Magnetic Rotary Encoder and Its Application in PMSM
Xuefeng Zhang · Electric Drive · 2008
A magnetic rotary encoder used as PMSM angle sensor was introduced.A intended method based on back-EMF information is used to decide the relationship between encoder output and rotor position was described in detail.The advantage of the proposed scheme is that there is no need to adjust the encoder after installing and the installing process of the encoder as PMSM position sensor is simple.Moreover,experimental result illustrate that motor controller can get the accurate initial rotor position when motor begin to rotate.The test result shows that using the magnetic rotary encoder,high resolution rotor position can be achieved.