公开(公告)号：EP0278369A3

公开(公告)日：1989-03-15

申请号：EP88101484.9

申请日：1988-02-02

申请人： HITACHI, LTD.

发明人： Matsui, Takayuki ,  Okuyama, Toshiaki ,  Matsutake, Mitsugu ,  Takahashi, Junichi ,  Ito, Masami

IPC分类号： H02P7/628 ,  H02M1/084 ,  H02M5/27

CPC分类号： H02P27/06 ,  H02M7/162

摘要： A converter circuit includes three-phase unit converters (2a, 2b) connected in cascade in two stages for supplying electric power to a load (4; 8). In a region in which the converter output voltage ratio is small, the firing phases of both converters are so set that a phase difference of 120° makes appearance there­between, while in a region in which the converter output voltage ratio is large, the firing phases are so set as to have a phase difference of 60° therebetween, whereby an angular difference of 90° to 30° is caused to occur constantly between the phases of voltage ripple compo­nents of the unit converters. Power factor of a power supply source is improved while ripple in the output voltage of the converter circuit is reduced.

公开(公告)号：EP0278369B1

公开(公告)日：1995-05-03

申请号：EP88101484.9

申请日：1988-02-02

申请人： HITACHI, LTD.

发明人： Matsui, Takayuki ,  Okuyama, Toshiaki ,  Matsutake, Mitsugu ,  Takahashi, Junichi ,  Ito, Masami

IPC分类号： H02P7/628 ,  H02M1/084 ,  H02M5/27

CPC分类号： H02P27/06 ,  H02M7/162

公开(公告)号：EP0278369A2

公开(公告)日：1988-08-17

申请号：EP88101484.9

申请日：1988-02-02

申请人： HITACHI, LTD.

发明人： Matsui, Takayuki ,  Okuyama, Toshiaki ,  Matsutake, Mitsugu ,  Takahashi, Junichi ,  Ito, Masami

IPC分类号： H02P7/628 ,  H02M1/084 ,  H02M5/27

CPC分类号： H02P27/06 ,  H02M7/162

摘要： A converter circuit includes three-phase unit converters (2a, 2b) connected in cascade in two stages for supplying electric power to a load (4; 8). In a region in which the converter output voltage ratio is small, the firing phases of both converters are so set that a phase difference of 120° makes appearance there­between, while in a region in which the converter output voltage ratio is large, the firing phases are so set as to have a phase difference of 60° therebetween, whereby an angular difference of 90° to 30° is caused to occur constantly between the phases of voltage ripple compo­nents of the unit converters. Power factor of a power supply source is improved while ripple in the output voltage of the converter circuit is reduced.

摘要翻译： A转换器电路包括三级单元转换器（2a，2b），其级联连接两级，用于向负载（4; 8）供电。 在转换器输出电压比小的区域中，两个转换器的点火相位设定为使120°的相位差出现，而在转换器输出电压比大的区域中，烧成阶段 被设定为具有60°的相位差，从而在单位转换器的电压纹波分量的相位之间恒定地发生90°至30°的角度差。 改善了电源的功率因数，同时降低了转换器电路输出电压的波动。