公开(公告)号：EP2205048A1

公开(公告)日：2010-07-07

申请号：EP09180968.1

申请日：2009-12-30

Applicant: STMicroelectronics Srl

Inventor： Pidutti, Albino ,  Beria, Stefano ,  Adragna, Claudio

IPC: H05B41/282 ,  H05B41/285 ,  H05B41/298 ,  H02M1/32

CPC classification number: H05B41/2828 ,  H02M1/32 ,  H02M1/36 ,  H02M1/38 ,  H05B41/2856 ,  H05B41/2986

Abstract: A solution is proposed for controlling a resonant switching system (110), which includes a first switch (Ml) and a second switch (Mh) in a half-bridge configuration for driving a resonant load (L,105,C1). A corresponding control system (115) includes command means (405-410,4151,415h) for switching on and switching off the switches alternatively according to a working frequency of the switching system. In a solution according to an embodiment of the invention, the control system includes detection means (420-430) for detecting a zeroing (tz) of a working current (I(L)) being supplied by the switching system to the resonant load in a temporal observation window (Tm); the observation window follows each switching off of at least one of the switches (Ml), and has a length equal to a fraction of a working period of the switching system. Correction means (435;535) are then provided for modifying the working frequency in response to each detection of the zeroing in the observation window.

Abstract translation: 提出了一种用于控制谐振开关系统（110）的解决方案，其包括用于驱动谐振负载（L，105，C1）的半桥配置的第一开关（M1）和第二开关（Mh）。 相应的控制系统（115）包括根据切换系统的工作频率交替切换开关的命令装置（405-410,4151,415h）。 在根据本发明的实施例的解决方案中，控制系统包括检测装置（420-430），用于检测由开关系统提供给谐振负载的工作电流（I（L））的归零（tz） 时间观察窗（Tm）; 观察窗口跟随至少一个开关（M1）的每个关闭，并且具有等于开关系统的工作周期的一小部分的长度。 然后提供校正装置（435; 535），用于响应于每次检测观察窗中的归零而修改工作频率。