CN-121310324-B - Anti-crosstalk aluminum coil panel pulse group frequency division driving method and system for electromagnetic heating electric cooker

CN121310324BCN 121310324 BCN121310324 BCN 121310324BCN-121310324-B

Abstract

The application relates to the field of electromagnetic coil control of electric cookers, and discloses a pulse group frequency division driving method and a pulse group frequency division driving system for an anti-crosstalk aluminum coil panel of an electromagnetic heating electric cooker, wherein coil voltages and coil currents of a plurality of aluminum coil panels of the electromagnetic heating electric cooker in pulse group frequency division driving are synchronously sampled by acquiring preset coil working characteristics respectively corresponding to the plurality of aluminum coil panels of the electromagnetic heating electric cooker in pulse group frequency division driving; the method comprises the steps of determining coil working characteristics corresponding to coil voltage and coil current of each aluminum coil panel, determining a difference value between a first coil working characteristic corresponding to a first aluminum coil panel and a preset first coil working characteristic through a coil working characteristic comparison unit, and switching a first working frequency of the first aluminum coil panel to a first standby working frequency when the first distortion index is larger than or equal to the preset first distortion index. The application can avoid the distortion of the power adjusting signal of the aluminum coil panel in the heating process.

Inventors

CHEN JIANBO
LIU LIRUN
DING GUANGQIANG

Assignees

广东鸿智智能科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251215

Claims (10)

1. A method for cross-talk resistant aluminum coil panel pulse train division driving for an electromagnetic heating rice cooker, the method comprising: Acquiring the corresponding preset coil working characteristics of a plurality of aluminum coil panels of the electromagnetic heating electric cooker in pulse group frequency division driving, and synchronously sampling the coil voltage and the coil current of the plurality of aluminum coil panels of the electromagnetic heating electric cooker in the pulse group frequency division driving; determining coil working characteristics corresponding to coil voltage and coil current of each aluminum coil panel through a heating characteristic extraction unit, wherein the preset coil working characteristics and the coil working characteristics comprise total harmonic distortion rate, the frequencies of a plurality of pulses in pulse groups corresponding to each aluminum coil panel are the same in working, and the frequencies of a plurality of pulses in pulse groups corresponding to different aluminum coil panels are different in working; Determining a difference value between a first coil working characteristic corresponding to the first aluminum coil panel and a preset first coil working characteristic through a coil working characteristic comparison unit, and taking the difference value as a first distortion index corresponding to the first aluminum coil panel; and when the first distortion index is larger than or equal to a preset first distortion index, switching the first working frequency of the first aluminum coil panel to the first standby working frequency.
2. The method of claim 1, wherein switching the first operating frequency of the first aluminum coil panel to the first standby operating frequency when the first distortion indicator is greater than or equal to a preset first distortion indicator comprises: Acquiring a first standby working frequency corresponding to a preset first distortion index through the working frequency switching comparison table; And when the first distortion index is larger than or equal to a preset first distortion index, switching the first working frequency of the first aluminum coil panel to the first standby working frequency.
3. The method according to claim 2, wherein the method further comprises: performing Fourier transform on the coil voltage and the coil current corresponding to the first aluminum coil panel in a preset time period through an impedance characteristic extraction unit, and determining a first equivalent impedance change value corresponding to the first aluminum coil panel in the preset time period; When the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to a preset first distortion index, the first working frequency of the first aluminum coil panel is switched to the first standby working frequency.
4. A method according to claim 3, characterized in that the method further comprises: determining a first pulse group peak staggering time corresponding to a first distortion index through a working frequency switching comparison table; When the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to a preset first distortion index, the first pulse group peak-staggering time is increased for the first aluminum coil panel and the pulse group peak-staggering time of the adjacent aluminum coil panels of the first aluminum coil panel.
5. The method according to claim 4, wherein the method further comprises: The method comprises the steps of obtaining a working mode of an electromagnetic heating electric cooker, obtaining a pulse group peak-shifting adjustment factor corresponding to the working mode of the electromagnetic heating electric cooker, determining the product of first pulse group peak-shifting time and the pulse group peak-shifting adjustment factor as first adjustment pulse group peak-shifting time, wherein the working mode of the electromagnetic heating electric cooker comprises a rice cooking mode and a soup cooking mode; when the first distortion index is larger than or equal to a preset first distortion index, the first adjustment pulse group peak staggering time is increased for the pulse group peak staggering time of the first aluminum coil panel and the adjacent aluminum coil panel of the first aluminum coil panel.
6. The method of claim 5, wherein the method further comprises: acquiring a plurality of pulse group peak-shifting adjustment records of the electromagnetic heating electric cooker in a first working mode, and acquiring a plurality of first anti-crosstalk adjustment effect values of the electromagnetic heating electric cooker after the pulse group peak-shifting adjustment in the first working mode, wherein the first anti-crosstalk adjustment effect values comprise the reduction amplitude of a first distortion index before and after the pulse group peak-shifting adjustment; And when the first distortion index is larger than or equal to a preset first distortion index in the first working mode, increasing the peak staggering time of the pulse groups of the first aluminum coil panel and the adjacent aluminum coil panels of the first aluminum coil panel by the target first adjustment pulse group peak staggering time.
7. The method of claim 6, wherein the method further comprises: Determining a first switching time when the first aluminum coil panel is switched with the working frequency of the adjacent aluminum coil panel of the first aluminum coil panel by a switching time determining unit according to the pulse group period and the pulse group time sequence of the first aluminum coil panel and the adjacent aluminum coil panel of the first aluminum coil panel; When the first distortion index is larger than or equal to a preset first distortion index, the first working frequency of the first aluminum coil panel is switched to the first standby working frequency at the first switching moment.
8. The method of claim 7, wherein the method further comprises: When the number of aluminum coil panels needing to be switched in working frequency is larger than or equal to the number of preset aluminum coil panels, a plurality of switching moments at which the working frequencies of the first aluminum coil panel and the adjacent aluminum coil panels of the first aluminum coil panel are not interfered with each other are determined through a cooperative matching unit according to the working frequencies of the first aluminum coil panel and the adjacent aluminum coil panels of the first aluminum coil panel and pulse group time sequences, and different aluminum coil panels correspond to different switching moments; and switching the working frequencies of the aluminum coil panels to the standby working frequencies at a plurality of switching moments.
9. The method of claim 8, wherein the method further comprises: respectively switching the working frequencies of the aluminum coil panels to standby working frequencies at a plurality of switching moments, and respectively sampling to obtain distortion indexes of the aluminum coil panels; And when the first distortion index of the first aluminum coil disc is greater than or equal to the first distortion index corresponding to the first aluminum coil disc, the pulse group peak staggering time of the first aluminum coil disc and the adjacent aluminum coil discs of the first aluminum coil disc is increased again by the first adjustment pulse group peak staggering time.
10. A cross-talk resistant aluminium coil disc pulse train divided drive system for an electromagnetic heating rice cooker, comprising means for implementing the method of any one of claims 1 to 9.

Description

Anti-crosstalk aluminum coil panel pulse group frequency division driving method and system for electromagnetic heating electric cooker Technical Field The application relates to the technical field of electromagnetic coil control of electric rice cookers, in particular to a method and a system for driving crosstalk-resistant aluminum coil panel pulse groups in a frequency division manner for an electromagnetic heating electric rice cooker. Background The electromagnetic heating (IH, induction Heating) electric cooker works based on the electromagnetic induction heating principle, the electromagnetic heating electric cooker outputs high-frequency alternating current to the coil panel through the main control unit, so that the coil panel generates an alternating magnetic field, when the magnetic field passes through the magnetic conduction inner container in the electric cooker, the surface of the inner container can induce eddy current, and the eddy current is converted into heat energy in the magnetic conduction material due to the resistance effect, so that the food material in the inner container is heated. From the structural point of view, the electromagnetic heating electric cooker mainly comprises a coil panel, a main control unit, a magnetic conduction inner container, a shell and a heat insulation layer, and the components are cooperated to realize heating power regulation and temperature stability control. In the material selection of the coil panel of the electromagnetic heating electric cooker, compared with the traditional copper coil, the aluminum coil has the advantages that the raw material cost of aluminum is reduced by about 40% -50%, the density of aluminum is only 1/3 of that of copper, the whole weight of the coil panel can be reduced by more than 30%, the weight and the production and manufacturing cost of the whole electric cooker are reduced, meanwhile, the processing and forming difficulty of the aluminum coil is low, and the mass production and winding are facilitated. However, the aluminum coil has obvious defects in practical application, because the conductivity (about 61% of copper) and the magnetic coupling characteristic of aluminum are lower than those of copper, the aluminum coil panel is easy to generate high-frequency electromagnetic radiation clutter in the heating process, and the high-frequency electromagnetic radiation clutter can be transmitted to a signal line of a main control unit through space radiation or line conduction, so that power regulation signal is distorted, heating power fluctuation is further caused, the heating power fluctuation range can reach +/-12% -18%, the temperature distribution of an inner container is uneven, and the cooking taste of food materials is influenced. Disclosure of Invention The application aims to provide a crosstalk-resistant aluminum coil panel pulse group frequency division driving method and system for an electromagnetic heating electric cooker, which solve the technical problem that high-frequency electromagnetic clutter crosstalk is easy to generate in the heating process of an aluminum coil panel to cause power adjustment signal distortion, and achieve the technical effect of avoiding the power adjustment signal distortion of the aluminum coil panel in the heating process. The anti-crosstalk aluminum coil disc pulse group frequency division driving method for the electromagnetic heating electric cooker comprises the steps of obtaining preset coil working characteristics of a plurality of aluminum coil discs of the electromagnetic heating electric cooker, which correspond to pulse group frequency division driving, respectively, synchronously sampling coil voltages and coil currents of the plurality of aluminum coil discs of the electromagnetic heating electric cooker in pulse group frequency division driving, determining the coil working characteristics of the coil voltages and the coil currents of each aluminum coil disc through a heating characteristic extraction unit, wherein the preset coil working characteristics and the coil working characteristics comprise total harmonic distortion rate, frequencies of a plurality of pulses in the pulse groups corresponding to each aluminum coil disc are the same in working, frequencies of a plurality of pulses in the pulse groups corresponding to different aluminum coil discs in working are different, determining differences of first coil working characteristics corresponding to a first aluminum coil disc and the preset first coil working characteristics through a coil working characteristic comparison unit, and switching the first working frequencies of the first aluminum coil to the standby frequency when the first distortion indexes are larger than or equal to the preset first distortion indexes. In a possible implementation manner, when the first distortion index is greater than or equal to a preset first distortion index, switching the first working frequency of the first alum