Sage Journals: Discover world-class research

Abstract

Power amplifier is a crucial part of the active magnetic bearing system, and its precision characteristic is decisive to the overall systematic performance. The bi-state and tri-state modulations are both widely used in the design of DSPA, and generally there are many approaches to realize the design. DSPA will have different output performance under different modulations. In this paper, we propose a unified design of digital switching power amplifier (DSPA), which can be compatible with different modulations by configuration of hardware only. As many factors will influence the current ripple characteristic of DSPA, an approach based on Fourier series has been proposed to establish the equivalent mathematical model of DSPA under both bi-state and the tri-state modulations. We analyze the approximated theoretical ripple characteristic of DSPA with the unified architecture design discussed, and provide the simulation based on the equivalent mathematical model, then establish the experimental platform to verify the analysis of current ripple characteristic under different conditions. Experimental results show that the ripple characteristic has been influenced mainly by bus voltage, modulation frequency and time constant of load, and the approach proposed in this paper can effectively describe the ripple characteristic of DSPA under different modulations.

Keywords

Current ripple characteristic unified design digital switching power amplifier active magnetic-levitated bearings

Get full access to this article

View all access options for this article.

References

Zhou

et al., Dynamical decoupling and feed-forward control for magnetically levitated planar actuators, Int Journal of Applied Electromagnetics and Mechanics 54(1) (2017), 57–76.

Cheng

Zeng

et al., Mathematical model and control implementation of switching power amplifier in magnetical-leviated system, Journal of Huazhong University of Science and Technology (Natural Science Edition) 43 (2015), 493–496.

Zhou

et al., Measurement of initial phase for movers in magnetically levitated planer actuators, Int Journal of Applied Electromagnetics and Mechanics 49(1) (2015), 91–104.

Zhou

Liu

et al., Analysis of the eddy force disturbance on foil-wound coils in magnetic levitated planar motion, Int Journal of Applied Electromagnetics and Mechanics 46(1) (2014), 299–312.

Cheng

, Data Interchange mechanism in multi-axis ultra-precise synchronous motion control system, Journal of Mechanical Engineering 50(17) (2014), 149–156.

Cheng

and Zhou

, Design of parallel computing architecture for multi-axis ultra-precise synchronous motion control, China Mechanical Engineering 22(19) (2011), 2156–2162.

Chang

L.-X.

and Dong

J.-Y.

, Digital magnetic levitating bearing power amplifier, Journal of Mechanical Engineering 46(20) (2010), 9–14.

Cheng

Chen

Zeng

et al., Reconfiguration rules for loosely-coupled redundant supporting structure in radial magnetic bearings, Int Journal of Applied Electromagnetics and Mechanics 51(2) (2016), 91–106.

Zang

Wang

Qiu

et al., Magnetic bearing switching power amplifier in the current research of tri-state modulation technology, Proceedings of the CSEE 24(9) (2004), 167–172.

10.

Ren

and Fang

, Current-sensing resistor design to include current derivative in PWM h-bridge unipolar switching power amplifiers for magnetic bearings, IEEE Trans Ind Electron 59(12) (2012), 4590–4600.

11.

Mohamed

Y.I.

and Saadany

E.E.

, An improved deadbeat current control scheme with a novel adaptive self-tuning load model for a three-phase PWM voltage-source inverter, IEEE Trans Ind Electron 54(2) (2007), 747–759.

12.

Wen

and Lu

T.-W.

, Decoupling control of a twin rotor MIMO system using robust deadbeat control technique, IET Control Theory Appl 2(11) (2008), 999–1007.

13.

Mollov

Babuska

Abonyi

et al., Effective optimization for fuzzy model predictive control, IEEE Trans Fuzzy Syst 12(5) (2004), 661–675.

14.

Kouro

Cortes

Vargas

et al., Model predictive control – A simple and powerful method to control power converters, IEEE Trans Ind Electron 56(6) (2009), 1826–1838.

15.

Kempf

Messner

Tomizuka

et al., Comparison of four discrete-time repetitive control algorithms, IEEE Control Syst Mag 13(6) (1993), 48–54.

16.

Bojoi

R.J.

Limongi

L.R.

Roiu

et al., Enhanced power quality control strategy for single-phase inverters in distributed generation systems, IEEE Trans Power Electron 26(3) (2011), 798–806.

17.

Zeng

X.-M.

L.-X.

and Liu

Z.-X.

, Five degree of freedom magnetic suspension grinding head electronic control system research, Journal of Nanjing University of Aeronautics and Astronautics 6 (2001), 560–564.

18.

Buding

P.K.

and Werner

, Stiffness of magnetic bearings, In: Proc of the Fourth International Symposium on Magnetic Bearings (1994).

19.

Wang

and Xu

L.-X.

, System model of three-level switching power amplifier for magnetic bearing, In: Proc of International Conference on Measuring Technology and Mechatronics Automation (2009).

20.

Zhang

and Fang

, The harmonic model of the electromagnetic bearing switching power amplifier simulation and experimental research, Proceedings of the CSEE 27(21) (2007), 95–100.

21.

Zhang

and Fang

, The electromagnetic bearing switching power amplifier based on MATLAB modeling and simulation research, Journal of System Simulation 19(11) (2007), 2395–2398.

22.

Wang

and Xu

L.-X.

, Magnetic suspension bearing switching power amplifier equivalent mathematical model, Journal of Electro-Technics 25(4) (2010), 54–58.

23.

Cheng

Liu

Song

et al., Reconfiguration of tightly-coupled redundant supporting structure in active magnetic bearings under the failures of electro-magnetic actuators, Int Journal of Applied Electromagnetics and Mechanics 54(3) (2017), 421–432.

A unified design and the current ripple characteristic analysis of digital switching power amplifier in active magnetic-levitated bearings

Abstract

Keywords

Get full access to this article

References