Journal
IEEE ACCESS
Volume 10, Issue -, Pages 7016-7024Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3136770
Keywords
Pulse width modulation; Signal resolution; Demodulation; Synchronization; Sensors; Phase locked loops; Frequency modulation; Phase-locked loop (PLL); resolver-to-digital conversion (RDC); demodulation; resolver; envelope detection
Ask authors/readers for more resources
This paper investigates the use of resolvers as position sensors for obtaining angle information. To achieve precise signal detection, the resolver signals are sampled in synchronization with the pulsewidth modulation (PWM) carrier. Additional signal processing is required when the resolver excitation signal frequency and the PWM carrier frequency are different in order to obtain angle information.
Resolvers are widely used as position sensors to obtain angle information. The resolver requires the excitation signal and its amplitude is modulated by the rotor position. The envelope of the modulated signal can be detected precisely only when the samplings are synchronized with the excitation signal. A large error can occur if the synchronization fails. In this paper, the resolver signals are sampled in synchronization with the pulsewidth modulation (PWM) carrier, not the excitation signal. When the resolver excitation signal frequency and the PWM carrier frequency are different, the envelope cannot be detected, so additional signal processing is required to obtain the angle information. For signal processing, multiple auxiliary signals are synthesized based on the sampled signals and quadrature demodulation is performed. A detailed error analysis according to the PWM frequency and motor speed is also performed. The effectiveness is demonstrated through simulation and experimental evidence.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available