A Novel Design Method for Resolver-to-Digital Conversion

Wang, Yijing; Zhu, Zhongwen; Zuo, Zhiqiang

doi:10.1109/tie.2014.2375254

Cited by 59 publications

(12 citation statements)

References 18 publications

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“…Solving (11), the value of the parameter a 1 ≈0.64039 is univocal, which corresponds to a maximum angle approximation error of about 0.00810°, which means that the RDC is up to about 15bit resolution (360°/32768) in the first quadrant. The derivation process and 3D-figure of the error are described in detail in the appendix.…”

Section: A Third-order Rational Fraction Polynomial Approximationmentioning

confidence: 99%

“…In [8]- [10], the pseudo linear signals are made up of the difference between the absolute values of sine and cosine signals. In [11], a pseudo linear signal is obtained through appropriate mathematical manipulation between the auxiliary sinusoidal signals generated by plus and minus operation and the demodulated ones. In [12], multiple phase-shifted sinusoids (PSS) construct the pseudo-linear segments to determine the angle.…”

Section: Introductionmentioning

confidence: 99%

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A Resolver-to-Digital Conversion Method Based on Third-Order Rational Fraction Polynomial Approximation for PMSM Control

Wang

Kang

Buticchi

2019

IEEE Trans. Ind. Electron.

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In this paper, a cost-effective and highly accurate resolver-to-digital conversion (RDC) method is presented. The core of the idea is to apply a third-order rational fraction polynomial approximation (TRFPA) for the conversion of sinusoidal signals into the pseudo linear signals, which are extended to the range 0-360° in four quadrants. Then, the polynomial least squares method (PLSM) is used to achieve compensation to acquire the final angles. The presented method shows better performance in terms of accuracy and rapidity compared with the commercial available techniques in simulation results. This paper describes the implementation details of the proposed method and the way to incorporate it in digital signal processor (DSP) based permanent magnet synchronous motor (PMSM) drive system. Experimental tests under different conditions are carried out to verify the effectiveness for the proposed method. The obtained maximum error is about 0.0014° over 0-360°, which can usually be ignored in most industrial applications.

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Section: A Third-order Rational Fraction Polynomial Approximationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Resolver-to-Digital Conversion Method Based on Third-Order Rational Fraction Polynomial Approximation for PMSM Control

Wang

Kang

Buticchi

2019

IEEE Trans. Ind. Electron.

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“…In addition, differentiation and filtering to remove high frequency noise, which cause phase delay, are required to obtain angular speed and acceleration [ 25 , 26 , 27 ]. Further less-common open-loop methods can be found in [ 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Determining Angular Speed and Acceleration Using Sin-Cos Encoders

Vargas

Fernández

García

et al. 2021

Sensors

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The performance of vehicle safety systems depends very much on the accuracy of the signals coming from vehicle sensors. Among them, the wheel speed is of vital importance. This paper describes a new method to obtain the wheel speed by using Sin-Cos encoders. The methodology is based on the use of the Savitzky–Golay filters to optimally determine the coefficients of the polynomials that best fit the measured signals and their time derivatives. The whole process requires a low computational cost, which makes it suitable for real-time applications. This way it is possible to provide the safety system with an accurate measurement of both the angular speed and acceleration of the wheels. The proposed method has been compared to other conventional approaches. The results obtained in simulations and real tests show the superior performance of the proposed method, particularly for medium and low wheel angular speeds.

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“…Measuring the angular position is important in the automotive industry [1,2,3,4,5]. Angle sensors are widely used in unmanned aerial vehicles (UAVs), small robots, and high-precision gimbal systems.…”

Section: Introductionmentioning

confidence: 99%

An Analog Interface Circuit for Capacitive Angle Encoder Based on a Capacitance Elimination Array and Synchronous Switch Demodulation Method

Hou

Zhou

et al. 2019

Sensors

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This paper presents an analog interface application-specific integrated circuit (ASIC) for a capacitive angle encoder, which is widely used in control machine systems. The encoder consists of two parts: a sensitive structure and analog readout circuit. To realize miniaturization, low power consumption, and easy integration, an analog interface circuit including a DC capacitance elimination array and switch synchronous demodulation module was designed. The DC capacitance elimination array allows the measurement circuit to achieve a very high capacitance to voltage conversion ratio at a low supply voltage. Further, the switch synchronous demodulation module effectively removes the carrier signal and greatly reduces the sampling rate requirement of the analog-to-digital converter (ADC). The ASIC was designed and fabricated with standard 0.18 µm CMOS processing technology and integrated with the sensitive structure. An experiment was conducted to test and characterize the performance of the proposed analog interface circuit. The encoder measurement results showed a resolution of 0.01°, power consumption of 20 mW, and accuracy over the full absolute range of 0.1°, which indicates the great potential of the encoder for application in control machine systems.

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A Novel Design Method for Resolver-to-Digital Conversion

Cited by 59 publications

References 18 publications

A Resolver-to-Digital Conversion Method Based on Third-Order Rational Fraction Polynomial Approximation for PMSM Control

A Resolver-to-Digital Conversion Method Based on Third-Order Rational Fraction Polynomial Approximation for PMSM Control

A Novel Method for Determining Angular Speed and Acceleration Using Sin-Cos Encoders

An Analog Interface Circuit for Capacitive Angle Encoder Based on a Capacitance Elimination Array and Synchronous Switch Demodulation Method

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