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teaching and examination scheme for post ssc diploma courses
teaching and examination scheme for post ssc diploma courses

... carrying out the analysis and investigation work. This subject finds utility in understanding the concepts in other electrical subjects such as Electrical Power System, Electrical Measurement and Instrumentation, & Electrical Machines etc. Objectives: The students will be able to: 1. Know and define ...
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Short questions and answers EE1251 Electrical Machines II 1. Why

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... the resistor will increase B. The current through the resistor will decrease C. The current of the resistor does not change A. ...
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RA33H1516M1 数据资料DataSheet下载

... for consumer mobile communication terminals and were not specifically designed for use in other applications. In particular, while these products are highly reliable for their designed purpose, they are not manufactured under a quality assurance testing protocol that is sufficient to guarantee the l ...
Naim Discrete Regulator
Naim Discrete Regulator

... At the heart of every voltage regulator is a voltage reference that should be as clean and as constant as possible since any noise or other fluctuations in the reference will be carried through to the regulator output. Naim Discrete Regulator uses a 6.9 volt ‘subsurface’ zener diode in this role, a ...
Ultra Low Noise Power Supply Products
Ultra Low Noise Power Supply Products

Naim Discrete Regulator - English
Naim Discrete Regulator - English

... The simplified circuit topology of the Naim Discrete Regulator is shown in the block diagram of Figure 1. A regulator circuit of almost this form was first used in the NAP 500 power supply, since when the concept has been further refined by incorporating an enhanced voltage reference. This topology, ...
A Soft-Switching DC/DC Converter with High Voltage Gain
A Soft-Switching DC/DC Converter with High Voltage Gain

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Three-phase Voltage Relay

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Lab 4: Bipolar Junction Transistors (BJT)

... c. Once you’ve found the maximum load, go back to 100 and take the following data at several loads between 100 and your maximum load: IC, VCE, VB . Use one DMM with straight probes, not a BNC-grabber cable, for the latter two measurements—move your DMM probe from one transistor leg to the other. d ...
zvs-pwm full-bridge converter with reduced conduction losses
zvs-pwm full-bridge converter with reduced conduction losses

... The dc–dc zero-voltage-switched (ZVS) pulse-width modulated (PWM) fullbridge (FB) converter is widely used in industry for dc–dc power conversion. With ZVS operation, it is possible to operate the converter with high switching frequency using MOSFET so that its size can be reduced without generating ...
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DDS RF Signal Generator

... AM/FM demodulators. The instrument can even act as a source for very low frequencies starting at 50 Hz. While the combination of an ordinary multimeter and a rudimentary signal tracer is perfectly adequate for many ‘kitchen table’ hobbyists to get their homebrew circuits working, more sophisticated ...
ABB micro drives - ACS55, 0.25 to 3 hp/0.18 to 2.2 kW, Catalog
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... In treadmills the drive controls the speed of the motor powering the running belt. The drive offers high torque and accurate speed control throughout the treadmill’s speed range providing smooth acceleration and deceleration for the user. Audible noise is reduced through the drive switching at highe ...
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... 120 Volts line-to-neutral). Larger industrial systems utilize 480 Volts (277 Volts line-to-neutral). Very large industrial plants may use 4160 Volts (2400 Volts line-to-neutral) or even higher ranges. A high voltage system will transmit a given amount of power at a lower current than a lower voltage ...
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Galvanometers, Electromechanical Voltmeters, and

... waveform of the current. It is also the same power dissipated by a DC current flowing into the resistor with Idc = I. Similarly, the electric power dissipated into a resistor with resistance R when a periodic voltage with rms value V is applied to the resistor is V2/R, which is independent from the ...
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Power Electronic Devices For Railway Vehicles
Power Electronic Devices For Railway Vehicles

... converter may cause a voltage imbalance at the positive and negative sides of the filter capacitor with respect to the DC neutral point, and there is a risk that an excessive voltage may be applied to certain components. While focusing on the behavior of the potential voltage of the neutral point du ...
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... maintenance and testing must be performed by qualified personnel for proper operation in accordance with all of the latest National Fire Protection Association (NFPA), Underwriters' Laboratories (UL), Underwriters' Laboratories of Canada (ULC), National Electrical Code (NEC), Occupational Safety and ...
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... MAX1833 high-efficiency, step-up DC-DC converter for portable hand-held devices. The EV kit accepts a positive input voltage between 1.5V to VOUT and converts it to a 3.3V output for currents up to 150mA. The EV kit provides ultra-low quiescent current and high efficiency for maximum battery life. T ...
ZLDO485 • 4.85 VOLT ULTRA LOW DROPOUT REGULATOR
ZLDO485 • 4.85 VOLT ULTRA LOW DROPOUT REGULATOR

... currents, sometimes approaching as much as a tenth of their maximum load current specification when approaching dropout conditions. Despite its 300mA output rating, when enabled the ZLDO485 consumes typically only 630uA regulating normally and 3mA when the input falls too low for regulation. ...
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Series Circuits

A Test Oscillator For Ham Radio - Electrical and Information
A Test Oscillator For Ham Radio - Electrical and Information

... Before implementation, circuit simulation carried out in ADS2009 which is a very powerful tool to simulate high frequency circuits. In this section we are going to have a basic introduction to ADS simulations. Afterwards, the designed circuit will be simulated and tuned further to meet the specifica ...
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Islanding

Islanding refers to the condition in which a distributed generator (DG) continues to power a location even though electrical grid power from the electric utility is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, and it may prevent automatic re-connection of devices. For that reason, distributed generators must detect islanding and immediately stop producing power; this is referred to as anti-islanding.The common example of islanding is a grid supply line that has solar panels attached to it. In the case of a blackout, the solar panels will continue to deliver power as long as irradiance is sufficient. In this case, the supply line becomes an ""island"" with power surrounded by a ""sea"" of unpowered lines. For this reason, solar inverters that are designed to supply power to the grid are generally required to have some sort of automatic anti-islanding circuitry in them.In intentional islanding, the generator disconnects from the grid, and forces the distributed generator to power the local circuit. This is often used as a power backup system for buildings that normally sell their excess power to the grid.
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