High-bandwidth single-phase full-bridge inverter control method, system and inverter based on inverse model control

Through the method based on inverse model control, combined with phase-locked loop, inverse model controller, P controller and second-order low-pass filter, the problem of not being able to track AC signals in single-phase full-bridge inverter control is solved, and high-bandwidth static difference tracking and high-precision control are realized.

CN117240123BActive Publication Date: 2025-04-11SUZHOU DONGLING VIBRATION TEST INSTR
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Patent Information

Application Number
CN202310873342.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-17
Publication Date
2025-04-11
Estimated Expiration
2043-07-17

AI Technical Summary

Technical Problem

In the prior art, the single-phase full-bridge inverter cannot perform static-free tracking of the AC signal during control, and the bandwidth band of the input signal is limited.

Method used

A high-bandwidth single-phase full-bridge inverter control method based on inverse model control is adopted. By collecting the output voltage and output inductor current on the load, a single-phase phase locked loop structure is used to generate a phase-consistent phase triangle wave. The reference current command is adjusted by the inverse model controller and the P controller, and combined with a second-order low-pass filter, the total control signal is generated and the PWM pulse is modulated through the unipolar modulation method.

Benefits of technology

It realizes static difference tracking of wide-band input signals, is characterized by easy implementation and high-precision control, effectively widening the control frequency band of single-phase inverters.

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Abstract

The present invention discloses a high-bandwidth single-phase full-bridge inverter control method, system and inverter based on inverse model control, the method comprising: collecting the output voltage and output inductor current on the load; using a single-phase phase-locked loop structure to generate a phase triangle wave consistent with the output voltage phase; using the output signal of the reference current command through the inverse model controller as the first control signal; using a current loop P controller superimposed with a second-order low-pass filter as a current loop total gain controller to adjust the reference current command and the first error signal of the output current, and using a unipolar modulation method to modulate the total control signal to generate a PWM pulse for controlling the output voltage of the single-phase inverter. The present invention constructs a single-phase inverter control strategy based on the inverse model idea combined with a P controller and a unipolar pulse modulation method, thereby realizing zero-static-error tracking under a high-bandwidth inverse model control mode, and can realize zero-static-error tracking of broadband input signals, with the characteristics of easy implementation and high following accuracy.
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