A bipolar DC power supply using full-bridge topology as active shunt for magnets

Rodrigues, C. L.; Silva, Angelo Romeu

doi:10.1109/cobep.2009.5347651

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…This also makes possible the reversal of the current, allowing to reset the magnetic memory from the load (hysteresis effect) more easily. Thus, the chosen topology was a full-bridge with unipolar voltage switching [9], which doubles the output ripple frequency, as showed in Figure 2 Considering a lossless converter and a constant input voltage Vc, it can be found the equation of duty cycle concerning to the output voltage:…”

Section: A Output Stagementioning

confidence: 99%

2-Hz ramping mode magnet power supply for particle accelerators

Rodrigues

Limeira

2015

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC)

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Some magnet power supplies for particle accelerators are required to ramp up their output current from close to zero and up to their maximum operation values, with precision tracking of a few Hertz reference signal. Due to the high reactive power of these current sources, one challenge is how to minimize the effects of this low frequency oscillation in the ac mains current. Additionally, the output current must present both low ripple and tracking error in relation to reference, besides good repeatability. This work describes the chosen topology as well the design and some results of a first prototype of a power supply rated 130A/20V, with the final goal of obtaining a 1kA/900V unit.

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Section: A Output Stagementioning

confidence: 99%

2-Hz ramping mode magnet power supply for particle accelerators

Rodrigues

Limeira

2015

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC)

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“…This ratio could be interpreted, in some sense, as the relation between the input full-scale range and the minimum distinguishable input variation, expressed in bits of resolution. Thus this value could be considered for the calculation of the effective quantization level, which would be expressed as: (14) Where:…”

Section: (13)mentioning

confidence: 99%

“…Experimental results are shown in section IV and section V presents the conclusions. Figure 1 shows the power stage of the PS, which is based on a 4-quadrant (4Q) converter [11,14], Figure 2 shows its linearized model. …”

Section: Introductionmentioning

confidence: 99%

Digital control system for high precision power supplies of the new Brazilian synchrotron source

Brunheira

Bonaldo

Rosa

et al. 2013

2013 Brazilian Power Electronics Conference

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This paper proposes an architecture of digital current regulator intended to be used to control the power supplies of the new Brazilian synchrotron light source, called Sirius. It is based on a high-precision Digital to Analog Converter and a modern System on Chip device, which has the capability of performing realtime control tasks together with managing and interface tasks. Despite this system will be used to control many kinds of power supplies, it was validated in a 100 W power supply, which was previously developed to be used in the present Synchrotron Light Source.

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“…Figure 3 shows a simplified schematic of the power circuit of this power supply. The topology of this model is based on full-bridge converter, using PWM unipolar switching [4]. In this kind of switching, two identical PWM signals shifted by 180 o drive each one of the opposite switches related to a given output polarity (each switch in a side of the full-bridge, Q 1 and Q 3 , for example).…”

Section: )mentioning

confidence: 99%