公开(公告)号：EP3024299A1

公开(公告)日：2016-05-25

申请号：EP13889359.9

申请日：2013-09-13

申请人： Midea Group Co., Ltd. ,  GUANGDONG MIDEA KITCHEN APPLIANCES MANUFACTURING CO., LTD.

发明人： HUANG, Bin ,  CHEN, Xingchao ,  ZHENG, Nianzhong

IPC分类号： H05B6/06

CPC分类号： H05B6/06

摘要： Disclosed is a power supply control method for a high-frequency heating device, comprising: controlling, according to a control signal having a preset duty cycle, a switching device of the high-frequency heating device to work; detecting a real-time current passing through the switching device; and controlling the switching device to be turned off when the real-time current is greater than a preset current reference value, and not until a next turn-on window of the control signal arrives, controlling the switching device to be turned on. The power supply control method can control power of a high-frequency heating device, and can further reduce the maximum current value during work of the switching device, which reduces requirements on the switching device and can perform effective overcurrent protection. Further disclosed is a power supply control apparatus for a high-frequency heating device and a high-frequency heating device having the power supply control apparatus.

公开(公告)号：EP3780371A1

公开(公告)日：2021-02-17

申请号：EP18916874.3

申请日：2018-06-14

申请人： Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. ,  Midea Group Co., Ltd.

发明人： QIN, Chengyong ,  LI, Qinghai ,  ZHENG, Nianzhong ,  MASUDA, Shinichi ,  ZHANG, Yunxiang ,  AI, Junliang

IPC分类号： H02M5/458

摘要： An electronic transformer (100) and a microwave cooking appliance (200). The electronic transformer (100) comprises a rectifier module (10), a transformer (20), a switch module (30), and a control module (40). The rectifier module (10) is connected to an alternating current source (50); the transformer (20) is connected to the rectifier module (10); the switch module (30) is configured to provide an on/off signal to the transformer (20); the control module (40) is connected to the switch module (30); the control module (40) is configured to generate a control signal according to preset power and provide the control signal to the switch module (30) so as to control the switching frequency of the switch module (30).

公开(公告)号：EP4213360A3

公开(公告)日：2023-10-04

申请号：EP23159802.0

申请日：2018-06-14

申请人： Midea Group Co., Ltd. ,  Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd.

发明人： QIN, Chengyong ,  LI, Qinghai ,  ZHENG, Nianzhong ,  MASUDA, Shinichi ,  ZHANG, Yunxiang ,  AI, Junliang

IPC分类号： H02M3/335 ,  H02M7/06 ,  H02M3/28 ,  H02M1/00 ,  H01F27/32

摘要： An electronic transformer (100) and a microwave cooking appliance (200). The electronic transformer (100) comprises a rectifier module (10), a transformer (20), a switch module (30), and a control module (40). The rectifier module (10) is connected to an alternating current source (50); the transformer (20) is connected to the rectifier module (10); the switch module (30) is configured to provide an on/off signal to the transformer (20); the control module (40) is connected to the switch module (30); the control module (40) is configured to generate a control signal according to preset power and provide the control signal to the switch module (30) so as to control the switching frequency of the switch module (30).

公开(公告)号：EP4213360A2

公开(公告)日：2023-07-19

申请号：EP23159802.0

申请日：2018-06-14

申请人： Midea Group Co., Ltd. ,  Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd.

发明人： QIN, Chengyong ,  LI, Qinghai ,  ZHENG, Nianzhong ,  MASUDA, Shinichi ,  ZHANG, Yunxiang ,  AI, Junliang

IPC分类号： H02M3/335 ,  H02M7/06 ,  H02M3/28 ,  H02M1/00 ,  H01F27/32

摘要： An electronic transformer (100) and a microwave cooking appliance (200). The electronic transformer (100) comprises a rectifier module (10), a transformer (20), a switch module (30), and a control module (40). The rectifier module (10) is connected to an alternating current source (50); the transformer (20) is connected to the rectifier module (10); the switch module (30) is configured to provide an on/off signal to the transformer (20); the control module (40) is connected to the switch module (30); the control module (40) is configured to generate a control signal according to preset power and provide the control signal to the switch module (30) so as to control the switching frequency of the switch module (30).

公开(公告)号：EP3438543A1

公开(公告)日：2019-02-06

申请号：EP16896218.1

申请日：2016-06-20

申请人： Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. ,  Midea Group Co., Ltd.

发明人： ZHENG, Nianzhong ,  LI, Qinghai

IPC分类号： F24C7/02 ,  F24C7/08

摘要： A surge suppression circuit (100) and a microwave oven. The surge suppression circuit (100) comprises: a rectifying part (10), a filtering part (20) and a protecting element (30). The rectifying part (10) comprises a rectifying input side and a rectifying output side, the rectifying input side being connected to a voltage input end. The filtering part (20) is connected to the rectifying output side. The protecting element (30) is provided on the rectifying output side and is connected to the filtering part (20), the protecting element (30) is used for suppressing the overvoltage of the rectifying output side in a surge process, thereby improving the reliability of the rectifying part (10) and the whole microwave oven circuit.

公开(公告)号：EP2863508A1

公开(公告)日：2015-04-22

申请号：EP13806236.9

申请日：2013-06-06

申请人： Midea Group Co., Ltd. ,  GUANGDONG MIDEA KITCHEN APPLIANCES MANUFACTURING CO., LTD.

发明人： HUANG, Bin ,  ZHENG, Nianzhong ,  CHEN, Xingchao

IPC分类号： H02H7/10 ,  G01R19/165 ,  G01R25/00

CPC分类号： G01R19/165 ,  G01R25/00 ,  H03K17/0828 ,  H03K17/13 ,  H05B6/666

摘要： A protective circuit for a high frequency heating device and a high frequency heating device having same, the protective circuit for a high frequency heating device comprising: an input winding (1), a sampling winding (2), a phase comparison module (3), a voltage comparison module (4), and a controller (5); the input winding (1) is connected to the switching device of the high frequency heating device; the sampling winding (2) is disposed relative to the input winding (1) and is used to sample a voltage signal on the switching device; the phase comparison module (3) and the voltage comparison module (4) are respectively connected to the sampling winding (2); the phase comparison module (3) outputs a first comparison signal according to a voltage phase signal in the voltage signals; the voltage comparison module (4) outputs a second comparison signal according to the comparison between the voltage amplitude of the voltage signal and a preset reference voltage; the controller (5) controls the switching device to synchronously switch on and off according to the first comparison signal, and protects the switching device according to the second comparison signal. The protective circuit for a high frequency heating device improves the circuit reliability of the high frequency heating device, and reduces accumulated error caused by a plurality of resistors connected in series, thus saving cost.

摘要翻译： 一种高频加热装置的保护电路及具有该保护电路的高频加热装置，其特征在于，包括：输入绕组（1），取样绕组（2），相位比较模块（3） ，电压比较模块（4）和控制器（5）; 输入绕组（1）连接到高频加热装置的开关装置; 采样绕组（2）相对于输入绕组（1）布置，用于对开关装置上的电压信号进行采样; 相位比较模块（3）和电压比较模块（4）分别连接到采样绕组（2）; 相位比较模块（3）根据电压信号中的电压相位信号输出第一比较信号; 电压比较模块（4）根据电压信号的电压幅度与预设参考电压之间的比较输出第二比较信号; 控制器（5）根据第一比较信号控制开关装置同步接通和断开，并根据第二比较信号保护开关装置。 高频加热装置的保护电路提高了高频加热装置的电路可靠性，并且减少了串联连接的多个电阻器引起的累积误差，从而节约了成本。