Texas Instruments C2000

Why Digital Control Techniques?
Controller
Analog
or
Digital ??
PWM
Sensor(s)
 Bandwidth limitations (sampling loop)
 PWM frequency and resolution limits
 Numerical problems (quantization, rounding,…)
 AD / DA boundary (resolution, speed, cost)
 CPU performance limitations
 Bias supplies, interface requirements
 Component drift and aging / unstable
 Component tolerances
 Hardwired / not flexible
 Limited to classical control theory only
 Large parts count for complex systems
 Insensitive to environment (temp, drift,…)
 High reliability
 S/w programmable / flexible solution
 Precise / predictable behavior
 Advanced control possible (non-linear, multi-variable)
 Can perform multiple loops and “other” functions
 High bandwidth
 High resolution
 Easy to understand / use
 Historically lower cost
+
Digital ControllerAnalog Controller
Power Elec.