Overview
This reference design showcases how the NXP® MC56F84789 digital signal controller (DSC) operates two motors and interleaved PFC in a single MCU.
- Sensorless algorithms eliminate expensive position sensors
- The compressor and fan employ 3-phase Permanent Magnet Synchronous Motors (PMSMs), which provide a quieter, more efficient, flexible and reliable operation
- Implemented with a back EMF observer, based on NXP Embedded Software Motor Control Libraries and specifically tailored for air conditioning fans and compressors
- The demo also provides the communication to a Kinetis® K70 MCU touch graphic LCD for added HMI experience
Features
- Sensorless control of two PMSMs using Back-EMF observer
- Interleaved PFC control
- Power stage with processor daughter card
- Supply voltage 90 - 240 V AC, 40-70 Hz
- Compressor control 1200 - 4500 RPM
- Fan control 500 - 2000 RPM
- Rotor alignment method used
- Over-current protection and over-voltage protection
- Hot and cold side temperature control
- RS232 communication with remote graphic-touch LCD control
