Table 4 Comparison of NPI with manual and ESC control.
Standoff distance | 18Â mm | 20Â mm | 22Â mm | |||
|---|---|---|---|---|---|---|
Performance | NPI | NPI | NPI | |||
Frequency (kHz) | Manual | ESC | Manual | ESC | Manual | ESC |
16 | 0.8 | 0.96 | 0.84 | 0.99 | 0.82 | 0.97 |
18 | 0.82 | 0.97 | 0.85 | 1 | 0.83 | 0.99 |
20 | 0.79 | 0.95 | 0.83 | 0.98 | 0.82 | 0.97 |
