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Matrix converter-driven AC motor drives

Matrix converter-driven AC motor drives

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The matrix converter (MC) is an AC-AC power converter topology. The MC topologies are classified into two types: direct MC (DMC) and the indirect MC (IMC) [I]. The IMC topology is composed of a rectifier with six bidirectional switches (BDSs) and a conventional voltage source inverter (VSI). The large energy storage elements are eliminated from the intermediate DC-link in this topology. This chapter mainly focuses on direct torque control (DTC) for MC -driven interior permanent magnet synchronous machine (IPMSM) drive. First of all, it gives a brief overview on the fundamentals of MC followed by the implementation of BDSs for MC. Two current commutation strategies based on input voltage sign and output current direction, respectively, are presented in this chapter. Some other practical issues of MC are also discussed in this chapter, in terms of input filter design and overvoltage protection. Different modulation strategies for MC are briefly reviewed in this chapter. Among these methods, the indirect space vector modulation (SVM) is demonstrated by considering the MC as a two-stage converter, rectifier and inverter stages. The open-loop and closed-loop input power factor (IFF) compensation schemes are presented followed by the DTC schemes for MC drives.

Chapter Contents:

  • 11.1 Matrix converter
  • 11.1.1 Fundamentals of MC
  • 11.1.2 Implementation of MC
  • 11.1.2.1 BDS realization
  • 11.1.2.2 Input filter design
  • 11.1.2.3 Power circuit layout
  • 11.1.2.4 Protections
  • 11.1.3 Current commutation strategies
  • 11.1.3.1 Input voltage sign-based commutation
  • 11.1.3.2 Current direction-based commutation
  • 11.1.4 Modulation techniques
  • 11.1.4.1 Alesina–Venturini (AV) method
  • 11.1.4.2 Optimum AV method
  • 11.1.4.3 Scalar modulation methods
  • 11.1.4.4 Carrier-based modulation method [41]
  • 11.1.4.5 SVM method
  • 11.1.5 IPF compensation for MC
  • 11.1.5.1 Open-loop IPF compensation
  • 11.1.5.2 Closed-loop IPF compensation
  • 11.2 DTC for MC drive
  • 11.2.1 DTC of MC drives using three hysteresis comparators
  • 11.2.2 An improved DTC for MCs
  • 11.2.3 Experimental results
  • 11.2.4 DTFC for MC-fed PMSM drives by using ISVM
  • 11.2.4.1 A Mathematical model of IPMSM in the stator flux (x-y) reference frame
  • 11.2.4.2 Design of the torque and flux PI controllers
  • 11.2.4.3 Experimental results of DTFC MC drive
  • 11.3 IMC-driven AC drives
  • 11.3.1 Modulation scheme for IMC
  • 11.3.1.1 SVM for rectifier stage
  • 11.3.1.2 SVM for inverter stage
  • 11.3.2 Commutation issue for IMC
  • 11.3.3 Rotor flux-oriented control of induction machine (IM)-driven by IMC
  • 11.3.3.1 Principle of rotor-flux orientation [57–59]
  • 11.3.3.2 Indirect rotor flux-oriented vector control of IM
  • 11.4 Summary
  • List of symbols
  • Glossary of term
  • References

Inspec keywords: power factor; permanent magnet machines; power filters; torque control; matrix convertors; PWM invertors; PWM rectifiers; machine control; overvoltage protection; PWM power convertors; synchronous motor drives; energy storage

Other keywords: AC-AC power converter topology; direct MC; energy storage; MC drives; BDS; space vector modulation strategy; filter design; voltage source inverter; two-stage converter; DTC schemes; open-loop input power factor; indirect MC; closed-loop input power factor; current direction; direct torque control; intermediate DC-link; six bidirectional switches; current commutation strategy; matrix converter-driven AC motor drives; overvoltage protection; MC -driven interior permanent magnet synchronous machine; voltage sign

Subjects: Control of electric power systems; Other power apparatus and electric machines; Mechanical variables control; Synchronous machines; Power electronics, supply and supervisory circuits; Drives

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