Control unit, power conversion device and method for suppressing output voltage ripples
A control unit and power converter technology, which is applied in the fields of suppressing output voltage ripple, control unit, and power conversion device, can solve the problem that the power converter cannot be compatible with lightweight and high-frequency ripple suppression.
Active Publication Date: 2022-06-03
HANGZHOU EV TECH CO LTD
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Problems solved by technology
[0004] Therefore, current power converters are not compatible with lightweight and high-frequency ripple suppression
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[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0033] see figure 1 A schematic diagram of the power conversion device shown. The power conversion device includes a power converter, the power converter includes an input end din and an output end doout, the input end din receives the input voltage Vin, the switch network 110 and the LC filter unit 120 are sequentially connected in series between the input end din and the output end doout, The output terminal doout is used to connect the load R. The LC filter unit 120 includes a capacitor C and an inductor ...
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The invention provides a control unit, a power supply conversion device and a method for suppressing output voltage ripples, and relates to the field of power supplies, the control unit is provided, and the control unit is used for forming a PWM signal to control a power supply converter. The power converter comprises an input end, an output end, a switching network and an LC filtering unit, the switching network and the LC filtering unit are sequentially connected between the input end of the power converter and the output end of the power converter in series, the control unit comprises a compensation unit, and the compensation unit is used for adjusting a first signal received by the input end of the compensation unit and outputting a second signal at the output end of the compensation unit. Wherein a first feedback loop is formed between the output end of the power supply converter and the input end or the output end of the compensation unit, and the transfer function of the first feedback loop is related to a resistance value, which is equivalent to that virtual resistors are connected in parallel at the two ends of a capacitor C of the LC filtering unit, so that the resonance peak of the LC filtering unit can be inhibited, and the high-frequency ripple is further inhibited; no loss is generated, and the output efficiency of the power converter is not affected.
Description
technical field [0001] The invention relates to the field of power supply, in particular to a control unit, a power conversion device and a method for suppressing output voltage ripple. Background technique [0002] With social progress and the development of power technology, the market has put forward higher requirements for high power density, light weight and small size of power converters. For example, for on-board chargers, with the explosive growth of new energy vehicles, in order to meet the requirements of vehicle battery life, the same requirements are put forward for on-board DC / DC converters. In order to meet the above requirements, the high frequency of the power converter has become an inevitable result. [0003] In order to ensure the safety of load electrical appliances, such as the safety of low-voltage electrical appliances in new energy vehicles, the requirements for the output voltage ripple of power converters are becoming more and more stringent. The ...
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IPC IPC(8): H02M1/14H02M1/08
CPCH02M1/143H02M1/08Y02B70/10
Inventor 陶斯力刘磊怀仲康廖明荣赵庆
Owner HANGZHOU EV TECH CO LTD