How to drive your electric model train with a micro motor
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Electric model trains are the favorite mechanical models of many enthusiasts, but their operation is not just a simple power switch, but relies on micro motors to drive, speed control, and brake to form a complete power system. In this article, we will discuss the relationship between electric model trains and micro motors to understand how they go from rest to speed and then stop smoothly.
How electric model trains work: How do micromotors drive them?
The core power of electric model trains comes from micro motors ( traditional DC motors or Coreless Motors ), which convert electrical energy into mechanical energy, drive the train's gear system to drive the wheels, thereby achieving forward movement, stopping and speed adjustment.
Generally, electric model trains work in two ways: track-powered and battery-powered:
Track powered: The track itself provides the current, and the train transmits the power to the internal motor through the wheels or collectors.
Battery powered: The battery directly supplies power to the motor, without relying on external rail power.
Either way, the motors, gear trains and electronic control modules inside the train work together to ensure the smooth operation of the train.
So how exactly do electric model trains work?
1. Power supply
Track power supply: Electricity is transmitted through the tracks to the motors inside the train, usually direct current ( DC ) or digital command control ( DCC ) .
Battery powered: The train has its own internal battery that directly powers the motor, without relying on track current.
2. Motor drive and acceleration
When the controller or transformer adjusts the voltage and current, the electrical energy is transmitted to the micro motor inside the train.
Brushless motor ( BLDC ) : The electronic controller ( ESC ) adjusts the current phase to achieve efficient drive and precise control.
Coreless motor: Compared with traditional DC motors, coreless motors have a coreless structure, less inertia, and faster start-stop response. It relies on the coil winding to directly induce the magnetic field to drive the rotor, making the motor start faster, accelerate more smoothly, and consume less energy, making it very suitable for high-end electric model trains.
Gear transmission system: The motor drives the gears to reduce speed, so that the wheels obtain smooth torque and gradually accelerate forward.
3. Constant speed operation
When the set speed is reached, the motor maintains a stable speed and the train travels at a constant speed.
The controller can precisely control the voltage through pulse width modulation ( PWM ) technology to adjust the speed of the motor.
4. Slow down and stop
When stopping is required, the controller gradually reduces the input voltage or PWM signal to reduce the motor speed.
Brushless motor braking: Provides smoother deceleration by adjusting the current through an electronic controller.
Coreless motor braking: Due to the small inertia and fast response of the coreless motor, it can reduce the current input more quickly and achieve more accurate deceleration and stopping. At the same time, due to the iron-coreless structure, there is no eddy current loss, making the braking process smoother and jitter-free.
In addition, some high-end model trains also use electromagnetic brakes or reverse current braking, which can stop the train more quickly and ensure the safety and authenticity of the operation.
Micromotor manufacturer, boosting the development of electric model train industry
In the micromotor industry, VSD is a leading micromotor manufacturer in China and even in the world, focusing on the research and development, production and sales of high-performance motors. With its outstanding technological innovation capabilities, VSD generates billions of RMB in annual sales and provides customized micromotor solutions for many industries around the world.
VSD's products cover multiple fields, including medical equipment, intelligent robots, drones, industrial automation, model toys, etc. Among them, brushless motors ( BLDC Motor ) and Coreless Motor are one of VSD's core products, which are widely used in the high-end electric model train market.
With the continuous advancement of micromotor technology, VSD has found that more and more electric model train manufacturers are beginning to adopt Coreless Motors as drive solutions. The rise of this trend is mainly influenced by the following two factors:
1. The robotics industry promotes the widespread application of Coreless Motors
In recent years, the rapid development of robotics has led to a significant increase in demand for high-precision, high-response speed motors. Coreless motors have gradually become the preferred drive motors in the robotics industry due to their ironless structure, low inertia, fast response, and high energy efficiency.
Due to the boom in the robotics industry, more and more engineers and manufacturers are beginning to realize the technical advantages of Coreless Motors and apply them to other fields, including electric model trains.
2. Rapid development of Coreless Motor manufacturing technology
In the past, the high manufacturing cost of Coreless Motors limited their application in the consumer market. However, with the continuous breakthroughs in production technology, micro motor manufacturers such as VSD have optimized the winding process, magnetic circuit design and drive technology, greatly reducing production costs, making Coreless Motors more economical and practical.
Today, VSD can provide high-efficiency, stable, and longer-life Coreless Motors, and customize the design according to customer needs, including size, speed, torque, voltage, lead terminals, etc., to meet the needs of different manufacturers. This has led to more and more electric model train brands starting to choose Coreless Motors as the main power system, further promoting the technological upgrade of the entire industry.
Compared with brushless motors
Although brushless motors ( BLDC ) have been widely used in various electric model trains, coreless motors have more obvious advantages in some aspects due to their unique structure and characteristics, especially in scenarios with high requirements for fine control, response speed and energy efficiency. The following is a main comparison between the two:
Inertia and response speed
Coreless motor: Due to its coreless structure, the rotor is lighter and has very small inertia, which makes the motor's start and stop response faster and can complete speed adjustment within milliseconds. It is suitable for electric model trains that require frequent acceleration and deceleration.
Brushless motor: Although it also has high efficiency, its rotor usually contains an iron core, which has a large inertia and a slightly slower start-stop response, especially when fine-tuning at low speeds. It may not be able to achieve the accuracy of a Coreless Motor.
Low speed control and stability
Coreless motor: The coreless structure eliminates the cogging effect of traditional motors, making the motor more stable at low speeds without any sense of frustration. This makes the coreless motor perform more smoothly when driving at a low and uniform speed and fine-tuning the speed.
Brushless motor: Although the low-speed performance can be optimized by the electronic controller ( ESC ) , there may still be some low-speed vibration or jitter due to the slot effect, affecting the smoothness.
Energy consumption and efficiency
Coreless motor: Due to the coreless structure, core loss and eddy current effect are avoided, resulting in lower energy consumption and higher operating efficiency. Under the same power output, the energy efficiency of coreless motor is usually better than that of brushless motor, and it is more suitable for electric model trains with high requirements for endurance.
Brushless motor: The efficiency is relatively high, but there is still a certain amount of iron loss and eddy current loss, especially under high load or long-term operation, the energy consumption is slightly higher than that of the Coreless Motor.
Volume and weight
Coreless motor: Due to its compact structure and lack of iron core, it is lighter in overall weight. While ensuring sufficient power output, it helps to reduce the overall weight of the electric model train and improve acceleration performance and endurance.
Brushless motor: At the same power, it is usually slightly larger and heavier than the Coreless Motor, which may affect the load and power balance of the train.
Noise and running smoothness
Coreless motor: There is no change in the magnetic resistance of the iron core during operation, which avoids the electromagnetic noise of traditional motors. At the same time, the friction is smaller, making the overall operation quieter and smoother, especially suitable for high-end electric model trains.
Brushless motor: Although the brushless structure reduces the noise caused by brush friction, it may still produce certain high-frequency noise due to the cogging effect or electromagnetic interference.
VSD coreless motor recommendation:
VEC - 1218 is a high-performance micro Coreless Motor with a diameter of only 12mm, suitable for applications with strict requirements on size and weight. The motor has ultra-high speed ( up to 62215 rpm ) , low inertia and no cogging, which makes it excellent in start-stop response and precise control. With its low noise and high energy efficiency, VEC - 1218 is very suitable for electric model trains, medical equipment, precision instruments and other fields. In addition, the motor supports customized output shaft, lead wire, voltage and speed to meet the needs of different customers.
The VEC - 2233 coreless motor is designed with a 22mm diameter, with strong power and high-efficiency output, a maximum speed of 36,000 rpm, and a starting torque of up to 70.632 mN·m. Its non-cogging design makes the motor run smoother and quieter, making it particularly suitable for applications that require precision control and stability, such as electric model trains, robot actuators, and medical equipment. The motor supports customized services, including speed, voltage, output shaft, etc., to ensure that the personalized needs of different customers are met.
VEC - 2850 is a 28mm diameter high-performance Coreless Motor designed for high torque and high stability applications. Its maximum efficiency torque can reach 22.492 mN·m, and the starting torque is as high as 187.794 mN·m, ensuring smooth and strong power output under various load conditions. The motor has the characteristics of low inertia, no cogging effect, and low noise, and is suitable for high-end model trains, precision industrial equipment and professional-grade power tools. In addition, VEC - 2850 can customize the output shaft, lead wire, voltage and speed according to needs to adapt to different application scenarios.
at last
As the world's leading micromotor manufacturer, VSD continues to promote the development of micromotor technology and provide electric model train manufacturers with more efficient, reliable and customized drive solutions. VSD will continue to focus on high-end micromotor technology, helping the global model train industry move to a higher level, so that every model enthusiast can enjoy a more realistic, smooth and precise driving experience.
VSD has strong R&D and customization capabilities and can tailor micro motor solutions to your needs. If you are looking for an efficient and stable drive motor, please contact us for free consultation and customized solutions!
