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A protection circuit, an upper bridge driver chip and an ipm module

A technology for protecting circuits and driving modules, applied in the electronic field, can solve the problems that the upper bridge drive circuit cannot be closed in time, and cannot protect the safety of the upper bridge power device in time, so as to provide reliability and avoid the effect of overcurrent state

Active Publication Date: 2021-10-22
HISENSE HOME APPLIANCES GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the cost factor, an external upper bridge overcurrent protection circuit is generally not installed in the application, which leads to the fact that when the upper bridge overcurrent occurs, the upper bridge drive circuit cannot be turned off in time, so that the safety of the upper bridge power device cannot be protected in time

Method used

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  • A protection circuit, an upper bridge driver chip and an ipm module
  • A protection circuit, an upper bridge driver chip and an ipm module
  • A protection circuit, an upper bridge driver chip and an ipm module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Based on the principles of the above invention, an embodiment of the present invention provides a protection circuit, which is applied to control the upper bridge drive circuit. Such as image 3 As shown, it is a schematic diagram of the circuit structure principle of a high-bridge driving circuit and a protection circuit provided by the present invention, wherein the high-bridge driving circuit 201 includes a power switching device 2011 and a driving module 2012 . The first end of the power switch device 2011 is connected to the power supply, the second end is connected to the second end of the power switch device 2011 in the upper bridge, and the third end of the power switch device 2011 is connected to the driving module 2012 . The driving module 2012 is used for controlling the on / off between the first terminal and the second terminal of the power switching device 2011 . Specifically, the structure of the power switching device 2011 can refer to figure 2 The stru...

Embodiment 2

[0050] The embodiment of the present invention also provides an upper bridge driver chip, such as Figure 6 As shown, the upper bridge driver chip 30 includes a driver module 301, wherein the upper bridge driver circuit 30 also includes the protection circuit 202 provided in the first embodiment above.

[0051] For the description of the driving module 301, reference may be made to the corresponding description of the driving module 2012 in the first embodiment above, which will not be repeated here.

Embodiment 3

[0053] The embodiment of the present invention also provides a driver chip including an upper bridge driver function, such as Figure 7 As shown, the driving chip 40 including the driving function of the upper bridge includes a driving module 401 , and the driving chip 40 including the driving function of the upper bridge further includes the protection circuit 202 provided in the first embodiment above.

[0054] Specifically, the driving chip 40 including the driving function of the upper bridge may be a driving circuit chip such as an upper and lower bridge circuit, an H bridge circuit, and the like.

[0055] In addition, for the description of the driving module 401, reference may be made to the corresponding description of the driving module 2012 in the first embodiment above, and details are not repeated here.

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PUM

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Abstract

The invention provides a protection circuit, an upper bridge drive chip and an IPM module, and relates to the field of electronic technology. The embodiment of the present invention can detect the overcurrent in the upper bridge driving circuit in time, and turn off the upper bridge driving circuit through the control circuit in time after the overcurrent is detected, so as to avoid the continuous occurrence of the overcurrent state of the upper bridge power switching device, thereby protecting the upper bridge Power devices improve the reliability of the upper bridge drive circuit. The first end of the protection circuit is connected to the first end of the power switching device, the second end of the protection circuit is connected to the second end of the power switching device, and the third end of the protection circuit is connected to the first end of the drive module; the protection circuit is used for When the voltage between the first terminal of the protection circuit and the second terminal of the protection circuit is greater than the threshold voltage, the third terminal of the protection circuit outputs a first-level signal, so that the drive module controls the power of the upper bridge after receiving the first-level signal The switching device is off. The invention is applied to control the drive of the upper bridge power switching device and its protection circuit.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a protection circuit, an upper bridge drive chip and an IPM module. Background technique [0002] At present, brushless DC motors are being used in more and more electrical equipment. As a very important part of the DC brushless motor, the drive circuit has a great influence on the operation performance of the DC brushless motor. Such as figure 1 Shown is a schematic diagram of a circuit principle of an IPM module circuit in the prior art. The IPM module circuit includes 6 power switching devices IGBT (insulated gate bipolar transistor) (IGBT1-IGBT6 in the figure), 6 FRD (Fast recovery diode, fast recovery diode) (Di1-Di6 in the figure) and the above Bridge control chip (HVIC in the figure), lower bridge control chip (LVIC in the figure). Among them, HVIC and LVIC are used for slave U P , V P , W P , U N , V N , W N The 6 ports receive 6 control signals, and pass th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/20H02H3/08
CPCH02H3/08H02H7/20
Inventor 王斌
Owner HISENSE HOME APPLIANCES GRP CO LTD
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