Week -2

1.Aim: Making simulink model for Doorbell using Solenoid

Working Principle: Under the effect of electromagnetic excitation [a current passing through conducting wires generate a magneticfield] movement in plunger lead to the working principle of Doorbell

Simulink model represented below:

Model Components:

1. Pulse generator with 50%duty ,period of 4seconds and phase delay of 2%

2. Battery of 12 V DC supply

3. Solenoid and switch with threshold

4. Ideal translational motion sensor

5. Electrical and mechanical references

6. Configuration solver

7. Basic supporting compenonts like PS simulink converter and viceverse with scope

Connect the above components as per above model

Results:

obtain pulses based on input ,pulse ON time: 2sec OFF time: 2sec

As per input[threshold] plunger change in movement will be observed using sensor

Spikes occurences due to electromagnetic effect

Aim: Making thermistor model to control fan with reference to temperature of heater

Working Principle: Making fan control[ ON and OFF] based on temperature changes with the help of thermistor

Simulink model represented below:

Model components:

1. signal builder with different temperature inputs

2. Thermistor with threshold

3. Controlled temperature source

4. DC voltage supply of 15 V

5. Resistor of 15 ohm

6. Voltage sensor

7. Dashboard Switch

8. switch with constants[1&0] for control logic

9. Configuration solver

10. Basic components like scope ,display,mechanical and electrical references, PS-simulink and viceversa etc are used

Results:

Signal builder output as per change in temperature input.[here y axis represents 00-93 is nothing but 300-293]

based on temperature changes the fan will be on for 10-30 seconds [temperature >25 degreee celsius]