A state-tracked digitally-controlled inverter power supply

A technology of inverter power supply and digital control, which is applied in the program control of sequence/logic controller, electrical program control, irreversible AC power input conversion to DC power output, etc., which can solve the problem that control accuracy depends on accuracy and reduce system Problems such as poor stability and robustness, to achieve the effect of enhanced load adaptability, guaranteed stability, and low cost

CN101557174AActive Publication Date: 2009-10-14HUAZHONG UNIV OF SCI & TECH
0 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-10-14

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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 Ur; 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.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the structure of the state tracking digital control inverter power supply provided by the present invention is:

[0021] The input terminal of the pre-filter 7 and the reference quantity u r The output end of the pre-filter 7 is connected to the positive input end of the subtractor 10 . The output terminal of the subtractor 10 is connected to the input terminal of the one-beat delay module 11 . The output terminal of the one-beat delay module 11 is connected with the control terminal of the inverter 2 and the second input terminal of the predictive observer 8 . The first input terminal of the predictive observer 8 is connected to the output terminal of the current sensor 6, the third input terminal of the predictive observer 8 is connected to the output terminal of the voltage sensor 5, and the output terminal of the predi...