Publication

Online vector modulation and control for three-phase multilevel converter

Alfred Rufer
1998
Conference Papers

Abstract

Three-phase multilevel converters were proposed to feed high-power induction drives or highspeed drives for flywheels. This paper describes a new vector modulation method together with the vector control for a three-phase multilevel converter. The proposed modulation scheme can reduce the switching losses to a minimum by using an optimized switching scheme. Furthermore, an optimal current quality is received in comparison with the number of commutations. Experimental tests have been done on a 12kW prototype.

Official source

https://infoscience.epfl.ch/entities/publication/d329ad8a-741b-421b-ab6e-027bfe3d07d6

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Alfred Rufer
1998
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d329ad8a-741b-421b-ab6e-027bfe3d07d6

About this result

Related concepts (20)

Power electronics

Power electronics is the application of electronics to the control and conversion of electric power. The first high-power electronic devices were made using mercury-arc valves. In modern systems, the conversion is performed with semiconductor switching devices such as diodes, thyristors, and power transistors such as the power MOSFET and IGBT. In contrast to electronic systems concerned with the transmission and processing of signals and data, substantial amounts of electrical energy are processed in power electronics.

Vector control (motor)

Vector control, also called field-oriented control (FOC), is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC or brushless DC electric motor are identified as two orthogonal components that can be visualized with a vector. One component defines the magnetic flux of the motor, the other the torque. The control system of the drive calculates the corresponding current component references from the flux and torque references given by the drive's speed control.

Variable-frequency drive

A variable-frequency drive (VFD, or adjustable-frequency drives, adjustable-speed drives), variable-speed drives, AC drives, micro drives, inverter drives, or drives) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity. Depending on its topology, it controls the associated voltage or current variation. VFDs are used in applications ranging from small appliances to large compressors.

Related publications (13)

Online vector modulation and control for three-phase multilevel converter

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