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Untitled Prezi EE499
Transcript of Untitled Prezi EE499
Chapter 2 : DIRECT CURRENT MOTORS
Chapter 3 : RELAYS, CONTACTORS AND LIMIT SWITCHES .
Chapter 4 : MICROCONTROLLER. Bader Salem AL-Amri (0909848)
Yazed Ahmal AL-Omari (0909024)
Naif Hamadi Al-Jedanee (0711851)
Khaled Abdullah AL-Zahrani (0907954)
Amro Mohammad AL-Amri (0908735) By Supervised by Dr. Farid Shawki Al-Hosary
Dr. Mohammed E. Aboelmorsy A crane is a mechanism which is commonly used to elevate goods or materials. A crane also is used to carry materials both vertically and horizontally. introduction
Cranes are intended keeping in mind two important considerations.
The first major consideration is that the crane should be able to carry a load of a specified weight.
The 2nd consideration is that the crane ought to remain stable and not fall over when the load is transported to a different location. There are many types of cranes used for different purposes we will mention some of it Types of crane Tower crane 2) Crawler crane 4) Gantry crane Truck-mounted crane Crawler Crane Telescopic crane Floating crane Jib crane Gantry crane The terminal characteristic of a series dc motor is very different from that of the torque in the motor is proportional to the square of its armature current. As a result of this relationship, it is easy to see that a series motor gives more torque per ampere than any other dc motor. It is therefore used in applications requiring very high torques cars, elevator motors, and tractor motors in locomotives. THE SERIES DC MOTOR Induced Torque in a Series DC Motor THE SERIES DC MOTOR THE SERIES DC MOTOR THE PERMANENT-MAGNET DC MOTOR (PMDM) THE PERMANENT-MAGNET DC MOTOR The torque-speed characteristic of a series dc motor THE SERIES DC MOTOR The torque in the motor is proportional to the square of its armature current.
Result of this relationship, it is easy to see that a series motor gives more torque per ampere than any other dc motor. It is therefore used in applications requiring very high torques.
Examples of such applications are the starter motors in cars, elevator motors, and cranes. motors do not require an external field circuit, they do not have the field circuit copper losses. Because no field windings are required. PMDC motors are especially common in smaller fractional- and subfractional-horsepower sizes.
Permanent magnets cannot produce as high a flux density, so PMDC motor will have a lower induced torque T𝜏 per ampere of armature current IA . The resulting torque- speed relationship is:
When the torque on this motor goes to zero, its speed goes to infinity.
if no other load is connected to the motor, it can turn fast enough to seriously damage itself. Characteristic of a Series DC Motor ind Figure(a) represents the pictorial diagram of Permanent magnet dc motor and figure(b) represents the schematic diagram Contactors Limits switches Relays System Design, Simulation and Hardwar Implementation A microcontroller is the integration of
ROM types – commonly flash PROM
RAM – Static ram
parallel input and output(digital I/O)
Timers and Counters
Serial input and output (UART, USART, SPI etc.)
Analogue to digital converters Microcontroller video of our project System Design and Simulation using Proteus System Simulation using MikroC Code entry using MikroC Software Package.
Building the system model using Protus 7 Proffesional Package.
Using the Hex file generated by MikroC in the Protus Simulation.
Programming the PIC microcontroller using K150 USB PIC PROGRAMMER
Building the system hardware using the programmed PIC. System Design and Implementation Steps Very simple to very complex applications
Often single application
but concurrent operation
Could be real-time (hard and soft)
Program is normally stored in ROM – called firmware – flash ROM commonly
Interfacing with other devices via peripherals
Require a range of development tools – hardware and software Some Characteristics Programming the PIC Microcontroller Microcontroller (µC) vs. Microprocessor (µP) consumer appliances
tv's, mp3 players, dvd's, washing machines etc.
engine management, anti-lock braking.
hard disk controllers, routers, switches.
scanners, blood analysers.
satellite control systems. Examples Washing machine runs programs
Open water valve
Do we need a PC running windows Vista to do this ? An embedded system is a special-purpose computer system designed to perform one or a few dedicated functions What is an embedded system? Programming the PIC Microcontroller