Design method for H infinite controller of induction heating power supply
A technology of induction heating power supply and design method, applied in adaptive control, general control system, control/regulation system, etc., can solve problems such as low fault tolerance, deviation of control effect, loss of stability, etc., and achieve strong anti-interference ability and robustness. The effect of stickiness, simplified modeling and design difficulty
Inactive Publication Date: 2020-04-10
SHANGHAI INST OF TECH
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Problems solved by technology
There are many defects in the controller of the existing induction heating power supply rectifier: the establishment of the control model in the traditional control algorithm must be based on the accurate parameter model, if there are uncertain parameters, the control accuracy will be greatly reduced; when the heating system works in the presence of strong electromagnetic interference In such an environment, due to the poor anti-interference ability and low fault tolerance of traditional controllers, the control effect will deviate or even lose stability.
Although the effects of model predictive control and fuzzy neural network control are ideal, these advanced control algorithms imply a large number of calculus links, which are difficult to apply in actual systems
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[0069] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. The embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.
[0070] This embodiment takes a conventional induction heating system as an example, and the design flow chart is as follows figure 1 As shown, it is specifically a design method for an induction heating power H infinity controller, which includes the following steps:
[0071] Step A: Through analysis such as figure 2 In the induction heating system shown, the induction heating power supply is equivalently simplified, the inverter and the following induction coil and the actual heating load are equ...
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The invention discloses a design method for an H infinite controller of an induction heating power supply. The method comprises the steps: building an equivalent circuit of a system based on a rectification side through analyzing an induction heating system; constructing a mathematical model of the equivalent circuit under an abc three-phase coordinate system, further converting the mathematical model into a two-phase rotating coordinate system, and performing linear decoupling; constructing a PI double-closed-loop control system through the decoupled mathematical model; calculating an optimalcontrol rate according to an H-infinity control theory to improve the double closed-loop control system so as to solve prominent problems that the original system is poor in anti-jamming capability and the like; and then adjusting parameters through simulation to realize optimization of the control system. The method has the advantage of H-infinity control; problems of model parameter perturbation, strong electromagnetic interference in the actual environment and the like can be effectively solved; the control system has high robustness and adaptability and does not depend on a completely accurate mathematical model of the system.
Description
Technical field [0001] The invention relates to the field of induction heating, in particular to a design method for an infinite controller of an induction heating power supply H. Background technique [0002] Induction heating has become the preferred heating technology for many industrial, household and medical applications due to its advantages in high efficiency, precise output power control and high performance. The existing controllers of induction heating power supply rectifiers have many defects: the establishment of the control model in the traditional control algorithm must be based on accurate parameter models. If there are uncertain parameters, the control accuracy will be greatly reduced; when the heating system is working in the presence of strong electromagnetic interference In an environment where the traditional controller has poor anti-interference ability and low fault tolerance, the control effect will deviate or even lose stability. [0003] Therefore, it is o...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 曹家勇党铭章吕文壮许海波
Owner SHANGHAI INST OF TECH