Sensorless control of permanent-magnet synchronous motors adopting indirect self-control

Wallmark, Oskar; Galic, Johann; Mosskull, Henrik

doi:10.1049/iet-epa.2010.0290

Cited by 9 publications

(10 citation statements)

References 22 publications

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“…Literature clearly indicates that research concerning sensorless control for PMSM and induction machines is obtaining mature [11][12][13][14]. Research efforts have also been made to implement sensorless control for stepping motors [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, adaptations to the drive or control electronics, which would increase the cost, should be avoided. This could be a reason to avoid signal injection-based sensorless methods which exploit the salient character of the hybrid stepping motor rotor, as used for PMSM [11,12,18,19]. Accurate observer-based methods on the other hand, use an inner control loop to compensate model errors [17].…”

Section: Introductionmentioning

confidence: 99%

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Load angle estimation for two‐phase hybrid stepping motors

Derammelaere

Debruyne

Belie

et al. 2014

IET Electric Power Applications

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Stepping motors are often used for low-power open-loop positioning. In conventional stepping motor drives, a step rate or speed is imposed. To avoid step loss in open-loop, most stepping motors are driven at maximum current resulting in a poor energy efficiency. However, when position feedback is available, the drive current can be optimised. A position sensor adds costs and complexity to the system. Therefore, rotor position estimators are developed, often referred to as sensorless controllers. A drawback in some of these methods is the requirement of information on the mechanical load which is usually not available or varies over time. In this study, an alternative estimator is proposed, based on the load angle between the current excitation vector and the instantaneous rotor flux position. This load angle reflects the capability of the system to follow the speed setpoint and gives an indication of the robustness to torque disturbances. Therefore the load angle estimation is interesting to provide feedback to a controller which adapts the drive current. Here, an estimator is proposed solely based on electrical motor parameters and electrical measurements. The algorithm, based on a sliding discrete Fourier transformation, is applicable with the typical full-, half-and micro-stepping drive algorithms. Finally, measurement results validate the estimation algorithm.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Load angle estimation for two‐phase hybrid stepping motors

Derammelaere

Debruyne

Belie

et al. 2014

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…It is worth to notice that PLL has low-pass filter features. For sensorless algorithms that estimate the position (not position error) directly, a PLL is still employed to filter the noise of the estimation position and in the meantime, the speed may also be estimated [7][8][9][10][11][12][13][14]. The PLL used in the position and speed observer is mainly used for position estimation purpose.…”

Section: Control Scheme Overviewmentioning

confidence: 99%

“…Many research efforts have been dedicated to propose reliable and accurate methods for rotor position estimation [1][2][3], which plays a crucial role in realizing field oriented control (FOC) of various types of AC drives. Rotor position estimation may be accomplished in every switching period for algorithms based on fundamental-or continuous high frequency signal excitations [4][5][6][7][8][9][10][11][12], or in only few switching periods for discontinuous high frequency signal injection based algorithms [13][14][15]. With the position estimation algorithm involved, it was still possible to realize high bandwidth control of the current loop [13].…”

Section: Introductionmentioning

confidence: 99%

“…Such obtained speed signal may have a high noise ratio, resulting in high current disturbances and may not be appropriate for speed feedback in a sensorless drive system [6]. A better solution was proposed to use a phase-locked loop (PLL) to handle the estimated position or position error to generate a better position signal and in the meantime, relatively better speed signal may be achieved [7][8][9][10][11][12][13][14]. Such PLL has been studied in details in [7], [8], and has become a very popular solution [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of low-pass filter and phase-locked loop type speed filters for sensorless control of AC drives

Wang

Rasmussen

et al. 2017

Trans. Electr. Mach. Syst.

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High quality speed information is one of the key issues in machine sensorless drives, which often requires proper filtering of the estimated speed. This paper comparatively studies typical low-pass filters (LPF) and phase-locked loop (PLL) type filters with respect to ramp speed reference tracking and steady-state performances, as well as the achievement of adaptive cutoff frequency control. An improved LPF-based filter structure with no ramping and steady-state errors caused by filter parameter quantization effects is proposed, which is suitable for applying LPF for sensorless drives of AC machines, especially when fixed-point digital signal processor is selected e.g. in mass production. Furthermore, the potential of adopting PLL for speed filtering is explored. It is demonstrated that PLL type filters can well maintain the advantages offered by the improved LPF. Moreover, it is found that the PLL type filters exhibit almost linear relationship between the cutoff frequency of the PLL filter and its proportional-integral (PI) gains, which can ease the realization of speed filters with adaptive cutoff frequency for improving the speed transient performance. The proposed filters are verified experimentally. The PLL type filter with adaptive cutoff frequency can provide satisfactory performances under various operating conditions and is therefore recommended.

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Maximum power per VA control of vector controlled interior permanent magnet motor

Singh

Jain

2018

Sādhanā

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Maximum Torque Per Ampere is the commonly used technique for operating interior permanent magnet (IPM) motor while little work is reported towards maximum power-factor operation i.e., Maximum Power Per Volt-Ampere (MPVA). The MPVA operation allows maximum-utilization of the drive-system. The control technique is developed using detailed mathematical model of IPM motor in MPVA, and the solution to the quartic equations involved is derived and analyzed. The solution is utilized to develop LUT for implementation of MPVA control. The comparison of MTPA and MPVA technique is established to demonstrate its merits and demerits. The proposed algorithm is supported by simulation and experimental results on a 5.5 KW vector controlled IPM drive.

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Sensorless control of permanent-magnet synchronous motors adopting indirect self-control

Cited by 9 publications

References 22 publications

Load angle estimation for two‐phase hybrid stepping motors

Load angle estimation for two‐phase hybrid stepping motors

Comparative study of low-pass filter and phase-locked loop type speed filters for sensorless control of AC drives

Maximum power per VA control of vector controlled interior permanent magnet motor

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