Position-sensorless control method at low speed for permanent magnet synchronous motors using induced voltage caused by magnetic saturation

Iwaji, Yoshitaka; Kokami, Yasuhiko; Kurosawa, Minoru

doi:10.1109/ipec.2010.5542008

Cited by 18 publications

(6 citation statements)

References 9 publications

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“…Sections IV and V explain simulation analysis with these methods. Figure 10 clarifies the principles underlying the estimation of initial rotor position [5], where voltage pulses were applied to PMSMs. Positive and negative currents were generated in each phase by these pulses.…”

Section: Es Timation Of Initial Positionmentioning

confidence: 99%

“…This indicated that the N-model was very useful for designing estimates of the initial position. A position sensorless method for non-salient PMSMs has previously been reported [5] and [6], where PMSM is driven by block commutation and open phase voltage is detected. The generated voltage in the open phase is called induced voltage caused by magnetic saturation (IVMS).…”

Section: Es Timation Of Initial Positionmentioning

confidence: 99%

See 1 more Smart Citation

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Iwaji

Nakatsugawa

Sakai

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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We have developed a mathematical model for permanent magnet synchronous motors (PMSMs). The nonlinear characteristics of this model are expressed using a total of eight constants. The magnet flux characteristics of PMSMs can be obtained by using this simplified model. This model can also be transformed into a reverse function, and motor drive simulation including nonlinear characteristics can easily be implemented. Here, we present the simulation results using our nonlinear model. We also demonstrated the effectiveness of the model by simulating estimates of rotor positions based on magnet flux nonlinear characteristics.

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Section: Es Timation Of Initial Positionmentioning

confidence: 99%

Section: Es Timation Of Initial Positionmentioning

confidence: 99%

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Iwaji

Nakatsugawa

Sakai

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, the DFC technique has been successfully used in several practical applications such as the identification of electrical and mechanical parameters of PMSMs [31] and the observation of the external load torque using state observation techniques in [32]. Besides this technique, another interesting approach was proposed by [33] that goes under the name of IVMS (induced voltage caused by magnetic saturation), that is capable of estimating the electrical rotor position by exciting two machine phases at a time and measuring the neutral point voltage. This first version of the technique was designed for brushless DC machines (BLDC), that are typically driven by means of block commutation (while Brushless AC Machines, BLAC, rely on sinusoidal commutation).…”

Section: Introductionmentioning

confidence: 99%

Influence and compensation of the stator flux on the direct flux control sensorless technique for PMSMs

Grasso

Palmieri

Mandriota

et al. 2021

J. eng.

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Several techniques exploiting machines anisotropies have been proposed in literature for sensorless control of synchronous machines. Among them, the direct flux control (DFC) technique allows estimating the electrical rotor position by exploiting the zero-sequence voltage of the machine. This work aims at analysing the effects of magnetic saturation on the application of the DFC technique to permanent magnet synchronous machines. This effect is present when stator flux is controlled during machine operation, leading to an error in the estimation of the electrical rotor position. Starting from an analytical model of the machine phase inductances, a complete mathematical description of the DFC technique is derived and presented. The proposed mathematical model shows how the estimated electrical rotor position is biased when operating under load conditions. Moreover, the result of the analysis of the DFC technique allows to refine the obtained estimate and to reduce the electrical rotor estimation error. Experimental results on a test motor are provided in order to verify and support the proposed mathematical model and technique.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…In order to improve the quality of such measurements, a Fast resettable integrator circuit (FRIC) was presented in [21][22][23]. Another interesting usage of the zero-sequence voltage for sensorless operation of PMSMs is reported, firstly, in [24], where the machine is operated by exciting two machine phases and by measuring the induced voltage caused by magnetic saturation (IVMS) allowing for the estimation of the rotor position. This technique presented the limitation of allowing only block-commutation so, in order to overcome this limitation, this technique was further developed and proposed in [25].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Application of the Direct Flux Control Sensorless Technique to Low-Power PMSMs

et al. 2020

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In the field of sensorless control of permanent magnet synchronous motors (PMSMs), different techniques based on machine anisotropies have been studied and implemented successfully. Nevertheless, most proposed approaches extract the rotor position information from the measured machine currents, that, when applied to low-power machines, might require high-bandwidth current sensors. An interesting alternative is given by sensorless techniques that exploit the star-point voltage of PMSMs, such as the direct flux control technique. This work aims at analyzing the conditions of applicability of such technique by considering a more thorough description of the machine inductance matrix. After a comprehensive mathematical description of the technique and characterization of the machine anisotropy information that is extracted from the star-point voltage, simulation as well as experimental results conducted on a test machine are presented and discussed in order to validate the proposed theory.

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Position-sensorless control method at low speed for permanent magnet synchronous motors using induced voltage caused by magnetic saturation

Cited by 18 publications

References 9 publications

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Influence and compensation of the stator flux on the direct flux control sensorless technique for PMSMs

Analysis and Application of the Direct Flux Control Sensorless Technique to Low-Power PMSMs

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