A control method for an aging power supply device

A technology of power supply device and control method, which is applied in the direction of control/regulation system, output power conversion device, electrical components, etc., and can solve problems such as output voltage, energy waste, and large current that are difficult to simulate constant current charging of a charger

Active Publication Date: 2021-03-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Use resistors or similar dummy loads to convert electrical energy into heat energy for consumption. Although this most primitive discharge method is simple and cheap, it causes a huge waste of energy. contrary to the theme of
At the same time, the heat dissipation of the resistance discharge device is difficult to deal with, the aging power consumption is large and the current is large, and the wire is empty and heats up seriously, which is easy to cause fire, electrical short circuit and other dangers
In addition, it is difficult to realize the continuous adjustment of the discharge current through resistance discharge.
[0006] (2) Adopt the constant voltage discharge method, use the common inverter on the market, and the discharge current is slightly smaller than the constant current value of the charger. Although this method can also feed back the energy of the charger to the grid, because it is a constant voltage method, it is very difficult It is difficult to simulate that the charger is in the state of constant current charging but the output voltage is slightly lower than the nominal value for a long time

Method used

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  • A control method for an aging power supply device
  • A control method for an aging power supply device
  • A control method for an aging power supply device

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Embodiment 1

[0063] Such as figure 1 , which shows a structural block diagram of a system for an aging power supply device according to an embodiment of the present invention.

[0064] When the energy flows forward, the single-phase AC grid voltage is the input side, and the AC / DC converter circuit rectifies the AC into DC, and the primary side DC bus voltage is U dc1 , U dc1 As the input voltage of the lower-level LLC resonant converter circuit, the output voltage obtained through the transformer life of the resonant converter is the secondary DC bus voltage U dc2 , U dc2 As the input voltage of the lower-level BUCK converter circuit, the final desired voltage U is obtained after being boosted by the BUCK converter circuit dc3 ;

[0065] When the DC side is connected to the power supply, the energy flows in the opposite direction. On the one hand, the DC power supply charges the BUCK output capacitor of the BUCK circuit. On the other hand, the remaining energy will be fed back to the gr...

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Abstract

The invention discloses a control method for an aging power supply device, and belongs to the field of power electronic system control. The method comprises a control method of a single-phase AC / DC converter circuit, an open-loop control method adopted by an LLC resonant converter, and a control method of a bidirectional BUCK-BOOST converter circuit. Through the control method of the single-phaseAC / DC converter circuit, the DC bus voltage is kept constant, fluctuation of the power grid frequency and distortion of the grid connection current at the non-fundamental frequency are suppressed, andharmonic pollution to the power grid is reduced. Through the adoption of the open-loop control method, the series LLC resonant converter can work in an intermittent mode, the switching loss of the circuit is reduced, and meanwhile, the requirement of boosting between a direct-current bus and the input of the BUCK-BOOST converter circuit is also met. Through the control method of the bidirectionalBUCK-BOOST converter circuit, power sharing by a host and a slave in a constant-current mode is realized, switching tube driving signals of two BUCK-BOOST converters are subjected to phase shifting by 180 degrees to realize interleaved parallel connection, ripples of the current on the output side are reduced, and the quality of the output current is improved.

Description

technical field [0001] The invention belongs to the field of power electronic system control, and relates to a control method for an aging power supply device. Background technique [0002] At present, the country is vigorously implementing energy conservation and emission reduction, promulgating national standards for electric vehicles, encouraging the development of electric vehicles, and green travel. 2015 is the beginning of the rapid development of electric vehicles, and there will be a large number of electric vehicles in the market. Very large, in order to meet the market demand, the electric vehicle charger and its energy-saving aging device are specially launched. [0003] On the one hand, it meets the needs of automobile manufacturers for the configuration of chargers, and on the other hand, it solves the aging problem of other charger manufacturers. Because the power of electric vehicle chargers is large, it consumes a lot of electric energy when it leaves the fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/68H02M3/00H02M3/158H02M3/335
CPCH02M3/00H02M3/1582H02M3/33584H02M7/68Y02B70/10
Inventor 粟梅邬思升但汉兵孙尧王辉韩华许国徐菁涛
Owner CENT SOUTH UNIV
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