Masana'antu na Daga 'Yan Kima da Tushen Kula - Bâbba 1
Ko kowane da take da electrical engineering?
Electrical engineering yana nuna abubuwa mai ban sha'awa a fannin physics da tarihin masu gida. Wannan tarihi na iya haɗa da dalilin electromagnetism da kuma electricity a matsayin mutane. A.C. da D.C. suna da muhimmanci a electrical engineering. Amma D.C. Electric traction, current, transformers, da sauransu.
Me kawai da capacitor, resistor, da inductor?
Capacitor: Capacitor shine mafi girman electrical component wanda ya yi aiki a kan passive element da ke tsara ne suka shiga. Idan an saka potential, ya kula shiga electrical charge.
Resistor: Resistor shine electrical component wanda ya tsara suka shiga. Yana da biyu terminal da ake amfani da ita don haka suka shiga.
Inductor: Inductor shine electrical component wanda ya kula shiga energy a kan magnetic field da kuma ake amfani da ita don bincike electrical circuits. Ana kiran da ita a cikin harufin choke ko kuma coil.
Me kawai da capacitance da inductance?
Capacitance: Capacitance yana nufin adadin charge wanda ya kula shiga a kan capacitor da voltage na fix.
Inductance: Inductance yana nufin abubuwan coil da ke tsara suka shiga a kan electric current. Inductance da take amsa ta hanyar aikin primary coil da secondary coil.
Me kawai da generator da alternator?
Generator da alternator suna yi aiki a kan tarihi mai kimi, wadanda suna haɗa mechanical energy zuwa electrical energy.
Generator: Yana haɗa induced emf (Electro Motive Force) zuwa direct current tare da stationary magnetic field da revolving conductor wanda ya yi rolling on the armatures with slip rings and brushes riding against each other.
Alternator: Yana da spinning magnetic da stationary armature don high voltage da kuma rotating armature don low voltage, da kuma stationary magnetic field.
Me kana da motor principle?
Electric motor yana yi aiki a kan takaitaccen conductor da ke shiga current da kuma ya kula shiga magnetic field. Rotatory movements ana samu idan ake shiga conductor perpendicular to a magnetic field (known as torque).
Me kana da electric traction?
Electric traction yana nufin amfani da electric power a kan traction system (i.e., for railways, trams, trolleys etc).
Electric traction yana nufin amfani da electricity don duka wannan tushen. Magnetic traction yana da amfani a kan bullet trains, amma electric traction systems suna da amfani da dc motors.
Me kana da RLC circuit?
RLC circuit shine electrical circuit wanda ya da resistor (R), inductor (L), da kuma capacitor (C) wadanda suka yi link a kan parallel ko series. Second order circuit shine wanda duk voltage ko current a kan circuit zai iya tabbatar da second order differential equation.
Me kana da MARX CIRCUIT?
An amfani da ita da generators don charge da discharge a number of capacitors a kan parallel. An amfani da ita idan voltage da take don testing yana da kyau da available voltage.
Me kana da benefits of thyristor-based speed control?
Faster switching than MOSFET, BJT, and IGBT
Low price
More precise.
Me kana da armature reaction?
Armature reaction shine reaction of armature flux to main flux. Armature flux zai iya assist ko oppose main flux.
Me kana da ACSR cable da kuma amfani da ita?
ACSR stands for Aluminium Conductor Steel Reinforced, and it is utilised in transmission and distribution.
Me kana da automatic voltage regulator (AVR)?
AVR shine Automatic Voltage Regulator. It is an important component in Synchronous Generators since it manages the generator’s output voltage by adjusting its excitation current. As a result, it can control the Generator’s output Reactive Power.
Me kana da stepper motor? Me kana da applications?
Stepper motor shine electrical mechanism wanda ya ji aiki a kan input pulse. It is a sort of synchronous motor that works in steps in either direction rather than in a whole cycle, and it is utilised in automation parts.
Me kawai da earth da neutral?
Neutral shine return current path for equipment, while earthing shine human protection. Earth shine neutral support. Idan neutral ba ce, machine zai enter full phase and we will receive a shock. Don haka, earthing ana amfani don haka.
Me kana da Form Factor?
The ratio of the RMS (Root Mean Square) value to the average value is the form factor of an alternating current waveform (signal) (mathematical mean of absolute values of all points on the waveform)
Me kana da slip?
Slip shine kawo da difference between the synchronous speed Ns and the actual speed N of the rotor.
Me kana da dummy coils?
These are utilised with wave winding and are employed when the standard armature punching does not meet the requirements of the windings. They simply provide mechanical balance for the armature because an armature with some slots but no windings would be mechanically out of balance.
Me kana da Voltage Regulation?
It is the voltage shift caused by reducing the load from its rated value to zero, represented as a percentage of the rated load voltage.
Me kana da applications of interpoles?
Because the polarity of the interpoles is the same as that of the main pole ahead, they create an emf in the coil (due to commutation), which aids in current reversal. Another role is to counteract the armature reaction’s cross magnetising effect.
Me kana da two-phase motor?
A two-phase motor is one that features a phase split between the starting and running windings. Example: AC servo motor with a 90-degree phase separation between the auxiliary and control windings.
Why are synchronous generators used to generate electricity?
Synchronous machines can work on different power factors (or different imaginary powers) by altering the field EMF, and are thus utilised to generate electricity.
What exactly is an Automatic Voltage Regulator (AVR)?
The term AVR stands for Automatic Voltage Regulator. It is a key component in Synchronous Generators; it controls the generator’s output voltage by adjusting its excitation current. As a result, it can regulate the Generator’s reactive power output.
What exactly is Eddy Current Loss?
The rate of change in an induced magnetic field causes this phenomenon. The relative motion generates a circulating flow of electrons or current within the conductor, resulting in a loss of efficiency.
What exactly is a ground line?
The ground line’s function is to provide a continuous, uninterrupted channel for a circuit fault current to return to the distribution panel and trip the circuit’s over current device.
How does one increase the number of parallel routes in an armature?
One can increase the parallel paths in an armature by increasing the number of magnetic poles.
In a DC generator, how are the brushes connected?
Typically, all positive brushes are linked together, and all negative brushes are linked together.
How is field distortion corrected?
Using compensatory windings inserted in the pole-shoe holes and coupled in series with the armature
What causes the brushes to spark?
It is caused by the self-induction of the commutating coil.
What is the standard rotational direction of DC generators?
When viewed from the other end to the driving end, clockwise
What is meant by a generator’s voltage buildup?
It refers to the steady increase in generator voltage to its maximum value once the generator is started from a standstill.
How do you start a generator?
It is normally brought up to speed with the assistance of a driving engine known as a prime mover.
What is the distinction between synchronous and asynchronous generators?
Synchronous generators provide both active and reactive power, whereas asynchronous generators (induction generators) provide only active power while observing reactive power for magnetising. This form of generator is utilised in windmills.
Define Ohm’s law?
Ohm’s law defines a relationship between the three essential concepts of voltage, current & resistance. It states that the electric current in a circuit is directly proportional to voltage and to the resistance it is inversely proportional.
What is the primary usage of a transistor in an electric circuit?
Transistors are primarily used to amplify current so that the output power exceeds the input power.
What if the series current doubles?
When the series current doubles, the resistance is half.
Explain what a series of resistors will do.
When a sequence of resistors is connected in series, the source voltage is divided in proportion to their values.
