Digital control power supply converter for kitchen range

Abstract

The invention discloses a digital control power supply converter for a kitchen range, which comprises a rectifier, a power inverter circuit and an SoC control chip, wherein the power inverter circuit consists of an IGBT and an LC parallel resonant circuit and is connected between the rectifier and the source of the IGBT; an MPU, a PPG connected with the MPU, an ADC, a communication interface and the like are integrated in the SoC chip; one output of the MPU is connected with the PPG through a first AND gate; a pulse signal output by the PPG is connected to the IGBT through a second AND gate; the MPU computes the value of a current power according to measured current and voltage signals, compares the current power with the power required by a supervisory computer from the communication interface and changes the set pulse width value of the PPG; and when a magnetism and energy conversion detection circuit outputs an allowed signal, the PPG outputs a pulse signal with a set pulse width to drive the IGBT to realize power regulation. The converter can receive man-machine operation instructions through the communication interface and dynamically change the output power thereof; therefore, with proper change of the structure of an inductive load in the resonant circuit, the converter can be widely used in high-frequency heating equipment such as a microwave oven, an induction cooker and the like.

Description

technical field [0001] The invention relates to a digitally controlled power converter for a cooking range. The power converter is based on a SoC (System on a Chip) chip and is suitable for high-frequency heating devices such as electromagnetic ovens and microwave ovens. Background technique [0002] Most of the existing power converters use analog pure hardware circuit structure, usually called "switching power supply circuit", which aims at stabilizing the output voltage, the operating frequency and output voltage are actively stable, and its output power changes with the size of the load . Induction cooker, microwave oven, etc., all need to select different powers for heating according to the type and amount of the object to be heated. Obviously, the above-mentioned power converter is not suitable for use in induction cooker and microwave oven. [0003] At present, based on the SOC chip, the output power is changed by changing the frequency and the specific structure of ...

AI Technical Summary

Problems solved by technology

[0003] At present, based on the SOC chip, the output power can be changed by changing the frequency and the specific structure of the inductive load in the resonant circuit, and the digital control power converter that can be applied to high-frequency heating equipment such as microwave ovens and induction cookers has not been disclosed in relevant documents.

Images