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This paper presents the carrier signal injection based sensorless control of permanent magnet synchronous machine (PMSM) drives with limited inverter switching frequency. Accounting for the influence of stator resistances, the amplitude of carrier current utilised for position tracking can be maximized under an optimized injection frequency, with which signal to noise (S/N) ratio of carrier signal...
This paper explains the reason for the difference in maximum torque-speed characteristics and power factor of IM between motor and generator modes and investigates the influence of machine design parameters on the difference, such as stator resistance, rotor resistance and iron loss etc. An analytical mathematical model based on the dq reference frame is employed for investigation. It is shown that...
This paper investigates the influence of nonideal voltage measurements on the parameter estimation of permanent-magnet synchronous machines (PMSMs). The influence of nonideal voltage measurements, such as the dc bus voltage drop, zero shift in the amplifier, and voltage source inverter nonlinearities, on the estimation of different machine parameters is investigated by theoretical and experimental...
This paper investigates the influence of inverter nonlinearity on the parameter estimation in permanent magnet synchronous machines (PMSM). An estimator based on model reference adaptive system (MRAS) is firstly described for simultaneously estimating the stator winding resistance and rotor flux linkage, together with injection of a pulse of id <; 0 which is required for activating the estimation...
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