Position sensing encoder assembly for driving system of permanent-magnet synchronous motor

The utility model discloses a position sensing encoder assembly for the driving system of a permanent-magnet synchronous motor (PMSM), which comprises a photoelectric encoder. The photoelectric encoder comprises a support, a PCB fixedly arranged on the support, a reading head fixedly arranged on the top layer of the PCB, and a photoelectric encoding disc fixedly arranged on the rotating shaft of the PMSM. The position sensing encoder assembly is characterized in that the assembly additionally comprises a Hall sensor and the Hall sensor consists of a magnet ring which is fixedly arranged on the rotating shaft of the PMSM, and three Hall elements which are distributed around the magnet ring at intervals of 120 degrees and are fixedly arranged on the bottom layer of the PCB. Compared with the prior art, the utility model has the advantages that the structural design is reasonable, the installation and the debugging are convenient, the reliability is high, the production cost of the encoder of the driving system