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direct digital design controller für buck DC/DC |
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Verfasst am: 05.06.2013, 10:12
Titel: direct digital design controller für buck DC/DC
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Hi,
i am writing a thesis with the topic: digital controller for buck
I read some reports mentions method called direct digital design.
I have a few questions:
- If the switch frequency is 500kHz, is it appropriate to have the digital system work with 500kHz as well ?
- To model the plant and the ADC, should i insert one delay link to the ADC ?
- I am planning to do my work with FPGA and digital PWM. Should i put one delay link between the controller and digital PWM ?
(The output of controller is normally with some asynchronous arithmetic calculation add, multiply, ..
So the extra delay link is to re-synch the output of controller with the input of digital PWM )
- As the result, there are two extra delay links in my model of the digital plant (one at the ADC, and one at the digital PWM)?
Thank you for your time
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