In the fields of motor education and small-scale industrial training, the three-phase asynchronous slip-ring motor stands out from standard squirrel-cage asynchronous motors due to its unique advantages—specifically, controllable starting and precise speed regulation—making it a core piece of equipment for teaching electrical drive systems. Today, we provide a detailed breakdown of the MR613E three-phase asynchronous slip-ring motor, offering a comprehensive overview that covers its operating principles, key features, technical specifications, structural composition, and applications in educational experiments.

I. Product Overview: What is the MR613E Slip-Ring Asynchronous Motor?
The MR613E three-phase asynchronous slip-ring motor—also known as a wound-rotor asynchronous motor—is a specialized three-phase asynchronous motor designed specifically for educational and training environments. Compared to conventional asynchronous motors, its key design distinction lies in the rotor circuit structure; a combination of slip rings and brushes connects the rotor windings to an external circuit, enabling external control of the rotor loop. This effectively resolves common issues such as high starting surges and poor speed regulation performance, making it an essential teaching aid for training in electrical control and motor drive systems.
1.1 Core Structural Components
The MR613E slip-ring motor retains the classic core architecture of a three-phase asynchronous motor while optimizing the rotor control structure. Its three main components work together with clear, precise coordination:
Stator Section: Identical in structure to that of a standard three-phase asynchronous motor, it consists of an iron core and three-phase symmetrical windings. It connects directly to a three-phase power supply and serves as the core stationary component for electromagnetic induction and energy conversion, providing the fundamental power output for stable motor operation.
Rotor Section: Features windings connected in a three-phase star configuration, with the winding ends brought out to connect to three collector slip rings. Unlike the enclosed rotor structure of squirrel-cage motors, this design provides the hardware foundation for external control circuits, serving as the critical element that enables variable speed control and soft starting.
Slip Ring and Brush Assembly: Acting as the core control component, this assembly establishes an electrical connection between the rotor windings and external devices—such as resistors or variable frequency drives—through the contact between carbon brushes and the slip rings. During operation, devices such as variable resistors and variable frequency drives (VFDs) can be flexibly connected to freely adjust rotor circuit parameters, enabling dynamic control of motor performance.
1.2 Core Product Advantages
The MR613E has been comprehensively optimized to meet the demands of frequent use, repetitive operation, and diverse environments typical of educational training. It features three key highlights:
Exceptional Electrical Safety: It employs specialized protective designs and reliable grounding structures to effectively prevent hazards such as electric leakage and short circuits. It is suitable for various teaching scenarios—including student hands-on practice and structured training courses—ensuring safe electrical operation.
Sleek and Refined Structural Design: The unit features a neat, aesthetic exterior and a clean, uncluttered internal layout. Components are logically arranged, allowing teachers and students to easily observe the motor's internal structure and understand its operating principles, while also simplifying installation, inspection, and maintenance.
Rugged Durability and Long Service Life: Constructed from high-strength, corrosion-resistant materials, the unit withstands routine training operations and diverse environmental conditions. Its excellent resistance to wear and aging significantly extends the equipment's lifespan and reduces replacement costs.
 
II. Precise Technical Parameters Meeting Training Standards
The MR613E is designed in strict accordance with standards for educational training equipment. Its parameters align with common domestic electrical teaching environments, offering superior compatibility and stability. Key technical specifications are as follows:
2.1 Electrical and Environmental Parameters
Rated Power Supply: Three-phase, five-wire system (AC 380V, 50Hz). It perfectly matches standard power supply systems in domestic campus training centers and laboratories, allowing for immediate use without modifying existing power infrastructure.
Operating Environment: Suitable for ambient temperatures between -10°C and +40°C, with relative humidity below 85% at 25°C. It adapts seamlessly to the conditions of standard laboratories and training classrooms.
2.2 Dimensions and Weight
The unit features a lightweight, compact design, measuring 380mm × 220mm × 240mm and weighing less than 10kg. Its small, portable form factor makes it easy to position in laboratories and arrange on training benches, as well as convenient to transport for classroom demonstrations, making it suitable for a wide range of teaching scenarios.
 
III. Complete Component Disassembly: Understanding the Equipment's Structural Logic
The MR613E features a modular and standardized structure with clearly defined roles for its main components and accessories. This design ensures stable operation while allowing students to easily study the function of each component and quickly grasp the principles behind the motor system's configuration.
3.1 Core Components
The main unit comprises seven core components that work in concert to form a complete motor operation and control system:
1. Power Terminal Block (1 unit): Handles the main power input, organizes wiring, and ensures a stable, standardized power supply;
2. Coupling (1 unit): Connects the motor's power output to the load equipment, enabling power transmission and simulating industrial load conditions;
3. Three-Phase Slip-Ring Motor (1 unit): The core power component that converts electrical energy into mechanical energy to drive the motor;
4. Slip-Ring Terminal Block (1 unit): Dedicated to connecting external wiring for the rotor circuit, providing ports for speed regulation and soft-start control;
5. Motor Base (1 unit): Securely supports the motor, providing vibration damping and stability to ensure smooth, wobble-free operation;
6. Slip-Ring Starter (1 unit): Controls the motor startup sequence, enabling soft-start functionality and reducing inrush current;
7. Disc Resistors (3 units): Core components for external control resistance; they interface with the rotor circuit to allow precise adjustment of motor speed and starting torque.
3.2 Standard Accessory Set
The equipment comes with a complete set of safety wiring accessories that meet practical training requirements; these accessories feature standardized specifications and comply with safety regulations. They include 4mm safety patch cords in four colors (green, red, black, and yellow) and specialized connectors. The clear color-coding and easy-to-use plug-and-play design align with instructional wiring standards, helping students develop habits of standardized wiring.
 
IV. Core Teaching and Experimental Applications: Meeting Classroom Training Needs
As a specialized educational motor unit, the MR613E is designed primarily for practical training in electrical engineering. It focuses on wiring and startup experiments for three-phase asynchronous slip-ring motors, serving as a key component in foundational training for motor drive systems and electrical control.