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1. 发明授权

US4860186A PWM controller having synchronous and asynchronous mode 失效
标题翻译： PWM控制器具有同步和异步模式
公开(公告)号：US4860186A
公开(公告)日：1989-08-22
申请号：US268567
申请日：1988-11-08
申请人： Katsumi Maekawa , Tatsuaki Ambo
发明人： Katsumi Maekawa , Tatsuaki Ambo
IPC分类号： H02M5/458 , H02M7/48
CPC分类号： H02M5/458
摘要： A PWM controller for a PWM inverter, in which a phase counter counts synchronous pulses having a frequency proportional to that of the inverter to a phase signal, and PWM pattern data is read out of a memory such as ROM by addressing using a pattern selection signal and the phase signal, in which a distributor distributes the PWM pattern data by upper bit of the phase signal to output PWM signals for controlling the inverter, and a modulation counter counts the synchronous pulses or asynchronous pulses selected by a mode signal to output a counted value to the memory, in which the counted value of the modulation counter is used instead of lower bit of the phase signal to selectively output the PWM signals of a synchronous or asynchronous PWM control.

2. 发明授权

US4646222A Inverter provided with an overvoltage clamping circuit 失效
标题翻译：变频器配有过压钳位电路
公开(公告)号：US4646222A
公开(公告)日：1987-02-24
申请号：US817173
申请日：1986-01-09
申请人： Chihiro Okado , Kazushi Ichimura , Tatsuaki Ambo
发明人： Chihiro Okado , Kazushi Ichimura , Tatsuaki Ambo
IPC分类号： H02M7/5387 , H02H7/122
CPC分类号： H02M7/5387 , Y02B70/1441
摘要： Three-phase outputs of a voltage source inverter are supplied to AC input terminals of a diode bridge through reactors, respectively, and its DC outputs are clamped by a voltage of a first DC power source. The AC input terminals of the diode bridge are further connected to AC input terminals of a second diode bridge through capacitors, and its DC outputs are clamped by a second DC power source.
摘要翻译：电压源逆变器的三相输出分别通过电抗器提供给二极管桥的交流输入端，其直流输出由第一直流电源的电压钳位。二极管桥的交流输入端子通过电容器进一步连接到第二二极管桥的交流输入端，其直流输出由第二直流电源钳位。

3. 发明授权

US08681512B2 Active clamp resonance control 有权
标题翻译：有源钳位共振控制
公开(公告)号：US08681512B2
公开(公告)日：2014-03-25
申请号：US11765692
申请日：2007-06-20
申请人： David Westmoreland , Tatsuaki Ambo
发明人： David Westmoreland , Tatsuaki Ambo
IPC分类号： H02M3/335 , H02M3/337 , H02M3/338
CPC分类号： H02M1/34 , H02M3/337 , H02M2001/342 , Y02B70/1433 , Y02B70/1491
摘要： According to some preferred embodiments, power converter includes a comparator circuit with feedback from current-fed PI or PID control to select one of two regeneration times of at least one active clamp: i) wherein at low loads a regeneration circuit is turned ON for substantially an entire current-transfer cycle such as to avoid output of current-fed converter continuing to rise; and ii) wherein at high loads the regeneration period is reduced to between about ¼ to ½ of a resonance-frequency cycle so that a resonance between the regeneration capacitance and the transformer's leakage inductance avoids excessive ringing currents and/or lost efficiency.
摘要翻译：根据一些优选实施例，功率转换器包括具有来自馈电PI或PID控制的反馈的比较器电路，以选择至少一个有源钳位电压的两个再生次数之一：i）其中在低负载下，再生电路接通以实质上整个电流转移周期，以避免电流馈送转换器的输出继续上升; 和ii）其中在高负载下，再生周期被减小到谐振频率周期的大约1/4到1/2之间，使得再生电容和变压器的漏电感之间的共振避免了过大的振铃电流和/或损失效率。

4. 发明申请

US20080013346A1 ACTIVE CLAMP RESONANCE CONTROL 有权
标题翻译：有源钳位谐振控制
公开(公告)号：US20080013346A1
公开(公告)日：2008-01-17
申请号：US11765692
申请日：2007-06-20
申请人： David Westmoreland , Tatsuaki Ambo
发明人： David Westmoreland , Tatsuaki Ambo
IPC分类号： H02M5/458
CPC分类号： H02M1/34 , H02M3/337 , H02M2001/342 , Y02B70/1433 , Y02B70/1491
摘要： According to some preferred embodiments, power converter includes a comparator circuit with feedback from current-fed PI or PID control to select one of two regeneration times of at least one active clamp: i) wherein at low loads a regeneration circuit is turned ON for substantially an entire current-transfer cycle such as to avoid output of current-fed converter continuing to rise; and ii) wherein at high loads the regeneration period is reduced to between about ¼ to ½ of a resonance-frequency cycle so that a resonance between the regeneration capacitance and the transformer's leakage inductance avoids excessive ringing currents and/or lost efficiency.
摘要翻译：根据一些优选实施例，功率转换器包括具有来自馈电PI或PID控制的反馈的比较器电路，以选择至少一个有源钳位电压的两个再生次数之一：i）其中在低负载下，再生电路接通以实质上整个电流转移周期，以避免电流馈送转换器的输出继续上升; 和ii）其中在高负载下，再生周期被减小到谐振频率周期的大约1/4到1/2之间，使得再生电容和变压器的漏电感之间的共振避免了过大的振铃电流和/或损失效率。

5. 发明授权

US06898093B2 Power conversion circuit with clamp and soft start 失效
标题翻译：电源转换电路具有钳位和软启动
公开(公告)号：US06898093B2
公开(公告)日：2005-05-24
申请号：US10601696
申请日：2003-06-24
申请人： Tatsuaki Ambo , Gary Dean Conner
发明人： Tatsuaki Ambo , Gary Dean Conner
IPC分类号： H02M3/28 , H02M1/00 , H02M1/36 , H02M3/335 , H02H7/122
CPC分类号： H02M1/36 , H02M3/33569
摘要： A power converter includes a current source providing an input current, a transformer having primary and secondary windings, a switch network coupling the current source and the primary winding, and a clamping circuit coupled to the switch network. An output bus is coupled to the secondary winding and provides an output voltage. A control circuit has inputs based on the output voltage and the input current, and generates switch network control signals based on those inputs. The control circuit also generates clamping circuit control signals based on the switch network control signals. The power converter may also include a start-up control circuit configured to selectively control the switch network and the clamping circuit so as to raise the output voltage to a desired level. In some embodiments, the switch network is a full bridge, and the clamping circuit includes first and second clamping switches.
摘要翻译：功率转换器包括提供输入电流的电流源，具有初级和次级绕组的变压器，耦合电流源和初级绕组的开关网络，以及耦合到开关网络的钳位电路。输出总线耦合到次级绕组并提供输出电压。控制电路具有基于输出电压和输入电流的输入，并且基于这些输入产生开关网络控制信号。控制电路还根据开关网络控制信号产生钳位电路控制信号。功率转换器还可以包括启动控制电路，其被配置为选择性地控制开关网络和钳位电路，以将输出电压升高到期望的水平。在一些实施例中，开关网络是全桥，并且钳位电路包括第一和第二钳位开关。

6. 发明授权

US5965038A Control equipment for resistance welding machine 失效
标题翻译：电阻焊机控制设备
公开(公告)号：US5965038A
公开(公告)日：1999-10-12
申请号：US925316
申请日：1997-09-08
申请人： Yoshihito Nomura , Tatsuaki Ambo , Saburou Souma , Chihiro Okado
发明人： Yoshihito Nomura , Tatsuaki Ambo , Saburou Souma , Chihiro Okado
IPC分类号： B23K11/24 , B23K11/25 , H02M7/5387
CPC分类号： B23K11/24 , B23K11/257 , H02M7/53871 , H02M2007/4803
摘要： A control equipment for a resistance welding machine for welding a material by the Joule's heat generated in the material by applying an electric power to the material, including an inverter for converting a DC voltage to an AC voltage by pulse width modulation control, a transformer having a primary winding to which the AC voltage is applied and having a secondary winding which supplies an AC current to the material, and a control unit for generating an AC current reference with a rectangular waveform of a specified frequency, comparing the AC current reference with an output current of the inverter to obtain an error, and for PWM controlling the inverter so that the error becomes zero.
摘要翻译：一种用于电阻焊接机的控制设备，用于通过向材料施加电力，通过在材料中产生的焦耳热量来焊接材料，该逆变器包括用于通过脉宽调制控制将直流电压转换为交流电压的逆变器，具有施加有交流电压并具有向所述材料提供交流电流的次级绕组的初级绕组，以及用于产生具有指定频率的矩形波形的交流电流基准的控制单元，将所述交流电流基准与逆变器的输出电流以获得误差，并且用于PWM控制逆变器，使得误差变为零。

7. 发明授权

US5844193A Control equipment for resistance welding machine 失效
标题翻译：电阻焊机控制设备
公开(公告)号：US5844193A
公开(公告)日：1998-12-01
申请号：US452338
申请日：1995-05-26
申请人： Yoshihito Nomura , Tatsuaki Ambo , Saburo Souma , Chihiro Okado
发明人： Yoshihito Nomura , Tatsuaki Ambo , Saburo Souma , Chihiro Okado
IPC分类号： B23K11/24 , B23K11/25 , H02M7/5387
CPC分类号： B23K11/24 , B23K11/257 , H02M7/53871 , H02M2007/4803
摘要： A control equipment for a resistance welding machine for welding a material by the Joule heat generated in the material by applying an electric power to the material, including an inverter for converting a DC voltage to an AC voltage by pulse width modulation control, a transformer having a primary winding to which the AC voltage is applied and having a secondary winding which supplies an AC current to the material, and a control unit for generating an AC current reference with a rectangular waveform of a specified frequency, comparing the AC current reference with an output current of the inverter to obtain an error, and for PWM controlling the inverter so that the error becomes zero.
摘要翻译：一种用于电阻焊接机的控制设备，用于通过向材料施加电力而通过材料中产生的焦耳热来焊接材料，该逆变器包括用于通过脉冲宽度调制控制将直流电压转换为交流电压的逆变器，具有施加有交流电压并具有向所述材料提供交流电流的次级绕组的初级绕组，以及用于产生具有指定频率的矩形波形的交流电流基准的控制单元，将所述交流电流基准与逆变器的输出电流以获得误差，并且用于PWM控制逆变器，使得误差变为零。

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