1375

In order to use the resolver to obtain the rotor position information of the motor, there are many dedicated decoding chips and soft decoding methods on the market. In order to measure the decoding accuracy of the decoding chip, a 20-bit high-precision absolute value encoder and resolver are installed on the rotor of the motor, and a measurement system is designed to measure the error of the decoder through the high-precision absolute value. First, the working principle of the resolver, the working principle of the AD2S1205 and the peripheral circuit are systematically introduced. The TMS320F28335 is used to analyze the rotor position. Finally, the coaxial high-precision absolute encoder is used to analyze the error of the AD2S1205 decoding result. Experimental results show that the rotor position error analyzed by the AD2S1205 is within the electrical error of the resolver, and the decoding accuracy is high.