A new simplified sensorless control method for a single phase SR motor using HF signal injection

Ahmed, Saeed; Lefley, Paul

doi:10.1109/upec.2007.4469100

Cited by 6 publications

(6 citation statements)

References 1 publication

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“…High frequency (HF) injection has been used over the past 30 years for a wide range of motor types including permanent magnet synchronous motors (PMSMs) [19][20][21], switched reluctance motors (SRMs) [22], brushless DC motors (BLDCs) [23], and induction motors [24]. This family of sensorless algorithms takes advantage of the saliency of an electrical machine to identify the angle of its rotor.…”

Section: High Frequency Injectionmentioning

confidence: 99%

Active noise control by means of high frequency injection in electric motors

Skoulaxinos,

Wheeler,

Vakil

2024

IET Electric Power Appl

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Machine acoustics is an important area of research impacting the quality and comfort of human life. With increased levels of electrification and the wider use of electric motors, the contribution of motor drives towards quieter acoustic systems becomes increasingly important. This paper presents a novel acoustic improvement method involving the use of acoustic waves generated from High Frequency Injection to perform Active Noise Control. Although High Frequency Injection has been used widely in the domain of sensorless motor control, its acoustic generation process has been so far perceived as a negative by‐product. This paper presents the analysis and experimental results from the application of the proposed method to the Helicopter Electro‐Mechanical Actuation System. Considering the extensive use of motor drives in a number of industries, the proposed practice of High Frequency Injection Active Noise Control can have a significant impact to future applications.

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Section: High Frequency Injectionmentioning

confidence: 99%

Active noise control by means of high frequency injection in electric motors

Skoulaxinos,

Wheeler,

Vakil

2024

IET Electric Power Appl

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“…The high-speed sensorless drive has been relatively mature [13][14][15][16], while the detected signal has a low signal-to-noise ratio at zero or low-speed range. For doubly salient reluctance machine low-speed sensorless drive, modulation method [17][18], sense coil method [19][20], current waveform method [21][22] and pulse injection method [23][24][25][26][27][28][29][30] are typical strategies. In the modulation method, by injecting a high-frequency detection signal into the idle phase through an oscillator, the modulated signal is detected by the demodulation circuit, and a switching circuit is required [17][18].…”

Section: Introductionmentioning

confidence: 99%

“…In the modulation method, by injecting a high-frequency detection signal into the idle phase through an oscillator, the modulated signal is detected by the demodulation circuit, and a switching circuit is required [17][18]. In the sense coil method [19][20], the parallel sense coils are embedded in the slots in reverse series to minimize the mutual inductance coupling. Full-cycle position detection without a switch circuit can be achieved, but this method also requires additional excitation sources and detection circuits.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis and Optimization of Novel Pulse Injection Sensorless Drive Methods for Fault-Tolerant DC Vernier Reluctance Machine

Wang

Zhao

Niu

et al. 2022

IEEE Trans. Power Electron.

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Multiphase DC-Excited Vernier reluctance machine (DC-VRM) exhibits the merits of robust structure, small torque ripple and good fault-tolerant ability. Developing advanced sensorless drive methods can further promote its application in the safety-critical system. In this paper, pulse injection sensorless drive methods are optimized in a 6-phase DC-VRM parallel Hbridge drive system to strengthen their acceleration performance and fault-tolerant ability. The acceleration performance studied in this article corresponds to the acceleration speed during the startup stage. By the full-phase alternative pulse injection method (APIM), each phase can be excited independently to avoid mutual inductance influence on position estimation, but this method suffers from a long communication delay and relatively poor acceleration performance. A reduced-phase alternative pulse injection method (APIM) can reduce detection time, but the lack of detected phase may influence position estimation accuracy and fault-tolerant ability. To solve these problems, a novel vertical-axis synchronous pulse injection method (SPIM) is proposed and compared with previous methods in this paper. The key is to inject detection pulses into vertical-axis phases simultaneously, thus reducing the detection time and improving the torque generation. It is proved that the influence of mutual inductance on position estimation can be ignored, and the detection accuracy and acceleration performance can be improved without deterioration of fault-tolerant ability.

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“…Till now, there have a lot of existing sensorless control methods for SRM drive [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Basically, the existing position sensorless methods can be categorized into [8]: (i) waveform detection methods [8]: one of the possible approaches is that the winding current waveform within a PWM switching period is sensed and processed to yield the rotor position dependant inductance, and thus the estimated rotor position is obtained by post processing; (ii) flux linkage methods [8][9][10]: the phase winding flux linkage O is first obtained from the sensed voltage and current.…”

Section: Introductionmentioning

confidence: 99%

“…The common drawback of these methods is that the extensive memory to store the look-up tables is required; (iii) motor model based methods [11][12][13][14]: the state observer and the inductance model-based methods are two typical ones. These methods require complex executions for the designed control algorithms; (iv) signal injection methods [15,16]: the external signal injection and detection circuits are needed; (v) narrow voltage pulse injection methods [17][18][19]: the narrow pulse voltages with suited period and pulse width are injected into the un-energized phase by the PWM modulator. And the related magnitudes of current pulses will change with rotor position.…”

Section: Introductionmentioning

confidence: 99%

Position sensorless control for switched-reluctance motor drive with adaptive commutation tuning

Liaw

2014

2014 International Conference on Information Science, Electronics and Electrical Engineering

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This paper presents the position sensorless control for switched reluctance motor (SRM) drive having improved performance via adaptive self commutation instant tuning (ACT). The narrow voltage pulses with suited frequency and duration are injected into an un-energized phase winding via the PWM channel. The resulted amplitude modulated winding currents are sensed and signal processed to yield the observed Hall signal for sensorless control. The determination of key parameters of the proposed sensorless control scheme and the effects of resulted amplitude modulated winding currents are analyzed. No external injection circuit and the motor parameters are required. The observed speed is obtained from the sensed four winding currents. The motor is first started in stepping motor mode, and then it is changed to the sensorless SRM mode as the speed is raised to a suited value. To improve the torque generating capability, an adaptive self commutation control scheme with the identified winding inductance is developed. Experimental evaluation shows that the developed position sensorless SRM drive possesses good driving performance within a reasonably wide speed range. Index Terms-SRM, position sensorless control, narrow pulse injection, commutation tuning, current control, speed control. G ' J J J G '

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A new simplified sensorless control method for a single phase SR motor using HF signal injection

Cited by 6 publications

References 1 publication

Active noise control by means of high frequency injection in electric motors

Active noise control by means of high frequency injection in electric motors

Comparative Analysis and Optimization of Novel Pulse Injection Sensorless Drive Methods for Fault-Tolerant DC Vernier Reluctance Machine

Position sensorless control for switched-reluctance motor drive with adaptive commutation tuning

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