[Emc-users] FCM8201,2 and IRAMS
Has anyone used one of these: http://www.fairchildsemi.com/ds/FC/FCM8201.pdf and/or: http://www.irf.com/product-info/datasheets/data/irams06up60b.pdf -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] FCM8201,2 and IRAMS
Kirk Wallace wrote: Has anyone used one of these: http://www.fairchildsemi.com/ds/FC/FCM8201.pdf OH MY! Under $4 at Digi-Key. This looks like it might make a fairly simple way to drive a motor in sinusoidal mode, with a PWM signal providing a torque command. Quite a FIND, thanks! On the other hand, the data sheet is REALLY sparse about how the thing really works in stand alone mode, how the PWM input really controls the output pulse widths, etc. I wonder if there is another document that details how the chip really works? Jon -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] FCM8201,2 and IRAMS
I don't think you can use the Fairchild part to drive a servo motor with sinusoidal commutation, because it uses a PLL to compute the phase angle. This implies they expect it to be continually running, and not changing direction. Neil On Tue, Jan 18, 2011 at 7:22 PM, Jon Elson el...@pico-systems.com wrote: Kirk Wallace wrote: Has anyone used one of these: http://www.fairchildsemi.com/ds/FC/FCM8201.pdf OH MY! Under $4 at Digi-Key. This looks like it might make a fairly simple way to drive a motor in sinusoidal mode, with a PWM signal providing a torque command. Quite a FIND, thanks! On the other hand, the data sheet is REALLY sparse about how the thing really works in stand alone mode, how the PWM input really controls the output pulse widths, etc. I wonder if there is another document that details how the chip really works? Jon -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- http://www.pixpopuli.com -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] FCM8201,2 and IRAMS
Neil Baylis wrote: I don't think you can use the Fairchild part to drive a servo motor with sinusoidal commutation, because it uses a PLL to compute the phase angle. This implies they expect it to be continually running, and not changing direction. Yes, yes! I meant to comment on this, also. The PLL would kind of break down at very low speeds, since it has no encoder input, when the Hall signals come to a stop, it would pretty much have to turn into a six-step drive. But, maybe it would be smooth enough at really low speeds that it wouldn't be a problem there, either. Jon -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
