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astra_conv:conversion:current_rpm:current_rpm [2014/03/13 23:25] richard |
astra_conv:conversion:current_rpm:current_rpm [2014/05/11 20:45] (current) richard |
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==== functional description ==== | ==== functional description ==== | ||
- | I have been told that when driving an electric car, reading of the current (which is nearly proportional to electric power) is more useful than a reading of the motor's rotational speed. The rev meter (the term "tachometer" might be misleading in German) was "dead" anyhow after the conversion, so I made an adapter circuit that makes it now display the current on the traction circuit. | + | I have been told that when driving an electric car, reading of the current (which is nearly proportional to electric power) is more useful than a reading of the motor's rotational speed. The rev meter (the term "tachometer" might be misleading in German) was unused anyhow after the conversion, so I made an adapter circuit that makes it now display the current on the traction circuit. |
The battery computer does measure the current with its hall sensor and displays it as a digital number, but unfortunately it has no output for this measure. So, my adapter also has to sense the current in parallel. | The battery computer does measure the current with its hall sensor and displays it as a digital number, but unfortunately it has no output for this measure. So, my adapter also has to sense the current in parallel. |