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    • 41. 发明授权
    • 전원공급회로
    • KR100371792B1
    • 2003-02-11
    • KR1019990056915
    • 1999-12-11
    • 닛뽄덴끼 가부시끼가이샤
    • 후루하시나오키야마구치슈우지
    • H02M3/24H02M7/48H05B41/24
    • H02M1/36H02M7/537H05B41/2822H05B41/2855
    • Disclosed is a power supply circuit for boosting drive voltage by a booster circuit, inputting the boosted voltage to the primary side of a piezoelectric transformer, and driving a load with an impedance of large temperature dependency by output voltage generated at the secondary side of the piezoelectric transformer. The circuit has: an excessively-small current detection means that outputs excessively-small current signal when load current flowing through the load is smaller than a predetermined value; a stopping means that stops the operation of the booster circuit when the excessively-small current signal is output; and a delaying means that sets a delay time according to the level of the output voltage. The stopping means determines the execution or inexecution of the operation according to the existence of the excessively-small current signal when the delay time passes.
    • 本发明公开了一种电源电路,用于通过升压电路升压驱动电压,将升压后的电压输入到压电变压器的初级侧,并且通过压电的次级侧产生的输出电压驱动具有较大温度依赖性的阻抗的负载 变压器。 该电路具有:当流过负载的负载电流小于预定值时输出过小电流信号的过小电流检测装置; 停止装置,当输出过小电流信号时停止升压电路的操作; 以及延迟装置,根据输出电压的电平来设置延迟时间。 当延迟时间过去时,停止装置根据过小电流信号的存在来确定操作的执行或不执行。
    • 42. 发明授权
    • 유도가열 조리기의 부하 감지회로
    • 感应加热炊具负载感应电路
    • KR1019940004040B1
    • 1994-05-11
    • KR1019910018744
    • 1991-10-24
    • 주식회사 엘지이아이
    • 이민기
    • H05B6/12
    • H05B6/062H02M7/537H05B6/04
    • The load detection circuit drives an induction heating cooker at one milisecond after the zero-crossing of input power so that a starting circuit is ignited under the stable condition. The circuit includes a comparator (CP1) for comparing output voltage level of an input current detector to a reference voltage, a bridge diode (BD2) for rectifying input AC voltage, a zero-crossing detector (8) for detecting zero-crossing of input voltage, a delay (9) for delaying zero-crossing detection signal of the zero-crossing detector, a starter (3) for generating system start signal when output signals of the comparator and the delay (9) are all high.
    • 负载检测电路在输入功率过零之后一分钟驱动感应加热烹调器,使得起动电路在稳定状态下点火。 电路包括用于将输入电流检测器的输出电压电平与参考电压进行比较的比较器(CP1),用于整流输入AC电压的桥式二极管(BD2);用于检测输入的过零点的过零检测器(8) 电压,用于延迟过零检测器的过零检测信号的延迟(9);当比较器的输出信号和延迟(9)都为高电平时,用于产生系统启动信号的起动器(3)。
    • 44. 发明授权
    • 삼각파 비교 PWM 방식을 적용한 비엔나 정류기의 스위칭 펄스 발생 장치 및 방법
    • 使用三角波比较PWM产生维纳导通开关脉冲的装置和方法
    • KR101842705B1
    • 2018-03-28
    • KR1020170012782
    • 2017-01-26
    • 파워소프트 주식회사
    • 서광덕윤봉영지준근
    • H03K3/57H03K7/08H02M7/537H02M1/08
    • H03K3/57H02M1/08H02M7/537H03K7/08
    • 본발명에따른삼각파비교 PWM 방식을적용한비엔나정류기의스위칭펄스발생장치는, 각상의전압을펄스폭변조하기위하여주어진전압을발생시키는상 지령전압발생부; 중성점전압을발생시키는중성점전압발생부; 상기상 지령전압발생부에서발생된지령전압과상기중성점전압발생부에서발생된중성점전압을합산하여단자전압을발생시키는단자전압연산부; 상기단자전압연산부에서출력된단자전압을바탕으로정규화된단자전압을출력하는정규화수단부; 반송파를발생시키는반송파발생부; 오프셋전압을발생시키는오프셋전압발생부; 상기오프셋전압발생부에서발생된오프셋전압과상기정규화수단부에서출력된정규화된단자전압을합하여출력하는비교단자전압출력부; 상기정규화수단부에서출력된정규화된단자전압또는상기비교단자전압출력부에서출력된비교단자전압과상기반송파발생부에서발생된반송파를삼각파 PWM 방식을적용하여비교하는삼각파비교기; 및상기반송파발생부에서의결과값을바탕으로스위칭펄스를발생시키는스위칭펄스발생부; 를포함할수 있다. 본발명에의한비엔나정류기의스위칭펄스발생장치및 방법을통해삼각파비교 PWM 방식을보완하여비엔나정류기의제어기구성을보다간단하게구현할수 있고, 입력 THD(Total Harmonic Distortion)특성이개선될수 있다.
    • 应用根据本发明的三角波比较PWM方法的Viennter整流器的开关脉冲发生器包括:相位指令电压发生器,用于产生用于各相电压的脉宽调制的给定电压; 中性点电压产生单元,用于产生中性点电压; 终端电压操作单元,用于通过将由相位指令电压生成单元生成的指令电压与由中性点电压生成单元生成的中性点电压相加来生成端子电压; 标准化单元,用于输出基于从端子电压计算器输出的端子电压而标准化的端子电压; 载波发生器,用于产生载波; 偏移电压发生器,用于产生偏移电压; 比较端电压输出单元,用于输出由所述偏移电压生成单元生成的所述偏移电压和从所述标准化单元输出的标准化端电压的和; 一个三角波比较器,用于通过应用三角波PWM方法来比较归一化单元输出的归一化端电压或比较端电压输出单元输出的比较端电压与载波发生器产生的载波; 以及开关脉冲发生器,用于基于载波发生器中的结果值产生开关脉冲; 该可包含。 本发明的用于产生整流器的开关脉冲的设备和方法可以补充三角波PWM方法,以简化维也纳整流器的控制器的配置并改善输入谐波失真(THD)特性。