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| Calibration mode | By checking this box, the calibration mode is enabled for the current resolver. Therefore, the user can decide if the resolver's parameters are to be tuned during the simulation or if they are to be applied during the initialization phase of the model. When this box is checked, all other of the current resolver's parameters are removed from the interface's configuration and are made available as connection points. It should be pointed out that this mode (when enabled) is relying on a slower communication link between the FPGA and the CPU (use of LoadIN blocks) and thus is not meant for high-performance simulations (given that the exchange of CPU-FPGA data is done at every computation step). It is, as its name suggests, meant to be used to calibrate the resolver to work well with the equipment it is connected to. The calibrated parameters should then be applied in the interface's UI in order to be transmitted to the FPGA once, during the initialization phase of the model for all subsequent simulation executions. |
| Damping factor (Ksi) | This parameter specifies the filter's damping factor. |
| Natural frequency (w0) in Hz | This parameter specifies the filter's natural frequency. Is it expressed in Hertz. |
| Use internal carrier for demodulation | When this box is checked, the resolver will generate its own carrier for demodulation instead of using the one provided by an external device. This will also cause the Expected external carrier amplitude in V and Expected external carrier offset in V parameters to be replaced by Internal carrier delay in seconds, Internal carrier frequency in Hz, Generated carrier amplitude in V and Generated carrier offset in V. All these parameters are described below. |
| Expected external carrier amplitude in V | The expected amplitude of the carrier wave that is received during the simulation. The value should be between 0 and 16 V. A resolution of up to 0.001 V (1 mV) is permitted. This option is only visible if the Use internal carrier for demodulation box is unchecked. |
| Expected external carrier offset in V | The expected offset of the carrier wave that is received during the simulation. The value should be between -16 V and 16 V. A resolution of up to 0.001 V (1 mV) is permitted. This option is only visible if the Use internal carrier for demodulation box is unchecked. |
| Internal carrier delay in seconds | This parameter is the delay for applying the internal carrier with the resolved signals (sine and cosine). The value's range is 0 to 20e-6 (20 us). This option is only visible if the Use internal carrier for demodulation box is checked. |
| Internal carrier frequency in Hz | This parameter specifies the frequency of the internally generated carrier wave. The value should be between 0.01 and 90000 Hertz. This option is only visible if the Use internal carrier for demodulation box is checked. |
| Generated carrier amplitude in V | The internally generated carrier wave can be outputted through the channel of an analog out module. This parameter specifies the amplitude of the outputted carrier wave. The value should be between 0 and 16 V. The resolution of the value is up to 0.001 V (1 mV). This option is only visible if the Use internal carrier for demodulation box is checked. Note that there is no carrier wave outputted when the Use internal carrier for demodulation box is unchecked. |
| Generated carrier offset in V | The internally generated carrier wave can be outputted through the channel of an analog out module. This parameter specifies the offset of the outputted carrier wave. The value should be between -16 V and 16 V. The resolution of the value is up to 0.001 V (1 mV). This option is only visible if the Use internal carrier for demodulation box is checked. Note that there is no carrier wave outputted when the Use internal carrier for demodulation box is unchecked. |
| Sine amplitude in V | This parameter specifies the amplitude of the resolved sine signal. Its value should be between 0 and 16 V, with a resolution of up to 0.001 V (1 mV). |
| Sine offset in V | This parameter specifies the offset of the resolved sine signal. Its value should be between -16 V and 16 V, with a resolution of up to 0.001 V (1 mV). |
| Cosine amplitude in V | This parameter specifies the amplitude of the resolved cosine signal. Its value should be between 0 and 16 V, with a resolution of up to 0.001 V (1 mV). |
| Cosine offset in V | This parameter specifies the offset of the resolved cosine signal. Its value should be between -16 V and 16 V, with a resolution of up to 0.001 V (1 mV). |
Signals configuration
Channels in resolver input groups do not have any parameters to configure.
The table below shows how the resolver inputs translate to the physical channels of the analog input module.
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If there are any doubts about how the signals are routed, please consult the RT-XSG model used to generate the programmable bitstream file. If the model is not available, please contact Opal-RT support.
Characteristics and Limitations
For the connector pin assignments, the user should refer to the carrier documentation.
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