A New Current Source GTO Inverter with Sinusoidal Output Voltage and Current

Hombu, Mitsuyuki; Ueda, Suguru; Ueda, Atsushi; Matsuda, Yasuo

doi:10.1109/tia.1985.349523

Cited by 108 publications

(31 citation statements)

References 8 publications

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“…It is worth emphasizing that, although natural frequencies and vibration forces in a PWM-controlled induction machine are both very rich, (8) shows that the vibration mode of the most important excitation forces associated with PWM harmonics is zero, which is a pulsating mode [see Fig. 1(a)].…”

Section: Noise Spectrum Analysismentioning

confidence: 99%

“…From (8), it can be shown that noise components (2 and 3), 4, (5 and 6) in Table I are due to vibration forces produced by the interaction of the fundamental air-gap field and the firstorder field harmonics produced by current harmonics around the switching frequency and its multiples, and ,a s indicated by (50, 1136), etc. where 50 and 1136 Hz are the frequencies of the fundamental and harmonic current components.…”

Section: Investigation Of Acoustic Noise In Pwm-controlled Inductmentioning

confidence: 99%

“…A resonant converter facilitates ultrasonic frequency switching and thereby provides another potential for acoustic noise reduction [1]. Another method of reducing the noise from PWM controlled drives is to make sinusoidal output waveforms using filters which are connected to inverter output terminals [8]. However, although they are always beneficial, not all harmonics can be sufficiently eliminated since the magnetic noise is caused by the least residual harmonics, which cannot be absorbed by output filters.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic noise radiated by PWM-controllel induction machine drives

Chan

Zhu

et al. 2000

IEEE Trans. Ind. Electron.

144

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Abstract-This paper investigates the acoustic noise radiated from two nominally identical induction motors when fed from sinusoidal, and asymmetric regular sampling subharmonic and space-vector pulsewidth modulation (PWM) converters. The theory for analyzing the noise spectrum is developed further to account for the interaction between the motor and the drive. It is shown that manufacturing tolerances can result in significant differences in the noise level emitted from nominally identical motors, and that mechanical resonances can result in extremely high noise emissions. Such resonances can be induced by stator and rotor slot air-gap field harmonics due to the fundamental component of current, and by the interaction between the airgap field harmonics produced by the fundamental and the PWM harmonic currents. The significance of the effect of PWM strategy on the noise is closely related to the mechanical resonance with vibration mode order zero, while the PWM strategy will be critical only if the dominant cause of the emitted noise is the interaction of the fundamental air-gap field and PWM harmonics.

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Section: Noise Spectrum Analysismentioning

confidence: 99%

Section: Investigation Of Acoustic Noise In Pwm-controlled Inductmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic noise radiated by PWM-controllel induction machine drives

Chan

Zhu

et al. 2000

IEEE Trans. Ind. Electron.

144

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show abstract

“…(2) and (3). Denoting the average dc counter electromot ive force of load by Edc and the load r sLstance by Ra ' the output dc current is giv n by (18) The curr nt magn itude can be controlled by regulating the modul ation factor M and phase angle W. Th e effect of M on the fundamental amplitud e Al of swi t ching function SF is shown i n Fig .…”

Section: Output DC Currentmentioning

confidence: 99%

“…4(b) (refer to ondi ions (1) and (j i ». Denot ing the puls widths by a l a nd a 2 a nd th puls pos i tion by S, swi t ch i ng vector U is cal culated using angle ¢ = 6 -9 0 as follows : (2) From the a bove discussions, it is learned th a t the pulse widths a 1 and a 2 a re determined only from k 1 , i n itial a ngle 8 0 and…”

mentioning

confidence: 99%