For electrical machinery teaching labs, a reliable motor-generator coupling platform is essential to help students intuitively understand induction motor principles and power generation characteristics. Today we are introducing the MR715E Group, a slip-ring asynchronous motor coupled dynamo-balance experimental unit tailored for electrical teaching and basic machine testing.
 
1. Product Overview
The MR715E set integrates a three-phase slip-ring asynchronous motor and a 220V rated DC machine for coupled running. When working in coupled mode, the asynchronous motor and the dynamo must rotate at synchronous speed to maintain steady power transfer. It comes with standard terminal blocks and coupling assemblies, greatly simplifying mechanical alignment and wiring work. Its rated speed is 1500 rpm, with an allowable speed deviation of ±10%. This flexible speed tolerance makes it ideal for low-power drive experiments that do not demand ultra-precise speed control.
 
2. Core Product Features
- Excellent coupling compatibility: Directly coupled structure forms a complete electromechanical drive unit with the slip-ring asynchronous motor.
- Speed synchronisation requirement: Co-rotating at identical rotational speed guarantees stable coordinated operation of the whole system.
- Consistent DC output: Delivers steady DC power output for low-power DC loads and classroom experimental tests.
- User-friendly assembly: Pre-equipped with couplings and terminal blocks to cut down mechanical and electrical setup time.
- Wide speed tolerance: 1500 rpm rated speed with ±10% operational deviation, adapting to diverse test conditions in teaching scenarios.
 
 3. Technical Specifications
- Power supply: Three-phase five-wire AC 380V, 50Hz
- Overall dimension: 740mm*770mm*190mm
- Net weight: Less than 20kg
Compact and lightweight, this bench-top apparatus is easy to move and arrange in laboratories without special lifting equipment.
 
 4. Components & Supporting Accessories
The main components include 1 generator, 1 three-phase asynchronous slip-ring motor, 1 motor shaft and 1 motor base. The solid base suppresses vibration during operation.
Colour-coded 4mm safety connection cables are supplied for fast, standardised wiring:
- Black 1m double-ended safety cable ×6
- Blue 1m double-ended safety cable ×2
- Green 1m double-ended safety cable ×2
- Red 1m double-ended safety cable ×2
- Yellow 1m double-ended safety cable ×2
 
5. Available Teaching Experiments
This experimental platform supports two classic electrical machine experiments for teaching purposes:
1. Power Generation Experiment**
Students observe the process that the asynchronous motor drives the DC dynamo, record voltage and current variations, and master the energy conversion from mechanical energy to DC electric energy.
2. Starting Experiment
Learners test the starting performance of the slip-ring asynchronous motor under coupled load, analyse starting current and torque features, and consolidate theories of wound rotor induction motors.
This MR715E unit is designed for vocational and university electrical labs. With stable performance and complete accessories, it is a practical teaching device for electrical machinery courses.