BMW i3 Inverter: Difference between revisions

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m (Clarified resolver sensor section)
Line 32: Line 32:
| 9|| 5V (OUT) ||  
| 9|| 5V (OUT) ||  
|-
|-
| 10|| RESOLVER_S2/ENCODER_A || Sin Low (blue)
| 10|| RESOLVER_S2/ENCODER_A || Sin Lo (blue)
|-
|-
| 11|| GND ||  
| 11|| GND ||  
|-
|-
| 12|| RESOLVER_S1 || Sin Hi (red)
| 12|| RESOLVER_S1 || Sin Hi (brown)
|-
|-
| 13|| THROTTLE1 ||  
| 13|| THROTTLE1 ||  
Line 42: Line 42:
| 14|| THROTTLE2 ||  
| 14|| THROTTLE2 ||  
|-
|-
| 15|| RESOLVER_R1 || Excitation Hi (yellow)
| 15|| RESOLVER_R1 || Ex Hi (yellow)
|-
|-
| 16|| RESOLVER_S3/ENCODER_B || Cos Hi (white)
| 16|| RESOLVER_S3/ENCODER_B || Cos Hi (white)
Line 50: Line 50:
| 18|| MTEMP- || (grey)
| 18|| MTEMP- || (grey)
|-
|-
| 19|| RESOLVER_S4 || Cos Low (brown)
| 19|| RESOLVER_S4 || Cos Lo (brown)
|-
|-
| 20|| EMCYSTOP_IN ||  
| 20|| EMCYSTOP_IN ||  
Line 56: Line 56:
| 21 || GND ||  
| 21 || GND ||  
|-
|-
| 22|| RESOLVER_R2 || Excitation Low (green)
| 22|| RESOLVER_R2 || Ex Lo (green)
|-
|-
| 23|| START_IN ||  
| 23|| START_IN ||  
|}
|}


''Note: colours in description column above are for motor sensor wires and currently unconfirmed. See section below on resolver wiring.''
''Note: colours in description column above are for motor sensor wires. See section below on resolver wiring.''


There are 2 variants of the i3. one with the REX and one with out.
There are 2 variants of the i3. one with the REX and one with out.
Line 287: Line 287:
12-pin PCB header to connect to the motor sensors is an ERNI MiniBridge, part number 294920
12-pin PCB header to connect to the motor sensors is an ERNI MiniBridge, part number 294920


Wire colours to pin allocation below confirmed by multimeter trace. Resolver coils confirmed by resistance, however sin vs cos and hi vs lo are not confirmed yet, provisional info below in italics, based on forum posts.
Suspected wire colours to pin allocation below determined by schematic and multimeter trace, with resolver coils and temperature sensors checked for resistance.
 
Note as of 9 November 2023 this pinout has not yet been confirmed with a spinning motor.
[[File:ERNI Minibridge Connector.jpg|thumb|ERNI Minibridge Connector. Dots indicate pin 1.]]
[[File:ERNI Minibridge Connector.jpg|thumb|ERNI Minibridge Connector. Dots indicate pin 1.]]
{| class="wikitable"
{| class="wikitable"
Line 298: Line 300:
|1
|1
|Brown
|Brown
|''Sin Hi''
|Sin Hi
| rowspan="2" |Twisted pair. 22.4 - 33.6 Ω.
| rowspan="2" |Twisted pair. 22.4 - 33.6 Ω.
|-
|-
|2
|2
|Blue
|Blue
|''Sin Lo''
|Sin Lo
|-
|-
|3
|3
|Yellow
|Yellow
|Ex ''Hi''
|Ex Hi
| rowspan="2" |Twisted pair. 22.4 - 33.6 Ω
| rowspan="2" |Twisted pair. 22.4 - 33.6 Ω
|-
|-
|4
|4
|Green
|Green
|Ex ''Lo''
|Ex Lo
|-
|-
|5
|5
|Red
|Red
|''Cos Hi''
|Cos Hi
| rowspan="2" |Twisted pair. 13.6 - 20.4 Ω
| rowspan="2" |Twisted pair. 13.6 - 20.4 Ω
|-
|-
|6
|6
|White
|White
|''Cos Lo''
|Cos Lo
|-
|-
|7
|7

Revision as of 18:59, 9 November 2023

BMW I3 inverter

BMW I3 inverter

Forum thread: https://openinverter.org/forum/viewtopic.php?p=23214#p23214

BMW i3™ inverter drop-in board Available

https://openinverter.org/shop/index.php?route=product/product&product_id=72

Pinout for Ampseal Plug
Pin No Assigniment Description
1 12V
2 BRAKE_IN
3 PRECHARGE_OUT
4 CANL
5 CANH
6 DCSW_OUT
7 FORWARD_IN
8 REVERSE_IN
9 5V (OUT)
10 RESOLVER_S2/ENCODER_A Sin Lo (blue)
11 GND
12 RESOLVER_S1 Sin Hi (brown)
13 THROTTLE1
14 THROTTLE2
15 RESOLVER_R1 Ex Hi (yellow)
16 RESOLVER_S3/ENCODER_B Cos Hi (white)
17 MTEMP+ (blue)
18 MTEMP- (grey)
19 RESOLVER_S4 Cos Lo (brown)
20 EMCYSTOP_IN
21 GND
22 RESOLVER_R2 Ex Lo (green)
23 START_IN

Note: colours in description column above are for motor sensor wires. See section below on resolver wiring.

There are 2 variants of the i3. one with the REX and one with out.

the REX variant has a additional 25kw inverter to run the onboard generator.

Power stage: Infineon FS800R07 IGBTs rated for 800amps 650v

Gate Driver Board Pin out
Pin No I/O Description Notes Pin No I/O Description Notes
1 21 GND Switching Mosfets ?
2 I 32V in 22 GND Switching Mosfets ?
3 I 32V in 23
4 I IGBT A HI 24
5 I IGBT A LOW 25
6 I CS (ADC) 26 GND IGBT Driver ground
7 I SDI 27 GND IGBT Driver ground
8 I SDO 28 GND IGBT Driver ground
9 I SCK 29 GND IGBT Driver ground
10 I IGBT B HI 30 GND IGBT Driver ground
11 I IGBT B LOW 31 GND IGBT Driver ground
12 I IGBT C HI 32 GND IGBT Driver ground
13 I IGBT C LOW 33 5V IGBT Driver Power
14 34 5V IGBT Driver Power
15 35 I IGBT PSU 12V on
16 O IGBT DRIVER UVW Upper Ready 36 O IGBT Driver Fault
17 O IGBT DRIVER UVW Lower Ready 37 I 5V LEM Current sensor Power
18 O Current Sense C Signal 38 GND Current sensor Ground
19 O Current Sense B Signal 39 GND Current sensor Ground
20 O Current Sense A Signal 40 GND Current sensor Ground


Motor Resolver & Temperature Sensors

12-pin PCB header to connect to the motor sensors is an ERNI MiniBridge, part number 294920

Suspected wire colours to pin allocation below determined by schematic and multimeter trace, with resolver coils and temperature sensors checked for resistance.

Note as of 9 November 2023 this pinout has not yet been confirmed with a spinning motor.

ERNI Minibridge Connector. Dots indicate pin 1.
Pinout for ERNI Microbridge
Pin No Colour Description Notes
1 Brown Sin Hi Twisted pair. 22.4 - 33.6 Ω.
2 Blue Sin Lo
3 Yellow Ex Hi Twisted pair. 22.4 - 33.6 Ω
4 Green Ex Lo
5 Red Cos Hi Twisted pair. 13.6 - 20.4 Ω
6 White Cos Lo
7 Blue Temperature

Sensor

From BMW Service Technical Training Manual - I01 High-voltage Components:

There are two stator coil temperature sensors.

The rotor temperature is determined using readings from the stator temperature sensors.

8 Grey
9 Red Temperature

Sensor

10 Grey
11 - Unused These wires terminate in one of the six pin connectors in the motor housing. There is nothing connected to them.
12 - Unused
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