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7
4.
Generator
GPU is available in brushed or brushless versions. In the brushed GPU version, the brushed generator’s voltage output
must be within 13-50 V range. If the voltage out is below 13 V, GPU will automatically switch to battery source.
In the brushless GPU version, the 3-phase rectifier is used between the generator and the internal DC-DC converter of
the GPU (refer to Figure 5). Therefore DC voltage at the DC-DC converter is equal to rectified value of generator’s AC
voltage. In this case generator’s line voltage RMS value must be within 10 - 35V range. Line voltage RMS value can be
measured between any two leads of the generator. If the voltage out is below 10 V, GPU will automatically switch to
battery source
G
GPU
Brushed
generator
DC-DC
converter
J2
connector
Figure 4 Brushed generator and GPU internal connection
G
GPU
Brushless
generator
DC-DC
converter
J2
connector
a
b
c
Figure 5 Brushless generator and GPU internal connection
