Driving device of semiconductor element
A driving device and semiconductor technology, which can be used in output power conversion devices, electrical components, measuring devices, etc., and can solve problems such as undetectable
Inactive Publication Date: 2018-08-24
FUJI ELECTRIC CO LTD
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- Description
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- Application Information
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Problems solved by technology
[0005] However, if the alarm signal is only output as described above, there is a problem that even if the abnormality of the semiconductor element is eliminated, it cannot be detected.
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[0022] Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar symbols are attached to the same or similar parts.
[0023] In addition, the embodiments shown below are examples of devices and methods for actualizing the technical idea of the present invention, and the technical idea of the present invention does not specify the material, shape, structure, arrangement, etc. of the constituent parts as the following Material, shape, structure, configuration, etc. Various modifications can be added to the technical idea of the present invention within the technical scope defined in the claims described in the claims.
[0024] Embodiments of the present invention will be described below with reference to the drawings.
[0025] figure 1 It is a block diagram showing an overall schematic configuration of a power conversion device to which the present invention is applie...
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The present invention comprises: a plurality of detection circuits (32, 33, 34) that detect information required for a operation for protecting a semiconductor element constituting a power conversiondevice; a protection-signal-generating unit (35) that generates protection signals of different pulse widths for each of the plurality of detection circuits when the plurality of detection circuits detect the information required for the protection operation; a protection-state-monitoring unit (36) that generates protection state signals while the information required for a protection operation isdetected by any of the plurality of detection circuits; and a signal output unit (40) that, when a protection signal has been inputted, changes the state from a first level to a second level, and that, when input of the protection signal has been stopped and the protection state signal is inputted, outputs an alarm signal to become an interim level between the first level and the second level.
Description
technical field [0001] The present invention relates to, for example, a drive device for a semiconductor element that drives a semiconductor element constituting a power conversion device and has a protection operation recognition function. Background technique [0002] Recently, intelligent power modules (IPMs) have received attention. This intelligent power module is a modularized electronic component that combines semiconductor elements (power transistors such as IGBTs) and their drive circuits, as well as protection circuits against abnormalities such as overcurrent of semiconductor elements, voltage drop of control power supply, and overheating. [0003] In addition, it has also been proposed that, in addition to such a plurality of protection circuits that individually detect abnormalities, a judgment circuit (output circuit) that incorporates a judgment circuit (output circuit) based on the abnormality detected by each protection circuit category to output an alarm s...
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IPC IPC(8): H02M1/00H02M1/08H02M7/48
CPCH02H7/122H02H7/222H02M1/08H02M1/32H02M7/5387H03K17/0828H03K17/18H03K19/20H03K2017/0806H02M1/327G01R19/16547G01R31/2619G01R31/42H02H1/0007H02H1/0061H02M7/53871H03K17/08128
Inventor 山村太久生
Owner FUJI ELECTRIC CO LTD