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1. 发明公开

EP3084782A1 HIGH VOLTAGE TRANSFORMER COMPRISING A COIL BOBBIN FOR CARRYING A HIGH VOLTAGE WINDING 有权转让
标题翻译：与线圈主体高压变压器携带高压绕组
公开(公告)号：EP3084782A1
公开(公告)日：2016-10-26
申请号：EP14812213.8
申请日：2014-12-11
申请人： Koninklijke Philips N.V.
发明人： ACKERMANN, Bernd , EFFTINGE, Wolfgang , GARCIA TORMO, Albert , HATTRUP, Christian , KRÖGER, Ralf , SCHEEL, Thomas , LÜRKENS, Peter , WISMANS, Antonius Johannes Joseph
IPC分类号： H01F27/28 , H01F27/32
CPC分类号： H01F27/323 , H01F27/28 , H01F27/2823 , H01F27/2885 , H01F27/325 , H05G1/10
摘要： A high voltage transformer (50) includes a magnetic core (5); a low voltage winding (10); a high voltage winding (20); at least one inner sleeve (30); and a coil bobbin (24) for carrying the high voltage winding (20). The coil bobbin (24) is configured to be arranged inside the at least one inner sleeve (30) and configured to be attached to the at least one inner sleeve (30) at an outer perimeter of the at least one inner sleeve (30). The coil bobbin (24) includes at least one field-control electrode (22), which is adapted to shape an electric field generated by the high voltage winding (20).

2. 发明公开

EP2748624A1 GRADIENT AMPLIFIER WITH COMPENSATION FOR DEAD TIME AND FORWARD VOLTAGE 审中-公开
标题翻译：带死区和河流功补偿的梯度放大器
公开(公告)号：EP2748624A1
公开(公告)日：2014-07-02
申请号：EP12781165.1
申请日：2012-09-20
申请人： Koninklijke Philips N.V. , Philips Deutschland GmbH
发明人： SCHEEL, Thomas , HATTRUP, Christian
IPC分类号： G01R33/385 , H03F3/217
CPC分类号： G01R33/387 , G01R33/3852 , G01R33/543 , G01R33/56572 , H03F3/2173
摘要： The present invention relates to a method for compensating non-linearities of a gradient amplifier (1) for powering a gradient coil (16), wherein the non-linearities are caused by the finite dead time of the amplifier and/or by a forward voltage drop, the gradient amplifier (1) comprising a controllable full bridge (8) and an output filter (9), whereby the full bridge (8) is controlled to provide a desired coil current (ic), comprising the steps of receiving a desired duty cycle (aeff) of the gradient amplifier (1), measuring an input current (ifilt) and an output voltage (ucfilt) of the output filter (9), evaluating an modulator duty cycle (amod) as a function of the desired duty cycle (aeff) and the measured input current (ifilt) and the measured output voltage (ucfilt), and providing the modulator duty cycle (amod) for controlling the full bridge (8). The present invention further relates to a gradient amplifier (1) for powering a gradient coil (16) comprising a controllable full bridge (8) comprising at least two half bridges (10), each half bridge (10) having at least two power switches (11) connected in series, whereby each half bridge (10) is tapped at its center point between two the power switches (11), and an output filter (9) connected to the tapped center points of the half bridges (10), a controller unit (4) for providing a desired duty cycle (aeff) of the gradient amplifier (1), a compensation block (5) for providing an modulator duty cycle (amod) as a compensation of the desired duty cycle (aeff) according to any of the above method claims, and a modulator (6) for controlling the power switches (11) according to the modulator duty cycle (amod) provided by the compensation unit (5).

3. 发明公开

EP2656092A1 STATE SPACE FEEDBACK CONTROLLER IN THE DIGITAL DOMAIN FOR AN MRI GRADIENT COIL POWER SUPPLY 有权转让
标题翻译：状态空间反馈控制在数字域中FOR A MRI梯度线圈的功率
公开(公告)号：EP2656092A1
公开(公告)日：2013-10-30
申请号：EP11807781.7
申请日：2011-12-15
申请人： Koninklijke Philips N.V. , Philips Intellectual Property & Standards GmbH
发明人： SCHEEL, Thomas , HATTRUP, Christian
IPC分类号： G01R33/385
CPC分类号： G01R33/3852
摘要： The invention relates to a state space feedback controller operating in the digital domain for the regulation of the current supply to MRI gradient coils from a multiple-bridge PWM power amplifier. The Pl-controller comprises an integration part (for the integration of the difference between the demand current and the measured gradient coil current) and a subsequent P-controlled system which in turn comprises a delay compensator/stabilizer and a plant. The delay compensator/stabilizer comprises a multi-path feedback loop by means of which its digital output signal is fed back through delay blocks, on the one hand, and through filter units, on the other hand, whereby the filter units model the transfer functions of a gradient coil output filter for the gradient coil voltage and the output current of the amplifier inverter units, respectively. In the plant, a filter unit, which models the gradient coil transfer function, is connected in series to a delay chain for the delay of the measurement value of the gradient coil current.

4. 发明授权

EP3084782B1 HIGH VOLTAGE TRANSFORMER COMPRISING A COIL BOBBIN FOR CARRYING A HIGH VOLTAGE WINDING 有权转让
公开(公告)号：EP3084782B1
公开(公告)日：2019-05-22
申请号：EP14812213.8
申请日：2014-12-11
申请人： Koninklijke Philips N.V.
发明人： ACKERMANN, Bernd , EFFTINGE, Wolfgang , GARCIA TORMO, Albert , HATTRUP, Christian , KRÖGER, Ralf , SCHEEL, Thomas , LÜRKENS, Peter , WISMANS, Antonius Johannes Joseph
IPC分类号： H01F27/28 , H01F27/32

5. 发明授权

EP2656092B1 STATE SPACE FEEDBACK CONTROLLER IN THE DIGITAL DOMAIN FOR AN MRI GRADIENT COIL POWER SUPPLY 有权转让
标题翻译：状态空间反馈控制在数字域中FOR A MRI梯度线圈的功率
公开(公告)号：EP2656092B1
公开(公告)日：2015-07-15
申请号：EP11807781.7
申请日：2011-12-15
申请人： Koninklijke Philips N.V. , Philips Intellectual Property & Standards GmbH
发明人： SCHEEL, Thomas , HATTRUP, Christian
IPC分类号： G01R33/385
CPC分类号： G01R33/3852

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