Unlock instant, AI-driven research and patent intelligence for your innovation.

Power conversion device, power conversion device module, air conditioner, and freezing device

A power conversion device and power conversion technology, which are applied to output power conversion devices, electrical components, and the conversion of AC power input to DC power output, etc., can solve problems such as excessive inrush current flowing, and achieve the effect of suppressing rapid changes.

Inactive Publication Date: 2013-06-19
JOHNSON CONTROLS HITACHI AIR CONDITIONING
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the output voltage is not controlled by feedback, the diode rectification operation cannot avoid the reduction of the output DC voltage due to the temporary reduction of the power supply voltage.
If the output DC voltage drops, in addition to the influence on the load (stopping the motor, etc.), an excessive inrush current may flow when the power supply is restored.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power conversion device, power conversion device module, air conditioner, and freezing device
  • Power conversion device, power conversion device module, air conditioner, and freezing device
  • Power conversion device, power conversion device module, air conditioner, and freezing device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0037] figure 1 It is a configuration diagram of the power conversion device according to the first embodiment of the present invention.

[0038] The power conversion device 100 is a device that converts three-phase AC power supplied from an external three-phase AC power supply 1 into DC power and supplies it to a load 9, and includes a filter 2, a reactor unit 3, a converter circuit 4, and a smoothing capacitor 5. , shunt resistor 32, bus DC current detector 7, DC voltage detector 8, and control section 6, by converter circuit 4, smoothing capacitor 5, shunt resistor 32, bus DC current detector 7, DC voltage The detector 8 and the control unit 6 constitute a module 50 . In addition, the control unit 6 corresponds to a control unit, and uses a semiconductor computing element such as a microcomputer or a DSP (Digital Signal Processor).

[0039] The AC power supply 1 is a three-phase AC power supply that outputs a U-phase voltage, a V-phase voltage, and a W-phase voltage. The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A power conversion device includes: a plurality of reactors (L1, L2, L3) each having one end thereof connected to each phase of an AC power supply (1); a converter circuit (4) connected to the other ends of the plurality of the reactors to convert AC power to DC power; a smoothing capacitor (5) connected between the DC terminals on the output side of the converter circuit; a current detection circuit (7, 32) for detecting a DC bus current Ish constituting the sum of the load current and the current flowing in the smoothing capacitor; a voltage detection circuit (8) for detecting the output DC voltage of the converter circuit; and a control unit (6) for controlling the converter circuit using the current value detected by the current detection circuit and the voltage detection value detected by the voltage detection circuit. The occurrence of a change in the source voltage of the power supply is determined based on the change amount of the voltage detection value and the change amount of the current value.

Description

technical field [0001] The present invention relates to a power conversion device, a module for the power conversion device used in the power conversion device, an air conditioner, and a refrigeration device. Background technique [0002] PWM converter devices for converting AC power into DC power are widely used. Such a converter device connects the DC voltage side and the AC voltage side via semiconductor switching elements. The semiconductor switching element is controlled to be in an ON / OFF state, and when a momentary fluctuation (temporary drop or temporary rise) of the power supply voltage occurs, a sudden change in the input AC current may occur. If a sudden change in the input AC current occurs, the semiconductor switching element may be in an overcurrent state, and the output DC voltage may fluctuate rapidly. In addition, when the output DC voltage fluctuates greatly, not only the operation of the converter itself becomes unstable, but also affects the load. In p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M7/12H02M7/1626
Inventor 李东升能登原保夫岩路善尚栗田佳明
Owner JOHNSON CONTROLS HITACHI AIR CONDITIONING