DC-link compensation method for slim DC-link drives fed by soft grid

Author

Mathe, Laszlo ; Andersen, Henrik Rosendal ; Lazar, Radu ; Ciobotaru, Mihai

Author_Institution

Danfoss Drives A/S, Graasten, Denmark

fYear

2010

fDate

4-7 July 2010

Firstpage

1236

Lastpage

1241

Abstract

Slim DC-link PWM (AC) drives for low-performance applications are emerging on the market. Such drives equipped with a small DC-link capacitance exhibit instability tendencies, if installed on a soft line, giving a degraded performance. The total harmonic distortion (THD) and the partially weighted harmonic distortion (PWHD) of the line current are degraded, if resonance between the line impedance and the DC-link capacitance occurs. Likewise, the motor performance is affected negatively giving extra torque ripple, vibration and acoustic-noise emission. This paper proposes a novel DC-link compensation method, which ensures the stability of the slim DC-link on a soft grid. The proposed compensation method may be used for open- and closed-loop control schemes, requiring a small overhead in the digital implementation.

Keywords

closed loop systems; compensation; drives; open loop systems; vibrations; DC-link PWM drives; DC-link capacitance; DC-link compensation method; acoustic-noise emission; closed-loop control; compensation method; open-loop control; partially weighted harmonic distortion; slim DC-link drives fed; soft grid; torque ripple; total harmonic distortion; vibration; Capacitors; Current measurement; Damping; Delay; Frequency measurement; Inductance; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics (ISIE), 2010 IEEE International Symposium on

Conference_Location

Bari

Print_ISBN

978-1-4244-6390-9

Type

conf

DOI

10.1109/ISIE.2010.5636989

Filename

5636989