SynRM Sensorless Torque Estimation Using High-Frequency Signal Injection

Martinez, Maria; Laborda, Diego F.; Reigosa, David; Fernández, Daniel; Guerrero, Juan Manuel; Briz, Fernando

doi:10.1109/tia.2021.3111840

Cited by 5 publications

(3 citation statements)

References 43 publications

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“…Simultaneously, the impact on torque ripple caused by HFI in the q-axis is nearly identical to d case. These losses happen because HFI produces a minor hysteresis loop that increases the hysteresis loss [23], leading to further temperature rise and other issues.…”

Section: B Generalized Position Tracking Loopmentioning

confidence: 99%

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Generalized High-Frequency Injection Framework for Sensorless Control of Synchronous Reluctance Machines

Prystupa

Huang

Zhang

et al. 2023

IEEE Open J. Ind. Electron. Soc.

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The high-frequency injection (HFI) method is commonly used for sensorless control of synchronous reluctance motors (SynRMs) at low speeds. Injecting a high-frequency (HF) signal in a predefined direction, referred to as the d-axis, and further demodulating the excited signal in the q-axis are a popular sequence for SynRM position tracking. Injection in the q-axis is not usually considered due to its potential to increase torque ripple. This article proposes a generalized HF pulsating voltage injection approach for sensorless control of SynRM. This approach allows for the arbitrary selection of injection strategy and covers the injection and demodulation procedures in d-and q-axes in detail. Special attention is given to determining the amplitude of the injection voltage, which can extend the usage range of HFI and support sensorless control at high speeds. The effectiveness of the proposed structures is experimentally verified using 15 kW SynRM. During system validation, extra care is taken to investigate the overall system efficiency and vibration levels, including torque ripple issues. This solution contributes to the advancement of sensorless control for SynRM drives.INDEX TERMS High-frequency injection (HFI), motor efficiency, sensorless control, synchronous reluctance motor (SynRM), torque control, variable frequency drives.

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Section: B Generalized Position Tracking Loopmentioning

confidence: 99%

“…Due to variations in machine inductances, the amplitude of HF current changes with machine load, which can impact torque ripple, power losses, and acoustic noise. For the case of injection along the q axis in accordance to (23), voltages required for position estimation take the following form:…”

Section: Injection Voltage Amplitude Adaptationmentioning

confidence: 99%

Generalized High-Frequency Injection Framework for Sensorless Control of Synchronous Reluctance Machines

Prystupa

Huang

Zhang

et al. 2023

IEEE Open J. Ind. Electron. Soc.

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“…[22] uses the dynamic inductance instead of the DC inductance, resulting therefore in PM flux linkage estimation errors. Nevertheless, it is possible to obtain the DC inductance considering magnetic saturation from the dynamic inductance by ( 5) and ( 6) [32]- [33]:…”

Section: B Pm Flux Linkage Estimationmentioning

confidence: 99%

Variable Leakage Flux Permanent Magnet Synchronous Machine PM Temperature Estimation Based on PM Flux Linkage

Laborda,

Reigosa,

Fernández

et al. 2023

IEEE Access

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The performance of Permanent Magnet Synchronous Machines (PMSMs) is significantly influenced by the temperature of the Permanent Magnets (PMs). Therefore, accurate knowledge of PM temperature is necessary for control and monitoring purposes. As temperature rises, the magnetic flux strength of PMs, and consequently the torque production capability of PMSMs, diminishes. Moreover, there is a risk of irreversible demagnetization of the PMs. In the case of Variable Leakage Flux PMSMs (VLF-PMSMs), the temperature impacts the machine's variable leakage property, potentially compromising the accuracy of torque control. The current state-of-the-art PM temperature estimation methods are unsuitable for VLF-PMSMs due to their variable leakage PM flux characteristics. This paper addresses the limitations of existing PM temperature estimation methods by incorporating the variable leakage PM flux property of VLF-PMSMs. The proposed method utilizes PM flux linkage derived from the machine's response to a smallamplitude, low-frequency, quasi-square-wave current signal. This signal is superimposed onto the fundamental excitation, enabling online temperature estimation without altering the machine's operation.

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Control Strategy of Different Operation Modes for a Multiple Torque Component Single Air Gap Magnetless Machine

Jia

Dong

Liang

et al. 2023

IEEE Trans. on Ind. Applicat.

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SynRM Sensorless Torque Estimation Using High-Frequency Signal Injection

Cited by 5 publications

References 43 publications

Generalized High-Frequency Injection Framework for Sensorless Control of Synchronous Reluctance Machines

Generalized High-Frequency Injection Framework for Sensorless Control of Synchronous Reluctance Machines

Variable Leakage Flux Permanent Magnet Synchronous Machine PM Temperature Estimation Based on PM Flux Linkage

Control Strategy of Different Operation Modes for a Multiple Torque Component Single Air Gap Magnetless Machine

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