RE: [CAD_CAM_EDM_DRO] Building your own PM AC servo driver? (was: AC Servo Motors and Drives)

Can be done and I have done this on my job using a PMD chip based design:
http://www.dynamicdevices.com/DynamicD/docs/WARP1.pdf . Took about six
months to finish the analog, digital, programming and packaging along with
all the support documents for manufacturing. You need good equipment (scopes
etc) and a fairly decent budget for prototyping and expect to put in a lot
of reading if you have not done this before. If this is not a commercial
venture I would suggest an off-the-shelf buy unless you want to learn the
art and science of designing three phase motor controllers and amplifiers.
Madhu

>-----Original Message-----
>From: bitnick78 [mailto:arvidpublic@...]
>Has anyone here tried to build their own drive for a Permanent Magnet
>AC servo motor? There are several microcontrollers and DSP chips out
>there with multiple PWM channel outputs. Texas Instruments, Motorola
>and Analog Devices all make dedicated DSPs with built in encoder
>inputs, six PWM channels, A/D channels for measuring current in the
>windings etc. I can buy single pieces (a TI one, the TMS320LF2407A),
>at my local electronics shop for about $25.
> TI also has several application notes on the subject, for
>example "SPRA588 - Implementation of a Speed Field Oriented Control
>of 3-phase PMSM Motor using TMS320F240". Field Oriented Control (FOC)
>seems to be the latest in servo drives, and gives very precise
>control over the motor.
>
>Any thoughts about this?
>
>// Arvid Brodin
>