For the calculationof torque in synchronousmotors a local method is analysed, based on the Maxwell stress theory and the filtered contributions due to the harmonics of the magnetic vector potential in the motor air-gap. By considering the space fundamental field only, the method can efficiently estimate the average synchronous torque for a variety ormotor topologies, including concentratedwindi...

In industry, the most frequently used motors are induction (IMs), reluctance motors, and permanent magnet synchronous machines (PMSMs). Nowadays because of higher efficiency with power density, PMSM attracts its uses in every field application. Hence, a spoke shape interior PM-based motor (IPMSM) distributed winding is considered to discuss this paper. Also, there has always been dispute betwee...

A surface-mounted permanent magnet synchronous motor (SPMSM) is an electric with a simple magnetic circuit design, fast responsiveness, linear torque–current characteristics, speed–voltage and constant operating speed. SPMSMs use only torque; however, interior PMSMs (IPMSMs) have high power densities because they can reluctance torque. In addition, when flux-weakening control used, the range wi...

This paper proposes a unidirectional finite control set-predictive toque (UFCS-PTC) method for three-level neutral-point-clamped (3L-NPC) inverter fed interior permanent magnet synchronous motor (IPMSM). The proposed algorithm can lower the complexity of PTC by 3L-NPC reducing number admissible voltage vectors (VVs) effectively. candidate VVs are restricted within 60° space diagram (VSVD), whic...

Combining the main advantages of the permanent magnet synchronous motors and pure synchronous reluctance motors (SynRM), permanent magnet assisted synchronous reluctance motor (PMaSynRM) has been considered as a promising alternative to the conventional induction motors. In this paper, utilizing a macroscopic design parameter, called insulation ratio along the q-axis, and based on the magnetic ...

This paper presents the modelling of asymmetries of phase parameters (inductances) of permanent magnet (PM) synchronous motor and the analysis of the impact of these asymmetries on the instantaneous torque. The torque ripple created by phase asymmetries is simulated for three operating conditions – current-fed, voltage-fed and vector control operation, using specifically developed mathematical ...

This paper proposes a new convergence acceleration method specialized for the magnetic field analyses of synchronous machines based on time-periodic explicit-error-correction (TP-EEC) method. The proposed constructs an auxiliary equation error correction in dq rotational reference frame to convert fundamental harmonic component into DC component. conversion enables us perform using TP-EEC at in...

This paper proposes an improved sensorless control to estimate the rotor position of an interior permanent magnet synchronous motor. A phase-locked loop (PLL) is used to obtain the phase angle of the grid. The rotor position can be estimated using a PLL based on extended electromotive force (EEMF) because the EEMF contains information about the rotor position. The proposed method can reduce the...