Discrete, sensorless, vector-controlled, step-motor drive design suitable for integration or customization ...
StepMaster Step-Motor Controller
a motor-sensed (sensorless) two-phase synchronous or stepping motor controller adaptable to a wide range of power amplifiers. The StepMaster uses low-cost components in a semi-discrete implementation on which more integrated circuit design can be based. Semi-discrete implementation allows greater circuit observability during design development.
StepMaster motor-drive features:
|Motor-sensed, vector control at high-speed; system microprocessor steps at low speed.|
|Digital torque command in, 9-bit current waveforms out.|
|Controls two-phase commodity step-motors.|
|Phase-winding terminal-voltage sensing for motor-sensed control.|
|Sinusoidal current drive with continuous phase sensing down to a few rpm.|
|Implemented with 2 dozen low-cost, discrete ICs in 4 ´ 5 inch board area.|
|Phase (position) feedback and "phase-locked" signals sent to controlling processor.|
StepMaster applies to
|Microcomputer-driven step-motors needing enhanced performance.|
|Digitally-commanded, motor-sensed torque control.|
|Applications where low-speed motion can be microstepped.|
StepMaster project status:
|Design implemented as functional prototype, but based on the ADI ADSP2115 and in need of design modification using a newer processor.|
Provisional project documentation (not yet a project manual) is available to "can't-wait" project participants; contact Innovatia for project information.