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Originally Posted by BenB
Joe Johnson explained why it doesn't matter if motor speeds match in this post. |
To be clear: Joe did not say "it doesn't matter". He said:
Quote:
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The question of whether to put multiple motors in parallel is not a simple one to answer. ... I don't not agree with those who say that you must always match free speeds of the motor
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There are times when you do want to match free speeds. It depends on the application and the expected operating conditions.
Here's a simple chart which shows the difference between running a CIM and a mini 1:1 vs running them with matched free speeds. Column H "relative heat" shows the mini's heat generation
relative to the CIM. It's an indication of how "hard" the mini is working relative to the CIM. The mini is smaller than the CIM and cannot be expected to sustain the same rate of heat dissipation as the CIM.
Does anyone have any data on the relative heat dissipation capability of the mini compared to the CIM?