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A current tracking control method and device

A control method and current tracking technology, which are applied in electrical program control, control/regulation systems, and output power conversion devices, etc., can solve the problem that the current control switching frequency has a large fluctuation range and the current control chopping cycle does not have dynamic adjustment adaptability. , poor stability and other problems, to achieve the effect of strong timing control ability, good current tracking stability and low cost

Active Publication Date: 2017-06-30
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The current control switching frequency has a large fluctuation range and poor stability;
[0005] 2. The current control chopping cycle does not have the adaptability of dynamic adjustment

Method used

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  • A current tracking control method and device
  • A current tracking control method and device
  • A current tracking control method and device

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Embodiment Construction

[0039] Figure 1~8 It is the best embodiment of the present invention, below in conjunction with attached Figure 1~8 The specific implementation of the current tracking control method and device of the present invention will be further described.

[0040] refer to figure 1 :

[0041] figure 1 is a block diagram of logical operation steps of the current tracking control method, and its logical operation flow is:

[0042] Step S101, the current controller U2 is powered on and initialized; its embedded logic operation program first initializes and defines the working state variables state , the duration of the S1 state t p1 , the duration of the S2 state t n1 , the duration of the S3 state t n2 , the duration of the S4 state t p2 , switching cycle set value T set , the default cycle setting T dft , the timer variable t_timer , setting value t_comp_ref , circuit current sampling variable i and circuit current reference i ref Parameters; when the control s...

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Abstract

The invention provides a current tracking control method and device, which belongs to the technical field of current controller current tracking control. A current controller U2 controls on and off of a power electronic switch SW according to a logic operation result of a logic operation program. When the current controller U2 outputs a digital level signal which is high level 1, the power electronic switch SW is on, and current rises. When the current controller U2 outputs a digital level signal which is low level 0, the power electronic switch SW is off, and the current declines. The current controller U2 comprehensively calculates on and off time of the power electronic switch SW according to a current comparison output signal of a current detection comparison device U1 and a logic operation method in the logic operation program to realize current tracking control. The current tracking control method and device have the advantages of great dynamic adjustment adaptability and robustness and simple device structure.

Description

technical field [0001] The invention belongs to the technical field of current tracking control of a current controller, and in particular relates to a current tracking control method and device. Background technique [0002] The current controller is a link often used in motor speed control and switching power supply. Its performance has an important impact on the performance of the entire system. The most commonly used internal current tracking control method is the hysteresis control method. Due to its timely dynamic response, good robustness, and simple implementation, it has been widely used. However, the hysteresis control also has the disadvantages of its large switching frequency fluctuation range and the need to use analog circuits to realize it. Aiming at these deficiencies, many improved methods have emerged in domestic related fields, some try to stabilize the fluctuation of switching frequency by adjusting the hysteresis width, and some use digital methods to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56G05B19/05H02M1/14
CPCG05B19/05G05F1/56H02M1/14
Inventor 边敦新姜殿波夏强张明魁谭培红刘萌史成东
Owner SHANDONG UNIV OF TECH