Before entering this industry, people always thought motors were just "metal lumps with shells that spin." It wasn't until electric motors engineers got involved in the industrial field that people realized frameless torque motors, with their minimalist design, are redefining high-precision motion control. They are like the "muscle machines" of mechanics, delivering both raw power and pinpoint accuracy in full force!
Simply put, it's a direct-drive motor with its outer casing "stripped off," leaving only the rotor and stator, relying on the host equipment for protection. This is by no means cutting corners — the rotor connects directly to the drive shaft, and the stator is embedded into the machine housing. By eliminating intermediate components, it eradicates mechanical errors at the source, maximizing precision!
Traditional housed motors are like "off-the-rack clothing" — fixed sizes with installation limitations. Frameless motors, however, are "tailor-made," flexibly adapting to various irregular spaces and structures. Let the data speak: torque density can reach 2–3 times that of standard servo motors, while volume and weight can be reduced by 20%–30% at the same power level, offering unbeatable cost-effectiveness!
It's all about their "obsessively precise" performance: ultra-high positioning accuracy, extremely fast response, long lifespan, and maintenance-free operation.
They specialize in fields where "precision is life":
Industrial robot joints motors
Semiconductor manufacturing equipment
Medical imaging and surgical robots
Precision optics and measuring instruments
Frameless torque motors have high technical barriers: magnetic circuit design, material processes, and precision manufacturing are all challenges. Currently, the global market is still dominated by overseas brands in the high-end segment. However, motion control company like PJM is accelerating their catch-up, gradually mastering core technologies.
Because they perfectly align with three major trends in modern industry: precision, lightweight design, and integration. The design philosophy of "subtraction" — removing redundancy and strengthening the core — results in comprehensive improvements in precision, torque, and reliability.
You might think they only exist in factories or labs, but in reality:
✅ The chips in your phone rely on them during production.
✅ Minimally invasive surgeries and CT scans in hospitals depend on them for precise movement.
✅ Future humanoid robots and automated service scenarios will also feature them.
This "invisible power core" is quietly supporting the technological advancements in our daily lives.
