Forums

PSPWM

Started by gebrsa December 2, 2008
Hi guys,

I am designing a phase shifted PWM DC/DC converter for a fuel cell. I
would like to use an average current mode controller to control the
voltage out put by controlling the current using a double loop
controller. I am thinking of using an analog Phase shited PWM
controler IC for the current controller whose set point is generated
with an external current programmer with controller built with a DSP.
Do you think this is a good idea or should I use DSP for both loops?
What do you advice me?

Thanks

Use DSP for both loops, since the DSPs are strong and you save cost on analog phase shift controller IC.
On Tue, 02 Dec 2008 gebrsa wrote :
>
>Hi guys,
>
>I am designing a phase shifted PWM DC/DC converter for a fuel cell. I
>would like to use an average current mode controller to control the
>voltage out put by controlling the current using a double loop
>controller. I am thinking of using an analog Phase shited PWM
>controler IC for the current controller whose set point is generated
>with an external current programmer with controller built with a DSP.
>Do you think this is a good idea or should I use DSP for both loops?
>What do you advice me?
>
>Thanks
>
Check Freescale MC56F8037 or MC56F8323. They have been used in some digital power supply applications. Their PWM module and Timers can do the digital phase shifting.

--- On Tue, 12/2/08, sankar murmu wrote:

From: sankar murmu
Subject: Re: [motoroladsp] PSPWM
To: "gebrsa"
Cc: m...
Date: Tuesday, December 2, 2008, 9:37 PM


Use DSP for both loops, since the DSPs are strong and you save cost on analog phase shift controller IC.

On Tue, 02 Dec 2008 gebrsa wrote :
>
>Hi guys,
>
>I am designing a phase shifted PWM DC/DC converter for a fuel cell. I
>would like to use an average current mode controller to control the
>voltage out put by controlling the current using a double loop
>controller. I am thinking of using an analog Phase shited PWM
>controler IC for the current controller whose set point is generated
>with an external current programmer with controller built with a DSP.
>Do you think this is a good idea or should I use DSP for both loops?
>What do you advice me?
>
>Thanks
>