A state-tracked digitally-controlled inverter power supply

Abstract

The invention discloses a state-tracked digitally-controlled inverter power supply being characterized in that: an input end of a prefilter is connected with a reference amount u<r>; an output end of the prefilter is connected with a positive input end of a subtracter; an output end of the subtracter is connected with an input end of a one-stroke delay module; an output end of the one-stroke delay module is connected with a control end of a inverter and a second input end of a prediction observer; a first input end and a third input end of the prediction observer are respectively connected with output ends of a current sensor and a voltage sensor; an output end of the prediction observer is connected with an input end of a state gain matrix; an output end of the state gain matrix is connected with a negative input end of the subtracter; an output end of the inverter is connected with an input end of the voltage sensor and a load; a direct current end of the inverter is connected with a direct current power supply; a load current in the inverter is connected with an input end of the current sensor. The inverter power supply has good dynamic and static characteristics and has low waveform distortion of the output voltage. The invention is widely used in various power supply systems comprising an alternating current stabilized power source.

Description

technical field [0001] The invention relates to a power conversion circuit, in particular to a state tracking digital control inverter power supply. Background technique [0002] Digital controllers can overcome the shortcomings of analog controllers such as easy aging, low versatility, and complex structure, so digital control has attracted widespread attention. With the rapid development of microelectronic technologies such as microprocessors, the application of digital control is more common. In order to give full play to the advantages of digital control, scholars at home and abroad have proposed various digital control methods. [0003] However, the analog design of the digital controller is an indirect design, and any discretization method of the controller will have response distortion, resulting in its control performance being far inferior to that of the analog controller. In addition, repetitive control and deadbeat control, as two unique control methods of digit...

AI Technical Summary

Problems solved by technology

Deadbeat control determines the control quantity according to the reference signal and the dynamic model of the controlled object, so that the controlled quantity reaches the reference value within one sampling period, and has a fast response speed, but its control accuracy depends on the accuracy of the model parameters , less robustness, may reduce system stability or even become unstable

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