System with driver circuit and at least one power switch and its driving method

A driver circuit, power switch technology, applied in electronic switches, output power conversion devices, electrical components, etc., can solve the problem of power semiconductor module influence limitation, etc., to achieve small oscillation tendency, small conduction loss, small switching loss. Effect

Inactive Publication Date: 2010-02-17
SEMIKRON ELECTRONICS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the influence possibilities at the level of the power semiconductor module are strongly limited, since many so-called factors are determined by the application and thus cannot be changed

Method used

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  • System with driver circuit and at least one power switch and its driving method
  • System with driver circuit and at least one power switch and its driving method

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Embodiment Construction

[0021] figure 1 The configuration of the system according to the invention with a connectable controller 10 is shown. In this case, the system has a driver circuit 20 which receives a control command 120 for the power switch from a higher-level controller 10 via a data channel 12 .

[0022] The driver circuit 20 processes this control command into a drive signal for the power switch 30 . In this case, according to the invention, the power switch 30 is formed as a parallel circuit of at least one first switchable power semiconductor component 32 and at least one second switchable power semiconductor component 34 . In this case, the first power semiconductor component 32 is characterized in that it has lower switching losses and a lower tendency to oscillate than the second power semiconductor component 34 . Correspondingly, the second power semiconductor component 34 is characterized in that it has lower conduction losses than the first power semiconductor component 32 .

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Abstract

The invention relates to a system with a driver circuit and at least one power switch and its driving method. A system with driver circuit and at least one power switch is provided, wherein, a parallel circuit of a first switched power semiconductor element and a second switched power semiconductor element is formed by the power switch. The invention is characterized in that the first power semiconductor element has smaller switch loss and / or oscillation tendency than the second power semiconductor element, while the second power semiconductor element has smaller conduction loss than at leastone first power semiconductor element. In the method, the first power semiconductor element is conducted and retained at the specific period under the switch pulse, while inn the period, the second power semiconductor element can also receive the switch pulse. By means of the method according to the invention, the total loss in the on-off process is obviously smaller than that in the structure mode of the power switch in the prior art.

Description

technical field [0001] The invention describes a system with a driver circuit and at least one power switch, which is preferably a component of a power semiconductor module. A wide variety of such power semiconductor modules are known and generally have a half-phase or three-phase topology. The power switch described here thus forms the basis of such a power semiconductor module. Furthermore, the invention describes a particularly advantageous method for operating a power switch according to the invention. Background technique [0002] A power semiconductor module of the type described is known, for example, from EP 0750345 A2. Here, the power switches consist of power transistors with power diodes connected in antiparallel. It is also known, for example from the same document, that such a power switch can be formed as a parallel circuit of more identical power transistors with a plurality of identical power diodes. [0003] A power switch consisting of a parallel circui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08
CPCH03K17/168H03K17/12H03K2217/0036
Inventor 杰尔·多·纳西门托斯特凡·施米特
Owner SEMIKRON ELECTRONICS GMBH & CO KG
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