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3. Travelling wave ring motor
Among the various piezomotor structures, the travelling-wave motor with annular stator and axial contact is currently the most technically advanced solution. This structure, which benefited from a major research effort in Japan, where it was first developed, and later in France , has been preferred in most applications leading to industrialization (see Introduction).
3.1 Motor construction
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Travelling wave ring motor
Power supply and control
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