Smart control power source of variable frequency microwave oven

Abstract

The invention discloses a smart control power source of a variable frequency microwave oven. The smart control power source includes a rectification module, a resistor R1, a field effect tube Q1, an inversion circuit, a main controller, a voltage detection module, a voltage control module, a drive module and a PWM generator. According to the invention, variable frequency control of the microwave oven is realized through single-chip microprocessor technology and PWM control technology. Besides, voltage detection, temperature detection and current detection are arranged in the power source, the power source state is monitored in real time from all angles. Also, automatic control and modulation are performed through a single-chip microprocessor provided with a display, a keyboard and an I / O interface. Not only manual setting and direct display are achieved, but also information interaction with other devices is enabled. By adopting the microwave oven adopting the design provided by the invention, all-around uniform heating of food is achieved, so that the cooked food is good in taste and small in nutrition loss. According to the variable frequency technology, power consumption in a standby state is reduced through improving the efficiency of the power source.

Description

technical field [0001] The invention relates to a frequency conversion power supply, in particular to a frequency conversion microwave oven intelligent control power supply. Background technique [0002] Microwave ovens, as the name suggests, use microwaves to cook food. A microwave oven is a modern cooking stove that uses microwaves to heat food. Microwaves are electromagnetic waves. A microwave oven is composed of a power supply, a magnetron, a control circuit, and a cooking cavity. The power supply provides a high voltage of about 4000 volts to the magnetron. Under the excitation of the power supply, the magnetron continuously generates microwaves, and then couples into the cooking cavity through the waveguide system. Near the entrance of the cooking cavity, there is a rotatable stirrer, because the stirrer is a fan-shaped metal, which can reflect the microwave in all directions after rotating, so it can evenly distribute the microwave energy in the cooking cavity, thu...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing microwave ovens are controlled by common power supply, whose voltage frequency is fixed, and can only be simulated and controlled by the length of the on / off time interval. In this way, one part of the heated food will be heated repeatedly, while the other part will not be heated enough. Inhomogeneity, needs to be improved

Images