High-Resolution Permanent Magnet Drive Using Separated Observers for Acceleration Estimation and Control
Journal
Sensors
Journal Volume
22
Journal Issue
3
Date Issued
2022
Author(s)
Abstract
This paper proposes a high-resolution permanent magnet (PM) motor drive based on acceleration estimation and control. The PM motor is widely implemented in the printed circuit board (PCB) manufacturing process. To achieve the demanded 1 μm drilling resolution, a sine/cosine incremental encoder is usually installed for motion control. In this paper, several improvements are developed to increase the motion control steady-state accuracy balancing transient response. First, the interpolation of every two encoder counts is proposed to increase the position sensing resolu-tion. In this case, the transient response is improved through the high-resolution position feedback. Second, a closed-loop observer with two independent bandwidths is proposed for acceleration es-timation. By using the interpolated position for acceleration estimation, the vibration-reflected high-frequency torque harmonics can be compensated through the acceleration closed-loop control. It reduces the steady-state error under the same sensing hardware. According to experimental results, both transient response and steady-state error can be improved on a PM motor using the proposed position interpolation and acceleration control. ? 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Subjects
Acceleration control and estimation
Disturbance rejection
PM motor system
Acceleration
Acceleration control
Electric drives
Electric motors
Frequency estimation
Interpolation
Motion control
Permanent magnets
Printed circuit boards
Signal encoding
Transient analysis
Acceleration estimation
High resolution
Manufacturing process
Motor systems
Permanent magnet motor
Permanent magnet motor system
Permanent-magnet motor drives
Printed circuit board manufacturing
Steady state errors
Type
journal article