If anyone has a hankering to roll their own 3 phase AC motor 
controller the MC3PHAC would be worth knowing about.

3 phase motor controller mcu.
Full code for running a stand alone AC motor controller is available 
free.

Overview page

        http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC3PHAC&nodeId=01098400786959705928692818701EA01E6

Source code available for complete 3 phase open loop induction motor 
controller
Registration required. Painless.

________
    "The MC3PHAC is a high-performance monolithic intelligent motor 
controller designed specifically to meet the requirements for 
low-cost, variable-speed, 3-phase ac motor control systems. The device 
is adaptable and configurable, based on its environment. It contains 
all of the active functions required to implement the control portion 
of an open loop, 3-phase ac motor drive.

One of the unique aspects of this device is that although it is 
adaptable and configurable based on its environment, it does not 
require any software development. This makes the MC3PHAC a perfect fit 
for customer applications requiring ac motor control but with limited 
or no software resources available."



a.. Volts-per-Hertz speed control
a.. Digital signal processing (DSP) filtering to enhance speed 
stability
a.. 32-bit calculations for high-precision operation
a.. Internet enabled
a.. No user software development required for operation
a.. 6-output pulse-width modulator (PWM)
a.. 3-phase waveform generation
a.. 4-channel analog-to-digital converter (ADC)
a.. User configurable for standalone or hosted operation
a.. Dynamic bus ripple cancellation


It's hard to believe that ANYTHING would have 8 presets on it these 
days :-)

        http://www.freescale.com/files/graphic/product_motorola/MC3PHACimage.jpg

To be fair, they are motor control parameters which allows field 
tuning without needing access to a PC.


Reference design

        http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RDMC3PHAC&parentCode=MC3PHAC&nodeId=02nQXGrrlPglzQMszYj6MJ

Designer reference manual
108 pages

        http://www.freescale.com/files/microcontrollers/doc/ref_manual/DRM006.pdf



        RM


 

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