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Signal input level (R193,R194)
The R/D inputs (Vinrms) are adjusted to the sin/cos. Resolver outputs by:
Resolver output = Vinrms = Vrrms x Transformation ratio
| R193 = R194 = Vinrms - 2 - Rstator | (Kohm) |
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(Rstator in Kohm). |
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When Vinrms<2V, install R193=R194=100 ohm. |
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The | standard R/D converter will not operate | for Vin rms<1.8V. Consult factory |
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for | OEM applications. |
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Velocity Signal
The tracking converter technique generates an internal signal at the output of the integrator that is proportional to the rate of change of the input angle. This dc analog output (velocity signal) is buffered and represented at terminal
This velocity signal can be internally connected to the summing junction of the error amplifier by inserting R7 - see Appendix B for more details. However, the standard procedure does not require closing the velocity loop.
Select maximum actual velocity of the application and calculate the maximum tracking rate T of the Resolver as follows:
T = rpm x Q / 120
T unit is rps: Resolver electrical revolution per second
Q - number of poles of Resolver ;
rpm - mechanical revolution per minute.
Selecting the Resolution
The resolution can be selected to be 10,12,14 or 16 bits by use of DIP switches 13 and 14. When selecting the resolution the rps limits should not be exceeded:
