AL-E297 THREE PHASE SLIP RING INDUCTION MOTOR (CUT SECTION MOTOR)

Description

AL-E297 THREE PHASE SLIP RING INDUCTION MOTOR

(CUT SECTION MOTOR)

Three-Phase Slip Ring Induction Motor

MODEL NO: AL-E297

Detailed Technical Specifications

-------------------------------------------------------------------------------------------------------------------------------------------Product Code: AL-E297 Product Name: Three-Phase Slip Ring Induction Motor Category: Electrical Machines Training Equipment

1. Technical Specifications

2. Constructional Features

• Stator assembly: Laminated steel core accommodating three-phase stator windings to generate the rotating magnetic field.
• Wound rotor: Contains a three-phase rotor winding designed for connection to an external resistance circuit through slip rings.
• Slip ring assembly: Provides electrical access to the rotor windings for studying starting characteristics and speed control.
• Brush arrangement: Suitable brush contacts provide electrical connections between the stationary external circuit and rotating slip rings, where included in the supplied design.
• Single shaft: Provides the mechanical output and supports the rotating assembly.
• Solid yoke extension: Incorporates the specified structural extension.
• Terminal arrangement: Six specified terminals for instructional connection and demonstration, subject to the actual terminal configuration.
• Mounting base: Rigid metal base for secure installation in laboratory environments.

3. Experiments and Learning Objectives

The AL-E297 is suitable for the following laboratory experiments:

1. Study of the construction and working principle of a three-phase slip ring induction motor.
2. Identification of stator, wound rotor, slip rings, brushes, and shaft.
3. Study of rotor resistance starting methods.
4. Investigation of the effect of external rotor resistance on starting torque.
5. Study of speed control by varying external rotor resistance.
6. Observation of the relationship between load, speed, and slip.
7. Study of three-phase stator and rotor winding connections.
8. Comparison of slip ring and squirrel cage induction motors.
9. Understanding rotor copper losses and efficiency characteristics.

4. Working Principle

When a three-phase AC supply is applied to the stator windings, a rotating magnetic field is produced. This field induces an electromotive force and current in the wound rotor. The interaction between the stator field and rotor current produces electromagnetic torque, causing the shaft to rotate.

The slip rings allow external resistance to be inserted into the rotor circuit. During starting, this resistance can improve starting torque and limit starting current. Reducing the external resistance as the motor accelerates enables normal operation. External rotor resistance can also be used to demonstrate speed control, although it introduces additional power losses.

5. General Requirements

• Suitable for electrical machines laboratories, engineering colleges, polytechnics, and technical training institutions.
• Robust construction for repeated educational use.
• Accessible components for observation and demonstration.
• Slip rings and rotor connections suitable for instructional experiments.
• Clearly identified terminals for connection and testing.
• Secure installation on a rigid metal base.
• Operation with suitable electrical protection and under qualified supervision.

Technical verification note: The designations SPDP, 1P23, and 1C01 have been retained or interpreted from the supplied specifications. Confirm the exact enclosure, IP protection rating, and cooling classification with the manufacturer before using this document for a formal tender. The stated six-terminal arrangement should also be checked against the motor's actual winding and terminal diagram.

Technical Details