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Power-consumption control circuit, intelligent power module and variable-frequency household appliance

A technology of intelligent power module and power consumption control, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and controlling/regulating systems, etc. It solves the problems of low switching loss of the switching element, and achieves the effect of reducing the occupied area, small driving capacity and ensuring safety.

Active Publication Date: 2014-07-30
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] For the state of low-frequency operation of the compressor, it is often desired to obtain low power consumption. When using IGBT tubes as on-off components, due to the tailing effect of IGBT tubes, the switching loss of the on-off components cannot be very low, so that the smart power The loss of the module 100 cannot be made very low
[0029] If the IGBT tube is replaced by a non-smearing MOS tube, the on-off loss and system power consumption can indeed be reduced when the compressor is working at low frequency, but due to the limitation of the current capacity of the MOS tube, when the compressor enters A large current will exceed the current range that the MOS tube can withstand, causing the MOS tube to burn out due to overcurrent, and even cause a fire in severe cases
[0030] In the related technology, the low-frequency operating loss of the intelligent power module is reduced by improving the tailing effect of the IGBT tube, but this special process makes the production cost of the IGBT tube very high, which is not suitable for popularization in civilian fields such as inverter air conditioners.
[0031] Therefore, how to reduce the loss of the intelligent power module when it works at low frequency, and avoid the risk of overcurrent when it works at high frequency, and how to make the production cost suitable for the civilian field has become a technical problem that needs to be solved urgently.

Method used

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  • Power-consumption control circuit, intelligent power module and variable-frequency household appliance
  • Power-consumption control circuit, intelligent power module and variable-frequency household appliance
  • Power-consumption control circuit, intelligent power module and variable-frequency household appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Embodiment 1: The switching control module 306 only makes any one of the IGBT tubes in the working state when receiving the first signal.

[0115] (1) Module composition

[0116] According to an embodiment of the present invention, preferably, as Figure 3A The switching control module 306 shown may include: a switch circuit, connected to the frequency detection module and the signal source, for conducting when the first signal is received, so as to ground the signal source, and When the second signal is received, it is disconnected, so that the signal source is output to the state control circuit; for the state control circuit, the control terminal of the on-off control circuit is connected between the signal source and the switch Between the circuits, it is used to control any of the IGBT tubes to be in the working state when the switching circuit is turned on, and to control the low-power switching element to be in the working state when the switching circuit is tur...

Embodiment approach 1

[0125] Figure 6A yes Figure 5 A schematic structural view of a specific implementation of the illustrated embodiment.

[0126] Such as Figure 6A As shown, according to a preferred embodiment of the present invention, the state control circuit 3064 includes: an analog switch, and the analog switch includes: a control element connected to the signal source (such as the above-mentioned current signal source) and the Between the switch circuits 3062, a first switch signal is generated when the switch circuit 3062 is turned on, and a second switch signal is generated when the switch circuit 3062 is turned off; controlled, one end of the controlled is connected To the corresponding signal input end of the switch assembly, the other end of the controlled device is connected to the first drive circuit 4409 when receiving the first switching signal, and connected to the first driving circuit 4409 when receiving the second switching signal Connected to the second drive circuit 441...

Embodiment approach 2

[0130] Figure 6B yes Figure 5 A schematic structural view of another embodiment of the illustrated embodiment.

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Abstract

The invention provides a power-consumption control circuit which includes a low-power-consumption switching element which is connected in parallel to any IGBT in an intelligent power module so as to form a switching assembly; a frequency detection module which is used for detecting the work frequency of the intelligent power module; switchover control modules which are used for enabling the any IGBT or simultaneously enabling the any IGBT tube and the low-power-consumption switching element to be in a work state under a condition that a first signal is received and only enabling the low-power-consumption switching element to be in a work state under a condition that a second signal is received. The invention also proposes the intelligent power module and a variable-frequency household appliance. Through the technical scheme, different on-off devices can be adopted at different work frequencies so that the power consumption of the intelligent power module can be reduced and a risk of breakdown of the on-off devices by overcurrent does not exist.

Description

technical field [0001] The present invention relates to the technical field of power consumption control, in particular to a power consumption control circuit, an intelligent power module and a frequency conversion household appliance. Background technique [0002] Intelligent Power Module, or IPM (Intelligent Power Module), is a power drive product that combines power electronics and integrated circuit technology. The intelligent power module integrates the power switching device and the high-voltage driving circuit, and has built-in fault detection circuits such as overvoltage, overcurrent and overheating. On the one hand, the intelligent power module receives the control signal from the MCU to drive the subsequent circuit to work, and on the other hand, it sends the system status detection signal back to the MCU. Compared with the traditional discrete solution, the intelligent power module wins more and more markets due to its advantages of high integration and high reli...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/36H02M1/088
Inventor 冯宇翔
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD