发明名称 |
Förfarande och anordning för effektomvandling. |
摘要 |
As a front end power factor correction circuit in a rectifier a boost conversion topology is often used. A great problem with this topology is the rectifier diode. This diode must be of a high voltage type in a boost application and will therefore have a large reverse-recovery current before it will block the voltage. This current may cause large losses. With the solution according to the invention care will be taken to the recovery current in a more effective way than any earlier solution has obtained. The proposed circuit comprises essentially a boost circuit, where a main and first inductor L1(3) and a main and first diode D1(4) are connected in series from an input to an output and a main and first capacitor C1(5) from an output to ground. A main and first transistor M1(1) is connected from between the first inductor L1(3) and the first diode D1(4) to ground. An auxiliary and second inductor L11(6), a second diode D11(7) and a second transistor M11(2) are connected in series from between the first inductor L1(3) and the first diode D1(4) to ground. Two other diodes a third and fourth diode D12(10), D13(9) are connected in series from between the second diode D11(7) and the second transistor M11(2) to the output. |
申请公布号 |
SE511059(C2) |
申请公布日期 |
1999.07.26 |
申请号 |
SE19970000210 |
申请日期 |
1997.01.24 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
THOMAS *SAHLSTROEM;CHRISTER *THOREN |
分类号 |
H02M1/34;H02M3/158;H03K17/0814;(IPC1-7):H02M3/158 |
主分类号 |
H02M1/34 |
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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