Basic Electricity - Senior Secondary 2 - Application of AC motor

TERM: 1^ST TERM

WEEK ELEVEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC ELECTRICITY

Topic: APPLICATION OF AC MOTOR

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

I.) State the domestic Applications of AC Motors

II.) State the industrial Applications of AC Motors

III.) Discuss the principles of a Drilling Machine

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

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

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

APPLICATION OF AC MOTOR

Domestic Applications of AC Motors

1. Refrigerators and Freezers: AC motors are used in refrigeration systems to power compressors, which circulate refrigerant and maintain cold temperatures.
2. Washing Machines: AC motors drive the agitator or drum in washing machines, facilitating the washing and rinsing of clothes.
3. Air Conditioners: AC motors power the fans and compressors in air conditioning systems, circulating air and cooling or heating the indoor environment.
4. Vacuum Cleaners: AC motors drive the suction mechanism in vacuum cleaners, allowing for the efficient cleaning of floors and carpets.
5. Kitchen Appliances: AC motors are used in various kitchen appliances such as blenders, food processors, and mixers for food preparation tasks.
6. Ceiling Fans: AC motors power the rotating blades of ceiling fans, providing air circulation and cooling in residential spaces.

Industrial Applications of AC Motors

1. Pumps: AC motors drive pumps used in industries such as water treatment, oil and gas, agriculture, and manufacturing for fluid transfer and circulation.
2. Conveyor Systems: AC motors power conveyor belts in factories and warehouses for the movement of goods and materials along production lines.
3. Fans and Blowers: AC motors drive fans and blowers used in HVAC systems, industrial ventilation, and cooling applications.
4. Machine Tools: AC motors power various machine tools such as lathes, milling machines, and grinders in manufacturing and machining processes.
5. Compressors: AC motors drive compressors used in pneumatic systems, refrigeration, air conditioning, and industrial processes for compression of gases.
6. Mixers and Agitators: AC motors are used in mixing and agitation equipment for blending, stirring, and homogenizing materials in chemical, pharmaceutical, and food processing industries.

Principles of a Drilling Machine

A drilling machine is a tool used for drilling holes in various materials. The principles of operation involve:

1. Rotary Motion: The drilling machine generates rotary motion either manually or through a motor. This motion is transmitted to the drill bit, causing it to rotate at high speed.
2. Cutting Action: The rotating drill bit applies force to the workpiece, cutting into it and creating a hole. The cutting action is facilitated by the sharp edges of the drill bit.
3. Feed Mechanism: The drilling machine features a feed mechanism that controls the downward movement of the drill bit into the workpiece. This ensures controlled and precise drilling depth.
4. Coolant System: Many drilling machines incorporate a coolant system to lubricate and cool the drill bit during operation. This helps prevent overheating and extends the life of the tool.
5. Clamping and Holding: The workpiece is securely clamped or held in place on the drilling machine's worktable or fixture to prevent movement during drilling.

EVALUATION: 1. State 4 domestic applications of AC motor

2. State 4 industrial applications of AC motor
3. Discuss briefly the principles of a drilling machine.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively