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1. 发明授权

US08164276B2 LED drive device, LED drive method and lighting system 有权
标题翻译： LED驱动装置，LED驱动方式及照明系统
公开(公告)号：US08164276B2
公开(公告)日：2012-04-24
申请号：US12609729
申请日：2009-10-30
申请人： Kesanobu Kuwabara
发明人： Kesanobu Kuwabara
IPC分类号： H05B37/02
CPC分类号： H05B33/083
摘要： A drive circuit drives LED groups each of which has a plurality of LEDs connected in series. The drive circuit includes nMOSFETs which drive the LED groups, current regulating circuits which determine drain currents of the nMOSFETs, and subtracters which control the current regulating circuits to keep the sum of the current values of adjacent two nMOSFETs constant. The LEDs can be switched on/off efficiently even when there are differences between forward voltages of the LEDs.
摘要翻译：驱动电路驱动LED组，每个LED组具有串联连接的多个LED。驱动电路包括驱动LED组的nMOSFET，确定nMOSFET的漏极电流的电流调节电路，以及控制电流调节电路以使相邻两个nMOSFET的电流值之和恒定的减法器。即使在LED的正向电压之间存在差异，也可以有效地打开/关闭LED。

2. 发明授权

US07615984B2 DC-DC converter and method of controlling thereof 失效
标题翻译： DC-DC转换器及其控制方法
公开(公告)号：US07615984B2
公开(公告)日：2009-11-10
申请号：US11470325
申请日：2006-09-06
申请人： Kesanobu Kuwabara
发明人： Kesanobu Kuwabara
IPC分类号： G05F1/00 , H02M3/335
CPC分类号： H02M3/335 , H02M2001/0032 , Y02B70/16
摘要： A DC-DC converter can prevent intermittent failure of a PWM or driving signal (VM) when a load becomes light and prevent generation of unusual noise from a transformer. The converter includes a transformer (2) having a primary winding (2a) and a secondary winding (2b), a semiconductor switching element (17) connected to the primary winding (2a), and a control unit controlling turning-ON and OFF periods of the switching element (17) so that an output voltage (VO) matches a reference value (VREF). By controlling the turning ON and OFF operation of the switching element (17), a DC voltage exactly equal to the reference value (VREF) can be supplied to a load (5). The control unit includes an output voltage detecting and adjusting circuit (6) that outputs a command value (VC) adjusted for the output voltage (VO) and the reference value (VREF), a triangular wave generating unit (7), and a comparator (15) that compares the command value (VC) and the triangular wave (VT) to generate the PWM signal (VM) for driving the switching element (17) according to the result of the comparison. The triangular wave generating unit (7) varies the inclination of the triangular wave (VT) in response to increase and decrease of the command value (VC).
摘要翻译： DC-DC转换器可以防止当负载变亮时PWM或驱动信号（VM）的间歇性故障，并防止变压器产生异常噪声。转换器包括具有初级绕组（2a）和次级绕组（2b）的变压器（2），连接到初级绕组（2a）的半导体开关元件（17），以及控制单元控制导通和关断周期的开关元件（17），使得输出电压（VO）与参考值（VREF）匹配。通过控制开关元件（17）的接通和断开操作，能够将与基准值（VREF）完全相同的直流电压提供给负载（5）。控制单元包括输出电压检测和调整电路（6），其输出针对输出电压（VO）和参考值（VREF）调整的指令值（VC），三角波产生单元（7）和比较器（15），其根据比较结果比较指令值（VC）和三角波（VT）以产生用于驱动开关元件（17）的PWM信号（VM）。三角波产生单元（7）响应于指令值（VC）的增加和减小而改变三角波（VT）的倾斜度。

3. 发明授权

US07245087B2 Power conversion device 有权
标题翻译：电源转换装置
公开(公告)号：US07245087B2
公开(公告)日：2007-07-17
申请号：US11258390
申请日：2005-10-25
申请人： Yukihiro Nishikawa , Kesanobu Kuwabara
发明人： Yukihiro Nishikawa , Kesanobu Kuwabara
IPC分类号： H05B37/02
CPC分类号： H02M3/3353
摘要： A power conversion device has a series circuit of a main switching element and a sub-switching element connected to both ends of a DC power supply, an insulating transformer, and control circuits. The main switching and sub-switching elements are alternately turned on and off by the respective control circuits such that voltage generated in the secondary coil is subjected to smoothing rectification and supplied to a load. The insulating transformer includes a primary coil, and the main control circuit takes voltage of the primary coil as signal voltage to cause the main switching element to turn on and off such that DC voltage supplied to the load is constant. The sub-control circuit turns on the sub-switching element when the voltage at both ends of the sub-switching element becomes lower than a reference voltage or when the voltage of the primary coil exceeds a predetermined value. The power supply voltage of the main control circuit is taken as a voltage obtained by subjecting the voltage of the coil to smoothing rectification, and the power supply voltage of the sub-control circuit is obtained by the on operation of the main switching element.
摘要翻译：电力转换装置具有连接到直流电源，绝缘变压器和控制电路的两端的主开关元件和子开关元件的串联电路。主开关元件和副开关元件被各个控制电路交替地接通和断开，使得在次级线圈中产生的电压被进行平滑整流并提供给负载。绝缘变压器包括初级线圈，并且主控制电路将初级线圈的电压作为信号电压，以使主开关元件导通和截止，使得提供给负载的DC电压恒定。当副开关元件两端的电压变得低于参考电压时，或当初级线圈的电压超过预定值时，副控制电路接通副开关元件。将主控制电路的电源电压作为通过对线圈的电压进行平滑整流而获得的电压，并且通过主开关元件的接通操作来获得副控制电路的电源电压。

4. 发明授权

US07206209B2 Switching power supply apparatus with error amplification control 失效
标题翻译：具有误差放大控制的开关电源装置
公开(公告)号：US07206209B2
公开(公告)日：2007-04-17
申请号：US10772968
申请日：2004-02-05
申请人： Kesanobu Kuwabara
发明人： Kesanobu Kuwabara
IPC分类号： H02M3/335
CPC分类号： H02M1/4258 , H02M2001/4275 , Y02B70/126
摘要： A switching power source device can enhance the power factor by increasing the conduction angle of an input current in a wide input voltage range, while obviating the increase of size and the increase of cost thereof, and lower the switching loss by removing higher harmonic waves from the input current. The device includes at least first, second, and third series circuits constituted of a rectifying circuit, at least first and second primary windings, a plurality of diodes, a smoothing capacitor, and first and second switching elements. The device further includes an error amplifier, which outputs an error amplified signal, and a control circuit that performs a PWM control of the switching element in response to a first modulated wave that is generated based on an inverted and amplified waveform, which is the product of the error amplified signal and a full-wave rectified waveform of an AC input voltage, and performs a PWM control of the switching element in response to a second modulated wave that is generated based on the error amplified signal and the full-wave rectified waveform of the AC input voltage to alternately turn ON and OFF the both switching elements.
摘要翻译：开关电源装置可以通过在宽输入电压范围内增加输入电流的导通角来提高功率因数，同时避免尺寸的增加和成本的增加，并且通过从高频谐波中去除高次谐波来降低开关损耗输入电流。该装置至少包括由整流电路，至少第一和第二初级绕组，多个二极管，平滑电容器以及第一和第二开关元件构成的第一，第二和第三串联电路。该装置还包括误差放大器，其输出误差放大信号;以及控制电路，其响应于基于反相和放大波形产生的第一调制波来执行开关元件的PWM控制，该波形是产品的误差放大信号和交流输入电压的全波整流波形，并且响应于基于误差放大信号和全波整流波形产生的第二调制波来执行开关元件的PWM控制的交流输入电压交替地导通和关断两个开关元件。

5. 发明申请

US20060119281A1 Power conversion device 有权
标题翻译：电源转换装置
公开(公告)号：US20060119281A1
公开(公告)日：2006-06-08
申请号：US11258390
申请日：2005-10-25
申请人： Yukihiro Nishikawa , Kesanobu Kuwabara
发明人： Yukihiro Nishikawa , Kesanobu Kuwabara
IPC分类号： H05B41/24 , H05B37/02
CPC分类号： H02M3/3353
摘要： A power conversion device has a series circuit of a main switching element and a sub-switching element connected to both ends of a DC power supply, an insulating transformer, and control circuits. The main switching and sub-switching elements are alternately turned on and off by the respective control circuits such that voltage generated in the secondary coil is subjected to smoothing rectification and supplied to a load. The insulating transformer includes a primary coil, and the main control circuit takes voltage of the primary coil as signal voltage to cause the main switching element to turn on and off such that DC voltage supplied to the load is constant. The sub-control circuit turns on the sub-switching element when the voltage at both ends of the sub-switching element becomes lower than a reference voltage or when the voltage of the primary coil exceeds a predetermined value. The power supply voltage of the main control circuit is taken as a voltage obtained by subjecting the voltage of the coil to smoothing rectification, and the power supply voltage of the sub-control circuit is obtained by the on operation of the main switching element.
摘要翻译：电力转换装置具有连接到直流电源，绝缘变压器和控制电路的两端的主开关元件和子开关元件的串联电路。主开关元件和副开关元件被各个控制电路交替地接通和断开，使得在次级线圈中产生的电压被进行平滑整流并提供给负载。绝缘变压器包括初级线圈，并且主控制电路将初级线圈的电压作为信号电压，以使主开关元件导通和截止，使得提供给负载的DC电压恒定。当副开关元件两端的电压变得低于参考电压时，或当初级线圈的电压超过预定值时，副控制电路接通副开关元件。将主控制电路的电源电压作为通过对线圈的电压进行平滑整流而获得的电压，并且通过主开关元件的接通操作来获得副控制电路的电源电压。

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