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Induction heating power supply output control system and method

An induction heating power supply and output control technology, applied in the power supply field, can solve the problem of frequent output jitter in the power supply system, and achieve the effects of ensuring fast response and operational reliability, improving stability, and smooth switching and adjustment.

Active Publication Date: 2014-05-28
SICHUAN INJET ELECTRIC CO LTD
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Problems solved by technology

Therefore, the current control method will make the output of the power system fluctuate around the limit value, such as figure 1 shown
The current control method can meet the requirements for the application environment with few restrictions and low output requirements, but it cannot meet the requirements for the application environment with many restrictions or high output requirements, such as pipeline surface heating, material surface treatment, etc. , affected by more restrictive conditions, the output jitter of the power system is more frequent in the restricted state

Method used

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  • Induction heating power supply output control system and method
  • Induction heating power supply output control system and method
  • Induction heating power supply output control system and method

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0020] refer to figure 2 , the output control system of the induction heating power supply of the present invention includes a control loop and a plurality of limiting loops, the number of limiting loops is determined by the limiting conditions, and one limiting condition corresponds to only one limiting loop, and each limiting loop and control loops operate independently In the end, the output results of each loop are judged by the internal program logic of the DSP, and the results that meet all the restrictive conditions are selected for output control. The induction heating powe...

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Abstract

The invention discloses an induction heating power supply output control method. A control loop and a limit loop are utilized to jointly control the output value of an induction heating power supply, the control loop is used for controlling the output value of the induction heating power supply to increase with the increase of a given input value of the control loop in a non-restriction state; and the limit loop is used for controlling the output value of the induction heating power supply to be stabilized within the output limit value of the limit loop in a restriction state. One limit loop is set corresponding to one restriction condition, the limit loop corresponding to the restriction condition is used for controlling the power supply output as the limit value in the restriction state, and the problem of output jitter in a mode that the control loop output value is directly controlled at present is solved, so that the output of the induction heating power supply can be smoothly adjusted within a full-load range.

Description

technical field [0001] The invention relates to the technical field of a power supply, in particular to an output control system and method of an induction heating power supply. Background technique [0002] Induction heating power supply is an important branch of switching power supply. Due to its high heating efficiency, fast speed, low consumption and environmental protection, induction heating power supply is widely used in various industries. During the use of the induction heating power supply, its output needs to be dynamically controlled according to the load requirements connected to it. The output of the induction heating power supply is controlled by a control loop. When controlling the output of the induction heating power supply according to the load demand, the currently used control method is to directly control the input or output value of the control loop to achieve the purpose of controlling the output of the power supply system. This control method first...

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Application Information

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IPC IPC(8): H05B6/06
Inventor 康智斌刘勇孙廷宇王汇灵
Owner SICHUAN INJET ELECTRIC CO LTD
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