IGBT Modules - Technologies, Driver and Application (Second Edition) - page 468

13 Inverter design
13.1 Introduction
When designing inverters, apart from suitable power semiconductors a number of
critical components must be considered. This includes the selection and design of the
gate drive, theDC-bus, the control logic and, additionally, to complywith national and/or
international standards. Some of these points were covered in other chapters, so that
the focus of this chapter will be additional aspects.
13.2 Functional inverter components
The block diagram of a typical three-phase inverter includes the following sub-systems,
as depicted i
Power section (subdivided into input circuit, DC-bus and output circuit)
Filter (mains input, DC-bus and inverter output)
Gate control unit
Cooling of thepower electronic components
Sensors (current, voltage and temperaturemeasurement)
Control logic (microcontroller)
Interface (man-machine interface and/or possibly toa supervising control logic)
Fig. 13.1
Block diagram of a typical inverter
If viewed from themains side, first the input circuit is found which transforms the AC of
the mains to a DC for the DC-link or DC-bus. Depending on the application or the
requirements, this input circuit could be uncontrolled i.e. a diode bridge, or it may be half
or fully controlled. For the half or fully controlled bridge it is common to use thyristors
(SCRs). If there is a requirement to regenerate the energy back into themains the input
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