Characteristic curve and setpoint values
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The oscilloscope represents the voltage progression of an intact alternator. The level of the individual waves depends on the current load of the alternator. The length of the waves depends on the engine speed. The higher the engine speed the shorter the waves. At idle speed with consumer units switched on, an error-free alternator must deliver the following characteristic curve:
| Index | Explanation |
|---|---|
| 1 | Voltage |
| 2 | Characteristic curve |
| 3 | Frequency |
Observe the following target values for the alternator:
| Size | Value |
|---|---|
| Voltage range | 6 to 16 V |
| Data frequency on serial data interface BSD | 1164 to 1236 bit/s |
| Data frequency on serial data interface LIN | 19200 s |
| Maximum temperature of the stator winding | 260 °C |
| Maximum speed | 20000 rpm |
| Temperature range of controller | -40 to 140 deg C |