Powerbox: coreless power conversion technology for high magnetic field applications

Posted 6 February 2017

The new coreless technology platform released by Powerbox is focused on power medical and industrial equipment operating in very high magnetic field environments such as magnetic resonance imaging or particle accelerators.

Powerbox’s GB350 buck-converter module is the first building block in its category that is able to operate safely when exposed to high radiation magnetic fields of 2 to 4 Tesla.

GB350 delivers an output power of 350W and when higher power levels are required it can be paralleled using an interleaving mode thus reducing EMI.

The standard GB350 platform delivers a nominal current of 50A and preset output voltages of 6.8, 3.3 or 1.6V. As part of the Powerbox Custom Power Solution toolbox, other output voltages are available on request. The GB350 has a switching frequency of 600kHz. Equipment installed within the magnetic field often require higher power levels than 350W and also very low EMI.

With a switching frequency of 600kHz and its 4 phase interleave mode, the GB350 has a resultant output frequency of 2.4MHz. This allows easier filtering and extremely fast regulation response times.

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