TY - GEN
T1 - Influence of the PWM frequency on dynamic and position stability of servo drives
AU - Hollthaler, Julia
AU - Hagl, Rainer
AU - Kennel, Ralph
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/6
Y1 - 2020/6
N2 - The dynamic behavior and position stability of servo drives are influenced by many parameters. One major influencing parameter is the pulse width modulation (PWM) frequency. With inverters based on wide bandgap semiconductors, the PWM frequency can be increased. This enables a substantial increase in the current control bandwidth. The paper focuses on the influence of the PWM frequency on the dynamics of control loops and position stability, which are derived from theoretical correlations. The theory is verified using a test bench for high dynamic and position stability. The test bench is equipped with a voice coil motor and power electronic with gallium nitride (GaN) power semiconductors for switching frequencies of 100 kHz and over. The achieved position stability, measured with a laser-based comparator at the tool center point, is lower than ±1 nm with a standard deviation of 0.16 nm at a PWM frequency of fPWM100 kHz.
AB - The dynamic behavior and position stability of servo drives are influenced by many parameters. One major influencing parameter is the pulse width modulation (PWM) frequency. With inverters based on wide bandgap semiconductors, the PWM frequency can be increased. This enables a substantial increase in the current control bandwidth. The paper focuses on the influence of the PWM frequency on the dynamics of control loops and position stability, which are derived from theoretical correlations. The theory is verified using a test bench for high dynamic and position stability. The test bench is equipped with a voice coil motor and power electronic with gallium nitride (GaN) power semiconductors for switching frequencies of 100 kHz and over. The achieved position stability, measured with a laser-based comparator at the tool center point, is lower than ±1 nm with a standard deviation of 0.16 nm at a PWM frequency of fPWM100 kHz.
KW - Bandwidth
KW - FPGA
KW - GaN power semiconductors
KW - Position control
KW - Position stability
UR - http://www.scopus.com/inward/record.url?scp=85091134962&partnerID=8YFLogxK
U2 - 10.1109/SPEEDAM48782.2020.9161945
DO - 10.1109/SPEEDAM48782.2020.9161945
M3 - Conference contribution
AN - SCOPUS:85091134962
T3 - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
SP - 23
EP - 29
BT - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
Y2 - 24 June 2020 through 26 June 2020
ER -