Not applicable
Nov 06, 2013
04:03 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Nov 06, 2013
04:03 AM
Hi,
enabling the Speed Ref Potentiometer in the DAVE Apps (PMSMFOCSL01/02) adds 3 ADC channels.
This is also documented in the multiple Application Kit Apps Documentations:
"By enabling POT measurement, 3 ADC channels are added automatically:
Channel A - Average current measurement
Channel B - DC link voltage measurement
Channel C - Potentiometer measurement"
What the Pot does is basiclly setting the Endspeed Reference.
In the single-shunt examples with PMSMFOCSL01 this makes sense.
In the 2/3 shunt app PMSMFOCSL02 there is no (average) link current necessary, but checking "Speed Ref via Pot" adds 3 ADCs too!
My question is: Is the DC-link current ADC necessary for the control algorithm in 2/3 shunt Configuration?
In applications with 2/3 shunts, this signal is not available. And I don't see where or if this signal is used in the code.
Best regards
S. Moench
enabling the Speed Ref Potentiometer in the DAVE Apps (PMSMFOCSL01/02) adds 3 ADC channels.
This is also documented in the multiple Application Kit Apps Documentations:
"By enabling POT measurement, 3 ADC channels are added automatically:
Channel A - Average current measurement
Channel B - DC link voltage measurement
Channel C - Potentiometer measurement"
What the Pot does is basiclly setting the Endspeed Reference.
In the single-shunt examples with PMSMFOCSL01 this makes sense.
In the 2/3 shunt app PMSMFOCSL02 there is no (average) link current necessary, but checking "Speed Ref via Pot" adds 3 ADCs too!
My question is: Is the DC-link current ADC necessary for the control algorithm in 2/3 shunt Configuration?
In applications with 2/3 shunts, this signal is not available. And I don't see where or if this signal is used in the code.
Best regards
S. Moench
- Tags:
- IFX
2 Replies
Nov 07, 2013
06:31 PM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Nov 07, 2013
06:31 PM
Hi,
The PMSMFOCSL02 (two/three shunt app) does not required the DC-link current.
Yes... The allocation of the resource is not nice... Sometime, it required some additional resource/IO pin which is not necessary.
1. Default (2 shunt)
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
2. When you change from default to 3 Phase current measurement
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
3. When you change from default to 2 Phase current measurement with "Speed Ref via POT"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement) -> assigned but not used
Channel D - ADCCH001/3 (DC link voltage measurement) -> assigned but not used if "SVM compensated not enabled"
Channel E - ADCCH001/4 (Potentiometer measurement)
4. When you change from default to 3 Phase current measurement with "Speed Ref via POT"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
Channel D - ADCCH001/3 (DC link voltage measurement) -> assigned but not used if "SVM compensated not enabled"
Channel E - ADCCH001/4 (Potentiometer measurement)
5. When you change from default to 3 Phase current measurement with "Speed Ref via POT" and "SVM compensated"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
Channel D - ADCCH001/3 (DC link voltage measurement)
Channel E - ADCCH001/4 (Potentiometer measurement)
The PMSMFOCSL02 (two/three shunt app) does not required the DC-link current.
Yes... The allocation of the resource is not nice... Sometime, it required some additional resource/IO pin which is not necessary.
1. Default (2 shunt)
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
2. When you change from default to 3 Phase current measurement
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
3. When you change from default to 2 Phase current measurement with "Speed Ref via POT"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement) -> assigned but not used
Channel D - ADCCH001/3 (DC link voltage measurement) -> assigned but not used if "SVM compensated not enabled"
Channel E - ADCCH001/4 (Potentiometer measurement)
4. When you change from default to 3 Phase current measurement with "Speed Ref via POT"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
Channel D - ADCCH001/3 (DC link voltage measurement) -> assigned but not used if "SVM compensated not enabled"
Channel E - ADCCH001/4 (Potentiometer measurement)
5. When you change from default to 3 Phase current measurement with "Speed Ref via POT" and "SVM compensated"
Channel A - ADCCH001/0 (Phase-U current measurement)
Channel B - ADCCH001/1 (Phase-V current measurement)
Channel C - ADCCH001/2 (Phase-W current measurement)
Channel D - ADCCH001/3 (DC link voltage measurement)
Channel E - ADCCH001/4 (Potentiometer measurement)
Not applicable
Nov 08, 2013
02:27 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Nov 08, 2013
02:27 AM
Hi,
thank you for your prompt replay. Your information is a good addition to the documentation and Dave.
S. Moench
thank you for your prompt replay. Your information is a good addition to the documentation and Dave.
S. Moench