Device and method for reducing electromagnetic noise and cooking utensil

A noise and electromagnetic technology, applied in a method for reducing electromagnetic noise, a cooking utensil, and a device for reducing electromagnetic noise, can solve problems such as affecting customer experience, harshness, etc., to improve user experience, reduce electromagnetic noise, Guaranteed effect of output power

Active Publication Date: 2018-07-20
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing popularity of electromagnetic technology, such as induction cooker, IH rice cooker (Induction Heater rice cooker, induction heating rice cooker), etc., in these electromagnetic electrical products, due to electromagnetic heating, it is necessary to switch IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) continuously. type transistor), at the same time, the mains, mains harmonics, and circuit interference to the mains, as well as the fluctuation of the mains itself, will emit corresponding electromagnetic noises on the electrical appliances under high-power heating. This electromagnetic noise is particularly Harsh, the main frequency ranges from 100Hz to 600Hz, the hum and squeak generated by this noise seriously affect the customer experience

Method used

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  • Device and method for reducing electromagnetic noise and cooking utensil
  • Device and method for reducing electromagnetic noise and cooking utensil
  • Device and method for reducing electromagnetic noise and cooking utensil

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Embodiment Construction

[0043] In order to be able to understand the above objectives, 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 the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

[0044] 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 different from those described here. Therefore, the scope of protection of the present invention is not limited to the specific details disclosed below. Limitations of the embodiment.

[0045] figure 1 A flowchart of a method for reducing electromagnetic noise according to an embodiment of the first aspect of the present invention is shown.

[0046] Such as figure 1 As shown, the embo...

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Abstract

The invention provides a device and method for reducing electromagnetic noise and a cooking utensil. The method for reducing electromagnetic noise includes performing time-sharing detection on voltagein each half wave after full wave rectification; if the voltage of any time period surpasses a predetermined chopping voltage, performing modulation on the voltage so as to enable the envelope area of the half wave subjected to modulation to be unchanged and the voltage of each period in the half wave smaller than or equal to the predetermined chopping voltage. By adopting the technical scheme provided by the invention, oscillation peak value voltage can be reduced through voltage modulation, so that electromagnetic noises mainly caused by peak value voltage can be reduced and user experienceis improved.

Description

Technical field [0001] The present invention relates to the field of electromagnetic processing, in particular to a device for reducing electromagnetic noise, a method for reducing electromagnetic noise, and a cooking appliance. Background technique [0002] With the increasing popularity of electromagnetic technology, such as induction cookers, IH rice cookers (Induction Heater rice cookers, induction heating rice cookers), etc., in these electromagnetic electrical products, due to electromagnetic heating, it is necessary to constantly switch IGBTs (Insulated Gate Bipolar Transistor). Type transistors). At the same time, the mains, mains harmonics, and the circuit’s interference to the mains, and the fluctuations of the mains itself, will all emit corresponding electromagnetic noises to the electrical appliances under high-power heating. This electromagnetic noise is particularly Harsh, the main frequency range is 100Hz to 600Hz. The buzzing and squeaking noise produced by this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06H02M1/44
CPCH02M1/44H05B6/062
Inventor 马志海王志锋冯江平区达理刘志才伍世润
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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