发明名称 |
Circuit device for driving an AC electric load |
摘要 |
<p>The invention relates to a circuit device (1) for driving an A.C. electric load (M), which device is of the type incorporating a rectifying bridge (2) having a first input (A) connected to one terminal (H) of the electric load (M) and a second input (A') connected to an plug (5) of an A.C. mains supply, the rectifying bridge (2) having output terminals (B,B') connected to a power switch (3) which is controlled by an electric signal (PWM). The device comprises a first circuit loop-back path (7) connected in parallel to the electric load (M) and a second circuit loop-back path (8) connected in parallel to the electric load (M), the first (7) and second (8) paths being alternately activated by the positive and negative half-waves of the mains supply when the switch (3) is in its "off" state. <IMAGE></p> |
申请公布号 |
EP1017156(A1) |
申请公布日期 |
2000.07.05 |
申请号 |
EP19980830809 |
申请日期 |
1998.12.31 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
MILAZZOTTO, ANTONINO;DI GUARDO, MARIO;CUCUCCIO, ANTONINO;NICOSIA, NICOLA |
分类号 |
H02M5/293;H02P25/10;(IPC1-7):H02M5/293;H02P7/638 |
主分类号 |
H02M5/293 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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