A constant power control circuit for a baby food maker

By utilizing the constant power control circuit of the baby food maker and employing closed-loop control with a microcontroller and operational amplifier, the problem of power fluctuations caused by load changes is solved, achieving stable motor power output, ensuring uniform food grinding, and extending the reliability and lifespan of the equipment.

CN122086189APending Publication Date: 2026-05-26GUANGDONG SHUNDE TUOHAO ELECTRONIC APPLIANCE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG SHUNDE TUOHAO ELECTRONIC APPLIANCE CO LTD
Filing Date
2026-03-02
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing constant power control circuits for baby food processors exhibit significant power fluctuations when the load changes, leading to uneven food grinding, increasing the risk of equipment overload or damage, and reducing equipment reliability and lifespan.

Method used

A constant power control circuit for an infant food processor is adopted. The microcontroller collects the load motor voltage in real time, calculates the target comparison voltage based on the preset constant power value, and forms a closed-loop control through an operational amplifier and a MOSFET to ensure stable motor power.

Benefits of technology

It effectively suppresses power fluctuations, ensures uniform food grinding, avoids equipment overload damage, and improves equipment reliability and service life.

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Abstract

This invention discloses a constant power control circuit for a baby food processor, belonging to the field of control circuit technology. It includes: a first power supply, a baby food processor load motor, a MOSFET, a second resistor, and a second power supply connected in series to form a power supply circuit; the second power supply is connected to a microcontroller; the microcontroller includes a first microcontroller pin and a second microcontroller pin; an operational amplifier includes a non-inverting input terminal, an inverting input terminal, and an output terminal; one end of a filter capacitor and its non-inverting input terminal are both connected to the first microcontroller pin through the first resistor; the inverting input terminal is connected between the MOSFET and the second resistor; the output terminal is connected to the MOSFET; the other end of the filter capacitor is connected between the second power supply and the second resistor; the second microcontroller pin is connected to the load motor; when the second microcontroller pin receives the load voltage, it aims to maintain a constant power value for the baby food processor load motor by outputting a target comparison voltage through the microcontroller.
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