document ID: 919801en
maxon EC motor EC 45 flat with integrated electronics Document ID: 919801en

Y4101148153
Y4101148153

... This paper deals with the electronic load controller for self exited induction generator using PID plus fuzzy logic controller. The self-excited induction generators (SEIGs) are considered to be well suited for generating electricity by means of conventional energy sources and for supplying electric ...
LT3505 - 1.2A, Step-Down Switching Regulator in 3mm x 3mm DFN
LT3505 - 1.2A, Step-Down Switching Regulator in 3mm x 3mm DFN

... The LT3505 is a constant frequency, current mode stepdown regulator. A resistor-programmed oscillator enables an RS flip-flop, turning on the internal 1.4A power switch Q1. An amplifier and comparator monitor the current flowing between the VIN and SW pins, turning the switch off when this current r ...
Power supply 640mA RMD uninterruptible 75010015
Power supply 640mA RMD uninterruptible 75010015

... In the event of overload or overvoltage at the bus output, the fault message is stored. In this case, the potential-free change-over contact and the corresponding LED continue to remain in the fault state even if the cause of the fault message no longer exists and if the bus is again supplied with p ...
OVERCURRENT RELAY WITH IDMT
OVERCURRENT RELAY WITH IDMT

... The Hokkim IDMT Earthfault & Overcurrent Relays have a setting for time delay tap instead of a setting for time delay interval. Models with adjustable time delay intervals will trip after the set delay irregardless of the magnitude of the fault or over current. For IDMT models, the delay time varies ...
RF3183 QUAD-BAND/GSM850/EGSM900 /DCS/PCS/POWER AMPLIFIER MODULE Features
RF3183 QUAD-BAND/GSM850/EGSM900 /DCS/PCS/POWER AMPLIFIER MODULE Features

... RF input to the high-band PA. It is DC-blocked within the part. Digital input enables either the low band or high band amplifier die within the module. A logic low selects Low Band (GSM850/EGSM900), a logic high selects High Band (DCS1800/PCS1900). This pin is a high impedance CMOS input with no pul ...
LM2901EP Low Power Low Offset Voltage
LM2901EP Low Power Low Offset Voltage

... For operating at high temperatures, the LM2901EP must be derated based on a 125°C maximum junction temperature and a thermal resistance of 95°C/W which applies for the device soldered in a printed circuit board, operating in a still air ambient. The low bias dissipation and the “ON-OFF” characterist ...


Comparative Analysis of Series and Parallel Photovoltaic Arrays
Comparative Analysis of Series and Parallel Photovoltaic Arrays

... Single-stage central inverter (CI) topologies have been widely used due to its simplicity and high converter efficiency, since it does not requires a step-up dc-dc converter. Normally these PV systems use a large number of modules in series for direct connection of the PV array to the inverter. The ...
MAX1479 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter General Description
MAX1479 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter General Description

... in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster ...
mfiis template
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Rectifier output smoothing
Rectifier output smoothing

... For a given tolerable ripple the required capacitor size is proportional to the load current and inversely proportional to the supply frequency and the number of output peaks of the rectifier per input cycle. The load current and the supply frequency are generally outside the control of the designer ...
TC78H600FNG/FTG
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... [1] The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a moment. Do not exceed any of these ratings. Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. [2] Use ...
DS1810 5V EconoReset with Push
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MC34671, High Input Voltage 600mA Charger for Single-cell
MC34671, High Input Voltage 600mA Charger for Single-cell

AN2787
AN2787

... JP1 DSCG pin setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 JP3 phase control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 JP4 1.8 V divider selection . . . . . ...
Reducing Magnetic Interaction in Reed Relay Applications
Reducing Magnetic Interaction in Reed Relay Applications

... equipment, Reed Relays are typically placed in proximity to one another. Magnetic coupling between relays can affect parameters such as pull-in and dropout voltage. In some circumstances, adjacent relays will be adversely affected by their neighbors. Experimental data is provided for some basic Reed ...
Sine PWM and its Realization
Sine PWM and its Realization

... are of high frequencies. In some applications, like ac motor drive application, the inherent low pass filtering characteristics of the motor-load itself is enough to satisfactorily block the flow of harmonic currents to the load. In such cases the need for external filter may not arise. It may be ob ...
LS4148/LS4448
LS4148/LS4448

Multiple Clock and Voltage Domains for Chip Multi Processors
Multiple Clock and Voltage Domains for Chip Multi Processors

... bigger components, increasing cost and incurring more board space close to the CMP, a requirement that may be hard or impossible to meet. The advantage of a single voltage domain is the capability of sharing the current among the cores; when some cores consume less current or are turned off, current ...
BC203 Regenerative Drive Adjustable Speed DC Control
BC203 Regenerative Drive Adjustable Speed DC Control

BH2226F(V) - ROHM Semiconductor
BH2226F(V) - ROHM Semiconductor

... This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a parasitic diode or transistor. For example (refer to figure below): W ...
Godoy, P.A., S. Chung, T.W. Barton, D.J. Perreault, and J.L. Dawson, “A 2.5 GHz Asymmetric Multilevel Outphasing PA in 65 nm CMOS,” 2011 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications , pp. 57-60, Jan. 2011.
Godoy, P.A., S. Chung, T.W. Barton, D.J. Perreault, and J.L. Dawson, “A 2.5 GHz Asymmetric Multilevel Outphasing PA in 65 nm CMOS,” 2011 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications , pp. 57-60, Jan. 2011.

... PAPR of 6.1dB. The testbench is shown in Fig. 9. The digital baseband data generation and associated signal processing were performed in MATLAB and uploaded into the internal RAM of an FPGA. The baseband amplitude data was fed from the FPGA to the PA supply modulator shown in Fig. 5. To implement th ...
thiet ke web
thiet ke web

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Electrical substation



A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control.A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. The word substation comes from the days before the distribution system became a grid. As central generation stations became larger, smaller generating plants were converted to distribution stations, receiving their energy supply from a larger plant instead of using their own generators. The first substations were connected to only one power station, where the generators were housed, and were subsidiaries of that power station.
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