Basic Electricity - Senior Secondary 2 - Project and practical work

Project and practical work

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TERM: 1ST TERM

WEEK TWELVE

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC ELECTRICITY

Topic: PROJECT AND PRACTICAL WORK

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Construct a brushless DC motor drive

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher conduct the practical session

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher guide students while they try some of the processes themselves

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

PROJECT AND PRACTICAL WORK

Topic : Brushless DC Motor Driver project

Materials:

  1. Components:

   - Microcontroller (e.g., Arduino, STM32)

   - MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors)

   - Gate drivers

   - Current sensors

   - Voltage regulators

   - Capacitors, resistors, and other passive components

   - BLDC motor

   - Sensors (optional, for sensored control)

   - PCB (Printed Circuit Board)

  1. Tools:

   - Soldering iron and solder

   - PCB fabrication tools (if making your own PCB)

   - Multimeter

   - Oscilloscope (for testing and debugging)

   - Power supply

   - Computer for programming and testing

Methods:

  1. Research and Selection:

   - Research different components and select ones that meet the project requirements.

   - Consider factors such as voltage rating, current handling capacity, switching speed, and cost.

  1. Acquisition:

   - Purchase the selected components from electronic component suppliers or online stores.

   - Ensure that the components are genuine and meet the required specifications.

  1. Fabrication:

   - Design the circuit schematic using electronic design software like Eagle, KiCad, or Altium.

   - Create a PCB layout based on the schematic design.

   - Fabricate the PCB either by outsourcing to a PCB manufacturer or by using DIY methods like etching.

  1. Assembly:

   - Solder the components onto the PCB according to the PCB layout.

   - Follow proper soldering techniques to ensure good electrical connections and prevent solder bridges.

  1. Programming:

   - Write or download firmware/software for the microcontroller to control the motor driver.

   - Program the microcontroller using an appropriate development environment (e.g., Arduino IDE, STM32CubeIDE).

  1. Testing:

   - Test the motor driver prototype for basic functionality, including motor startup, speed control, and direction control.

   - Use a multimeter and oscilloscope to measure voltages, currents, and waveforms at various points in the circuit.

   - Troubleshoot any issues and refine the design as needed.

Procedure:

  1. Research and Planning:

   - Identify the required components and tools based on project specifications.

   - Research the operating principles of BLDC motors and motor drivers.

  1. Component Acquisition:

   - Purchase the selected components from suppliers or online stores.

  1. Fabrication and Assembly:

   - Design the circuit schematic and PCB layout.

   - Fabricate the PCB either in-house or through a manufacturer.

   - Assemble the components onto the PCB using proper soldering techniques.

  1. Programming:

   - Write or download firmware/software for the microcontroller.

   - Program the microcontroller with the motor control software.

  1. Testing and Debugging:

   - Test the motor driver prototype for functionality and performance.

   - Use testing equipment to verify proper operation and troubleshoot any issues.

  1. Optimization and Refinement:

   - Optimize the motor control algorithms and parameters for better performance.

   - Refine the design based on testing results and feedback.

  1. Documentation:

   - Document the design process, including schematics, PCB layouts, firmware/software code, and test results.

 

EVALUATION: 1. Teacher evaluates students based on their performance from the practical

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively