AL-E422 THREE PHASE SYNCHRONOUS INDUCTION MOTOR (CUT SECTION MOTOR)

Description

AL-E422 THREE PHASE SYNCHRONOUS INDUCTION MOTOR

(CUT SECTION MOTOR)

AL-E422 – Three-Phase Synchronous Motor (Cut Section Motor)

Product Code: AL-E422 Product Name: Three-Phase Synchronous Motor (Cut Section Motor)

1. Detailed Technical Specifications

2. Constructional Features

• Stator assembly: Laminated steel core with three-phase windings to produce a rotating magnetic field.
• Synchronous rotor: Rotor assembly designed to establish magnetic poles through DC field excitation.
• DC excitation system: Provision for the specified 110 V DC field supply, subject to the actual machine design and nameplate.
• Cut-section construction: Selected portions of the motor housing are opened or removed to demonstrate internal components.
• Single shaft: Provides the mechanical output arrangement.
• Solid yoke extension: Incorporates the specified structural extension.
• Terminal arrangement: Five specified BTI 15 terminals for instructional connections, subject to the actual terminal diagram.
• Metal mounting base: Provides a stable mounting arrangement for laboratory demonstrations.

3. Experiments and Learning Objectives

The AL-E422 is intended to support the following educational activities:

1. Study of synchronous motor construction and operating principles.
2. Identification of stator, rotor, field winding, and shaft assemblies.
3. Understanding the rotating magnetic field produced by a three-phase stator supply.
4. Study of DC excitation and its role in establishing rotor magnetic poles.
5. Understanding the principle of synchronism between the rotor and stator magnetic field.
6. Study of the effect of excitation on motor power factor, using suitable additional instruments.
7. Observation of internal machine components through the cut-section construction.
8. Comparison of synchronous motors with induction motors.

4. Working Principle

A three-phase AC supply to the stator produces a rotating magnetic field. DC excitation establishes magnetic poles on the rotor. When the rotor is brought to synchronous speed and the rotor poles lock magnetically with the rotating stator field, the machine operates as a synchronous motor.

The synchronous speed is calculated using:

Important: The specified speed of 1440 RPM is typical of a four-pole induction motor operating with approximately 4% slip. A conventional synchronous motor operating under steady-state conditions runs at synchronous speed. Therefore, the rated speed and machine type should be verified against the actual nameplate.

5. General Requirements

• Suitable for electrical machines laboratories, engineering colleges, polytechnics, and technical training institutions.
• Robust construction suitable for repeated educational demonstrations.
• Internal components clearly visible through the cut sections.
• Clearly identifiable stator and rotor assemblies.
• Provision for the specified DC excitation connection, subject to manufacturer confirmation.
• Secure mounting on a rigid metal base.
• Clearly identified terminals and suitable electrical safety provisions.

Technical verification note: The supplied designations SPDP, 1P23, and 1C01 have been retained or interpreted as provided. Confirm the exact enclosure, IP protection rating, cooling classification, excitation voltage, and terminal arrangement with the manufacturer before including this specification in a formal tender.

Technical Details