公开(公告)号：US20170324382A1

公开(公告)日：2017-11-09

申请号：US15525182

申请日：2015-11-27

Applicant: ICEpower a/s

Inventor： Kennet Skov Andersen

IPC: H03F1/26 ,  H03F3/183 ,  H03F3/217

CPC classification number: H03F1/26 ,  H03F3/183 ,  H03F3/217 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/171

Abstract: A self-oscillating amplifier system is disclosed. The system comprises a pulse modulator, a switching power amplification stage and a demodulation filter. Moreover, the system comprises a compensator including a forward filter which is a high order filter including a second order pole pair and a second order zero pair. Hereby it is possible to decrease the phase turn at low frequencies for better stability and increasing the gain of the control loop within the desired bandwidth.

公开(公告)号：US20170317651A1

公开(公告)日：2017-11-02

申请号：US15528934

申请日：2015-11-02

Applicant: ICEpower a/s

Inventor： Kennet Skov Andersen

IPC: H03F1/30 ,  H03F1/02 ,  H03G3/30 ,  H03F3/183 ,  H03F3/217

CPC classification number: H03F1/305 ,  H03F1/02 ,  H03F3/183 ,  H03F3/187 ,  H03F3/217 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/144 ,  H03F2200/156 ,  H03F2200/258 ,  H03F2200/342 ,  H03F2200/426 ,  H03F2200/441 ,  H03F2200/444 ,  H03F2200/66 ,  H03F2200/78 ,  H03G3/301 ,  H03G3/348 ,  H03G2201/106

Abstract: A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close-down of audio amplifier assemblies.

公开(公告)号：US20140077885A1

公开(公告)日：2014-03-20

申请号：US14115371

申请日：2012-06-14

Applicant: BANG & OLUFSEN ICEPOWER A/S

Inventor： Mads Peter Frium

IPC: H02M3/335 ,  H03F3/217

CPC classification number: H02M3/33576 ,  H02M3/33569 ,  H02M2001/0058 ,  H03F3/217 ,  H03F3/2173 ,  Y02B70/1491

Abstract: A power converter with positive and negative supply rail outputs for feeding a single ended class D amplifier, the converter comprising a transformer arrangement, a supply pump reduction arrangement connected between the secondary windings and the positive and negative supply rail outputs, and a boost drive mode switching arrangement. A controller is adapted to control the power converter in a negate drive mode and a boost drive mode, wherein the output voltage in the boost mode is increased by means of the transformer and the boost drive mode switching arrangement. The output voltages on the positive and negative rails can be generated at two different output voltage levels without changing the duty cycle or dead time of the control signals.

Abstract translation: 一种具有正和负电源轨输出的功率转换器，用于馈送单端D类放大器，转换器包括变压器布置，连接在次级绕组与正和负电源轨输出之间的供应泵减速装置，以及升压驱动模式 切换布置。 控制器适于在负驱动模式和升压驱动模式下控制功率转换器，其中升压模式中的输出电压通过变压器和升压驱动模式切换装置增加。 正负极轨上的输出电压可以在两个不同的输出电压电平下产生，而不会改变控制信号的占空比或死区时间。

公开(公告)号：EP2533408A2

公开(公告)日：2012-12-12

申请号：EP11172638.6

申请日：2011-07-05

Applicant: Bang & Olufsen IcePower A/S

Inventor： Frium, Mads Peter

IPC: H02M3/335

Abstract: A power supply arrangement for a single ended class D amplifier (1), including a first primary winding (7) connected in series with a first switch (8) between the positive supply rail and ground, a second primary winding (9) in phase with said first primary winding and connected in series with a second switch (10) between the negative supply rail and ground, and a controller (15) adapted to apply a control signal to said first and second switches, said control signal (Q) having ON-pulses of a predefined pulse time (pt) separated by a dead time (dt).
In use, the primary winding connected to the supply rail with the highest numerical voltage will transform the rail voltage difference to the supply rail with the lowest numerical voltage through the opposite primary winding thus reducing any unbalance between the windings.

Abstract translation: 一种用于单端D类放大器（1）的电源装置，包括与正电源轨和地之间的第一开关（8）串联连接的第一初级绕组（7），同相的第二初级绕组（9） 与所述第一初级绕组串联连接在负电源轨和地之间的第二开关（10），以及适于向所述第一和第二开关施加控制信号的控制器（15），所述控制信号（Q）具有 以死区时间（dt）分隔的预定脉冲时间（pt）的ON脉冲。 在使用中，连接到具有最高数值电压的电源轨的初级绕组将通过相对的初级绕组将轨电压差转换为具有最低数值电压的电源轨，从而减少绕组之间的任何不平衡。

公开(公告)号：EP1994638B1

公开(公告)日：2011-08-03

申请号：EP07713091.2

申请日：2007-03-02

Applicant: Bang & Olufsen IcePower A/S

Inventor： NIELSEN, Karsten ,  LJUSEV, Petar

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F2200/03

Abstract: A Hybrid feedback Controlled Oscillation Modulator (HCOM) has a 1st feedback path from the output voltage of the switching stage Vp and a second feedback path from the filter output Vo, the two feedback paths superposed to provide a weighted state feedback signal Vf. Said state feedback path signal is subtracted from the input signal to form an error signal, said error signal filtered by a forward path compensation block B(s), closing the loop by feeding said pulse modulator, said loop having a transfer function such that self-oscillation can be established in the closed loop system. In a preferred embodiment, the first feedback path has a low pass characteristic and the second feedback path lead characteristic, the first feedback path being weighted by a weighting factor β. Further embodiments include a pure passive realization without forward path means B(s) and the application of 3rd feedback loops to enhance global amplifier performance.

公开(公告)号：EP1588484B1

公开(公告)日：2009-03-11

申请号：EP03780526.4

申请日：2003-11-14

Applicant: Bang & Olufsen IcePower A/S

Inventor： FENGER, Lars, Michael

IPC: H03F3/217 ,  H03F3/38

CPC classification number: H03F3/217 ,  H03F1/32 ,  H03F3/38

公开(公告)号：EP1042865B8

公开(公告)日：2005-01-19

申请号：EP98910630.7

申请日：1998-04-01

Applicant: Bang & Olufsen Icepower A/S

Inventor： Nielsen, Karsten

IPC: H03F3/217 ,  H03F1/32

CPC classification number: H03F3/217

Abstract: To correct for any source of non-linearity and noise introduced in the power amplification of a pulse modulated signal, a correction unit is applied in-between the pulse modulator and the switching power amplification stage. The correction unit is controlled to have a compensating effect, by introducing continuous delays on the individual pulse edges on the basis of error information provided by an error processing block. One preferred embodiment of the invention comprises: a Correction Unit with means to control the delays of the individual pulse edges as a function of a control input signal v?e?; a state feedback block A with compensation; a reference shaping block R to modify the pulsed reference v?r? for optimized error estimation; a difference block to generate an error signal and a compensator C to shape this error. The invention makes it possible to implement practical digital to analog power conversion, with efficient compensation of any non-linearity and noise introduced in the switching power stage and filter, such that great efficiency, high performance and low system complexity is combined. Applications are direct digital to audio power conversion and improved general DC-DC or DC-AC power conversion systems controlled from the digital domain.

公开(公告)号：EP1456951A1

公开(公告)日：2004-09-15

申请号：EP02779847.9

申请日：2002-12-05

Applicant: Bang & Olufsen IcePower A/S

Inventor： NIELSEN, Ole, Neis

IPC: H03K5/1252

CPC classification number: H03K17/6871 ,  H03K17/063

Abstract: This invention relates to a half-bridge driver comprising first and second power switches, connected with their respective current paths in series, a pulse generator for generating a voltage pulse waveform, arranged to drive said first power switch (33), a first current generator (11), for generating a current pulse for each negative flank of said voltage pulse waveform, a second current generator (12), for generating a current pulse for each positive flank of said voltage pulse waveform, and a differential current receiver circuit (27), connected to said first and second current generators, and arranged to generate an output signal (ILATCH) equal to the difference of the currents flowing through said current generators (11, 12), said output signal arranged to drive said second power switch (31).

公开(公告)号：EP1456944A1

公开(公告)日：2004-09-15

申请号：EP02790577.7

申请日：2002-12-16

Applicant: Bang & Olufsen IcePower A/S

Inventor： NIELSEN, Karsten ,  LIND HANSEN, Jesper

IPC: H03F3/38

CPC classification number: H03F3/217 ,  H02M3/1584 ,  H03F2200/351

Abstract: A synchronized controlled oscillation modulator (SCOM) , comprising at least one, Controlled Oscillation Modulator (5) , and synchronizing means (1, 6) connected to said COM modulator. The modulator can comprise several COM modulators, and the synchronizing means can be arranged between the COM systems, so that the oscillation modulator signal is used as synchronization signal. The invention provides significant advantages in performance, topological simplification, improved robustness, stability and efficiency compared to prior art.

公开(公告)号：EP3224943A1

公开(公告)日：2017-10-04

申请号：EP15770862.9

申请日：2015-09-24

Applicant: ICEPOWER A/S

Inventor： SKOV ANDERSEN, Kennet ,  JØRGENSEN, Eskil

IPC: H03F1/30 ,  H03F3/217 ,  H03F1/34

CPC classification number: H03F1/305 ,  H03F1/34 ,  H03F3/183 ,  H03F3/217 ,  H03F2200/03

Abstract: A switching power conversion system and a method for start-up pop minimization in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path including a compensator, a switching power stage and a demodulation filter. The system further comprises a DC-servo and a pre-charging circuit and a sequence control unit configured for providing a start-up sequence where the compensator and DC-servo are correctly biased and a bootstrap capacitor within the switching power stage is charged before the switching power stage is started. Hereby, it is e.g. possible to minimize the audible start-up pop in audio amplifier assemblies.

Abstract translation: 公开了一种用于音频放大器组件中的启动弹出最小化的开关电源转换系统和方法。 开关功率转换系统包括包含补偿器，开关功率级和解调滤波器的正向路径。 所述系统还包括DC伺服和预充电电路以及顺序控制单元，所述顺序控制单元被配置用于提供启动顺序，其中所述补偿器和DC伺服被正确偏置，并且所述开关功率级内的自举电容器在 开关功率级开始。 因此，它是例如 尽可能减少音频放大器组件中的可听见的启动弹出。