87
Oscillator
Creates sinusoidal waveform signal to excite the primary of the Resolver.
Oscillator Frequency/Amplitude Selection (R228,R233)
The frequency (fr) and amplitude (Vr) needed to excite the Resolver are taken from the Resolver data sheet.
Selecting the frequency:
R228 = 110/fr | (Kohm) |
0.1KHz < fr (KHz) < 20KHz
Selecting the amplitude:
Pay attention that the RMS amplitude does not exceed 7Vrms or that the peak-
| R233 = 6/(Vr - 2) | (Kohm) |
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For Vr in RMS value: |
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| R233 = 6/(2.82Vr - 2) | (Kohm) |
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Reference Voltage level to R/D (R192)
In order to adjust the reference voltage input level to 2Vrms, select R192 as follows:
R192 = 50 x (Vrrms - 2) | (Kohm) |
For Vrrms <2V, install R192=100 ohm.
