发明名称 |
A method and device for power conversion |
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 |
AU5786298(A) |
申请公布日期 |
1998.08.18 |
申请号 |
AU19980057862 |
申请日期 |
1998.01.15 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
THOMAS SAHLSTROM;CHRISTER THOREN |
分类号 |
H02M1/34;H02M3/158;H03K17/0814 |
主分类号 |
H02M1/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|