Home » Thesis » Variable frequency transformer thesis writing

Variable frequency transformer thesis writing

Variable frequency transformer thesis writing for MOSFET, Shut

Our Guarantees Our Quality Standards Our Fair Use Policy

Why Is United kingdom Essays Different?

  • There exists a verifiable buying and selling history like a United kingdom registered company (details at the end of each and every page).
  • Our Nottingham offices are available to the general public where one can meet we well over 40 full-time staff.
  • United kingdom Essays partner with Feefo.com to write verified customer testimonials – both negative and positive!

Ask a specialist FREE

Ask a specialist Index Ask an issue Compensated Services

About Our Ask a specialist Service

Our free of charge “Ask a specialistInch Service enables users to obtain an answer as high as 300 words to the academic question.

  • Questions typically clarified within 24 hrs.
  • All solutions are researched and compiled by properly accredited academics within the question’s area of interest.
  • Our services are completely private, only the reply is printed – we never publish your individual details.
  • Each professional answer includes appropriate references.

About Us

Much More About Us

Printed: 23, March 2015

Microcontroller Based Variable Current Variable Frequency Inverter Abstract- The current power scenario is damaged by frequent power cuts, load shedding and occasional current supplies. But power dependence in industries and growing utilization of electrical and electronics appliances in homes make uninterrupted power an up to date necessity.It has inflated the need for inverters both in industries and households. The rise in demand from customers has also known as for additional power efficient and portable designs. Major slice of the necessity is met using storage batteries and Electricity to AC Inverters.

According to present scenario large heavy bulky Electricity motors are now being substituted with Induction motors in greater figures throughout a multitude of industrial and commercial applications since it is easy to maintain, less bulky,reliable,cheaper device to transform the electrical power into mechanical motion.
Variable frequency transformer thesis writing power efficient designs

In certain applications, it’s preferred to manage the rate from the induction motor. To do this a flexible frequency and variable Current Inverter is the necessity of future.

Using micro controller offers the variable frequency pulse width modulation (PWM) signal which provides the variable frequency and variable output current too.Utilization of PWM cuts down on the harmonic contents within the output and increases the efficiency from the Inverter.

Professional

Get the grade
or a refund
using our Essay Writing Service!

Essay Writing Service

Key phrases- High Frequency, Inverter, Microcontroller, SMPS, and UPS.

The current power scenario is damaged by frequent power cuts, load shedding and occasional current supplies. But power dependence in industries and growing utilization of electrical and electronics appliances in homes make uninterrupted power an up to date necessity. It has inflated the need for inverters both in industries and households. The rise in demand from customers has also known as for additional power efficient and portable designs. Major slice of the necessity is met using storage batteries and Electricity to AC Inverters. Presently 220V/ 50Hz power generation is met using transformer of metals metal alloys with natural loss factor of ten percent.

Variable frequency transformer thesis writing use of electrical and

However are heavy in weight, bulky in volume.

To beat these problems utilization of high frequency ferrite core transformers provides fat loss by one fifth of conventional inverters, 1 / 3 of volumetric reduction together with 25 to 35% cost and also the 10% improvement in efficiency. Less expensive of ferrites and development of ferrite technology can result in further decrease in cost and much more power efficient designs.

Growing dependence of homes on inverters requires cheaper, lightweight, efficient and portable designs. Switching power supplies tend to be more power efficient. Inverters using switching power supplies have been in great demand because they are smaller sized, more power efficient and occasional cost.

The inverter design, coded in the work, uses switching technology hence meets all of the above needs necessary for consumers.

The block schematic from the suggested plan is proven in Fig.1. The different blocks of Fig.1are described below.

Fig. 1. Block diagram of Microcontroller Based High Frequency Inverter

Lead Acidity Battery

Supplies d.c current from 10.5 to 13.6 volts towards the push pull ripper tools.

Push Pull ripper tools

Steps in the electricity current received around the primary side with a ratio of 31:1. The output acquired is really a square wave with average value = 262V.

Duty cycle of PWM signal provided to input switches of ripper tools is varied from 64% to 84% to keep a typical worth of 262V around the secondary of push pull transformer.

Auxiliary windings around the secondary side have 3 turns. Average worth of 13V is acquired around the Creation of the auxiliary winding. This auxiliary current provides electricity current needed through the three optocouplers (LM 817) within the circuit.

Full Bridge Rectifier and Filter

Removes our prime current spikes contained in the creation of push pull ripper tools. The output acquired is square wave with folded ends with average worth of 260V.

Full Bridge ripper tools

Receives input in the full bridge rectifier and filter. The switching frequency is 50 Hz having a duty cycle of 85%. The output is square wave with folded ends in a frequency of 50Hz and average value 220V.

Optocoupler

Three optocouplers (PC 817) are utilized within the circuit. One optocoupler can be used within the feedback circuit towards the microcontroller it isolates the microcontroller in the analog current being given away from the creation of full bridge rectifier and filter. Other two optocouplers are utilized to isolate the transistors utilized in the drive circuitry of full bridge ripper tools switches in the fast rising signals caused by the Schmitt trigger.

Schmitt Trigger

Comprehensive

Plagiarism-free
Always promptly
Marked to plain

Signals from pin figures 18, 19, 14 and 15 of microcontroller are given into it. It lessens the go up and down duration of the signals acquired from microcontroller to some couple of nanoseconds (50ns to 990ns).

The detailed circuit diagram of block schematic proven in Fig.1 is presented in Fig.2. The different circuits utilized in the suggested plan include control circuit for miccontroller, power inverter configuration isolator circuit, output stage etc.

It receives battery current input on pin no 23 following the current is walked lower through the current divider and preset. The preset is placed so that battery power current of 10.5V is walked lower to 2V.When the battery current goes below 2V then your microcontroller stops giving PWM signal towards the push pull ripper tools. Microcontroller receives over and under current feedback on pin no 24.A.C current creation of push pull ripper tools is transformed into d.c using full bridge rectifier and filter. This high current output (317Vpk to 410Vpk) is transformed into electricity by having an average worth of 260V.It’s walked lower using current divider and preset so that 310V is walked lower to at least one.5V and 409V walked lower to at least one.96V.The current feedback is walked lower and varied linearly from 1.5V to at least one.96V.With respect to the feedback received microcontroller varies the job cycle of PWM signal provided to mosfet switches from the push pull ripper tools. This duty cycle is varied from 64% to 84%. Pin nos 18 and 19 give pwm signal in a frequency of 50Khz.The job cycle of the signal differs from 64% to 84% with respect to the feedback received on pin no 24(as described above).When the feedback signal on pin no 24 is away from the specified boundary (1.5V to at least one.96V) then your PWM signal from pin no 18 and 19 to push pull switches is stopped (i.e. duty cycle made %).

PWM signals from pin no 18 and 19 possess a delay of 10­s together. Flag 25 receives feedback from the current transformer connected in the creation of the secondary from the push pull ripper tools transformer. The output of the present transformer is walked lower utilizing a preset. This walked lower current is feedback towards the microcontroller pin no 25.Preset is really adjusted that 2V matches full load current. For feedback greater than 2V PWM signal provided to the push pull switch is stopped (i.e. duty cycle=).

Pin figures 14 and 15 give Signal of frequency = 50Hz.The job of the signal is 85%.This signal is offered towards the mosfet switches of full bridge ripper tools. The signals from pin no 14 and 15 possess a time delay of 10ms.

Fig. 2. Flow chart for generating switching signals

The flow chart for developing the control plan is proven is self explanatory flow chart. The microcontroller generates the triggering signal for MOSFET, Shut lower, over current, battery current sensing. The flow chart is changed into set up language of microcontroller.

testing AND results

Signals from pin figures 18, 19, 14 and 15 of microcontroller are given into it. It lessens the go up and down duration of the signals acquired from microcontroller to some couple of nanoseconds (50 ns to 990ns.) The hardware from the suggested plan is developed and integrated with software control through microcontroller. The testing from the prototype is carried out in laboratory test bench. The machine is started up by press button turn on no load. The output current of 220 V a.c. can be obtained and it is recorded via a digital voltmeter. The machine is turned off. A resistive load is connected.

Like a pilot project we’ve created a 12V d.c. to 220V/50Hz, 250W system. We’ve added protection features like short circuit, over current, under current and battery drain protection. The security circuitry is implemented utilizing a micro controller ATmega8. Using micro controller for supplying protection helps make the protection circuit smaller sized and corrective measures sharper fot it supplied by an analog circuit. The circuit is tested for 250 watt load and also the result was acceptable. The micro controller offers the switching charge of the converters. This eliminates the requirement for additional analog control circuitry. It uses step-up conversion topology and 50 KHz operating frequency, which further cuts down on the system size.

This Essay is

Our Guarantees Our Quality Standards Our Fair Use Policy

Why Is United kingdom Essays Different?

  • There exists a verifiable buying and selling history like a United kingdom registered company (details at the end of each and every page).
  • Our Nottingham offices are available to the general public where one can meet we well over 40 full-time staff.
  • United kingdom Essays partner with Feefo.com to write verified customer testimonials – both negative and positive!

Ask a specialist FREE

Ask a specialist Index Ask an issue Compensated Services

About Our Ask a specialist Service

Our free of charge “Ask a specialistInch Service enables users to obtain an answer as high as 300 words to the academic question.

  • Questions typically clarified within 24 hrs.
  • All solutions are researched and compiled by properly accredited academics within the question’s area of interest.
  • Our services are completely private, only the reply is printed – we never publish your individual details.
  • Each professional answer includes appropriate references.

About Us

Much More About Us

Printed: 23, March 2015

Microcontroller Based Variable Current Variable Frequency Inverter Abstract- The current power scenario is damaged by frequent power cuts, load shedding and occasional current supplies. But power dependence in industries and growing utilization of electrical and electronics appliances in homes make uninterrupted power an up to date necessity.It has inflated the need for inverters both in industries and households. The rise in demand from customers has also known as for additional power efficient and portable designs. Major slice of the necessity is met using storage batteries and Electricity to AC Inverters.

According to present scenario large heavy bulky Electricity motors are now being substituted with Induction motors in greater figures throughout a multitude of industrial and commercial applications since it is easy to maintain, less bulky,reliable,cheaper device to transform the electrical power into mechanical motion. In certain applications, it’s preferred to manage the rate from the induction motor. To do this a flexible frequency and variable Current Inverter is the necessity of future.

Using micro controller offers the variable frequency pulse width modulation (PWM) signal which provides the variable frequency and variable output current too.Utilization of PWM cuts down on the harmonic contents within the output and increases the efficiency from the Inverter.

Professional

Get the grade
or a refund
using our Essay Writing Service!

Essay Writing Service

Key phrases- High Frequency, Inverter, Microcontroller, SMPS, and UPS.

The current power scenario is damaged by frequent power cuts, load shedding and occasional current supplies. But power dependence in industries and growing utilization of electrical and electronics appliances in homes make uninterrupted power an up to date necessity. It has inflated the need for inverters both in industries and households. The rise in demand from customers has also known as for additional power efficient and portable designs. Major slice of the necessity is met using storage batteries and Electricity to AC Inverters. Presently 220V/ 50Hz power generation is met using transformer of metals metal alloys with natural loss factor of ten percent. However are heavy in weight, bulky in volume.

To beat these problems utilization of high frequency ferrite core transformers provides fat loss by one fifth of conventional inverters, 1 / 3 of volumetric reduction together with 25 to 35% cost and also the 10% improvement in efficiency. Less expensive of ferrites and development of ferrite technology can result in further decrease in cost and much more power efficient designs.

Growing dependence of homes on inverters requires cheaper, lightweight, efficient and portable designs. Switching power supplies tend to be more power efficient. Inverters using switching power supplies have been in great demand because they are smaller sized, more power efficient and occasional cost.

The inverter design, coded in the work, uses switching technology hence meets all of the above needs necessary for consumers.

The block schematic from the suggested plan is proven in Fig.1. The different blocks of Fig.1are described below.

Fig. 1. Block diagram of Microcontroller Based High Frequency Inverter

Lead Acidity Battery

Supplies d.c current from 10.5 to 13.6 volts towards the push pull ripper tools.

Push Pull ripper tools

Steps in the electricity current received around the primary side with a ratio of 31:1. The output acquired is really a square wave with average value = 262V.

Duty cycle of PWM signal provided to input switches of ripper tools is varied from 64% to 84% to keep a typical worth of 262V around the secondary of push pull transformer.

Auxiliary windings around the secondary side have 3 turns. Average worth of 13V is acquired around the Creation of the auxiliary winding. This auxiliary current provides electricity current needed through the three optocouplers (LM 817) within the circuit.

Full Bridge Rectifier and Filter

Removes our prime current spikes contained in the creation of push pull ripper tools. The output acquired is square wave with folded ends with average worth of 260V.

Full Bridge ripper tools

Receives input in the full bridge rectifier and filter. The switching frequency is 50 Hz having a duty cycle of 85%. The output is square wave with folded ends in a frequency of 50Hz and average value 220V.

Optocoupler

Three optocouplers (PC 817) are utilized within the circuit. One optocoupler can be used within the feedback circuit towards the microcontroller it isolates the microcontroller in the analog current being given away from the creation of full bridge rectifier and filter. Other two optocouplers are utilized to isolate the transistors utilized in the drive circuitry of full bridge ripper tools switches in the fast rising signals caused by the Schmitt trigger.

Schmitt Trigger

Comprehensive

Plagiarism-free
Always promptly
Marked to plain

Signals from pin figures 18, 19, 14 and 15 of microcontroller are given into it. It lessens the go up and down duration of the signals acquired from microcontroller to some couple of nanoseconds (50ns to 990ns).

The detailed circuit diagram of block schematic proven in Fig.1 is presented in Fig.2. The different circuits utilized in the suggested plan include control circuit for miccontroller, power inverter configuration isolator circuit, output stage etc.

It receives battery current input on pin no 23 following the current is walked lower through the current divider and preset. The preset is placed so that battery power current of 10.5V is walked lower to 2V.When the battery current goes below 2V then your microcontroller stops giving PWM signal towards the push pull ripper tools. Microcontroller receives over and under current feedback on pin no 24.A.C current creation of push pull ripper tools is transformed into d.c using full bridge rectifier and filter. This high current output (317Vpk to 410Vpk) is transformed into electricity by having an average worth of 260V.It’s walked lower using current divider and preset so that 310V is walked lower to at least one.5V and 409V walked lower to at least one.96V.The current feedback is walked lower and varied linearly from 1.5V to at least one.96V.With respect to the feedback received microcontroller varies the job cycle of PWM signal provided to mosfet switches from the push pull ripper tools. This duty cycle is varied from 64% to 84%. Pin nos 18 and 19 give pwm signal in a frequency of 50Khz.The job cycle of the signal differs from 64% to 84% with respect to the feedback received on pin no 24(as described above).When the feedback signal on pin no 24 is away from the specified boundary (1.5V to at least one.96V) then your PWM signal from pin no 18 and 19 to push pull switches is stopped (i.e. duty cycle made %).

PWM signals from pin no 18 and 19 possess a delay of 10­s together. Flag 25 receives feedback from the current transformer connected in the creation of the secondary from the push pull ripper tools transformer. The output of the present transformer is walked lower utilizing a preset. This walked lower current is feedback towards the microcontroller pin no 25.Preset is really adjusted that 2V matches full load current. For feedback greater than 2V PWM signal provided to the push pull switch is stopped (i.e. duty cycle=).

Pin figures 14 and 15 give Signal of frequency = 50Hz.The job of the signal is 85%.This signal is offered towards the mosfet switches of full bridge ripper tools. The signals from pin no 14 and 15 possess a time delay of 10ms.

Fig. 2. Flow chart for generating switching signals

The flow chart for developing the control plan is proven is self explanatory flow chart. The microcontroller generates the triggering signal for MOSFET, Shut lower, over current, battery current sensing. The flow chart is changed into set up language of microcontroller.

testing AND results

Signals from pin figures 18, 19, 14 and 15 of microcontroller are given into it. It lessens the go up and down duration of the signals acquired from microcontroller to some couple of nanoseconds (50 ns to 990ns.) The hardware from the suggested plan is developed and integrated with software control through microcontroller. The testing from the prototype is carried out in laboratory test bench. The machine is started up by press button turn on no load. The output current of 220 V a.c. can be obtained and it is recorded via a digital voltmeter. The machine is turned off. A resistive load is connected.

Like a pilot project we’ve created a 12V d.c. to 220V/50Hz, 250W system. We’ve added protection features like short circuit, over current, under current and battery drain protection. The security circuitry is implemented utilizing a micro controller ATmega8. Using micro controller for supplying protection helps make the protection circuit smaller sized and corrective measures sharper fot it supplied by an analog circuit. The circuit is tested for 250 watt load and also the result was acceptable. The micro controller offers the switching charge of the converters. This eliminates the requirement for additional analog control circuitry. It uses step-up conversion topology and 50 KHz operating frequency, which further cuts down on the system size.

This Essay is


Share this:
custom writing low cost
Order custom writing

ads