公开(公告)号：EP1630943B1

公开(公告)日：2017-12-27

申请号：EP04745304.8

申请日：2004-05-25

申请人： TABUCHI ELECTRIC CO.,LTD. ,  Sharp Kabushiki Kaisha

发明人： MIYAZAKI, Shinobu ,  NAKAISHI, Masaki ,  MASUDA, Shinichi

IPC分类号： H02M1/42

CPC分类号： H02M1/4208 ,  Y02B70/126

摘要： An oscillation control signal generated by an inverter power source control circuit (12) includes a reference voltage setting signal for approximating the current waveform of the AC output form the AC power source (1) to a sinusoidal wave by making both sides of the waveform generate current according to the fluctuation of the PWM control signal, and a waveform shaping signal consisting of a peak adjustment signal of a sinusoidal waveform for approximating the waveform peak portion of the current waveform to a sinusoidal wave by subtraction. Accordingly, even if the PWM control signal fluctuates, it is possible to automatically improve the power factor of the power source circuit to a value higher than a predetermined value by approximating the current waveform of the AC output from the AC power source to the sinusoidal wave, thereby improving the efficiency of the power source.

公开(公告)号：EP1630943A1

公开(公告)日：2006-03-01

申请号：EP04745304.8

申请日：2004-05-25

申请人： TABUCHI ELECTRIC CO.,LTD. ,  SHARP KABUSHIKI KAISHA

发明人： MIYAZAKI, Shinobu, c/o TABUCHI ELECTRIC CO., LTD ,  NAKAISHI, Masaki, c/o TABUCHI ELECTRIC CO., LTD ,  MASUDA, Shinichi

IPC分类号： H02M7/48

CPC分类号： H02M1/4208 ,  Y02B70/126

摘要： An oscillation control signal generated by an inverter power source control circuit (12) includes a reference voltage setting signal for approximating the current waveform of the AC output form the AC power source (1) to a sinusoidal wave by making both sides of the waveform generate current according to the fluctuation of the PWM control signal, and a waveform shaping signal consisting of a peak adjustment signal of a sinusoidal waveform for approximating the waveform peak portion of the current waveform to a sinusoidal wave by subtraction. Accordingly, even if the PWM control signal fluctuates, it is possible to automatically improve the power factor of the power source circuit to a value higher than a predetermined value by approximating the current waveform of the AC output from the AC power source to the sinusoidal wave, thereby improving the efficiency of the power source.

公开(公告)号：EP1630942B1

公开(公告)日：2019-07-03

申请号：EP04745303.0

申请日：2004-05-25

申请人： TABUCHI ELECTRIC CO.,LTD. ,  Sharp Kabushiki Kaisha

发明人： MIYAZAKI, Shinobu, ,  NAKAISHI, Masaki, ,  MASUDA, Shinichi

IPC分类号： H02M1/32 ,  H02M7/48 ,  H02H7/122

公开(公告)号：EP1630942A1

公开(公告)日：2006-03-01

申请号：EP04745303.0

申请日：2004-05-25

申请人： TABUCHI ELECTRIC CO.,LTD. ,  SHARP KABUSHIKI KAISHA

发明人： MIYAZAKI, Shinobu, TABUCHI ELECTRIC CO., LTD. ,  NAKAISHI, Masaki, TABUCHI ELECTRIC CO., LTD. ,  MASUDA, Shinichi

IPC分类号： H02M7/48

CPC分类号： H02M1/32

摘要： At least one of a start abnormality detector (31), a temperature abnormality detector (32) and a voltage abnormality detector (33) has a latch inhibiting circuit for inhibiting retention of a detecting state when one of the abnormality detectors detects an abnormality, so that a current abnormality detector (34) can be inhibited from detecting an abnormal input current caused when the oscillation is halted by the abnormality detector. Accordingly, after the abnormality is removed, automatic resetting can be easily accomplished without causing the oscillation to halt as a result of the current abnormality detector detecting the presence of the abnormality. Also, since a power source abnormality detecting circuit (30) is designed in the form of an analog circuit, a low cost can be achieved and the monitoring level can be modified. In addition, the monitoring level associated only with the temperature abnormality occurring in an IGBT element (7) can be modified.

摘要翻译： 启动异常检测器（31），温度异常检测器（32）和电压异常检测器（33）中的至少一个具有用于当异常检测器检测到异常时禁止检测状态保持的锁存抑制电路，因此， 可以禁止电流异常检测器（34）检测由异常检测器停止振荡时引起的异常输入电流。 因此，在异常被去除之后，由于电流异常检测器检测到异常的存在，可以容易地实现自动复位而不会使振荡停止。 此外，由于以模拟电路的形式设计电源异常检测电路（30），所以可以实现低成本并且可以修改监视级别。 此外，可以修改仅与IGBT元件（7）中发生的温度异常相关联的监视电平。

公开(公告)号：EP1292172A1

公开(公告)日：2003-03-12

申请号：EP01941046.3

申请日：2001-06-14

申请人： Sharp Kabushiki Kaisha

发明人： TAKASHIGE, Yutaka ,  MASUDA, Shinichi ,  UEDA, Koji

IPC分类号： H05B6/68

CPC分类号： H05B6/66

摘要： The object of the invention is to provide a high-frequency heating apparatus which can maximize the input current for the high-frequency heating apparatus while securing a uniform margin relative to the cutoff current, thereby enabling maximized and efficient output of high-frequency waves.
This high-frequency heating apparatus includes: a power supply unit (1); an input current detector (16); a power converting unit (2) for converting the power from the power supply unit (1) into high-frequency waves; an inverter controller (10) for controlling a semiconductor device (9); a magnetron (15) for radiating electromagnetic waves; and a circuit for implementing negative feedback control, in the inverter control circuit (10), of the output from the input current detector (16). The apparatus further includes a control circuit (20) having a microcomputer for outputting signals to the inverter controller (10) so as to control the input current such that the input current characteristic of the high-frequency heating apparatus will approximate the current cutoff characteristic of the overcurrent circuit breaker with respect to the elapsed time.