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公开(公告)号：DE60011416T2
公开(公告)日：2005-06-09
申请号：DE60011416
申请日：2000-11-15
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： WAGNER BERNHARD , MAERTENS OLAF
Abstract: The invention relates to a power supply unit with an inverter which cooperates with a resonant circuit (L, C) and can be controlled so as to adjust the output power by means of a control unit (6). The power supply unit is characterized notably by the fact that it is formed by a first and a second switching unit (S1, S4; S2, S3) whereby a voltage of a first polarity can be applied to the resonant circuit (L, C) in a first switching state and a voltage of a second polarity can be applied thereto in a second switching state, the switching states being switchable by the control unit (6) in such a manner that in a first mode of operation for low output powers the output power can be adjusted by changing the duration of the switching states at an essentially constant switching frequency fs which is at least a predetermined factor lower than the resonance frequency fres of the resonant circuit, and that in a second mode of operation for high output powers the output power can be adjusted by changing the switching frequency in the range of the resonance frequency.
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公开(公告)号：DE60011416D1
公开(公告)日：2004-07-15
申请号：DE60011416
申请日：2000-11-15
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： WAGNER BERNHARD , MAERTENS OLAF
Abstract: The invention relates to a power supply unit with an inverter which cooperates with a resonant circuit (L, C) and can be controlled so as to adjust the output power by means of a control unit (6). The power supply unit is characterized notably by the fact that it is formed by a first and a second switching unit (S1, S4; S2, S3) whereby a voltage of a first polarity can be applied to the resonant circuit (L, C) in a first switching state and a voltage of a second polarity can be applied thereto in a second switching state, the switching states being switchable by the control unit (6) in such a manner that in a first mode of operation for low output powers the output power can be adjusted by changing the duration of the switching states at an essentially constant switching frequency fs which is at least a predetermined factor lower than the resonance frequency fres of the resonant circuit, and that in a second mode of operation for high output powers the output power can be adjusted by changing the switching frequency in the range of the resonance frequency.
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公开(公告)号：WO2006079985A2
公开(公告)日：2006-08-03
申请号：PCT/IB2006050278
申请日：2006-01-26
Applicant: KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , WAGNER BERNHARD , FREIHEIT-JENSEN BERND , VOLLERTSEN CHRISTIAN , LOEF CHRISTOPH , PAUL CORNELIUS , MUELLER FRANK , HOFFMANN KLAUS , KLINGELHOELLER MARC , REXHAUSEN WOLFGANG
Inventor： WAGNER BERNHARD , FREIHEIT-JENSEN BERND , VOLLERTSEN CHRISTIAN , LOEF CHRISTOPH , PAUL CORNELIUS , MUELLER FRANK , HOFFMANN KLAUS , KLINGELHOELLER MARC , REXHAUSEN WOLFGANG
Abstract: A power supply power supply comprising a DC voltage supply, a control unit and a plurality of high voltage channels is suggested. Each high voltage channel includes an inverter, a resonance circuit, a transformer, and a rectifier. The resonance circuit cooperates with the inverter. The inverter is formed by a first switching unit and a second switching unit whereby a voltage of a first polarity can be applied to the resonance circuit in a first switching state, whereas a voltage of a second polarity can be applied to the resonance circuit in a second switching state. The switching states can be switched by the control unit in such a manner that in a first mode of an operation for high output power, the output power can be adjusted by changing the switching frequency in the range of the resonance frequency. In a second mode of operation for low output power, the output power can be adjusted by changing the duration of the switching state at an essentially constant switching frequency, which is at least a predetermined factor lower than the resonance frequency of the resonance circuit. In addition to that a method for operating this kind of power supply with particularly low output power is proposed.
Abstract translation: 建议包括直流电压源，控制单元和多个高压通道的电源电源。 每个高压通道包括一个反相器，一个谐振电路，一个变压器和一个整流器。 谐振电路与变频器配合使用。 逆变器由第一开关单元和第二开关单元形成，从而第一极性的电压可以在第一开关状态下施加到谐振电路，而第二极性的电压可以施加到谐振电路 第二切换状态。 可以通过控制单元切换开关状态，使得在高输出功率的操作的第一模式中，可以通过改变谐振频率范围内的开关频率来调节输出功率。 在用于低输出功率的第二种操作模式中，可以通过以基本恒定的开关频率改变开关状态的持续时间来调节输出功率，该开关频率至少是比谐振电路的谐振频率低的预定因子。 除此之外，还提出了以特别低的输出功率操作这种电源的方法。
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公开(公告)号：DE59510860D1
公开(公告)日：2004-03-25
申请号：DE59510860
申请日：1995-11-29
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： VAN DER BROECK DR ING , LOEF CHRISTOPH , NEGLE HANS , WAGNER BERNHARD , WIMMER MARTIN
Abstract: The power supply stage is used to supply the X-ray tube (4) via a HV transformer (3) with 2 groups of primary and secondary windings (16, 31; 26, 32) which are wound on the same transformer core. The coupling factor between the primary windings (16, 26) of the different winding groups is less than the coupling factor between the primary and secondary windings of the same winding group. Each of the primary windings is coupled to a respective current regulator (1, 2) with a fixed operating frequency and an individually regulated pulse ratio, providing overlapping voltage pulses.
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