High performance control technique for unbalanced operations of single-vsi dual-PM brushles motor drives

Control Method for Mono Inverter Dual Parallel Surface-Mounted Permanent-Magnet Synchronous Machine Drive System

“…For this reason, there has been consistent demand for reducing circuit cost from the fields where the cost is critically concerned such as home appliances and small machine drive application. Position or speed sensor eliminations [2]- [12], current sensing techniques using resistors [13]- [16], and parallel dual/multi machine drives [17]- [26] are the representative studies for the circuit reduction. Among the various challenges, parallel machine drive technique failed to arouse the interests of researchers and manufacturers due to the synchronized speed operation and the deteriorated performance compared to other techniques.…”

“…While various control strategies have been researched for the MIDP IM drive system, control method for permanent magnet synchronous machines (PMSMs) attracts less attention due to its inherent instability risk. However, as PMSMs are getting used in lots of fields due to its high power density and efficiency, studies about the MIDP PMSM drive system are executed [22]- [26]. In [22] and [23], analysis of multi PMSM drive system and the control strategy based on higher torque machine were presented.…”

“…In [24], predictive control method for MIDP Surface mounted PMSM (SPMSM) drive system was proposed. The average current control method was proposed in [25] and the control method which controls both average and differential currents was proposed in [26]. Although these researches succeed to drive dual parallel PMSM with single inverter, these researches tend to rely on mechanical damping or model based control for stabilizing.…”

Thermal-electromagnetic analysis of a fault-tolerant dual-star flux-switching permanent magnet motor for critical applications

“…To enhance the fault tolerant capability, a lot of methods have been proposed in recent years, e.g. the multi-phase machines (the number of phase ݊ 3) [1]- [5], multi-motor structures [6] or dual-star stator machines [7]- [8], etc.…”

“…However, because of the increase of additional end-winding length, the series [9] or parallel [6] motor connections need more system volume than the single-motor structure.…”