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Embedded System Project Abstracts_ IEEE 2012 - Research on an Improved PWM Control Mode of DC Motor

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Embedded System Project Abstracts_ IEEE 2012 - Research on an Improved PWM Control Mode of DC Motor Powered By Docstoc
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      Embedded Systems Projects, IEEE 2012 Abstracts


RESEARCH ON AN IMPROVED PWM CONTROL MODE OF
                  DC MOTOR
In this paper, an improved pulse width modulation (PWM) mode of
Direct Current (DC) Motor is proposed to solve the weak points of
common control mode. The new mode designs an adjustable dead
time to improve reliability of the control system.
If the dead time is smaller, armature current is continuous; if the dead
time is larger, armature current is intermittent. When armature current
is continuous, the new mode not only has the advantages of bipolar
mode, but also prevents the same side MOSFETs from direct
connection.
When armature current is intermittent, motor has quicker response
than controlled by limited Single polarity mode. Theoretical analysis
and experimental research show that the new mode is practical and
feasible.




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     Embedded Systems Projects, IEEE 2012 Abstracts
Abstract of the Project


Proposed System Advantages


Architecture Diagram


                           Block Diagram


               Explanation of Block Diagram


                 Components usage Details



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        Embedded Systems Projects, IEEE 2012 Abstracts
EMBEDDED HARDWARE REQUIREMENTS
                              Microcontroller, Atmel 89c51 / 52
   Embedded Active components
                              Embedded Passive components
                               Electromechanical components
   Electrical components


SOFTWARE REQUIREMENTS
   Assembly Language
   Embedded C
   KEIL Compiler


HARDWARE REQUIREMENTS

                   If PC is used, for Independent Kits, this will not applicable

System        : Pentium Dual Core Processor + Board
                                  RAM                 : 1 GB
Hard Disk     : 80 GB
Monitor       : 17” Color Monitor
Mouse         : Logitech Mouse
Keyboard      : Multimedia Keyboard


SOFTWARE REQUIREMENTS

Operating System         :    Windows XP
Front End                :    Visual Basic / Java
Database                 :    Access


  NCCT, 109, 2 nd Floor, Bombay Flats, Nungambakkam High Road,
                 Nungambakkam, Chennai – 600034.
        Near Ganpat Hotel, Above IOB, Next to ICICI Bank

      Projects in Embedded Systems * Embedded
 Microcontrollers, VLSI * DSP * Matlab * Power Electronics *
                Java * .NET * Android * NS2
NCCT
                                                             www.ncct.in
                                                       ncctchennai@gmail.com
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        Embedded Systems Projects, IEEE 2012 Abstracts
ABOUT EMBEDDED SYSTEMS
An embedded system is a computer system designed for specific control functions within a
larger system, often with real-time computing constraints. It is embedded as part of a complete
device often including hardware and mechanical parts. By contrast, a general -purpose computer,
such as a personal computer (PC), is designed to be flexible and to meet a wide range of end -
user needs. Embedded systems control many devices in common use today
Embedded systems contain processing cores that are typically either microcon trollers or digital
signal processors. The key characteristic, however, is being dedicated to handle a particular
task. Since the embedded system is dedicated to specific tasks, design engineers can optimize
it to reduce the size and cost of the product an d increase the reliability and performance.
Embedded systems are designed to do some specific task, rather than be a general -purpose
computer for multiple tasks. Some also have real -time performance constraints that must be
met, for reasons such as safety and usability
Embedded systems are not always standalone devices. Many embedded systems consist of
small, computerized parts within a larger device that serves a more general purpose. The
program instructions written for embedded systems are referred to as firmware, and are stored
in read-only memory or Flash memory chips. They run with limited computer hardware
resources: little memory, small or non-existent keyboard or screen.




                                      PERIPHERALS
      Embedded Systems talk with the outside world via peripherals, suc h as:
   Serial Communication Interfaces (SCI): RS-232, RS-422, RS-485 etc.
   Synchronous Serial Communication Interface: I2C, SPI, SSC and ESSI (Enhanced
   Synchronous Serial Interface)
   Universal Serial Bus (USB)
   Multi Media Cards (SD Cards, Compact Flash etc.)
   Networks: Ethernet, LonWorks, etc.
   Fieldbuses: CAN-Bus, LIN-Bus, PROFIBUS, etc.
   Timers: PLL(s), Capture/Compare and Time Processing Units
   Discrete IO: aka General Purpose Input/Output (GPIO)
   Analog to Digital/Digital to Analog (ADC/DAC)
   Debugging: JTAG, ISP, ICSP, BDM Port, BITP, and DP9 ports.




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                 Nungambakkam, Chennai – 600034.
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      Projects in Embedded Systems * Embedded
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NCCT
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        Embedded Systems Projects, IEEE 2012 Abstracts
MICROCONTROLLERS
A microcontroller (sometimes abbreviated µC, uC or MCU) is a small computer on a single
integrated circuit containing a processor core, memory, and programmable input/output
peripherals. Program memory in the form of NOR flash or OTP ROM is also often included on
chip, as well as a typically small amount of RAM.
Microcontrollers are designed for embedded applications, in contrast to the microprocessors
used in personal computers or other general purpose applications.
Microcontrollers are used in automatically controlled products and devices, such as automobile
engine control systems, implantable medical devices, remote controls, office machines,
appliances, power tools, toys and other embedded syst ems. By reducing the size and cost
compared to a design that uses a separate microprocessor, memory, and input/output devices,
microcontrollers make it economical to digitally control even more devices and processes




ATMEL 89C51 MICROCONTROLLERS
The Atmel AT89 series is an Intel-8051-compatible family of 8 bit microcontrollers (µCs)
manufactured by the Atmel Corporation. Based on the Intel 8051 core, the AT89 series remains
very popular as general purpose microcontrollers, due to their industry standard in struction set,
and low unit cost. This allows a great amount of legacy code to be reused without modification in
new applications
The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4Kbytes of
Flash programmable and erasable read onl y memory (PEROM). The device is manufactured
using Atmel’s high-density nonvolatile memory technology and is compatible with the industry -
standard MCS-51 instruction set and pin out.
The on-chip Flash allows the program memory to be reprogrammed in -system or by a
conventional nonvolatile memory programmer. By combining a versatile 8 -bit CPU with Flash on
a monolithic chip, the Atmel AT89C51 is a powerful microcomputer, which provides a highly -
flexible and cost-effective applications solution to many embedded control




  NCCT, 109, 2 nd Floor, Bombay Flats, Nungambakkam High Road,
                 Nungambakkam, Chennai – 600034.
        Near Ganpat Hotel, Above IOB, Next to ICICI Bank

      Projects in Embedded Systems * Embedded
 Microcontrollers, VLSI * DSP * Matlab * Power Electronics *
                Java * .NET * Android * NS2

				
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