公开(公告)号：US4335423A

公开(公告)日：1982-06-15

申请号：US198451

申请日：1980-10-20

申请人： Akio Koizumi ,  Hiroshi Nakazawa ,  Akira Endo

发明人： Akio Koizumi ,  Hiroshi Nakazawa ,  Akira Endo

IPC分类号： H01F19/00 ,  H01F27/28 ,  H01F27/38 ,  H02M3/335

CPC分类号： H01F19/00 ,  H01F27/289 ,  H01F27/38

摘要： A transformer includes a magnetic core; an input or primary winding structure wound on a bobbin secured to the magnetic core and including first and second primary winding portions; an output or secondary winding structure wound on the bobbin and including first and second secondary winding portions; and a control or tertiary winding structure wound on the bobbin and including first and second tertiary winding portions with the first tertiary winding portion being comprised of first and second windings connected in series, the primary, secondary and tertiary winding structures being wound on the bobbin in the order of the first primary winding portion, the first winding of the first tertiary winding portion, the first secondary winding portion, the second secondary winding portion, the second winding of the first tertiary winding portion, the second primary winding portion, and the second tertiary winding portion, so as to provide a high degree of magnetic coupling between the first primary and secondary winding portions and the first tertiary winding portion and between the second primary and secondary winding portions and the first tertiary winding portion and so as to provide noise suppression between the first primary and secondary winding portions and between the second primary and secondary winding portions.

摘要翻译： 变压器包括磁芯; 缠绕在固定到磁芯上的线轴上并包括第一和第二初级绕组部分的输入或初级绕组结构; 缠绕在线轴上的输出或次级绕组结构，包括第一和第二次级绕组部分; 以及缠绕在线轴上的控制或三次绕组结构，并且包括第一和第二三次绕组部分，其中第一三次绕组部分由串联连接的第一和第二绕组组成，主，次和三次绕组结构缠绕在线轴上 第一初级绕组部分，第一第三绕组部分的第一绕组，第一次级绕组部分，第二次级绕组部分，第一第三绕组部分的第二绕组，第二初级绕组部分和第二绕组部分的顺序 三次绕组部分，以便在第一初级和次级绕组部分和第一三级绕组部分之间以及在第二级次级绕组部分和第二级绕组部分之间提供高度的磁耦合，以便提供噪声抑制 在第一初级和次级绕组部分之间以及在第二初级之间 y和次级绕组部分。

公开(公告)号：US4476436A

公开(公告)日：1984-10-09

申请号：US373507

申请日：1982-04-26

申请人： Akio Koizumi ,  Hiroshi Yamagishi

发明人： Akio Koizumi ,  Hiroshi Yamagishi

IPC分类号： H03F3/20 ,  H03F3/217 ,  H03F3/387

CPC分类号： H03F3/217

摘要： A power amplifier for use in a PWM signal includes a pulse width modulation signal generating circuit proportional to an amplitude of an input signal, an amplitude modulating circuit for amplitude-modulating the pulse width modulating signal in accordance with the level of the input signal and a power amplifying stage driven by the pulse width modulation signal which was amplitude-modulated. The amplitude modulating circuit or modulator is comprised of, by way of example, a pair of level shifting circuits (21) and (22), each being supplied with the input signal, a pair of switching circuits (23) and (24) for switching the respective outputs of these level shifting circuits by the pulse width modulation signal and an adder (25) for adding the outputs from these switching circuits, wherein this adder can produce at its output a pulse width modulation signal which is amplitude-modulated and the power amplifying stage utilizing bipolar transistors can efficiently be driven by this pulse width modulation signal.

摘要翻译： PCT No.PCT / JP81 / 00188 Sec。 371日期1982年4月26日 102（e）日期1982年4月26日PCT提交1981年8月25日PCT公布。 出版物WO82 / 00739 日期为1982年3月4日。用于PWM信号的功率放大器包括与输入信号的幅度成比例的脉宽调制信号发生电路，用于根据该信号幅度调制脉宽调制信号的幅度调制电路 输入信号的电平和由被调幅的脉宽调制信号驱动的功率放大级。 幅度调制电路或调制器例如包括一对电平移位电路（21）和（22），每个电平移位电路分别提供有输入信号，一对开关电路（23）和（24），用于 通过脉冲宽度调制信号切换这些电平移位电路的各个输出，以及用于将来自这些开关电路的输出相加的加法器（25），其中该加法器可以在其输出端产生被调幅的脉宽调制信号， 利用双极晶体管的功率放大级可以有效地由该脉冲宽度调制信号驱动。

公开(公告)号：US4236198A

公开(公告)日：1980-11-25

申请号：US968135

申请日：1978-12-11

申请人： Mitsuo Ohsawa ,  Akio Koizumi ,  Hiroshi Nakazawa

发明人： Mitsuo Ohsawa ,  Akio Koizumi ,  Hiroshi Nakazawa

IPC分类号： H02H7/12 ,  H02M1/00 ,  H02M1/36 ,  H02M3/335

CPC分类号： H02M1/36 ,  H02H7/12 ,  Y10S323/908

摘要： A switching regulator includes an inrush current protective resistor and a starter circuit for a pulse width modulator consisting of a starting resistor and a capacitor. At initial starting mode, the inrush current protective resistor is connected to the starter circuit, and after starting both of the inrush current protective resistor and starting resistor are disconnected so as to reduce power dissipation or consumption thereby. At the same time, a DC voltage source for the pulse width modulator is derived from a rectified secondary voltage through the starting capacitor.

摘要翻译： 开关稳压器包括浪涌电流保护电阻器和用于由起动电阻器和电容器组成的脉宽调制器的起动电路。 在初始启动模式下，浪涌电流保护电阻连接到起动电路，启动两个浪涌电流保护电阻和起动电阻后，断开，以减少功耗或消耗。 同时，脉冲宽度调制器的直流电压源通过起动电容器的整流次级电压得到。

公开(公告)号：US4087850A

公开(公告)日：1978-05-02

申请号：US760973

申请日：1977-01-21

申请人： Akio Koizumi

发明人： Akio Koizumi

IPC分类号： G05F1/56 ,  H02M3/28 ,  H02M3/335

CPC分类号： H02M3/33507

摘要： In a power supply circuit having a circuit for supplying an input DC voltage through a switching element to a winding, a circuit for producing a desired DC voltage by switching the switching element with a pulse and a circuit for detecting the level of the DC output voltage, and changing the duty ratio of the pulse with the detected output so as to stabilize the DC output voltage at a constant value. There is provided a circuit which limits the maximum value of the duty ratio of the pulse.

摘要翻译： 在具有通过开关元件向绕组提供输入直流电压的电路的电源电路中，通过用脉冲切换开关元件来产生期望的直流电压的电路和用于检测直流输出电压的电平的电路 ，并用检测出的输出改变脉冲的占空比，使DC输出电压稳定在一定值。 提供限制脉冲占空比的最大值的电路。

公开(公告)号：US4236196A

公开(公告)日：1980-11-25

申请号：US968136

申请日：1978-12-11

申请人： Akio Koizumi ,  Hiroshi Nakazawa

发明人： Akio Koizumi ,  Hiroshi Nakazawa

IPC分类号： H02M3/28 ,  H02M3/325 ,  H02M3/335

CPC分类号： H02M3/33507

摘要： A switching regulator includes a switching transformer and a switching transistor connected in series between a DC voltage source through the primary winding of the switching transformer. A pulse width modulator and a control pulse signal generator are provided so as to produce a pair of ON- and OFF-pulse signals which are supplied to the control electrode of the switching transistor so as to increase the switching speed thereof.

摘要翻译： 开关调节器包括开关变压器和串联连接在通过开关变压器的初级绕组的直流电压源之间的开关晶体管。 提供脉宽调制器和控制脉冲信号发生器，以产生一对ON和OFF脉冲信号，这些信号被提供给开关晶体管的控制电极，以便提高其开关速度。

公开(公告)号：US4223378A

公开(公告)日：1980-09-16

申请号：US962654

申请日：1978-11-21

申请人： Akio Koizumi

发明人： Akio Koizumi

IPC分类号： H02M3/28 ,  H02M3/325 ,  H02M3/335

CPC分类号： H02M3/33569

摘要： A switching regulator includes a DC voltage source having a pair of DC output terminals, a switching transformer having first and second primary windings connected in series, a magnetic core and a secondary winding, a first switching transistor connected in series between the pair of DC output terminals through the first primary winding, a second switching transistor connected in series between the pair of DC output terminals through the first and second primary windings, a rectifier circuit connected across the secondary winding. A pulse width modulator is provided to produce a PWM (pulse width modulated) control signal the duty of which is proportional to the voltage of the rectifier circuit and the PWM control signal is selectively supplied to one of the first and second switching transistors in accordance with the low or high circumstance of the load. Further, a reference pulse signal having a standard pulse width is provided, which is compared with the PWM control signal so as to selectively supply the PWM control signal to one of the first and second switching transistors.

摘要翻译： 开关稳压器包括具有一对DC输出端的DC电压源，具有串联连接的第一和第二初级绕组的开关变压器，磁芯和次级绕组，串联连接在所述一对DC输出端之间的第一开关晶体管 通过第一初级绕组的端子，通过第一和第二初级绕组串联连接在一对DC输出端子之间的第二开关晶体管，跨过次级绕组连接的整流器电路。 提供脉宽调制器以产生其占空比与整流电路的电压成比例的PWM（脉宽调制）控制信号，并且PWM控制信号被选择性地提供给第一和第二开关晶体管中的一个依照 负载的低或高环境。 此外，提供具有标准脉冲宽度的参考脉冲信号，其与PWM控制信号进行比较，以便选择性地将PWM控制信号提供给第一和第二开关晶体管之一。

公开(公告)号：US4210947A

公开(公告)日：1980-07-01

申请号：US948578

申请日：1978-10-04

申请人： Akio Koizumi

发明人： Akio Koizumi

IPC分类号： H01F38/02 ,  H02H5/04 ,  H02H7/12 ,  H02M3/335 ,  H02H7/10

CPC分类号： H01F38/02 ,  H02H5/04 ,  H02H7/1213 ,  H02M3/33507

摘要： A protective circuit for a switching regulator includes a DC voltage source having a pair of terminals, a transformer having primary, secondary windings and a magnetic core, a switching transistor having first, second and third electrodes, a circuit for connecting the second and third electrodes between the pair of terminals through the primary winding, a DC output circuit connected across the secondary winding to produce a DC signal in response to the ON/OFF operation of the switching transistor, a control circuit connected to the first electrode of the switching transistor so as to ON/OFF-control the switching transistor in response to the DC signal, a detecting circuit for detecting an over-current flowing through the primary winding of the transformer and for producing a control signal in accordance with a change of the saturated magnetic flux density of the magnetic core when the temperature thereof is increased to a predetermined value, and a protective circuit for stopping the ON/OFF operation of the switching transistor in response to the control signal from the detecting circuit.

摘要翻译： 用于开关调节器的保护电路包括具有一对端子的DC电压源，具有初级，次级绕组和磁芯的变压器，具有第一，第二和第三电极的开关晶体管，用于连接第二和第三电极的电路 在一对端子之间通过初级绕组连接的直流输出电路，连接在次级绕组两端的响应于开关晶体管的导通/截止操作产生DC信号的直流输出电路，连接到开关晶体管的第一电极的控制电路 关于响应于DC信号对开关晶体管进行ON / OFF控制的检测电路，用于检测流过变压器的初级绕组的过电流并根据饱和磁通量的变化产生控制信号的检测电路 当其温度升高到预定值时磁芯的密度，以及用于停止O的保护电路 响应于来自检测电路的控制信号，开关晶体管的N / OFF操作。

公开(公告)号：US4180852A

公开(公告)日：1979-12-25

申请号：US927549

申请日：1978-07-24

申请人： Akio Koizumi ,  Hiroshi Nakazawa ,  Mitsuo Ohsawa

发明人： Akio Koizumi ,  Hiroshi Nakazawa ,  Mitsuo Ohsawa

IPC分类号： H02P1/18 ,  H02M3/28 ,  H02P13/22

CPC分类号： H02M1/36

摘要： A control circuit is disclosed for use in a switching-type regulator which includes a source of unregulated DC voltage, a switching circuit for interrupting the unregulated DC voltage to produce an AC voltage having a duty cycle which is a function of the operation of the switching circuit, a converter for converting the AC voltage to a regulated DC voltage, a controllable pulse generator for supplying pulses of controllable duration to the switching circuit so as to determine the duty cycle of the AC voltage, a feedback circuit responsive to variations in the regulated DC voltage for controlling the duration of the generated pulses to maintain the regulated DC voltage at a desired level, and disabling circuit for selectively limiting the operation of the pulse generator. The control circuit is used to reset the disabling circuit to an initial state and to change gradually the duration of the pulses which are generated by the pulse generator when the regulator first is turned ON. By resetting the disabling circuit, there is no limitation on the operation of the pulse generator at the outset. By gradually increasing the duration of the pulses generated by the pulse generator, the so-called "soft start" operation is performed, whereby the regulated DC voltage gradually is increased from a zero level to its desired level. The control circuit includes a voltage generator for generating a control voltage which increases rapidly during an initial interval and then increases at a significantly slower rate after it attains a first level. The disabling circuit is reset when the control voltage reaches its first level; and when the control voltage thereafter increases at a much slower rate, the slowly-increasing control voltage is used to correspondingly increase the duration of the generated pulses, whereby the level of the regulated DC voltage likewise increases.

摘要翻译： 公开了一种用于开关型调节器的控制电路，该开关型调节器包括未调节的直流电压源，用于中断未调节的直流电压以产生交流电压的开关电路，该交流电压的占空比是开关操作的函数 电路，用于将AC电压转换为稳定的DC电压的转换器，用于向开关电路提供可控持续时间的脉冲以便确定AC电压的占空比的可控脉冲发生器，响应于调节的 DC电压，用于控制所产生的脉冲的持续时间以将调节的DC电压维持在期望的电平;以及禁止电路，用于选择性地限制脉冲发生器的操作。 控制电路用于将禁用电路复位到初始状态，并且当调节器首次接通时，逐渐改变由脉冲发生器产生的脉冲的持续时间。 通过复位禁止电路，开始时对脉冲发生器的操作没有限制。 通过逐渐增加由脉冲发生器产生的脉冲的持续时间，执行所谓的“软启动”操作，由此调节的直流电压逐渐从零电平增加到其期望的电平。 控制电路包括电压发生器，用于产生在初始间隔期间快速增加的控制电压，然后在其达到第一电平之后以显着较慢的速率增加。 当控制电压达到第一级时，禁用电路复位; 并且当控制电压以较慢的速率增加时，缓慢增加的控制电压用于相应地增加产生的脉冲的持续时间，由此调节的DC电压的电平同样增加。

公开(公告)号：US4276587A

公开(公告)日：1981-06-30

申请号：US934261

申请日：1978-08-16

申请人： Akio Koizumi

发明人： Akio Koizumi

IPC分类号： H02H7/12 ,  H02M3/156 ,  H02M3/325 ,  H02M3/335 ,  H02M3/337 ,  H04N3/18 ,  H02M3/32

CPC分类号： H02M3/3378 ,  H02M3/156 ,  H02M3/33569

摘要： DC to DC converter having DC input and DC output, a first switching element to repetitively connect and disconnect the DC input to an inductance winding connected through the first switching element. A source of pulse width modulated signal provides a control signal based on the detected output voltage of the converter. A second detector which detects a variation in the output load. A second switching element which controls the inductance of the winding is actuated based on the second detected signal.

摘要翻译： 具有DC输入和DC输出的DC-DC转换器，第一开关元件，用于将DC输入重复地连接和断开到通过第一开关元件连接的电感绕组。 脉冲宽度调制信号源基于检测到的转换器的输出电压提供控制信号。 检测输出负载变化的第二检测器。 基于第二检测信号来驱动控制绕组的电感的第二开关元件。