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Hello,
Is it Possible to control Traction Inverter And Compressor Motor with Single Controller with ASIL D Level(Both PMSM motors)?
Share any related documents for reference.
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Hi Narayana. The answer is far more complicated than a simple "yes". I would consider the following:
- Motor control generally takes just a fraction of the AURIX bandwidth, so supporting two is easily possible. I would consider freedom from interference and availability. Does a fault in handling one motor lead to a fault in the other? Is it okay if an overall microcontroller fault (uncorrectable RAM error, etc.) leads to shutting both motors down while the system recovers?
- For two independent, safety-critical sets of outputs, you'd need to choose the I/O pins very carefully, to avoid as many package-related common cause failures as possible.
- The microcontroller is just a small part of system safety argumentation, but its safety documentation is likely the longest because of the vast number of transistors and associated safety mechanisms. A wise customer once told me the microcontroller was 10% of the overall FIT budget for an ECU.
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Hello @Narayana
Please look into the following for information on AURIX processors that may be suitable for your purpose:
You may find the documents in the product page under documents menu.
Regards
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Any Application reference Data (With two PMSM Motor Applications)?
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Hi Rupak,
Any Functional Safety issues will be there if we use the same controller for both PMSM motors.
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Hi Narayana. The answer is far more complicated than a simple "yes". I would consider the following:
- Motor control generally takes just a fraction of the AURIX bandwidth, so supporting two is easily possible. I would consider freedom from interference and availability. Does a fault in handling one motor lead to a fault in the other? Is it okay if an overall microcontroller fault (uncorrectable RAM error, etc.) leads to shutting both motors down while the system recovers?
- For two independent, safety-critical sets of outputs, you'd need to choose the I/O pins very carefully, to avoid as many package-related common cause failures as possible.
- The microcontroller is just a small part of system safety argumentation, but its safety documentation is likely the longest because of the vast number of transistors and associated safety mechanisms. A wise customer once told me the microcontroller was 10% of the overall FIT budget for an ECU.