AC PWM BASED POWER Control BY IGBT / MOSFET SUBMITTED BY
ABSTRACT This project attempts a new speed control technique for the single-phase a.c. induction motor. It presents a design of a low-cost; high-efficiency drive capable of supplying a single-phase a.c. induction motor with a PWM modulated sinusoidal voltage.
BLOCK DIAGRAM
HARDWARE COMPONENTS 8051 series Microcontroller LM358, Opto- isolators IGBT, Push Button Transformer, Diodes Voltage Regulator, Resistors Capacitors, Zener Crystal, Lamp.
EMBEDDED SYSTEMS Definition for :- EMBEDDED SYSTEMS A combination of hardware and software which together form a component of a larger machine. An example of an embedded system is a microprocessor that controls an automobile engine. An embedded system is designed to run on its own without human intervention, and may be required to respond to events in real time.
EMBEDDED SYSTEMS
AT89S52 MICRO CONTROLLER Compatible with MCS®-51 Products 8K Bytes of In-System Programmable (ISP) Flash Memory 4.0V to 5.5V Operating Range Crystal Frequency 11.0592MHZ Three-level Program Memory Lock 256 x 8-bit Internal RAM 32 Programmable I/O Lines Three 16-bit Timer/Counters Eight Interrupt Sources Full Duplex UART Serial Channel Watchdog Timer AT89S52
PIN DIAGRAM OF AT89S52
MOC3021 ( OPTO COUPLER ) Opto-couplers are made up of a LED and a light sensitive device, all wrapped up in one package no electrical connection between the two devices The light sensitive device may be a photodiode, phototransistor, or more esoteric devices such as thyristors, triacs etc.
LM 358 (OPAMP) Internally frequency compensated for unity gain. Large dc voltage gain: 100 Db. Wide bandwidth (unity gain): 1 MHz (temperature compensated) Wide power supply range: Single supply: 3V to 32V or dual supplies: ±1.5V to ±16V Very low supply current drain (500 µA)-essentially independent of supply voltage. Low input offset voltage: 2 mV Input common-mode voltage range includes ground. Differential input voltage range equal to the power supply voltage.
LM 358 PIN DIAGRAM 1 - Output 1 2 - Inverting input 3 - Non-inverting input 4 – VCC- 5 - Non-inverting input 2 6 - Inverting input 2 7 - Output 2 8 – VCC+
IGBT Applications • AC motor speed control • DC servo and robot drives • Uninterruptible power supplies (UPS) • Switched-mode and resonant-mode power supplies • DC choppers Advantages • Easy to mount (isolated mounting hole) • Reduces ass In the normal "off" state, the device restricts current to the leakage current When the gate-to-cathode voltage exceeds a certain threshold the device turns "on" and conducts current.
LOAD
SCHEMATIC DIAGRAM
WORKING OF THE PROJECT PLEASE REFER CD
FUTURE SCOPE
ADVANTAGES
SOFTWARE REQUIREMENTS PROGRAMMING LANGUAGES Embedded C , ALP (Assembly Language) COMPILERS: Keil 2.0/3.0uv DUMPING SOFT WARE: Using Micro controller flash Software we are dumping our HEX Code into Micro Controller
KEIL COMPILER WINDOW
BIBILOGRAPHY The 8051 Microcontroller and Embedded systems” by Muhammad Ali Mazidi and Janice Gillispie Mazidi , Pearson Education. ATMEL 89S52 Data Sheets. www.atmel.com www.beyondlogic.org www.wikipedia.org www.howstuffworks.com www.alldatasheets.com
THANK ‘Q’