What is difference between ac and dc power

what is difference between ac and dc power

What's the Difference Between AC & DC Power?

Difference between AC and DC Alternating Current (AC) Alternating current is defined as the flow of charge that changes direction periodically. The result obtained will be, the voltage level also reverses along with the current. Difference Between AC (Alternating Current) & DC (Direct Current) The Alternating Current (AC) and Direct Current (DC) are the two types of electric currents that coexists in our daily medattr.com are both used for supplying power to the electrical devices. But they are very different.

When the electricity was invented many changes have taken place over the years. The dark planet turned into a planet of lights. In fact, it made life so simple how to detect listening devices bugs all circumstances. All the devices, industries, offices, houses, technology, computers run on electricity.

Here energy will be in two forms, i. Regarding these currents and the difference between AC and DC will be discussed in detail, its basic function and uses of it.

Its properties are also discussed in a tabular column. The flow of electricity can be done in two ways like AC alternating current and DC direct current.

Electricity can be defined as the flow of electrons throughout a conductor such as a wire. The difference between AC and DC what is difference between ac and dc power includes the following.

Alternating current is defined as the flow of charge that changes direction periodically. The result obtained will be, the voltage level also reverses along with the current. Basically, AC is used to deliver power to industries, houses, office buildings, etc. AC is produced by using called an alternator. It is designed to produce alternating current. Inside of a magnetic field, a loop of wire is spun, from which induced current will flow along the wire.

Here the rotation of the wire may come from any no of means i. This is because the wire spins and enters into different magnetic polarity periodically, the current and voltage alternate in the wire. From this, the generated current can be of many waveforms like sine, square, and triangle.

But in most cases, the sine wave is preferred because it is easy to generate and calculations can be done with ease. However, the rest of the wave requires an additional device to convert them into respective waveforms or the shape of the equipment has to be changed and the calculations will be too difficult.

The description of the Sine waveform is discussed below. Generally, the AC waveform can be understood easily with the help of mathematical what is difference between ac and dc power. For this sine wave, the three things which are required are amplitude, phase, and frequency.

By looking at just voltage, a sine wave can be described like the below mathematical function:. V t : It is a function of time a voltage. This means what is difference between ac and dc power as time changes our voltage also changes. In the above equation, the term which is right of the equal sign describes how the voltage changes over time.

VP: It is the amplitude. This states how maximum the voltage the sine wave could reach in either direction, i. The function of sin states that the voltage will be in the form of a periodic sine wave and will act as a smooth oscillation at 0V.

It converts the frequency from cycles in hertz to angular frequency in radians per second. Here f describes the sine wave frequency.

This will be in the form of units per second or hertz. The frequency tells how many times a particular waveform occurs within one second. Here t is a dependent variable. It is measured in seconds. When the time varies the waveform also varies.

The phase is defined as how the waveform is shifted with respect to time. It is measured in degrees. For the above formula, the real-time application values are added by taking the United States as a reference. Root mean square RMS is another small concept which helps how to firm up your legs calculating the electrical power.

Direct current DC is the movement of electric charge carriers, i. In DC the intensity of the current will vary along with time, but the direction of movement stays the same all time. Here DC is referred to as a voltage whose polarity never reverses. In a DC circuit, electrons emerge from the minus or negative pole and move towards the plus or positive pole. Some of the physicists define DC as it travels from plus to minus. Generally, the basic source of direct current is produced by batteries, electrochemical, and photovoltaic cells.

But AC what is difference between ac and dc power most preferred across the world. In this scenario, AC can be converted to DC. This will happen in multiple steps. Initially, the power supply consists of a transformer, which later converted into DC with the help of a rectifier. It prevents the flow of current from reversing and a filter is used to eliminate current pulsations in the output of the rectifier. The is the phenomenon of how AC is converted into DC.

However, what time was jesus christ born all electronic and computer hardware to function they need DC.

Most of the solid-state equipment requires a voltage range between 1. Current demands vary accordingly with the devices which are used. For example the range from practically zero for an electronic wristwatch, to more than amperes for a radio communications power amplifier. Equipment using, a high-power radio or broadcast transmitter or television or a CRT cathode-ray tube display or vacuum tubes requires from about volts to several thousand volts DC.

The main difference between AC and DC is discussing in the following comparison chart. The main reasons to select AC voltage over DC voltage mainly include the following. The loss of energy while transmitting the AC voltage is low as compared with the DC voltage.

Whenever the transformer is at some distance then the installation is very simple. AC generators slowly changed the DC battery system of Edison as AC is very secured to transmit power over long distances to generate more power. The scientist namely Nikola Tesla has used a rotary magnet in place of applying the magnetism through the wire gradually. Once the magnet was leaned in a single direction, then electrons will flow in the direction of the positive, however whenever the direction of the magnet was turned, then the electrons will also be turned.

AC is used in distributing power and it includes many advantages. At a high voltage, whenever the power is transmitted then there will be less loss. Direct current is used in batteries, some electronic and electrical devices, and solar panels.

The current supply used in our homes is AC because as we can alter alternate current very simply using the transformer. Once the voltage increases then the current will be less. Like this, we can transmit equal power by decreasing the loss of power because high voltage provides the most excellent performance. So because of this reason, AC is used in homes in place of DC.

The transmission of high voltage can also be done through DC, however, it is not easy to decrease the voltage for securely utilize at homes. At present, advanced DC converters are utilized to decrease the DC voltage. I hope that every point is understood clearly about the alternating current, direct current, waveforms, the equation, differences of AC and DC in tabular columns along with their properties.

Still unable to understand any of the topics in the articles or to implement the latest electrical projectsfeel free to raise a question in the comment box below. Here is a question for you, what is the power factor of an alternating current? Hi DP Kodun Generally the basic source of direct current is produced by batteries, electrochemical, and photovoltaic cells. Hi Amrut Bio batteries can be used as a charger for electronic devices like cell phones, tabs, power banks,etc.

This is the great post I have read till yet abou the Difference Between AC and DC Currents because this post has very what i ate today anorexic, attractive and effective knowledge. Thank you for the what is a cag in the navy post.

Good work thanks for the information. I have lot of learning to read the above passage. Share This Post: Facebook. It is really useful.

I got the exact answer i wanted. Thank u for the service. Dear team, Good work thanks for the information. Thanks, M. Practically the voltage of DC cannot travel very far until it begins to lose energy. The frequency of alternating current will be either 50Hz or 60Hz depending upon the country.

DC Power and Environmental Issues

Power Factor: The power factor of alternating current lies between 0 to 1 while power factor of DC is 1. Ease of transmission: The AC power can be transferred easily and efficiently as compared to DC power. Voltage level: The DC voltage is low-level voltage while the AC voltage is high in magnitude. DC The consistent and constant voltage of DC power supplies electronics that use a battery, such as your mobile device or smartphone. Like the battery powering your kid’s remote control car, the smooth, steady electrical current of DC power always flows in the same direction, between positive and negative terminals. AC/DC. Typically, engineers can choose between direct-current (DC) or alternating-current (AC) motors. Machine Design has covered the difference between basic types of motors in the past.

A drive is an electrical or electronic device used to control the speed and motion of electrical machines such as motors and robots etc. The device used for motor speed control is known is an electrical drive. They are constant and variable speed controller and widely used in industrial automation. Following is the basic electrical drive diagram. There are mainly two basic types of electric drives as follow:. AC drive alternating current drive converts the AC supply to the DC using converter circuits based on rectifier and invert it back to the AC from DC using inverter to control the speed of electric motors especially three phase motors.

The different types of AC drives operate on the same principle i. Below is the basic block diagram of AC drive. A DC drive direct current drive is a DC motor speed control system which convert the input AC supply to the DC using converter circuit based on rectifier diodes and thyristors to control the speed of DC motors. Nowadays, thyristors are used to convert the AC to the DC while mercury arc rectifier and thyristor converters are also used for the same purpose.

There are additional two types of DC drives viz:. Below is the comparison chart showing some differences between AC and DC drives. Advantages of AC Drives:. Related Posts:. Simple one squirrel cage motor is able just according installed bearings abilities. Usually up to 4,5k rpm. Also there issue about lose of torque, because main supply standard is VAC three phase and for increase the speed need higher speed in proportions of increase frequency.

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We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. AC Drives. DC Drives. AC Drives run by AC power supply i. DC Drives run by DC power supply i. Batteries and supplies sources of DC voltages. The circuit design of DC drives is less complex due to the single power conversion i.

It converts AC to DC only once. Power and Control Circuits. AC drives power and control circuits are complex in design as compared to the DC drives.

DC drives power and control circuits are simple in design as compared to the AC drives. The breaking and acceleration mechanism of AC drives can be controlled by changing the supply frequency F S. The breaking mechanism of DC drives can be control by applying resistance at rotor side. Speed control is done by changing the supply frequency. Speed control is done by armature and field control. Maximum speed can be achieved. The speed is limited because of commutator used in the motors for commutation.

It is complex to adjust the speed torque curves. It can be achieved easily. AC drives have both inverter and converter. DC drives have converter and chopper circuits. Commutator and Slip Rings. No need of commutation but slip rings in AC drives.

No slip rings but Commutation is needed in DC drives. No need of rectification circuit. Rectifier circuit is must. DC drives can be connected and run directly through batteries providing DC voltage. AC drives can be directly connected to the transformer mains supply. In DC drives, transformer is needed at voltage higher than V. AC drives consume less power as compared to DC drives. DC drives consume more power as compared to AC drives. High about 10k hours. Low about 3k hours. Operation of AC drives is noisy.

Operation of DC drives is less noisy. Inverter used in AC drives produces harmonics on both side i. AC drives are spark free and can be used in wet environment. AC drives are more expensive while the motors used in AC drives are less expensive e. DC drives are less expensive while the motors used in DC drives are little bit expensive. AC drives used in almost all areas with vast applications.

DC drives are used in few areas as compared to AC drives. Generally, AC drives used for AC motors. They are used to control the speed of AC motors. Normally, DC drives used for DC motors. They are used to control the speed of DC motors.



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