User`s manual

SECTION 5: DS2100 FUNCTIONAL OVERVIEW DS2100 User's Manual
C27750-001 PAGE - 5-19 -
5.5.1.2 Resolver transformer turns ratio
The resolver transformer turns ratio determines the required amplitude for the resolver reference output from the
DS2100. This figure is normally quoted in the resolver data sheet. For standard motors in the motor database this
parameter is configured as part of the motor parameter download. Failure to set the parameter
resolver_transformer_ratio
(index 0x2171, subindex 5) correctly may result in a resolver fault being detected.
5.5.1.3 Resolver reference amplitude
The parameter resolver_amplitude
(index 0x2200, subindex 4) is the resolver reference amplitude determined from
the resolver transformer turns ratio.
5.5.1.4 Resolver commutation position
The parameter resolver_position_(raw)
(index 0x6510, subindex 4) contains the electrical angle of the resolver.
Depending on the pole count of the resolver this value is proportional to the mechanical angle. The scaling is 16-bit
full scale change over one electrical cycle of the Sine or Cosine signals. For example a change of 65536 in
resolver_position corresponds to 360 degrees mechanical for a 2 pole resolver.
5.5.1.5 Resolver position
The parameter resolver_position_(multi-turn)
(index 0x2421, subindex 18) contains a multi-turn version of the
resolver commutation position, used in the position loop feedback. The multi-turn resolver position is created by
counting the resolver commutation position rollovers.