2415271_en-US

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MCSPTR2AK396 — resolver excitation limits?

Hello! I'm working with the MCSPTR2AK396 development kit (S32K396, 3-phase PMSM with resolver, 3-shunt FOC). I'm using the stock resolver-to-digital chain: SGEN → SDADC → DSPSS → eTPU RESOLVER function.

As far as I understand, the stock excitation frequency is 10 kHz (SGEN sine wave driving the resolver excitation winding), and the eTPU RESOLVER processes angle updates every 50 µs with a 16+16 sample buffer from SDADC, with a slow PI regulator adjusting the excitation phase shift. But I have a questions.

What is the exact resolver model used in the MCSPTR2AK396 kit? A datasheet reference would be very helpful.

What is the maximum excitation frequency this resolver ? Can SGEN be raised, for example, to 100 kHz without modifying anything except SGEN registers? Or does the SDADC/DSPSS/eTPU chain, or the analog sin/cos filters, impose a hard limit well below that?

What is the minimum excitation frequency allowed by the resolver itself, and what is the recommended range?

If higher excitation is possible, what else must be reconfigured — SDADC sampling rate, DMA buffer transfer, eTPU HSR rate, excitation phase-shift regulator gains, analog filters?

Thank you.

Re: MCSPTR2AK396 — resolver excitation limits?

Hello,

What is the exact resolver model used in the MCSPTR2AK396 kit?

On the TG Drives motor manufacturer's website, there is a configurator that lists three possible resolver options: ER5Kd411, TS2620N21E11, and RE-15-1-A15.

If I remember correctly requested was lowest-cost resolver option, which was the ER5Kd411 from ATAS Náchod.

https://www.atas.cz/files/ER5Kd.pdf

The exact type could be determined by opening the rear cover.

The MCSPTR2AK396 resolver solution is designed and validated at 10 kHz excitation. While SGEN supports frequencies up to 50 kHz according to the application note, operation above 10 kHz requires reconfiguration and validation of the SDADC, DSPSS, DMA, eTPU resolver processing and analog signal-conditioning chain. In addition, for resolvers such as TS2620N21E11 we only found a published nominal excitation specification of 7 Vrms at 10 kHz; no supported excitation-frequency range is specified in the available resolver datasheet. Therefore, operation at 100 kHz cannot be recommended based on available documentation.

Best regards,

Peter