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An ultrasonic motor (USM) is a novel type of micro‑special motor that operates on the principle of the inverse piezoelectric effect in piezoelectric materials. It induces minute vibrations in an elastic stator within the ultrasonic frequency range and, through friction between the stator and rotor (or armature), converts these vibrations into rotational or linear motion of the rotor, thereby delivering output power to drive a load. Compared with conventional electromagnetic motors, ultrasonic motors offer the following advantages:

(1) Compact structure, flexible design, and high torque density (torque-to-mass ratio);

(2) No gear reduction mechanism is required, enabling low-speed operation with high torque.

(3) Ultra-fast response (millisecond-level);

(4) The rotational speed exhibits exceptionally high stability.

(5) Ultra-high precision, with high positional resolution (at the arcsecond level) ≤ 1″;

(6) Ultrasonic motors have no magnetic poles and no windings, offering superior electromagnetic compatibility compared to conventional motors.

(7) Power-off self-locking, with a high holding torque.

(8) Low noise level (100 mm < 45 dB);

(9) Can operate under extreme conditions such as vacuum, high temperature, and low temperature;

(10) Features ultra-low-speed operation, with stepless speed regulation ranging down to an extremely slow speed of 1 r/day.

(11) Can withstand ultra-high overload, >10,000 g;

Experts predict that the 21st century will be an era of dazzling advancement for ultrasonic motors, which can be widely deployed in mechanisms requiring direct drive—such as office automation equipment, factory automation systems, cameras, camcorders, industrial robots, automobiles, and household appliances. They may even partially replace conventional micro‑motors. It is foreseeable that, to support the development of China’s satellites, missiles, rockets, aircraft, robots, micro‑machinery, automobiles, and precision instruments in the 21st century, a substantial demand for high‑performance ultrasonic motors will arise. The continued progress of ultrasonic motor technology is sure to provide significant impetus to both China’s defense‑related and civilian sectors.

Nanjing Hangda Supercontrol Technology Co., Ltd., backed by a highly skilled R&D and management team brimming with talent, is confident that its independently developed ultrasonic motors hold vast application potential in China and are poised for industrialization. The company focuses on every stage of the ultrasonic motor value chain—R&D, manufacturing, testing, and sales—committed to scaling up and strengthening the ultrasonic motor industry while continuously advancing China’s automation technology. Currently, the company has achieved a solid foothold, with stable product quality and superior performance that surpasses comparable foreign products. To expand sales, increase awareness and adoption of ultrasonic motors among enterprises, and extend their societal benefits, thereby positioning Chinese innovation at the forefront globally, the company is now recruiting partners nationwide.

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