MULTILEVEL CONVERTER ARRANGEMENT AND USE THEREOF
First Claim
1. A multilevel converter arrangement with N≧
- 2 converter levels, each level comprising a primary converter connected to a primary winding of a transformer unit of a transformer arrangement, and a secondary converter connected to a secondary winding of the transformer unit, wherein the arrangement comprises a gate-drive for controlling a controllable power semiconductor device in a primary converter with electrical power supplied to the gate-drive by a rectifier unit,wherein a power-loop with a power-loop emitter and a power-loop receptor comprising the rectifier unit, wherein the emitter is inductively coupled to the receptor via a current transformer and a power-loop conductor that is at least partially exterior to housings of both the emitter and the receptor.
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Accused Products
Abstract
The present disclosure is concerned with the provision of the necessary power to the gate-drives controlling the semiconductor devices of a multilevel converter used in railway traction applications. A power loop with a power-loop emitter and a power-loop receptor located in different housings and connected via a power-loop conductor that is at least partially exterior to both housings is proposed. By means of a current transformer inductively coupling the conductor to the emitter or receptor, the power-loop also provides for electrical insulation between the emitter and the receptor. The fact that emitter and receptor are distant from each other offers greater flexibility in the positioning and design of the galvanic separation between the emitter and the receptor or the supplied gate-drive, respectively. In particular, the local voltages of converter levels ranging up to the supply voltage of e.g. 21 kV RMS of the multilevel converter can thus be insulated from the global earth potential of the power-loop emitter. Several power-loop receptors can be coupled to the same power-loop conductor and thus fed by the same power-loop emitter.
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Citations
7 Claims
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1. A multilevel converter arrangement with N≧
- 2 converter levels, each level comprising a primary converter connected to a primary winding of a transformer unit of a transformer arrangement, and a secondary converter connected to a secondary winding of the transformer unit, wherein the arrangement comprises a gate-drive for controlling a controllable power semiconductor device in a primary converter with electrical power supplied to the gate-drive by a rectifier unit,
wherein a power-loop with a power-loop emitter and a power-loop receptor comprising the rectifier unit, wherein the emitter is inductively coupled to the receptor via a current transformer and a power-loop conductor that is at least partially exterior to housings of both the emitter and the receptor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 2 converter levels, each level comprising a primary converter connected to a primary winding of a transformer unit of a transformer arrangement, and a secondary converter connected to a secondary winding of the transformer unit, wherein the arrangement comprises a gate-drive for controlling a controllable power semiconductor device in a primary converter with electrical power supplied to the gate-drive by a rectifier unit,
Specification