Elmo SERVO AMPLIFIER DBP SERIES Manual De Usuario

87

DBP - Rev 6/93

Creates sinusoidal waveform signal to excite the primary of the Resolver.

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-

to-peak (ptp) value is within the range of         2V  < Vrptp < 20V. For Vr in

peak-to-peak value:

R233 = 6/(Vr - 2)          (Kohm)

For Vr in RMS value:

R233 = 6/(2.82Vr - 2)       (Kohm)

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.