Re: 4Q Motor control paradox


Genome wrote:
"Roger" <irwin@xxxxxx> wrote in message
news:1149608409.515928.281430@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Consider a 4Q motor control with a H bridge driver.

[snip wordy bollocks]

Were you bored with your day to the extent that you had to make that up.

The energy goes back into the supply, if the supply can't deal with it it
goes 'bang'.

DNA

Well if you made a mess of the punctuation, I clearly made a mess of
the question ;-)

For the record, as you probably know, regenerative drives which cannot
absorb current have resistors that can be switched onto the DC link and
do not go bang. This was what I was meaning by conventional wisdom.

The **question** is why things don't work like the space rocket
analogy. The space rocket is 'braked' by applying a force in the
opposite direction. Passing current througth a motor armature in the
opposite direction also creates force. So where is the difference
between the two analogies?

.

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