Table 1 Performance measures of stators
From: Characterization of bulk piezoelectric element-based ultrasonic motors
Stator type | Quality factor \(Q_m\) | Coupling coefficient k % | i-v ratio \(A_{iv}\) As/m |
|---|---|---|---|
Cubic bulk | 1524 | 6.52 | 0.0130 |
Cylindrical bulk | 1134 | 6.03 | 0.0145 |
Cubic bronze | 465 | 7.63 | 0.0201 |