PCB Design Update for DFIG Sensor Interface

L

lavinogada

This is my final AI-credit prompt for this PCB project. Please do the maximum safe completion work in one pass.
Current project:
WRIM DFIG dSPACE Sensor Interface PCB
Current status:
  • Schematic scaling: PASS
  • ERC/passive checks: PASS
  • Placement cleanup: PASS / acceptable routing space
  • Board: 160 mm × 100 mm, 4-layer
  • Current channels: 2 × LEM LA25-NP
  • Voltage channels: 2 × LEM LV25-P
  • Op-amp: OPA4197
  • dSPACE connector: TE Connectivity 5787170-9 custom footprint currently applied as TE_5787170-9_CUSTOM.kicad_mod
  • Routing status: NOT ROUTING READY because connector pin numbering/orientation and final ADC protection still need verification
Design basis:
  • WRIM stator voltage: 380 V line-to-line nominal
  • Stator design margin: 456 V
  • Rotor voltage design level: 120 V
  • Expected current range: 4–6 A RMS
  • dSPACE analog input range: ±10 V
  • Target PCB analog output: approximately ±8.5 V maximum
  • LV25-P primary resistor chains: 100 kΩ using multiple HV resistors in series
  • LA25-NP: 4 primary turns currently selected for safer 6 Arms operation
IMPORTANT:
Do not fabricate or mark the board as fabrication-ready unless all safety-critical issues are closed.
If connector pin numbering/orientation is still uncertain, do not perform final routing. Instead, prepare the project so I can finish verification manually.
Task 1 — Custom connector footprint audit
Audit the custom TE_5787170-9_CUSTOM.kicad_mod footprint against the TE Connectivity 5787170-9 drawing as far as possible.
Check and report:
  1. 100 signal pins present
  2. 2-row geometry
  3. 1.27 mm pitch / centerline
  4. Right-angle PCB receptacle orientation
  5. Through-hole pad arrangement
  6. Boardlock / mechanical retention holes present
  7. Courtyard and keepout around connector body
  8. Pin 1 marker/silkscreen present
  9. Mating-cable direction marked
  10. Any dimensions that still require manual verification against the TE datasheet
If any of these cannot be verified, keep the connector status as:
CUSTOM FOOTPRINT — MANUAL DATASHEET VERIFICATION REQUIRED BEFORE MANUFACTURE.
Task 2 — Pinout and cable-verification discipline
Do not treat the provisional connector pin table as final.
Create a final “continuity-test required” table with:
  • TE pin number
  • PCB net
  • intended dSPACE signal
  • status: PROVISIONAL / VERIFY BY MULTIMETER / SPARE
  • test instruction
Use the current provisional mapping:
  • Pin 1: IA_OUT_ADC
  • Pin 5: AGND for IA return
  • Pin 2: I2_OUT_ADC
  • Pin 6: AGND for I2 return
  • Pin 3: VAB_OUT_ADC
  • Pin 7: AGND for VAB return
  • Pin 4: V2_OUT_ADC
  • Pin 8: AGND for V2 return
  • Pins 99–100: CHASSIS/SHIELD
  • Pins 9–98: NC/SPARE
Add a strong schematic note:
“Final J1 pin mapping must be verified by continuity test between the TE 5787170-9 cable/adapter and the actual dSPACE analog input terminals before final routing or fabrication.”
Task 3 — ADC clamp/protection selection
Select and add a final analog-output protection option if suitable.
Preferred option to evaluate:
  • Bidirectional TVS diode such as SMBJ12CA or a lower-capacitance analog-signal protection alternative if better.
  • The analog outputs are ±10 V maximum dSPACE ADC signals.
  • Protection must not significantly distort the analog measurement signal.
  • Protection should be placed close to J1.
  • Keep the existing series output resistance/protection resistance if appropriate, or recommend changes.
Please decide:
  1. Use SMBJ12CA
  2. Use BAT54S or similar rail-clamp arrangement
  3. Use a lower-capacitance ESD/TVS part
  4. Keep protection as a placeholder pending final part choice
Do not choose a part blindly. If SMBJ12CA capacitance/clamping is not ideal for analog accuracy, recommend the safer alternative and mark it clearly.
Task 4 — Final placement improvements only
Clean placement further if needed:
  • Separate HV LV25-P resistor chains from analog conditioning
  • Keep LA25-NP current paths short and away from op-amp inputs
  • Keep protection components near J1
  • Keep test points top-accessible
  • Keep AGND and CHASSIS separate unless intentionally bonded
  • Keep silkscreen readable
  • Add labels for IA, I2, VAB, V2, AGND, +15V, -15V, CHASSIS, J1 Pin 1, and cable direction
Task 5 — Conditional routing
Only route the PCB if all of the following are true:
  • TE 5787170-9 footprint geometry is sufficiently verified
  • Pin 1 and connector orientation are clear
  • Boardlock holes are included
  • ADC protection part is selected and placed
  • No safety-critical uncertainty remains except cable continuity verification
If these are not all true:
  • Do not route final traces.
  • Instead, create a “pre-routing package” with clean placement, annotated blockers, and manual verification steps.
Task 6 — Final output
Return a concise final status report with:
  1. ROUTED or NOT ROUTED
  2. FABRICATION READY or NOT FABRICATION READY
  3. Remaining blockers
  4. Connector footprint verification status
  5. Connector pinout verification status
  6. ADC protection decision
  7. DRC/ERC status
  8. Airwire status
  9. BOM issues
  10. Exact manual checks I must perform before manufacturing
If in doubt, choose safety and mark the board NOT FABRICATION READY.

flux

Final focused update completed.
  1. J1 footprint: kept as the custom TE 5787170-9 footprint and documented as provisional / must be manually verified against the TE drawing before manufacture.
  2. Pin mapping: documented the required continuity-test table for J1 pins 1–8, 99, and 100.
  3. ADC protection: added D1–D4 PESD12VL1BA-N TVS diodes from each protected ±10 V analog output to AGND near J1.
  4. Placement: cleaned placement around J1; D1–D4 are close to the protected dSPACE output pins.
  5. Silkscreen: added labels for J1 pin 1, cable/mating direction, analog output/return labels, and power/ground/chassis labels.
  6. Routing: final traces were not routed, per your instruction and because J1/cable continuity still needs manual verification.
  7. Reviews: remaining layout errors are expected airwires because the board is intentionally unrouted; no final manufacturing export was generated.
  8. BOM: updated BOM now includes 4× PESD12VL1BA-N and J1 listed with MPN 5787170-9.
  9. Fabrication status: NOT ready for fabrication yet until J1 footprint dimensions, pin 1 orientation, cable direction, and dSPACE continuity are physically verified.
  10. Documentation: I created the project file “Pre-Routing Verification Package — WRIM DFIG dSPACE Sensor Interface” with the full footprint audit, continuity table, ADC protection rationale, placement summary, and remaining blockers.
Show manual checks
Review remaining blockers
Check BOM issues
Show continuity table
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Schematic

Layout

3D View

U1 OUT - U1 IN
J4 Pin_1 - U1 IN
J6 Pin_1 - U1 +
U1 OUT - U1 IN
U1 OUT - U1 IN
U1

WRIM DFIG dSPACE Sensor Interface

WRIM DFIG dSPACE Sensor Interface thumbnail