High-power commercial induction cooker and power control method thereof

Abstract

The invention discloses a high-power commercial induction cooker and a power control method thereof. The method comprises the steps that temperature sampling values are screened for obtaining instantaneous temperature of the bottom of cookware; if the instantaneous temperature of the bottom of the cookware is lower than the preset operating temperature, a PWM signal duty cycle is increased to increase the output power of a heating coil disk; otherwise the PWM signal duty cycle output by a driving circuit is decreased to reduce the output power of the heating coil disk, and the temperature of the bottom of the cookware is gradually reduced to the preset operating temperature. By accurately obtaining the instantaneous temperature of the bottom of the cookware, the induction cooker can be controlled to keep warm in a corresponding temperature range, cooking needs of users can be better satisfied, the cooking efficiency and cooking effect can be improved, and the induction cooker has the advantages of being simple and convenient to use by customers, good in adaptability, and good in prospect of application and promotion.

Description

technical field [0001] The invention relates to electromagnetic heating control technology, in particular to a high-power commercial electromagnetic cooker and a power control method thereof. Background technique [0002] In the general induction cooker heating system, after the input power is rectified and filtered, it will form a series resonant circuit with the bottom line of the pot, resonant capacitor and IGBT. Generally, the temperature of the bottom of the pot is detected by a thermistor or a thermocouple. The detected temperature is compared with the set value. When the temperature reaches the set value, turn off the electromagnetic heating system to stop heating to adjust the temperature of the heating pot. When the temperature of the pot body stops at a certain value of the set temperature, the electromagnetic heating system is started again. In order to avoid too high start-stop frequency of the electromagnetic heating system, the electromagnetic start-up tempe...

AI Technical Summary

Problems solved by technology

Coupled with the delay of the sensor, for high-power induction cookers, this induction cooker temperature control method has a large deviation in the temperature range of the controlled heating pot, especially when the temperature is heated at 200-300 °C, the deviation reaches 30-50 °C, which cannot meet the user's expectations. Accurate control of temperature requirements

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