SWITCHING -FREQUENCY -CONTROLLED SWITCH -MODE POWE

专利名称：SWITCHING -FREQUENCY -CONTROLLED

SWITCH -MODE POWER SUPPLY UNIT FORPOWERING MAGNETIC RESONANCE SYSTEMGRADIENT COILS

发明人：HAM, Cornelis Leonardus

Gerardus,HOLLANDER, MartinAlexander,VAN HELVOORT, MarinusJohannes Adrianus Maria,BAX, Michael Paul

申请号：EP13732249.1申请日：20130514公开号：EP2856193A1公开日：20150408

摘要：A power supply unit (130) powers at least one gradient coil (128) of a magneticresonance (MR) examination system (110) with a main magnet (114) having, in at least onestate of operation, a substantially static magnetic field strength, and with an MRmeasurement signal bandwidth. The power supply unit (130) includes a switched-modepower converter (134) for powering the at least one gradient coil (128), and including atleast one switching member provided to switch between a conducting state configurationand an essentially non-conducting state configuration at a first fundamental switchingfrequency (fSW). A pulse control unit (132) is designed to provide switching pulses at thefirst fundamental switching frequency (fSW) for controlling the switching of the at leastone switching member. Upon triggering by a trigger signal (142), the pulse control unit(132) is provided to change the first fundamental switching frequency (fSW) to at least a

second fundamental switching frequency (fSW).

申请人：Koninklijke Philips N.V.

地址：High Tech Campus 5 5656 AE Eindhoven NL

国籍：NL

代理机构：Steffen, Thomas

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