Error Analysis and Compensation of the Orthogonal Magnetic Encoder

Lin, Qilang; Li, Tiecai; Zhou, Zebing

doi:10.1109/imccc.2011.12

Cited by 14 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured rotor positionθ r deviates from the true position value θ r due to various non-idealities [6], [7] such as the misalignment of the sensor components or Driving this signal to zero to estimate the rotor position yields, sin(θ r −θ r ) = ζ cos θ r sinθ r . (1.7)…”

Section: Non-ideal Characteristicsmentioning

confidence: 99%

Mitigation of DC-Link Voltage Oscillations Caused by Resolver Error in an Electric Vehicle Drivetrain

Sayed

Aliprantis

et al. 2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

Resolvers are commonly used to measure the rotor position in motor drive applications. However, manufacturing imperfections introduce a position measurement error, which manifests itself as relatively small oscillations primarily at the fundamental and second harmonic frequencies. This affects the field orientation control in machines, leading to oscillations in currents and electromagnetic torque. This research focuses on the impact of position error in a series-hybrid drivetrain architecture. In this topology, substantial oscillations in dc-link voltage are induced, which are further exacerbated by reducing the dc-link capacitance in a bid to lower the overall inverter size and weight. This work sets forth various methods to mitigate the aforementioned dc-link oscillations based on control modifications. To this end, a linearized small-signal detailed model of the drivetrain is developed first to support the analysis of the phenomenon. The effectiveness of these techniques is validated by analytical and experimental results.

show abstract

Section: Non-ideal Characteristicsmentioning

confidence: 99%

Mitigation of DC-Link Voltage Oscillations Caused by Resolver Error in an Electric Vehicle Drivetrain

Sayed

Aliprantis

et al. 2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

show abstract

“…Filtering methods for the resolver position signal can be categorized into two types: offline calibration and online filtering. In the traditional offline calibration method, a compensating look-up table (LUT) is usually constructed based on the resolver signal sampled in some specified operating conditions [4][5][6][7]. Stability and reliability are the main advantages of the offline calibration method.…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of the presented method mainly lies in that it has excellent position signal filtering performance in the entire operating condition, including low speed, high speed, steady state, and dynamic. Compared with offline calibration algorithms [4][5][6][7][8], the proposed RLS-PLL-based filtering algorithm can effectively eliminate additional harmonics caused by complex electromagnetic environment in practice. The new algorithm can almost completely eliminate the specified harmonic above the bandwidth and has favorable filtering performance against the harmonics below the bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A novel filtering algorithm for the resolver position signal based on recursive least squares and phase‐locked loop

Lian

Xiao

Liu

et al. 2021

IET Power Electronics

View full text Add to dashboard Cite

This paper presents a novel filtering algorithm for the resolver position signal based on recursive least squares (RLS) and phase‐locked loop (PLL). The proposed RLS‐PLL‐based algorithm designs a harmonic iterative estimation and elimination mechanism, which can accurately estimate and eliminate the specified harmonic contained in the resolver online and obtain an ideal reconstructed position signal. The convergence analysis, parameter design and pseudo code of the proposed algorithm are all provided. The advantage of the presented method mainly lies in that it has excellent position signal filtering performance in the entire operating condition, including low speed, high speed, steady state, and dynamic. Experimental results demonstrate that compared to the results achieved with the conventional look‐up table (LUT) method and the advanced type‐III angle tracking observe (ATO), the proposed RLS‐PLL‐based algorithm has improved filtering performance. Under some typical operating conditions, the harmonic content of the position signal reconstructed by the new method is reduced by an order of magnitude.

show abstract

“…In [1] and [2], a method for estimating the accuracy of quadrature output sensors is proposed. The reductions of the imperfections can be performed either in software or implemented with a conditional circuit that is inserted between the output sensors and interpolator [3].…”

Section: Introductionmentioning

confidence: 99%

Precision Delay Circuit for Analog Quadrature Signals in Sin/Cos Encoders

Dogša

Solar

Jarc

2014

IEEE Trans. Instrum. Meas.

View full text Add to dashboard Cite

This paper considers the problem of setting small and accurate delay of those analog quadrature signals generated in the sin/cos encoders within the range of ±10°. Such precision is needed for the efficient phase shift compensation. A typical analog delay circuit is comprised of a summing amplifier and digitally controlled variable resistor used to set a delay of the cos signal. The main disadvantage of this delay circuit is poor linearity. We propose a new circuit based on a voltage divider with about three times better linearity and a completely symmetrical range. The effects of the component tolerances and signals' irregularities on the accuracy of the delay are explored. The detailed theoretical worst case analysis and simulation shows that for the integrated version with the 128-tap digital potentiometer ( R/R = 1 LSB = 0.8%), the tolerances contribute 0.34°to the total error and typical signal irregularities of ∼0.40°. The measurement of the prototype circuit shows that with the discrete elements it is possible to obtain a total error of below 0.2°within the range from 0°to 5°, if the signals are of good quality.Index Terms-Analog quadrature signals, delay circuit, error analysis, phase delay, quadrature encoder signals.

show abstract

Error Analysis and Compensation of the Orthogonal Magnetic Encoder

Cited by 14 publications

References 1 publication

Mitigation of DC-Link Voltage Oscillations Caused by Resolver Error in an Electric Vehicle Drivetrain

Mitigation of DC-Link Voltage Oscillations Caused by Resolver Error in an Electric Vehicle Drivetrain

A novel filtering algorithm for the resolver position signal based on recursive least squares and phase‐locked loop

Precision Delay Circuit for Analog Quadrature Signals in Sin/Cos Encoders

Contact Info

Product

Resources

About