NDLI: DSP-based resolver-to-digital conversion system designed in time domain

Content Provider	IET Digital Library
Author	Hou, Chung Chuan Chiang, Ying Hsuan Lo, Chi Pong
Abstract	Resolver is an absolute angle measurement and is mounted on the motor shaft to acquire the motor's absolute angular position. This study presents an equivalent circuit of the resolver neglected rotational back electromotive force. The transfer function of the resolver is derived from the equivalent circuit. The frequency response of the resolver is measured by a dynamic signal analyser to obtain the adequate frequency of resolver's reference signal. Furthermore, a digital signal processor (DSP)-based resolver-to-digital conversion system is designed in time domain. A pulse signal generated by the DSP is utilised as a reference signal coupled into the resolver's rotor winding and provides primary excitation. The sine and cosine modulated output signals are sampled by the analogue-to-digital converter of the DSP within 1 μs. The sampled frequency of outputs signals are the same frequency as the pulse signal. The angular position is derived by the inverse tangent of the quotient of the demodulated sine and cosine samples. Test results are presented to validate the performances of the proposed scheme.
Starting Page	2227
Ending Page	2232
Page Count	6
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 9, Sep (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0502
Journal	IET Power Electronics
Publisher Date	2014-04-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A/D And D/A Convertor Analogue-Digital Conversion Analogue-to-digital Converter Angle Measurement Angular Measurement Cosine Modulated Output Signal Digital Signal Processing Chips Digital Signal Processor DSP-based Resolver-to-digital Conversion System Dynamic Signal Analyser Electric Motors Electric Sensing Device Equivalent Circuit Frequency Response Inverse Tangent Machine Windings Motor Absolute Angular Position Motor Shaft Position Measurement Pulse Signal Resolver Neglected Rotational Back Electromotive Force Resolver Reference Signal Resolver Rotor Winding Rotors Sampled Output Signal Frequency Sensing Device And Transducers Shafts Sine Modulated Output Signal Size 1 Mum Spatial Variables Measurement Time Domain Analysis Transfer Function
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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