When learning electrical machines, the universal (series-wound) motor is always a key topic. It is widely used in power tools and household appliances, yet many learners find it hard to observe and compare its performance under AC and DC power. Today we introduce the MR712E Dual-Purpose DC/AC Motor, a dedicated teaching trainer built for universal motor hands-on experiments.

 

1. Product Overview
AC/DC universal motors, also known as series-wound motors, can run normally supplied by either alternating current or direct current. This kind of motor is commonly applied in electric drills, angle grinders, vacuum cleaners, mixers and various power tools. The MR712E dual-purpose motor is developed as a teaching model, which supports working with 220V AC and the same voltage level of DC power, helping students intuitively understand the operating characteristics of series-wound motors.
 
2. Core Product Features
The main advantage of MR712E lies in its dual-power compatibility. It can operate stably when connected to 220V single-phase AC power, and it is also compatible with 220V DC power supply of the same grade. Learners can carry out contrast tests on one single device to observe the difference in motor operation under AC and DC input, which fills the demand of electrical teaching for comparative experiments.
 
3. Technical Specifications
Power supply: Single-phase two-wire AC 220V / DC 220V
Overall dimension: 280mm*235mm*220mm
Weight: Less than 10kg
Compact outline and light weight make the trainer easy to place on the workbench, transport and store. It fits well for university, vocational college and electrical skill training laboratories.
 
4. Main Components and Accessories
The main body contains three key parts: panel for wiring and observation, bearing for smooth rotor rotation, housing for fixation and protection.
Standard accessories: 2 pcs red 4mm safety cables (1m, double-ended), 2 pcs black 4mm safety cables (1m, double-ended). The 4mm safety test leads comply with laboratory safety standards for quick and reliable wiring.
 
5. Teaching Experiment Items
A complete experiment manual is provided with detailed operation steps. Three basic experiments can be implemented: introduction to dual-purpose DC/AC motors, motor operation experiment with DC connection, motor operation experiment with AC connection. These experiments guide learners from theoretical cognition to practical wiring and running tests.
 
6. Application Scenarios
This trainer is designed for electrical and mechatronics teaching. It works well for teacher demonstration and student independent practical training. Teachers can explain series-wound motor principles, and students can practice wiring and compare running performance under different power supplies.