This document describes a power control design for induction cookers using the Holtek HT46R22 microcontroller, detailing hardware and software implementation.
The paper introduces the working principle of an induction cooker and proposes a power control method to achieve stable output using the Holtek HT46R22 A/D type single-chip microcomputer as the main controller. It briefly describes the process of both hardware and software design for this application.
The system utilizes the HT46R22's built-in PWM output and multi-channel A/D conversion capabilities to control power levels based on load current feedback. The design includes a dual-loop control circuit where the difference between reference voltage and actual load voltage generates a control signal to drive IGBTs, ensuring stable power delivery across various settings (1600W down to 800W). This manual is written in Chinese.
The Holtek HT46R22 A/D type single-chip microcomputer.
The design keeps the large power conversion error within 50W.
The code sets a lower boundary of 38 for the PWM calculation.