Power feedforward control method and related device
A feedforward control and power supply technology, applied in the field of electronics, can solve problems such as difficulty in meeting input voltage regulation requirements, poor feedforward effect, etc., achieving the effects of less hardware cost, suppressing output disturbance, and wide application range
Active Publication Date: 2013-03-20
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology
[0003] There are still few researches on the digital feedforward control technology of power supply, and most of the existing digital feedforward solutions for power supply are difficult to meet the control requirements under various input voltage change rates.
For example, the existing digital feedforward scheme can meet the control requirements of slow input voltage changes, but the feedforward effect is poor when the input voltage changes rapidly
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Embodiment Construction
[0044] Embodiments of the present invention provide a power supply feed-forward control method and related devices, in order to meet the control requirements at various rates of change of the input voltage.
[0045] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0046] Each will be described in detail below.
[0047] The terms "first", "second", "third", "fourth", etc. (if any) in the...
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An embodiment of the invention discloses a power feedforward control method and a related device. The power feedforward control method can comprises sampling and obtaining a first output voltage sampling value at a first output voltage sampling position of a power supply, selecting a first feedforward gain coefficient to serve as an input voltage feedforward gain coefficient of the power supply if an absolute value of difference between the first output voltage sampling value and a reference output voltage value corresponding to the first output voltage sampling position is larger or equal to a first threshold, and selecting a second feedforward gain coefficient to serve as an input voltage feedforward gain coefficient if an absolute value of difference between the first output voltage sampling value and a reference output voltage value is smaller or equal to a second threshold. The scheme provided by the power feedforward control method and the related device conveniently meets the regulating and control requirements for multiple variation rates of input voltage.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply feed-forward control method and related devices. Background technique [0002] Commonly used power supplies generally output a constant voltage. When encountering input / output disturbance, in order to stabilize the output voltage of the power supply, it is necessary to suppress this part of the disturbance. Especially in the case of input surge, input voltage drop and high dynamic change rate of load, feedforward is usually used to solve the input disturbance; for load disturbance, the output impedance is usually reduced by increasing the output capacitance and increasing the dynamic system bandwidth, or It is solved by reducing the dynamic output impedance through nonlinear control. [0003] The research on digital feedforward control technology of power supply is still less, and most of the existing digital feedforward schemes of power supply are difficult ...
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IPC IPC(8): G05F1/56
Inventor 侯召政贾超
Owner HUAWEI DIGITAL POWER TECH CO LTD