Table of Contents
- 1 How is AC sine wave generated?
- 2 Which part of the DC generator converts the AC sine wave produced by the generator to DC?
- 3 What is an AC sine wave?
- 4 Which AC waveform is produced by all rotating machines?
- 5 What is AC DC generator?
- 6 What is the sine wave output of a generator?
- 7 How many cycles does an AC generator produce per revolution?
How is AC sine wave generated?
An AC generator uses the principal of Faraday’s electromagnetic induction to convert a mechanical energy such as rotation, into electrical energy, a Sinusoidal Waveform. A simple generator consists of a pair of permanent magnets producing a fixed magnetic field between a north and a south pole.
How an alternating voltage waveform is generated in a DC armature?
Alternating current is produced as the magnetic field of the armature passes the coils. This produces a magnetic field around the armature coil. Since this magnetic field is produced by DC it is a steady unchanging field like a permanent magnet. The armature rotates, rotating the magnetic field with it.
Which part of the DC generator converts the AC sine wave produced by the generator to DC?
Commutator
Commutator and Brushes All generators produce a sine wave, or AC currents when the rotor turns in the magnetic field. The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction.
How AC is produced by a generator?
As one side of the coil moves up through the magnetic field , a current is induced in one direction. As the rotation continues and that side of the coil moves down, the induced current reverses direction. This means that the generator produces a current that is constantly changing. This is alternating current or a.c.
What is an AC sine wave?
The waveform of an alternating current power circuit is a sine wave. When a vector points upward along the y-axis, the voltage or current has reached its positive maximum value, and when it points downward along the same axis, the negative maximum has been reached. The horizontal x-axis indicates a value of zero.
Why is AC current a sine wave?
Originally Answered: Why is AC supply always represented by a sine wave? The amplitude in AC oscillates between two limits. The behavour can be represented nicely by sine and cosine functions because they also bounce back and forth between two limits. This representation helps in the analysis of alternating current.
Which AC waveform is produced by all rotating machines?
16 Cards in this Set
What is the most common type of AC waveform? | Sine waves are produced by all rotating machines. |
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How many degrees are there in one complete sine wave? | There are 360 degrees in one complete sine wave. |
What is the component of a DC generator that converts the armature AC into DC?
COMMUTATOR
THE COMMUTATOR IS USED TO CONVERT THE A.C. VOLTAGE PRODUCED IN THE ARMATURE TO D.C. VOLTS.
What is AC DC generator?
AC generator is a mechanical device that converts mechanical energy into AC electrical power. DC generator is a mechanical device that converts mechanical energy into DC electrical power. 2. Direction of Current. In an AC generator, the electrical current reverses direction periodically.
Is a sine wave AC or DC?
Sine waves are by far one of the most important types of AC waveform used in electrical engineering. The shape obtained by plotting the instantaneous ordinate values of either voltage or current against time is called an AC Waveform.
What is the sine wave output of a generator?
Conclusion. The sine wave output is the result of one side of the generator loop cutting lines of force. In the first half turn of rotation this produces a positive current and in the second half of rotation produces a negative current. This completes one cycle of AC generation.
How is voltage generated in a generator?
Generation of Voltage. For each revolution a complete sine wave is generated. The number of sine wave cycles generated per second (the frequency) depends on how quickly the generator is rotating. In practice each generator coil will have several turns of wire. For ‘n’ turns, the total voltage will be ‘n’ times that given by the above equation.
How many cycles does an AC generator produce per revolution?
An AC generator produces one cycle per revolution for each pair of poles. R1 One Revolution 48 Voltage and Current Peak Value The sine wave illustrates how voltage and current in an AC circuit rises and falls with time.
What is the relationship between voltage and sine?
At any other angle the voltage will be proportional to the sine of the angle. In practice voltage is generated by rotating a coil of wire through a magnetic field in a generator. The illustration shows this process. Initially the coil is perpendicular to the magnetic field generating maximum voltage.