Multi-mode power coordination control method and system for electric tractor

By applying feedforward torque compensation and dynamic boundary reconstruction to electric tractors, the dynamic following lag problem of traditional electric tractors under varying loads and geological resistance is solved, improving the continuity and stability of power control, suppressing heat and current ripple, and achieving more stable operation.

CN122219285AActive Publication Date: 2026-06-16MIANYANG ZHAOYU MACHINERY CO LTD
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Patent Information

Application Number
CN202610678436.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-18
Publication Date
2026-06-16
Estimated Expiration
2046-05-18

AI Technical Summary

Technical Problem

Traditional electric tractor power control methods suffer from dynamic lag when faced with varying loads and geological resistance interference. They lack underlying electrical boundary constraints, leading to heat accumulation and alternating current ripple exceeding limits, which affects the continuity of operation.

Method used

By extracting the absolute angle parameter of relative motion to derive the opposite compensation sequence, applying feedforward torque superposition, suppressing external agricultural implement mechanical resistance interference, synchronously comparing and analyzing linear velocity, obtaining slip deviation variables, shrinking the upper and lower limits of the basic torque inward, reconstructing the vehicle traction anti-slip boundary, determining the inverter temperature rise span in combination with the control cycle, reducing high-level carrier frequency peaks in stages, suppressing the heat accumulation trend of high-frequency switch junction temperature, deriving the allowable alternating current ripple limit, defining the extreme value parameters of the switch clock in descending order, constructing the underlying electrical safety operation constraints, and injecting the feedforward suppression duty cycle command into the safety frequency waveform.

Benefits of technology

It improves the continuity and smoothness of power coordination control of electric tractors in multiple modes, effectively suppresses heat accumulation and alternating current ripple, and ensures the stability and continuity of operation.

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Abstract

The invention relates to the technical field of process control, in particular to a multi-mode power coordination control method and system for an electric tractor, and the method comprises the following steps: calculating and negating a periodic angle remainder, superposing the periodic angle remainder with a basic torque to generate feed-forward data, and generating dynamic boundary reconstruction data in combination with a slip rate shrinkage torque limit. The method comprises the following steps: acquiring a junction temperature gradient deduction frequency, acquiring a temperature derating carrier frequency according to the junction temperature gradient deduction frequency, comparing and deducing a lowest frequency boundary to define a safe execution carrier frequency, and analyzing a duty ratio parameter to construct a driving waveform to generate a power coordination control instruction. Comparing the slip deviation shrinkage limit to reconstruct the traction anti-slip boundary of the vehicle, reducing the frequency crest by combining with the control cycle to relieve the junction temperature accumulation of the high-frequency switch, deducing the allowable ripple top limit to define the clock extreme value parameter of the switch, constructing the bottom electrical safety limit, injecting a feedforward instruction to send out drive, and improving the stability of power coordination.
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