Novel Two-Phase PWM Scheme using Pulse-Voltage Injection Method for Three-Phase Voltage-Fed Converters

Motegi, Shin-ichi

doi:10.1541/ieejias.138.113

Cited by 15 publications

(3 citation statements)

References 4 publications

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“…On the other hand, with two‐phase modulation, acoustic noise produced by motors and reactors is reported to increase as compared to three‐phase modulation. [ 1–3 ] This acoustic noise, even though weak, may cause discomfort, for example, in elevators, electric vehicles, and other applications near to living environments. For example, when elevators are used in residential buildings during night hours, acoustic noise produced by motors and other devices near switching frequency may shatter the calm.…”

Section: Forewordmentioning

confidence: 99%

“…[ 5–8 ] In addition, a method for reducing acoustic noise was proposed in which saw‐tooth carrier is used, and control reference is issued so that PWM pulses same as in three‐phase modulation are outputted by discontinuous PWM. [ 1 ] With another method, not pertaining to acoustic noise control, ripple components and harmonics components of line‐line voltage fundamental wave are reduced by applying three‐phase modulation in very short periods (about one carrier cycle) during discontinuous intervals of discontinuous PWM. [ 9,10 ] Literature [ 11 ] applies electromagnetic field analysis to efficiency and oscillations in three‐ and two‐phase modulation methods employed in permanent magnet motors, and reports that three‐phase modulation features low oscillation at high efficiency.…”

Section: Forewordmentioning

confidence: 99%

“…On the other hand, acoustic noise of motors and reactors is supposed to increase as compared to three‐phase modulation. [ 1–3 ]…”

Section: Proposal Of Modulation Technique To Reduce Both Motor's Acoustic Noise and Lossmentioning

confidence: 99%

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Novel modulation technique to reduce acoustic noise and switching loss

Ayano

Kitada

Iguchi

et al. 2021

Electrical Engineering Japan

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This paper proposes a novel modulation technique that reduces both motor acoustic noise and switching loss. The conventional discontinuous PWM method can reduce the switching loss to a greater extent compared to the conventional three‐phase modulation method; however, the acoustic noise of the motor increases. The proposed technique adjusts the zero‐sequence voltage given to the voltage references in such a way that the discontinuous part of the conventional discontinuous PWM method is changed smoothly. The switching loss with the proposed technique can be reduced to 58% of that with the conventional three‐phase modulation method. The experimental results show that the acoustic noise can be reduced to a greater extent with the proposed technique compared to that with the conventional discontinuous PWM method.

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Section: Forewordmentioning

confidence: 99%