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ltg
Joined: 24 Feb 2002
Posts: 75
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 18 Sep 2003 7:30 uC or DSP for induction motor control, what is best? |
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Hi,
I tried to use a microcontroller to control a induction motor with 1 phase in and three phases out. And I tried to use space vector pwm methode to control the motor, because it is more effeciently. To use space vector pwm methode it requires a microcontroller with center aligned pwm. The traditionally uC are edge aligned pwm. So in my case I need to choice an another uC or DSP. But there are a lot to choice. Could you please recommend me what to choice? uC or DSP and what manufactures? Thanks in advance!
Best Regards,
ltg
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MADURAN
Joined: 01 Jan 1970
Posts: 65
Helped: 2
Location: Romania
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| 18 Sep 2003 8:17 Re: uC or DSP for induction motor control, what is best? |
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| You can try TMS320F241 (PLCC 68 pins) or ADMCF341 (ANALOG DEVICES). I tried the second solution (ADMCF341) and the results were as I expect - the inverter works perfect.
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petarpav
Joined: 25 Mar 2002
Posts: 557
Helped: 8
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| 18 Sep 2003 8:36 Re: uC or DSP for induction motor control, what is best? |
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Motorola DSP56F801 thru DSP56F807 is the best for motion control.
They offer SDK for all peripheral on DSP, and source code for control different motors.
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ramesh
Joined: 19 Jan 2003
Posts: 1234
Helped: 4
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| 18 Sep 2003 8:53 Re: uC or DSP for induction motor control, what is best? |
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| Try ADSP-21992 (ANALOG DEVICES)
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bunalmis
Joined: 03 Jan 2003
Posts: 251
Helped: 4
Location: Turkey
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| 18 Sep 2003 13:20 Re: uC or DSP for induction motor control, what is best? |
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You can use a controller,If you need only simple induction motor control.
But you need fast controller or DSP if you want to add some specific control algorithm.
80196 motor control and TMS32024XX family are good choise.
if you dont want to change your hardware at the future, you must
select the DSP instead of controller.
If you use DSP, You can add or remove the modified software without
changing the servo speed. Slow controller may be poblem at the futures.
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ash
Joined: 25 Dec 2002
Posts: 160
Location: Europe
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| 18 Sep 2003 23:11 Re: uC or DSP for induction motor control, what is best? |
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Hi ltg,
You should use a microcontroller per pwm channel, if there're 3 phases you should use 3 microprocessor as pwm controller and another chip as main processor(it could be uC or dsp). If you try to control both software pwm and motion control algorithms in one micro, the micro will be mad!
Regards.
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ltg
Joined: 24 Feb 2002
Posts: 75
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| 21 Sep 2003 12:43 |
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Hi,
Thanks very much for your suggestions!
ash:
Your suggestion is very interesting but isn't it hard to make software to control uC? 3 phases it means 6 pwm channels which means 6 microcontrollers. Would you please explain more deeper for me? Thanks in advance!
Best Regards,
ltg
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