Coreless motors: ideal drive options for rehabilitation robots

I believe everyone is familiar with the word robot. Each robot has its own capabilities and functions. Medical rehabilitation robots are mainly invented to help patients with rehabilitation training, improve rehabilitation efficiency, and reduce the workload of medical staff. Its core purpose is to increase the speed of functional recovery of patients, improve the quality of life, and reduce the cost of rehabilitation treatment. Specifically, the functions of medical rehabilitation robots include:

1. Assist patients to recover their motor function: For patients with motor dysfunction caused by stroke, spinal cord injury, cerebral palsy, Parkinson's disease and other diseases, rehabilitation robots can provide precise and repeatable training to improve the recovery effect of patients.

 

2. Reduce the dependence on manual labor for rehabilitation treatment: In the past, rehabilitation treatment could only rely on professional rehabilitation therapists for repetitive training, and could not provide continuous and stable training support. However, rehabilitation robots can perfectly solve this problem, thereby greatly reducing the cost of manpower.

 

3. Personalized rehabilitation training: Modern rehabilitation robots can provide personalized training modes, such as strength assistance, gait correction, etc., according to the patient's rehabilitation stage and needs, to improve the treatment effect.

 

4. Improve long-term care and home rehabilitation: With the development of telemedicine, rehabilitation robots are gradually entering homes. Portable or home-based rehabilitation robots allow patients to receive high-quality rehabilitation training at home, reduce hospital stays, and reduce rehabilitation costs.

 

 

The reason why rehabilitation robots are so powerful is that their motor drive system plays a very important role. It directly affects the accuracy, stability, safety of the robot's movement and the patient's rehabilitation experience. As the core power source of medical rehabilitation robots, the motor drive system determines the robot's movement mode and control capabilities. It mainly includes the following:

 

1. Precise control to improve rehabilitation effect

Rehabilitation training requires high-precision and accurate motion control. For example, hand function rehabilitation robots need to accurately simulate the natural grasping movements of fingers, and gait rehabilitation robots need to accurately control the pace and strength of steps. High-performance motor drive systems can ensure smooth and accurate displacement and torque output, avoid excessive or insufficient movement, and improve training effects.

 

2. Stability and comfort to improve patient experience

The key to rehabilitation training is to gradually enhance the adaptability of the patient's muscles and nerves. If the motor drive is unstable, it may cause vibration, shaking or sudden impact during the training process, affecting the patient's experience or even causing secondary injuries. Therefore, rehabilitation robots usually use low-noise, high-smoothness brushless DC Coreless Motors to ensure a smooth and comfortable training process.

 

3. Fast response speed, adaptable to different recovery stages

During the rehabilitation process, patients may need different training intensities and adaptive adjustments, such as gradually transitioning from passive training to active training. High-response motors can adjust output power in real time based on sensor data, allowing the robot to flexibly adapt to the patient's recovery process and improve training efficiency.

 

4. High safety to avoid secondary damage

Rehabilitation robots need to ensure the safety of patients and prevent injuries caused by overload or sudden loss of control during training. Therefore, motor drive systems are usually equipped with safety mechanisms such as overload protection, stall protection, and torque limitation to ensure a stable and safe rehabilitation training environment under any circumstances.

 

5. Low energy consumption, supports long-term continuous operation

Rehabilitation training usually requires long-term, high-frequency repetitive movements, so the motor drive system needs to have the characteristics of high efficiency and low energy consumption. For example, brushless DC Coreless Motors are widely used in rehabilitation robots due to their high efficiency, low energy consumption and low temperature rise to ensure that the equipment can operate stably for a long time.

 

 

From the above, we also know that a high-performance motor drive system can not only improve the accuracy, stability and safety of rehabilitation training, but also reduce energy consumption, improve patient experience, and adapt to personalized rehabilitation needs. Among the many types of motors, the Coreless Motor has become the preferred drive solution for rehabilitation robots due to its unique structure and excellent performance. Compared with traditional motors, the Coreless Motor has the characteristics of no core, low inertia, and high efficiency, which enables it to provide more accurate, stable, and efficient power support during rehabilitation training.

 

1. Coreless design to eliminate cogging effect

The iron core structure of traditional motors is prone to cogging, which causes slight vibration and noise during operation. The coreless motor, however, completely eliminates the cogging effect due to its iron-coreless winding, achieving ultra-smooth, vibration-free operation. This is especially important for rehabilitation training, as it can prevent mechanical shock during training and improve the patient's sense of safety and comfort.

 

2. Extremely low moment of inertia for more sensitive motion control

The rotor of the coreless motor adopts a lightweight winding structure, which makes its rotational inertia much lower than that of traditional motors. This low inertia characteristic enables the motor to complete start-stop or speed change operations in a very short time, achieving precise dynamic response. In rehabilitation training, whether it is simulating fine hand movements or controlling the rhythm of gait training, the coreless motor can respond to the patient's rehabilitation needs in milliseconds, avoiding training hysteresis or overshoot.

 

3. High efficiency and low energy consumption, supporting long-term stable operation

Rehabilitation training usually requires long-term, high-frequency repetitive movements, so the energy efficiency of the motor is crucial. The copper and iron losses of the Coreless Motor are extremely low, the operating efficiency can reach more than 85%, and the heat generation is small, reducing the burden on the cooling system. This not only allows the rehabilitation robot to operate more stably for a long time, but also reduces the overall energy consumption of the equipment, making it more energy-saving and environmentally friendly.

 

4. Accurate torque control to adapt to different rehabilitation stages

Patients at different stages of rehabilitation have different strength requirements. For example, patients in the early stages of stroke need gentle passive training, while those in the later stages of rehabilitation need stronger active training support. The linear torque output characteristics of the Coreless Motor enable it to accurately control the output torque, whether it is fine training with low speed and small torque, or intensive training with high speed and large torque, it can accurately match the rehabilitation needs of patients.

 

5. Lightweight structure to support portable rehabilitation equipment

As rehabilitation robots gradually develop towards home use and portability, lightweight equipment has become an important trend. Coreless motors, with their ironless, compact structure and light weight, can effectively reduce the overall weight of robots compared to traditional motors, making the equipment more portable and suitable for wearable rehabilitation equipment or home rehabilitation training, allowing patients to enjoy high-quality rehabilitation training even at home.

 

 

With the development of medical rehabilitation robots, the requirements for motor performance are also constantly increasing, and high-precision, low-energy consumption, and fast-response drive systems have become the key. In the future, Coreless Motors will continue to be optimized in terms of smaller size, higher efficiency, and more intelligent control, providing rehabilitation robots with more precise motion control and smoother operation experience, thereby improving the rehabilitation effect of patients. At the same time, the characteristics of low inertia and high sensitivity will enable rehabilitation robots to adapt flexibly in different rehabilitation stages, improving the personalization and safety of training.

 

In addition, as the market for home rehabilitation robots expands, the advantages of Coreless Motors, such as lightweight, low power consumption, and long battery life, will further promote the development of portable devices, allowing robots to operate for long periods of time in home environments and reduce patients' dependence on hospitals. In the future, combined with AI and remote rehabilitation technology, Coreless Motors will help rehabilitation robots achieve smarter interactions and more efficient training programs, making rehabilitation treatment more accurate, convenient, and popular.

 

 

As a key driving component of rehabilitation robots, the performance of coreless motors directly affects the accuracy, stability and user experience of the equipment. VSD has been deeply involved in the micro motor industry for many years, focusing on the research and development and manufacturing of coreless motors, and is committed to providing high-efficiency, low-noise, and long-life motor solutions for medical rehabilitation robots.

 

VSD Coreless Motors have the characteristics of high response speed, ultra-low inertia, precise torque control, etc., which can perfectly adapt to the needs of rehabilitation robots, making them more intelligent and personalized in training. We not only provide standardized products with multiple specifications and high performance, but also provide customized motor solutions according to customer needs, helping the rehabilitation robot industry to develop in a more accurate, efficient and convenient direction.

 

Recommended VSD Coreless Motor Models

VEC - 1628 Coreless Motor

The VEC - 1628 uses a high-precision brushless design, providing excellent low inertia and high response speed, making it an ideal choice for precision medical equipment and rehabilitation robots. Its high speed (up to 13906 rpm) and low noise characteristics ensure smooth operation of the equipment and significantly improve user experience. The motor supports customized output shafts, leads and mounting holes to meet different application requirements. The design without cogging effectively reduces vibration and energy consumption, ensuring that the equipment maintains high performance during long-term operation, making it the only choice in the field of high-end precision control.

 

VEC - 1819 Coreless Motor

VEC - 1819 has ultra-high speed (up to 38233 rpm) and excellent low inertia characteristics, making it an excellent choice for applications that require fast response and high-precision control. The non-cogging design not only ensures smooth operation, but also greatly reduces noise and improves equipment stability. Its powerful starting torque (up to 36.343 mN.m) ensures that the device still has excellent driving force under various complex load environments. It supports customized voltage, torque and speed and can be widely used in medical equipment, automation equipment and high-end robots.

 

VEC - 2855 Coreless Motor

VEC - 2855 stands out for its strong power output and high efficiency, with a maximum torque of 438.557 mN.m, suitable for industrial equipment, robots and medical devices that require high load capacity. Its low vibration and low noise design ensures smoother equipment operation, and the ball bearing structure effectively extends the life of the motor. It supports a variety of customized options, including voltage, speed, bearings and size, which can meet the precision control needs of different fields and is the best choice for high-performance applications.

 

VEC - 1657 Coreless Motor

VEC - 1657 has the advantages of high speed, high efficiency and low noise, and the maximum speed can reach 32062 rpm, widely used in medical, precision instruments and automation equipment. Its lightweight design reduces the overall weight of the equipment while ensuring low inertia characteristics, making the control more sensitive. The combination of no cogging and high-precision ball bearings achieves an excellent smooth running experience and significantly reduces energy consumption. It supports customized options such as speed, voltage, and bearings to meet various high-end application requirements.

 

VEC - 20 Series Coreless Motors

The VEC - 20 series motors are designed for high performance applications and are available in 15.4 W to 46.2 W rated power output, maximum speed up to 45680 rpm, widely used in high-speed drive fields. Built-in Hall sensor to achieve accurate position feedback, improve the stability and response speed of motor control. Lightweight design and no cogging effect make it excellent in high-end fields such as industrial automation, precision medical equipment, and intelligent robots. Support customized voltage, torque and interface configuration to meet the needs of different application scenarios.