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Control method and device of switch tube and air conditioner

A control method and control device technology, applied in the direction of output power conversion device, high-efficiency power electronic conversion, electrical components, etc., can solve the problems of unobtainable and difficult to achieve global universal use

Active Publication Date: 2017-08-01
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology

In the active PFC circuit, fixed carrier frequency and voltage control parameters are generally used, but because different countries and regions use different standard grid parameters, a single carrier frequency and voltage control parameters cannot be well adapted to different grids characteristics, so the best EMI (Electro Magnetic Interference, electromagnetic interference) and EMC (Electro Magnetic Compatibility, electromagnetic compatibility) effects cannot be obtained, and it is difficult to achieve global universal use

Method used

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  • Control method and device of switch tube and air conditioner
  • Control method and device of switch tube and air conditioner
  • Control method and device of switch tube and air conditioner

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Embodiment Construction

[0061] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0062] The invention provides a control method of a switch tube, which is applied to a PFC circuit.

[0063] The power factor of a traditional single-phase power system can be defined as the ratio of the average power (active power) actually consumed by the load to the measured apparent power, where the active power is the difference between the instantaneous voltage and the instantaneous power in one line voltage cycle. The average value of the product of the current over the time integral, such as figure 1 As shown, in this circuit, the capacitor EC is usually a large capacitor, and a stable DC voltage is connected across the load by utilizing the characteristics of slow discharge of the large capacitor. If the power switch Q does not operate, the input current can flow only when the input voltage is greater ...

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Abstract

The invention discloses a control method and device of a switch tube and an air conditioner. When the control method is used, a frequency of an input power supply of a power factor correction (PFC) circuit is periodically acquired, a switch frequency of a power switch tube is set, an output duty ratio of the power switch tube is calculated according to an AC voltage value an AC current value, which are acquired, of the input power supply of the PFC circuit and an acquired DC bus voltage value, and the power switch tube is driven to be periodically switched off or switched on according to the switch frequency and the output duty ratio. By the control method, the switch-on and the switch-off of the power switch tube can be controlled according to different frequencies of the input power supply, the power factor of the PFC circuit is increased, so that the optimal electro magnetic interference (EMI) effect is achieved.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a control method and device of a switch tube and an air conditioner. Background technique [0002] At present, in inverter air conditioner products, in order to reduce the current carrier and improve the power factor, an active PFC (Power Factor Correction, power factor correction) circuit is usually used. In the active PFC circuit, fixed carrier frequency and voltage control parameters are generally used. However, since different countries and regions use different grid parameters, a single carrier frequency and voltage control parameters cannot be well adapted to different grids. Therefore, the best EMI (Electro Magnetic Interference, electromagnetic interference) and EMC (Electro Magnetic Compatibility, electromagnetic compatibility) effects cannot be obtained, and it is difficult to achieve global use. SUMMARY OF THE INVENTION [0003] The main purpose of the ...

Claims

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Application Information

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IPC IPC(8): H02M1/44H02M1/42
CPCH02M1/4258H02M1/44Y02B70/10
Inventor 梁国强
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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