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发明申请
US20090072746A1 RESONANT IGNITOR CIRCUIT FOR LAMP WITH A VARIABLE OUTPUT CAPACITANCE BALLAST 审中-公开
具有可变输出电容压力的灯的谐振点火电路

RESONANT IGNITOR CIRCUIT FOR LAMP WITH A VARIABLE OUTPUT CAPACITANCE BALLAST
摘要：
A resonant igniter circuit (11) employs a switch ignition branch and a resonant ignition branch. The switch ignition branch includes a pair of ignition switches (M1, M2) connected in series with a switch node (N1). The resonant ignition branch includes an ignition coil (L2) and an ignition transformer (T2). Ignition coil (L2) is connected in series with switch node (N1) and a primary winding of ignition transformer (T2). In operation, a serial inductance of ignition coil (L2) is at least fifty (50) times greater than a resonant inductance of ignition transformer (T2) and ignition transformer (T2) has an air-gapped core between a primary winding and a secondary winding to thereby facilitate an impedance of a power stage of the resonant ignition branch as seen from a source as always being inductive over an entire range of output capacitance.
摘要（中）：

谐振点火器电路（11）采用开关点火支路和谐振点火支路。 开关点火支路包括与开关节点（N1）串联连接的一对点火开关（M1，M2）。 共振点火分支包括点火线圈（L2）和点火变压器（T2）。 点火线圈（L2）与开关节点（N1）和点火变压器（T2）的初级绕组串联。 在操作中，点火线圈（L2）的串联电感比点火变压器（T2）的谐振电感大至少五十（50）倍，而点火变压器（T2）在初级绕组和次级绕组之间具有空气隙的铁芯 从而有助于谐振点火支路的功率级的阻抗，从源极看，在整个输出电容范围内始终是电感的。

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