High-Speed Position-Sensorless Drive of Permanent-Magnet Machine Using Discrete-Time EMF Estimation

Yang, Shih-Chin; Chen, Guan-Ren

doi:10.1109/tie.2017.2652364

Cited by 71 publications

(22 citation statements)

References 18 publications

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“…For model based sensorless control methods, harmonics can adversely affect the estimated rotor position.The proposed adaptive linear neural (ADALINE)-network-based filter can help to improve the predicted rotor position [47][48][49][50][51][52][53][54][55][56]. To satisfy the demand for low frequency ratio control of PMSMs, the synchronous-frame full-order observer provides a good solution [57][58][59][60][61][62][63][64][65][66][67][68].…”

Section: Sensorless Control Methods For Pmsmsmentioning

confidence: 99%

A review of sensorless control methods for AC motor drives

Xu¹,

Wang²,

Zhang

et al. 2018

Trans. Electr. Mach. Syst.

212

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Section: Sensorless Control Methods For Pmsmsmentioning

confidence: 99%

A review of sensorless control methods for AC motor drives

Xu¹,

Wang²,

Zhang

et al. 2018

Trans. Electr. Mach. Syst.

212

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“…where T and k are the sampling time and sequence, respectively. By solving the differential equation in (1) with the discrete-time voltage inputs, V αβ (kT) in (2), the discrete-time machine model can be obtained by (3) [37].…”

Section: Discrete-time Emf Estimationmentioning

confidence: 99%

“…This paper improves the PM machine sensorless drive specifically for high-speed operation. As reported in [37], a discrete-time machine model is implemented to estimate EMF voltages considering EMF voltages can be estimated based on AC signals in the stator-referred stationary frame [26,27] or DC signals in the rotor synchronous frame [28,29]. For AC EMF voltages, the rotor position is calculated based on the arctangent function [27] or the PLL [20,26,33].…”

Section: Introductionmentioning

confidence: 99%

“…This paper improves the PM machine sensorless drive specifically for high-speed operation. As reported in [37], a discrete-time machine model is implemented to estimate EMF voltages considering discretized effects at low f sample / f e . The high-speed drive performance can be improved by including the zero-order-hold (ZOH) reflected voltage delay in the EMF estimation.…”

Section: Introductionmentioning

confidence: 99%

“…The high-speed drive performance can be improved by including the zero-order-hold (ZOH) reflected voltage delay in the EMF estimation. This paper extends [37] in order to further enhance the sensorless position estimation using discretized EMF voltages. On that basis, a PLL cascaded with an arctangent function is used to remove the small-signal approximation at high speed.…”

Section: Introductionmentioning

confidence: 99%

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Position and Speed Estimation of Permanent Magnet Machine Sensorless Drive at High Speed Using an Improved Phase-Locked Loop

et al. 2017

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In conventional position sensorless permanent magnet (PM) machine drives, the rotor position is obtained from the phase-locked loop (PLL) with the regulation of spatial signal in estimated back electromotive force (EMF) voltages. Due to the sinusoidal distribution of back-EMF voltages, a small-signal approximation is assumed in the PLL in order to estimate the position. That is, the estimated position is almost equal to the actual position per sample instant. However, at high speed when the ratio of sampling frequency, f sample , over the rotor operating frequency, f e , is low, this approximation might not be valid during the speed and load transient. To overcome this limitation, a position estimation is proposed specifically for the high-speed operation of a PM machine drive. A discrete-time EMF voltage estimator is developed to obtain the machine spatial signal. In addition, an arctangent calculation is cascaded to the PLL in order to remove this small-signal approximation for better sensorless drive performance. By using the discrete-time EMF estimation and modified PLL, the drive is able to maintain the speed closed-loop at 36 krpm with only 4.2 sampling points per electrical cycle on a PM machine, according to experimental results.

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