igbt driving method of electromagnetic heating device and electromagnetic heating device
A technology of electromagnetic heating device and driving method, which is applied in the direction of induction heating, induction heating control, etc., can solve the problems of relatively large output power deviation, poor compatibility of pots and pans, and poor product reliability, so as to improve the duty cycle, Effects of improving damage accumulation and reducing failure rate
Active Publication Date: 2019-10-15
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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Problems solved by technology
For pots that are commonly used and whose parameters have not changed, they can usually better match the working time under the corresponding power, but for pots that are not frequently used, the material parameters of the pot have a large deviation from the material parameters of general pots, and it is difficult to pass Look up the table to get the driving scheme in the program, resulting in the cookware not being well compatible, resulting in a relatively large output power deviation and poor product reliability
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[0042] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0043] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.
[0044] figure 1 A schematic flowchart of an IGBT driving method for an electromagnetic heating device according to an embodiment of the present invention is shown.
[0045] Such as figure 1 As shown, accor...
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The invention provides a driving method, a driving system, and an electromagnetic heating apparatus, The driving method includes acquiring the sampling signal of a collector within the specified time after the electric load signal of the specified duty ratio is applied to the collector; determining whether a zero-crossing conduction signal occurs according to the sampling signal; determining the duration of the zero-crossing conduction signal when it is determined that the zero-crossing conduction signal is present; superposing at least two drive signals with different duty ratios to generate a frequency mixing driving signal after the duration and the corresponding specified duty ratio are determined, the specified duty ratio being in the duty ration range determined by the at least two duty ratios; and applying the frequency mixing driving signal to the collector to drive the IGBT to cyclically work in multiple specified operating modes including an advanced conduction operating mode, a zero-crossing conduction operating mode and lagging conduction operating mode. According to the invention, the cooking efficiency is improved and the user experience is improved.
Description
technical field [0001] The present invention relates to the technical field of household appliances, and more specifically, to an IGBT driving method of an electromagnetic heating device and an electromagnetic heating device. Background technique [0002] In the related technology, the driving scheme of the existing induction cooker IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) is solidified in the program of the controller. When working, find the driving scheme in the program by looking up the table to control the induction cooker for heating. For pots that are commonly used and whose parameters have not changed, they can usually better match the working time under the corresponding power, but for pots that are not frequently used, the material parameters of the pot have a large deviation from the material parameters of general pots, and it is difficult to pass The driving scheme in the program is obtained by looking up the table, which leads ...
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IPC IPC(8): H05B6/06
Inventor 邹宇
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD