Electromagnetic heating equipment, electromagnetic heating system and pulse width adjustment method thereof

Abstract

An electromagnetic heating apparatus, an electromagnetic heating system and a pulse width adjusting method thereof are disclosed, the method comprising the steps: providing a pulse signal of a currentpulse width to a driving circuit of an electromagnetic heating system in a current pulse period so that the driving circuit drives a power switch tube of the electromagnetic heating system accordingto the pulse signal of the current pulse width; judging whether a preset interrupt of the electromagnetic heating system is triggered; If the preset interrupt is triggered, the preset interrupt is entered and the current pulse width is adjusted in the preset interrupt to provide a pulse signal of the adjusted pulse width to the driving circuit in a next pulse cycle. Thus, the interrupt processingfor pulse width adjustment according to the pulse period can adopt a smaller initial pulse width or amplitude, thereby effectively reducing noise, eliminating the need for timer interrupt processing,eliminating the need for a high-speed arithmetic chip, and effectively reducing cost.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a pulse width adjustment method of an electromagnetic heating system, an electromagnetic heating system and an electromagnetic heating device. Background technique [0002] In the related art, timer interrupt processing is usually used to control the pulse width, for example, interrupt once every 50us, and increase the pulse width in the interrupt program. However, the problem with the related technology is that in the discharge stage with a shorter time, such as 2ms, the number of discharges will only be about 40 times. In this way, in order to discharge the charge as much as possible, the initial pulse width must be increased or the increase rate may be increased, which may easily lead to The noise increases, and the 50us time is relatively short, requiring a chip capable of high-speed calculation, resulting in an increase in cost. [0003] Therefore, related tech...

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Problems solved by technology

However, the problem with the related technology is that in the discharge stage with a shorter time, such as 2ms, the number of discharges will only be about 40 times. In this way, in order to discharge the charge as much as possible, the initial pulse width must be increased or the increase rate may be increased, which may easily lead to The noise increases, and the 50us time is relatively short, requiring a chip capable of high-speed calculation, resulting in an increase in cost

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