A High-Current Low-Pass Filter for Magnet Power Supplies

Praeg, W. F.

doi:10.1109/tieci.1970.229868

Cited by 34 publications

(9 citation statements)

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“…A permanent 300 resistor is connected across each 12-pulse rectifier, which guarantees the rectifier turn-on for highly inductive loads [1], [9]. Parameters of the FPG and rectifier module are shown in Table II. A dc passive filter (DCPF) is connected in parallel at the output of the rectifier; it consists of a single tuned filter branch, a capacitor branch and an damping branch [10], [11]. According to the parameters detailed in the Table III, the dc passive filter acts like a high-pass filter, providing a low impedance path to frequencies higher than 100 Hz and thus sharply decreasing the flat-top ripple.…”

Section: A Fpg and Rectifier Modulementioning

confidence: 99%

Design and Analysis of a Combined Power Supply for High-Field Quasi-Continuous Magnets

Ding

Liu

Duan

et al. 2012

IEEE Trans. Appl. Supercond.

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The high-field quasi-continuous magnets (QCM) are of great interest for scientific experiments that require long pulse duration and in particular a field pulse with a flat-top. For the QCM, the power supply is a real challenge. At the Wuhan National High Magnetic Field Center (WHMFC), it is planned to realize a 45 T/500 ms flat-top field by the series combination of a 0.6 kV/35 kA battery bank and a 12-pulse rectifier that is powered by a 100 MVA/100 MJ flywheel pulse generator (FPG). In order to reduce the dc current ripple, a dc passive filter is connected in parallel with the rectifier. The simulation of the pulse shape with respect to the voltage profile supplied by the power supply takes the resistance of the magnet into account; this increases with temperature as a function of coil current. The configuration and the associated control strategy are presented in this paper. A simulation model of the combined power supply system is developed and compared with the model of a single rectifier supply system. Results are provided to validate the proposed method.Index Terms-12-pulse rectifier, flywheel pulse generator, highfield, lead acid batteries, quasi-continuous magnets.

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Section: A Fpg and Rectifier Modulementioning

confidence: 99%

Design and Analysis of a Combined Power Supply for High-Field Quasi-Continuous Magnets

Ding

Liu

Duan

et al. 2012

IEEE Trans. Appl. Supercond.

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“…The switching frequency was adjusted in 40kHz, what gives an output frequency of 80kHz. The output filter is a Praeg type [5].…”

Section: )mentioning

confidence: 99%

A new model of bipolar power supplies for LNLS steering magnets using full-bridge topology

Rodrigues

Silva

2011

XI Brazilian Power Electronics Conference

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“…The filter design employed is a variation of the classical Praeg filter [3], arranged to be symmetrical around power ground. The filter is set to be critically damped, and attenuates both the differential and common-mode components of the output ripple.…”

Section: Power Modulesmentioning

confidence: 99%