■ Inner Structure
■ Product Principle
A rotary motor consists of a rotor and stator. The rotor is the load itself or directly connected to the load, and is equipped with permanent magnets. The stator is fixed to the base and contains multiple coils. Based on the electromagnetic principle, energizing the coils generates a rotating magnetic field, which directly drives the permanent magnet rotor to rotate. The rotor speed is determined by the frequency of the applied current, while its position is controlled by the phase of the current.
■ Product Advantages
1. High response and high rigidity
Equipped with low-inertia rotating components and a reinforced drive system, it fully utilizes servo control performance to enhance machine dynamics. The I-PD control loop enables shorter settling time and provides high rigidity, allowing the system to withstand sudden external forces.
2. High-precision speed control
The rotary motor eliminates the need for a reducer and backlash. With a high number of motor poles, it provides minimal torque fluctuation, achieving excellent speed stability and precise velocity control.
3. Space saving
Rotary motors eliminate the need for reducers, resulting in a more compact drive system and reduced space requirements.
4. Maintenance-free operation
Rotary motors eliminate intermediate components such as reducers and belts, requiring no disassembly or regular maintenance. By directly connecting to the load, they provide a more stable power transmission system with zero backlash, high-speed, and high-precision motion performance.
5. Flexible adjustment
Without a gear mechanism, parameters can be easily adjusted through software control. Zero backlash and zero elastic deformation errors deliver a more responsive and agile system performance.
A direct drive motor mainly consists of four components: stator, rotor, bearing, and encoder. Compared with conventional bearings, a single cross roller bearing enables a thinner motor structure with higher rigidity, while supporting radial, axial, and moment loads. The direct drive motor can adjust the bearing spacing and apply preload to achieve high-precision rotation. Combined with a high-resolution encoder, it enables precise motion control. Compared with typical 8–12 pole AC servo motors, direct drive motors adopt a multi-pole structure with 20 poles or more, and high-power models can exceed 100 poles, achieving low torque ripple and high torque output. Direct drive motors are widely used in semiconductor and electronics manufacturing, precision CNC machine tools, industrial automation and robotics, new energy, and photovoltaic manufacturing, providing a high cost-performance solution for industrial automation upgrades.

