An electric drive control system for high-speed precision seeding of corn

The pneumatic disc-type precision seeding electric drive control system for corn, which optimizes the motor drive circuit and adaptive control algorithm, solves the problem of speed tracking lag in traditional seeding systems under high-speed conditions. It achieves precise synchronization between the seed metering device and the seeder's operating speed, improving seeding uniformity and system reliability.

CN224287416UActive Publication Date: 2026-05-26QINGDAO AGRI UNIV +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
QINGDAO AGRI UNIV
Filing Date
2025-03-31
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional seeding drive and control systems lag behind in speed tracking at high speeds, resulting in uneven and inaccurate seeding. Existing PID control systems cannot effectively coordinate with these systems, necessitating a more efficient and precise control system.

Method used

The high-speed precision corn seed metering electric drive control system adopts a pneumatic disc type. By optimizing the motor drive circuit design and adaptive control algorithm, it achieves precise synchronization between the seed metering speed and the seeder's operating speed. It utilizes a MOSFET full-bridge drive circuit, a TC4422 driver chip, a Schottky diode clamping circuit, and a relay switch control circuit, combined with feedback from Hall sensors and quadrature encoders, to dynamically adjust PID parameters and achieve precise synchronization between the speed and the operating speed.

Benefits of technology

It significantly improves the uniformity of high-speed seeding and the reliability of the system, overcomes the adjustment lag problem of traditional PID control under nonlinear conditions, ensures stable operation of the motor under high-frequency PWM modulation, and extends the system life.

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Abstract

This utility model discloses an electric drive control system for high-speed precision seeding of maize, characterized by including a main controller, a host computer, a unit controller, a Hall sensor, a quadrature encoder, a DC brushed motor, a motor driver, a gearbox, and a seed guide tube; when the seed metering device is operating, the host computer sends the target rotation speed and seeding density parameters, counts through the Hall sensor, calculates the operating speed, and then feeds back the motor speed through the encoder. The logic adaptive PID dynamically adjusts and corrects the parameters to match the seed metering device speed with the operating speed, thereby achieving precise synchronization between the seed metering speed and the operating speed.
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