The problem with this method is that it is not very reliable as a person is prone to error or negligence in his work. Manual Control means the presence of a person at a site who checks the present conditions (sensor), compares it with the desired value (processing) and takes appropriate action to obtain the desired value (actuator). A simple example could be of controlling the temperature in a room. Hence, the Field of ” Control System Engineering” was developed.Ĭontrol System Engineering can be defined as using various methods to control the working of a process or maintenance of a constant and preferred environment, be it manual or automatic. The purpose being to reduce man’s involvement in these processes thereby, reducing the error in these processes. With the advent of computers and the industrialization of processes, throughout man’s history, there has always been research to develop ways to refine processes and more importantly, to control them using machines autonomously. It requires a lot of concepts and theory so we go into it first. Additionally you can put the radiator, but the current does not exceed 5A do not think is appropriate.This is tahir ul haq with another project. This assembly was tested with an engine that had a rated current of 4A and transistors temperature no more than 30 degrees. To avoid skin effect due to motor windings maximum PWM frequency is 10KHz. Meanwhile other MOSFET will be placed in logical 0 by the controller.
Variation of duty cycle will vary the speed of rotation.
To switch low side MOSFET I used driver current 2A, MAX627.Īccording to the diagram, to rotate the electric motor in a sense we need to apply the command on to the point A (5V from ATMEGA328) and low side MOSFET diagonally ordering the PWM duty cycle between 0 and 100%. For hig side the use IRF5305, which also rds-on small and low gate charge. For low side mosfet i use IRF3205 that have very low RDS on and low gate charge. My concept is a montage H bridge using only low side mosfet to control engine speed, and high side mosfet is used only to open and close the circuit.
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