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Driving method and device of power factor correction circuit, inverter and air conditioner

A technology of power factor correction and driving method, applied in output power conversion devices, electrical components, high-efficiency power electronic conversion, etc. Effect

Active Publication Date: 2021-04-16
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is that the existing PFC driving method has the problem of high switching loss of components

Method used

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  • Driving method and device of power factor correction circuit, inverter and air conditioner
  • Driving method and device of power factor correction circuit, inverter and air conditioner
  • Driving method and device of power factor correction circuit, inverter and air conditioner

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Embodiment Construction

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] The existing PFC control adopts the average current control. see figure 1 The control block (Block) structure diagram of the existing PFC control is shown, the control device can collect the output voltage Vdc_act, and compare the output voltage Vdc_act with the command voltage Vdc_ref, and the difference is passed through the voltage PI (proportional integral, proportional adjustment and integral After adjusting the regulator, enter the multiplication simulator. The instruction input current is obtained by calculating the output value of the voltage PI regulator and the input voltage Vin of the PFC through the multiplication simulator. After the energizing current I_act of the switching element and the above-mentioned command inp...

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Abstract

The invention provides a driving method and device of a power factor correction circuit, an inverter and an air conditioner. The method comprises the steps of acquiring an instruction input current of a power factor correction circuit; calculating a hysteresis bandwidth according to the instruction input current and the current multiplying power; and executing hysteresis control according to the hysteresis bandwidth. A CCM driving mode is adopted, hysteresis control is applied to PFC control, and variable switching frequency is realized through bandwidth control, so that the loss of a PFC peripheral circuit is reduced, and the service life is prolonged.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a driving method and device for a power factor correction circuit, an inverter and an air conditioner. Background technique [0002] PFC (Power factor correction, power factor correction circuit) is used to correct the power factor of the input power supply. It is generally composed of a boost circuit, which boosts the input voltage to more than 1.41 times and then outputs it. The types of PFC include boost circuit type Boost, alternate boost circuit type Interleave Boost, bridgeless boost circuit type BridgeLess Boost, totem pole type totem pole; drive methods include CCM (continuous conduction mode, continuous conduction mode), CRM ( Critical conduction mode, critical conduction mode), DCM (discontinuous current mode, discontinuous conduction mode) and other types. [0003] In air conditioners, various PFCs and their driving combinations are used according to ...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCY02B70/10
Inventor 向井胜久
Owner NINGBO AUX ELECTRIC