Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
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of 820
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In addition, an automatic identification of the correction values is possible in ProDrive.
The current and the starting speed must be entered for this purpose - the maximum speed
during the identification is approximately factor 3.6. The evaluation is determined by a
constant current input. The present status is displayed in
Z106.72–.
4.4.6.6 Resolver synchronization
The resolver can be operated with two different excitation frequencies, 7.8125 kHz and
8
kHz. By using the 8 kHz thereby the resolver excitation can be synchronized on the
fieldbus. Additionally the phase of the resolver excitation can be set to set the resulting
sine and cosine tracks to a certain time.
Figure 88: Synchronization of the resolver
In ZFig. 88– the synchronization of the resolver is represented. Via bit 4 of parameter
Z106.43– the excitation frequency can be set to 8 kHz and activates the synchronization.
The Dsp interrupt is synchronized to the fieldbus and the resolver tracks (blue) are syn-
chronized to the first Dsp interrupt. The excitation (green) is shifted so that the maximum
of the resulting sine and cosine track is synchronous to the Dsp interrupt. The phase shift
between the Dsp interrupt and the accordant maximums are set via the parameter
Z106.52– and accepts values between 0 and 124 µs. Thereby, the excitation voltages of
the amplitude and the phase towards one another can deviate depending on the imped-
ance of the resolver.
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