The Nissan EM57 motor has been used on several different cars over the years. It sits at the bottom of the Nissan Leaf drive stack and is paired with the Nissan Leaf traction inverter above it.
Mechanical interface
Mounting flange
Coming soon…
Output axle
Coming soon… There are some interesting coupler alternatives available:
Electrical interface
Phase busbars
Coming soon…
Resolver connector
The resolver output is an 8-pin Yazaki RH connector.
| Part | Motor (Male) | Wire Harness (Female) |
|---|---|---|
| Housing | 7282-8855-30 | 7283-8855-30 |
| Terminal | 7114-4415-02 / 7114-4416-02 / 7114-4417-02 (and -08 variants) | 7116-4415-02 / 7116-4416-02 / 7116-4417-02 (and -08 variants) |
| Wire seal | 7158-3165-90 / 7158-3166-60 / 7158-3167-80 / 7158-3168-80 | same |
Pinout:
| Pin | Name | Description |
|---|---|---|
| 1 | Temp | Temperature sensor |
| 2 | Temp | Temperature sensor |
| 3 | Ex | Resolver excitation coil |
| 4 | Sin + | Positive sine output |
| 5 | Sin − | Negative sine output |
| 6 | Cos − | Negative cosine output |
| 7 | Cos + | Positive cosine output |
| 8 | Ex | Resolver excitation coil |
Important
The resolver calibration is stamped on the motor housing and must be written to the traction inverter after replacing the motor or resolver. See the YouTube reference below.
Cooling
The motor needs coolant flowing through the cooling circuit. More info TBD.
References
- OpenInverter project: Nissan Leaf Motors wiki.
- Nissan Leaf resolver write: YouTube walkthrough.