Controller Power configuration

5 years 6 months ago #29529845 by Bisio
In Advanced Digital Motor Controllers User Manual I can read:
The microcomputer circuit is connected to a DC/DC converter which takes power from either the Power Control input or the VMot input.
A diode circuit that is included in most controller models, is designed to automatically select one power source over the other and lets through the source that has the highest voltage.

The diode that is used to bring power from the main battery is excluded in some high voltage controller models. For these controllers, a separate voltage source must be provided externally to the Power Control input.

I plan to use a SDC2160NS controller and I need to provide power only by the Power Control input. Is the diode of above included in my controller? If not, can I open the enclosure and disolder it manually?

Thank you!
Davide

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5 years 6 months ago #29529846 by TechSupport
This is included.

In otherwords, the two lines do not directly cross into each other. So when you are powered strictly through power control, you cannot tell the motors to spin, because it is not allowed into the vmot line path. They both go directly to the dc/dc converter which supplies all of the logic voltage to the controller, but only the vmot line path is directly connected to the output stage.

If you are connected via vmot, all logic and motor output can be used (except USB in your case due to make); where as the power control, can only control the logic side with no motor output.

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5 years 6 months ago - 5 years 6 months ago #29529847 by TechSupport
If you make any modifications to the board such as removal of parts, it will void your warranty, unless otherwise authorized by Roboteq.

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5 years 6 months ago #29529848 by Bisio
I apologize if I was not clear enough.

TechSupport wrote: This is included.

In otherwords, the two lines do not directly cross into each other. So when you are powered strictly through power control, you cannot tell the motors to spin, because it is not allowed into the vmot line path. They both go directly to the dc/dc converter which supplies all of the logic voltage to the controller, but only the vmot line path is directly connected to the output stage.

If you are connected via vmot, all logic and motor output can be used (except USB in your case due to make); where as the power control, can only control the logic side with no motor output.

In my application I need to supply the controller through both VMOT and power control lines. However the output stage must be powered only by VMOT and the electronic control circuit only by power control. This is because each power consumption added to the traction battery is penalizing.

TechSupport wrote: If you make any modifications to the board such as removal of parts, it will void your warranty, unless otherwise authorized by Roboteq.

Voiding the warranty is not a problem. I need to fit that controller for my application.

Thank you!
Davide Bisio

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5 years 6 months ago #29529849 by TechSupport
You can power both up. It is recommended that you use separate supplies for it though. You can use the same battery for the power control as the vmot, but you can run the risk of damaging the power control circuit.

the vmot voltage will take priority. If the vmot is removed, then the power control power is used.

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5 years 6 months ago #29529850 by Bisio

TechSupport wrote: The vmot voltage will take priority. If the vmot is removed, then the power control power is used.


Is there a way to exclude vmot voltage? I want that vmot voltage is applied to the motor, while power control voltage is applied to the control logic.

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5 years 6 months ago #29529852 by TechSupport
You power the separately. One battery for each. The 2 voltages do not flow directly into each other. If you take a voltmeter and apply voltage on one input, you should not see a voltage on the other input. That is the purpose of why the diode is placed on the controller (comes installed that way).

If you power directly through vmot, you have complete control of the controller regardless of whether there is power applied on the power control line. The reason for that is because they go to the dc/dc converter which controls the logic side. This cannot be excluded.

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