Overview
The Sensorless High-Speed SR Motor Control Reference Design based on the NXP® low-cost MC56F8013 digital signal controller (DSC) deals with a 2-phase switch reluctance (SR) motor sensorless drive for vacuum cleaners and other air movement applications.
- The application is a speed-open loop SR drive without any position or speed sensor needs
- Uses a sensorless control method based on current peak detection and a patented start-up algorithm (Patent No. US6448736 B1)
- The control technique allows the SR motor more than 100 000 RPM
- The application is primarily for vacuum cleaners, although it can be used for any application with a high-speed drive (50 000 RPM)
Features
High-speed 2-phase SR motor sensorless control based on a current peak detection
Designed for vacuum cleaner applications
Capable of running SR motors at more than 100.000 RPM (tested with SR motor designed for 60 000 RPM)
Single direction rotation enabled by asymmetric of 2-phase SR motor
Speed open loop
Start-up from any position using alignment and patented algorithm (Patent No. US6448736 B1)
Start-up time and maximum speed depends on SR motor parameters
- Manual interface and FreeMASTER control page for monitoring, control and tuning
Block Diagram
Design Resources