发明名称 |
Switching power supply |
摘要 |
A switching power supply, in which a series circuit consisting of a primary winding of a transformer and a controllable switch is connected with a DC power source and a secondary winding of the transformer is connected with a first voltage source outputting the voltage developed across the secondary winding during the on-period of the controllable switch and a second voltage source storing the exciting energy of the transformer during the off-period of the controllable switch by using the exciting inductance of the transformer as a current source, a series circuit consisting of the first and the second voltage sources being connected with a load. Owing to this construction, even if voltage-current characteristic of a load having constant voltage characteristic, such as a magnetron, vary due to variations in the temperature, etc., the output voltage is automatically compensated and a stable electric power can be supplied to the load.
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申请公布号 |
US4777575(A) |
申请公布日期 |
1988.10.11 |
申请号 |
US19870031533 |
申请日期 |
1987.03.23 |
申请人 |
HITACHI LTD.;HITACHI NISSHIN ELECTRONICS, CO.;HITACHI DEVICE ENG. CO., LTD. |
发明人 |
YAMATO, IKUO;TOKUNAGA, NORIKAZU;AMANO, HISAO;NOGUCHI, SHOICHI;ODAKA, TERUAKI |
分类号 |
H05B6/66;H05B6/68;(IPC1-7):H02M3/335 |
主分类号 |
H05B6/66 |
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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