Re: Mixing Jaguars and Victors
Quote:
Originally Posted by Al Skierkiewicz
(Post 962826)
In the case of the series wired motors, the current is theoretically the same in each motor. However, the production variations in inexpensive motors will affect the output power vs input current. The result is that the power output of the transmission is never fully shared by each of the motors. One is always providing more power than the other.
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I think everyone agrees with this.
Quote:
Originally Posted by Al Skierkiewicz
(Post 962826)
As to differences in linearity, the two motors are coupled and the result would be a combined speed slower than expected.
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That depends on what you are "expecting". If you are closing the loop on speed, you'll get the speed you expect.
If you are running open loop, you will get the speed you expect, if you take each controller's performance into account in the calculation.
Quote:
Originally Posted by Al Skierkiewicz
(Post 962826)
I believe the Victor supplied motor will be contributing the majority of the power below about 75% throttle.
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Unless you correct for this in software, as Nick suggested in his earlier post:
http://www.chiefdelphi.com/forums/sh...7&postcount=14,
Quote:
Originally Posted by Al Skierkiewicz
(Post 962826)
One little item no one has mentioned here is the switching frequency of the individual controllers. The Victor is 150 Hz while the Jaguar is 15 kHz. At 50% throttle the Jaguar would switch an additional 50 times during the period that the Victor is turned off. Although the motors are linked and there would certainly be some flywheel action provided by the transmission and coupled mechanism, I would suspect this would be bad for the Jaguar.
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It will have no effect on the Jaguar at all.
The electrical and mechanical dynamic response through the path from the Victor's output, to CIM#1, through the toughbox, into CIM#2, and back out CIM#2's power leads to the Jag is so highly attenuated at 150Hz that the Jag will not even see it.
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