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Re: Part III: Hardware & Software Sharing Responsibilities
GBoos   5/23/2012 2:52:04 PM
I had a problem when changing from one generation of Microcontrollers to the next. It has a Hardware Module to generate a PWM to control a Power Inverter. This hardware should have been the same in both Generation of chips. That was the statement of the Manufacturer.

In the Frequency Inverter in a Range from 1.5kW to 15kW the change ot the new processor worked fine.

In the next bigger one (22kW) every time you switched on Power the current and temperatdireure Measurement fails. It has been directly destroyed.

After a few weeks we found that if you configure the new µContoller like the old one, the default sates of the PWM outputs are inverted.

This causes to switch all IGBTs in the power inverter on to the same time.

In the smaller Units the hardware to drive the IGBTs prevents this, in the bigger one you could do it.


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