Electronic Teaching Aids

A single-phase induction motor is the most widely used type of motor in homes, workshops, and small machines because of its simplicity, ruggedness, and reliability. Among its compact designs, the pipe body frame motor is a lightweight, cylindrical-shaped version where the stator and rotor assembly are housed inside a pipe-like frame.

The 0.25 HP (Horsepower) rating corresponds to approximately 186 watts, making it suitable for light-duty applications such as small pumps, blowers, grinders, fans, and laboratory trainers.

Construction

1. Frame (Pipe Body):

   • Cylindrical “pipe” housing made from mild steel or aluminum.

   • Compact design with minimum material, reducing overall weight and cost.

   • Ventilated with openings or provided with external fan for cooling.

2. Stator:

   • Laminated steel core with distributed single-phase winding.

   • Main winding connected directly to AC supply.

   • Auxiliary winding connected with a capacitor or centrifugal switch (depending on type).

3. Rotor:

   • Squirrel-cage type rotor made of aluminum or copper bars short-circuited by end rings.

   • Rugged and maintenance-free design.

4. Bearings and Shaft:

   • Ball or sleeve bearings mounted at both ends.

   • Shaft extends outside for coupling with load.

5. Capacitor Housing:

   • In capacitor-start or capacitor-run versions, a capacitor box is mounted externally.

6. Cooling System:

   • External fan mounted on rotor shaft.

   • Air passes through body slots to keep temperature under control.

Features

• Power Rating: 0.25 HP (~186 W).

• Supply Voltage: 220–240 V, 50 Hz (single-phase AC).

• Speed: Around 1400–2800 rpm (depending on pole design).

• Type: Capacitor start or capacitor start–capacitor run.

• Frame: Compact pipe-type cylindrical housing.

• Mounting: Foot or base mounting for small machines.

• Insulation Class: Class B or F for durability.

• Duty Cycle: Continuous (S1).

Applications

• Small Water Pumps (domestic & agricultural).

• Fans and Blowers in workshops and labs.

• Grinders, Mixers, and Small Machines requiring fractional horsepower motors.

• Educational Trainers for demonstrating single-phase motor working.

• Medical and Laboratory Equipment where compact size is essential.

Benefits

• Compact and Lightweight due to pipe frame design.

• Low Cost compared to heavy cast-iron body motors.

• Easy to Install on tables, stands, or small equipment.

• Reliable Operation with squirrel-cage rotor and capacitor starting.

• Energy Efficient for small-scale continuous operation.

• Versatile for a variety of household and laboratory applications.

We deal in and provide Single Phase Electric Motor. We provide Single Phase Electric Motor from 0.75-1.5 KW range.

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