Power supply circuit for applying LLC to restaurant service robot, and control method

Abstract

The invention discloses a power supply circuit for applying LLC to a restaurant service robot, and a control method. According to the invention, a LLC topological power supply circuit is designed fordifferent working occasions such as standby, welcoming, dish taking, moving, carrying and the like of a service robot in a restaurant, a full-bridge double-resonant-cavity LLC topological structure isadopted, efficient conversion of electric energy in a full-power range is achieved through various switch combinations of N-channel field-effect tubes, and according to different working conditions of the service robot in the restaurant, four working modes including a standby mode, a light load mode, a medium load mode and a heavy load mode are set and correspond to different circuit structures and control methods respectively, so that under the condition that LLC narrow-frequency range work is met, high efficiency of the robot servo power supply in the full-power range is achieved, large loss and large heat productivity of a long-time work system are avoided, the service life of the power supply can be prolonged, interference of the servo power supply to other auxiliary power supplies isreduced, the system reliability is enhanced, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of switching converters, in particular to a power supply circuit and a control method using LLC for a restaurant service robot. Background technique [0002] The field of power electronics is developing rapidly, and the application of switching converters is becoming more and more extensive. People put more demands on switching converters: high power density, high efficiency and high reliability. In the robot servo system, a stable, reliable and efficient power supply is particularly important. The quality of the power supply is directly related to the robustness of the entire robot control system. In the traditional servo system, the inverter is often directly connected after the rectifier module to drive the servo motor of the robot, which can easily cause interference to the auxiliary power supply for the control circuit in the servo system. [0003] Using LLC resonant converter as the converter has man...

AI Technical Summary

Problems solved by technology

LLC resonant converter generally adopts two working modes of variable frequency control and fixed frequency control. However, when the load range is very wide, the LLC resonant converter using variable frequency control alone has a wide range of operating frequency, which makes the design of magnetic components difficult and causes light loads. load-time inefficiency

Using the traditional LLC resonant converter as the power supply circuit for the servo system of the restaurant service robot cannot give full play to its high efficiency and high gain characteristics at the same time

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