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Primary side regulation method and apparatus aiming at cable IR drop

A feedback control and primary-side technology, applied in the direction of output power conversion devices, circuit devices, battery circuit devices, etc., can solve problems such as load terminal voltage drop, feedback voltage inaccuracy, load terminal voltage does not meet the specifications, etc., to achieve compensation The effect of voltage drop

Inactive Publication Date: 2018-03-13
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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AI Technical Summary

Problems solved by technology

[0003] Since the adapter or battery charger is usually connected to the battery or electrical equipment through a long output cable, the impedance of the cable will form a voltage drop (IR Drop), which will cause a corresponding decrease in the load voltage
In addition, due to the influence of transformer winding leakage inductance, the auxiliary winding voltage will generally increase with the increase of load current, which will also cause inaccurate feedback voltage
The above two points will reduce the voltage at the load terminal, which may cause the voltage at the load terminal to not meet the specifications or prolong the charging time of the battery
[0004] There is no effective solution to the problem that the voltage drop of the cable impedance in the prior art reduces the load voltage

Method used

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  • Primary side regulation method and apparatus aiming at cable IR drop
  • Primary side regulation method and apparatus aiming at cable IR drop
  • Primary side regulation method and apparatus aiming at cable IR drop

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

[0035] Based on the above purpose, the first aspect of the embodiments of the present invention proposes a first embodiment of a primary side feedback control method capable of performing cable voltage drop for different converters or different types...

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Abstract

The invention discloses a primary side regulation method and apparatus aiming at a cable IR drop. The method includes: determining a compensation coefficient of feedback control according to a cable;generating a compensation signal according to the compensation coefficient; compensating a feedback voltage by employing the compensation signal; and inputting the compensated feedback voltage to a primary side of a closed-loop control network. According to the primary side regulation method and apparatus aiming at the IR drop, primary side regulation of the cable IR drop can be performed aiming at different converters or different types of converters, the IR drop of the impedance of the cable is compensated, relative stable load voltage is maintained, and the IR drop caused by a non-cable impedance reason (such as a winding leakage inductance) is compensated.

Description

technical field [0001] The present invention relates to the field of electronic circuits, and more specifically, to a primary side feedback control method and device for cable voltage drop. Background technique [0002] Flyback converters are widely used in the design of power adapters and off-line battery chargers due to their low cost and ease of control. In the primary side feedback control (PSR, Primary Side Regulation), the secondary side load voltage is indirectly detected through the primary side auxiliary winding, and the detection signal can be obtained through a precise pulse width modulation (Pulse Width Modulation, PWM) circuit Very good regulated output. [0003] Since the adapter or battery charger is usually connected to the battery or electrical equipment through a long output cable, the impedance of the cable will form a voltage drop (IR Drop), which will cause a corresponding decrease in the load voltage. In addition, due to the influence of the leakage i...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M3/335H02J7/04
CPCH02M7/219H02J7/04H02M3/33523
Inventor 赵瑞东戴晓龙于治楼耿士华陈乃阔
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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