• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제5B권1호
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• pp.6-12
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• 2005

This paper presents Z-source inverters, their controls,, and their systems for motor drives. System configurations, analysis, controls, and unique features of the new Z-source motor drive systems will be summarized and given. Simulation and experimental results demonstrate advantageous features over the traditional voltage- and current-source inverter systems.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 추계학술대회 논문집
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• pp.56-57
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• 2012

본 논문에서는 단상 전류형 qZ-Source 인버터를 개선하여 전압이득이 확장된 단상 전류형 qZ-Source를 제안 한다. 기존의 인버터는 출력전압이 입력전압보다 작거나 같지만 제안한 인버터는 기존의 인버터보다 2배의 출력전압을 가진다. 120 W의 시제품을 제작하여 실험 검증하였다.

• 전기전자학회논문지
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• 제21권2호
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• pp.166-169
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• 2017

본 논문에서는 Z-소스 인버터의 최대승압 불연속 PWM 방법을 설계하였다. 일반적으로 불연속 PWM 방법은 스위칭 손실을 줄이고, 효율을 향상시키기 위하여 사용되어 왔으며 본 논문에서는 기존에 연구되었던 Z-소스 인버터의 최대승압 PWM 방법과 함께 불연속 PWM 기법을 결합하여 적용함으로써 전체 효율을 향상시킬 수 있었다. 제안된 방법은 실험을 통하여, 기존의 PWM 방법들과의 효율을 비교함으로써 효용성을 입증하였다.

• 전기학회논문지
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• 제57권12호
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• pp.2161-2166
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• 2008

This paper deals with a Z-source active power filter(Z-AFU) for mitigation voltage THD(total harmonic distortion) due to voltage harmonic propagation(amplification) in 6.6kv power distribution system. Bus voltage harmonic signal is detected by 60Hz butterworth BPF(band pass filter). As an ESS(energy storage system) of the proposed system, PEM fuel cells(Ballard NEXA, 1.2kw) is employed. Test results based on PSIM(power electronics simulation tool) validate the proposed approach.

• 전력전자학회지
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• 제16권2호
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• pp.54-58
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• 2011

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.545-548
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• 2006

This paper presents control method of a Z-source inverter and their relationships of voltage boost versus modulation index. A maximum boost control is presented to produce the maximum voltage boost(or voltage gain)under a given modulation index. The control method, relationships of voltage gain versus modulation index, and voltage stress versus voltage gain are analyzed in detail and verified by experiment.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.542-544
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• 2006

There are lots of control methods can be used in the 3-phase Z-Source inverter. In this paper several typical control methods are analyzed and compared through the simulation in the PSIM and Matlab.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2016년도 추계학술대회 논문집
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• pp.220-221
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• 2016

This paper proposes an active switched-capacitor embedded quasi-Z-source inverter (ASC-EqZSI) topology. In order to improve boost ability, One diode and one switch device are added in the qZSI impedance network, and a single dc source is shifted in series with the inductor in the impedance network. The performances of the proposed topology are verified with simulation and experimental results.

• 조명전기설비학회논문지
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• 제26권4호
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• pp.57-66
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• 2012

When typical Z-source DC/AC inverter(ZSI) is operated in high voltage gain area, because of its high duty ratio, voltage and current stress in Z-network of typical ZSI are increased. This paper proposes a new switched trans ZSI(STZSI) with two switched trans cells which consist of one trans and two diodes. To confirm the operation performance of the proposed system, the PSIM simulation is performed for typical ZSI, switched inductor ZSI and the proposed STZSI. Voltage / current stress and transient state characteristics of each method are compared under the condition of DC input voltage 100[V] and output phase voltage 66[Vrms]. As a result, we confirmed that transient state of the proposed STZSI is short compared with the conventional ZSI because the high voltage gain is obtained using the same duty ratio, also a low duty ratio is required for the same output voltage. Finally, we could know the proposed system have low voltage and current stress in Z-network compared with the conventional ZSI.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2016년도 전력전자학술대회 논문집
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• pp.447-448
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• 2016

본 논문에서는 Quasi-Z-Source 인버터의 평균 모델을 이용하여 제어 시스템을 설계함으로써 기존 소신호 모델 기반 제어의 동작점이 변동하는 경우 과도 응답 특성이 저하되는 단점을 개선하고자 한다. 또한, PSIM 시뮬레이션을 통해 제시된 설계방법의 우수성을 실증하고자 한다.