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Space vector modulation (SVM) is an algorithm for the control of pulse-width modulation (PWM), invented by Gerhard Pfaff, Alois Weschta, and Albert Wick in 1982. [1] [2] It is used for the creation of alternating current (AC) waveforms; most commonly to drive 3 phase AC powered motors at varying speeds from DC using multiple class-D amplifiers.
The methods for these techniques follow those of classic inverters, but with added complexity. Space-vector modulation offers a greater number of fixed voltage vectors to be used in approximating the modulation signal, and therefore allows more effective space vector PWM strategies to be accomplished at the cost of more elaborate algorithms.
From the end of 1990s several papers have been published about DTC and its modifications such as space vector modulation, [20] which offers constant switching frequency. In light of the mid-2000s expiration of Depenbrock's key DTC patents, it may be that other companies than ABB have included features similar to DTC in their drives. [citation ...
Space vector modulation is a PWM control algorithm for multi-phase AC generation, in which the reference signal is sampled regularly; after each sample, non-zero active switching vectors adjacent to the reference vector and one or more of the zero switching vectors are selected for the appropriate fraction of the sampling period in order to ...
Fig. 4 shows the conduction states of the system, and from this we get the input space vectors shows in Fig. 5 [12] Fig 5: Conduction states of the Vienna Rectifier, for ia>0, ib,ic<0, valid in a 60 o {\displaystyle 60^{o}} sector of the period T1 sa, sb, and sc characterise the switching state of the system.
Thus, a of zero indicates that the system is balanced (and thus exists entirely in the alpha-beta coordinate space), and can be ignored for two coordinate calculations that operate under this assumption that the system is balanced. This is the elegance of the clarke transform as it reduces a three component system into a two component system ...
Space vector modulation, in power electronics, a modulating technique to give power to a load; Support vector machine, a machine learning algorithm; Stroboscopic effect visibility measure (SVM), a measure for assessing a type of temporal light artefacts
The direct-quadrature-zero (DQZ, DQ0 [1] or DQO, [2] sometimes lowercase) transformation or zero-direct-quadrature [3] (0DQ or ODQ, sometimes lowercase) transformation is a tensor that rotates the reference frame of a three-element vector or a three-by-three element matrix in an effort to simplify analysis.