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公开(公告)号：US4032831A
公开(公告)日：1977-06-28
申请号：US635156
申请日：1975-11-24
CPC分类号： H02M7/515
摘要： In an inverter apparatus including a plurality of parallel branch circuits connected across a D.C. source, each including a pair of serially connected controllable switching elements, and a plurality of semiconductor elements connected in parallel opposition with respective switching elements, a D.C. reactor is connected on the D.C. side or A.C. side of the inverter and a circuit is connected across the D.C. reactor for preventing attenuation of the current flowing through the D.C. reactor during the OFF period of the switching elements. A source of control pulses is provided for rendering ON respective controllable switching elements each for a 120.degree. interval of the output alternating current. The source of control pulse includes means for chopping the current flowing through each controllable switching element at a predetermined modulation frequency for the former or latter 60.degree. of the 120.degree. interval.
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公开(公告)号：US3983463A
公开(公告)日：1976-09-28
申请号：US501783
申请日：1974-08-29
申请人： Akira Nabae , Takeo Shimamura
发明人： Akira Nabae , Takeo Shimamura
CPC分类号： H02P27/08 , B60L11/08 , H02P27/045 , H02P27/048 , B60L2220/12 , H02P2207/01 , H02P27/047 , Y02T10/646 , Y02T10/648 , Y02T10/70 , Y02T10/7077
摘要： In a method and apparatus for controlling the speed of an induction motor energized from a source of variable frequency, e.g. a controllable inverter, a control signal which is a function of the primary current of the induction motor is produced, a predetermined slip frequency pattern signal is generated in accordance with the control signal, and the source is controlled in accordance with the slip frequency pattern signal for controlling the operating frequency. By suitably determining the shape of the slip frequency pattern signal it is possible to operate the induction motor with either one of normal induction motor characteristic, DC series motor characteristic, DC shunt motor characteristic, DC weak field motor characteristic and DC compound motor characteristic, and to operate the induction motor for smooth and continuous power regeneration.
摘要翻译： 在用于控制从可变频率源通电的感应电动机的速度的方法和装置中，例如， 产生可控逆变器，作为感应电动机的初级电流的函数的控制信号，根据控制信号生成预定的转差频率模式信号，根据转差频率模式信号来控制源 用于控制工作频率。 通过适当地确定滑差频率模式信号的形状，可以利用正常感应电动机特性，直流串联电动机特性，直流并联电动机特性，直流弱电动机特性和直流复合电动机特性中的任何一个来操作感应电动机，以及 操作感应电机，实现平稳连续的动力再生。
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公开(公告)号：US4238823A
公开(公告)日：1980-12-09
申请号：US953034
申请日：1978-10-20
申请人： Akira Nabae
发明人： Akira Nabae
CPC分类号： H02M7/5236
摘要： The inverter comprises a plurality of branch circuits connected across a DC source. Each branch circuit includes a pair of main controlled semiconductor switching elements, a diode and a smoothing reactor which are connected between the pair of main controlled semiconductor switching elements. A commutating circuit including a commutating capacitor, a commutating reactor and an auxiliary reverse conduction type controlled semiconductor switching element is connected in parallel with each main controlled semiconductor switching element. A pair of circulating diodes are provided for each branch circuit and connected between respective commutating capacitors thereof and the positive and negative sides of the DC source.
摘要翻译： 逆变器包括跨越DC源连接的多个分支电路。 每个分支电路包括一对主控半导体开关元件，二极管和平滑电抗器，它们连接在一对主控半导体开关元件之间。 包括整流电容器，整流电抗器和辅助反向导通型受控半导体开关元件的整流电路与每个主控半导体开关元件并联连接。 为每个分支电路提供一对循环二极管，并连接在其各自的换向电容器与直流电源的正极和负极之间。
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