Dead time compensation method based on current ripple estimation

Mannen, Tomoyuki; Fujita, Hideaki

doi:10.1109/ecce.2013.6646781

Cited by 14 publications

(28 citation statements)

References 8 publications

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“…Dead-time effects are known to reduce the effectiveness of simultaneous switching for CM voltage reduction [12], [24]. Therefore, the proposed PWM strategy has been tested both with and without a conventional dead-time compensation method based on the measured direction of input and output phase currents [25]. Basically, turn-on (diode-to-transistor) commutations are identified so that their logical signals are time-shifted by the dead-time value for the actual voltage transition to occur at the expected instant.…”

Section: A Measurement Setupmentioning

confidence: 99%

PWM Strategy for the Cancellation of Common-Mode Voltage Generated by Three-Phase Back-to-Back Inverters

Videt

Messaoudi

Idir

et al. 2017

IEEE Trans. Power Electron.

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This paper presents a PWM strategy for the cancellation of common-mode (CM) voltage generated by three-phase back-to-back two-level inverters. This method theoretically provides complete elimination of the CM voltage by synchronizing all the commutations of one converter with commutations of the other one, so that the overall resulting CM voltage does not vary. The degrees of freedom of this strategy are studied and an experimental implementation is carried out on a 15 kW motor drive prototype to validate the method effectiveness. Taking into account dead-time compensation, measurements in time and frequency domains show that the CM voltage is strongly reduced and that more than 15 dB reduction is achieved in a wide frequency range.

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Section: A Measurement Setupmentioning

confidence: 99%

PWM Strategy for the Cancellation of Common-Mode Voltage Generated by Three-Phase Back-to-Back Inverters

Videt

Messaoudi

Idir

et al. 2017

IEEE Trans. Power Electron.

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“…On the other hand, with three‐level ACM in Fig. (c), compensating voltage is determined as follows:

Δ v = \{\begin{matrix} right V_{dc} \frac{T_{DT}}{T_{SW}} & right (\bar{i} < - i_{th}), \\ right 0 & right (- i_{th} < \bar{i} < i_{th}), \\ right - V_{dc} \frac{T_{D T}}{T_{SW}} & right (i_{th} < \bar{i}) . \end{matrix}

In linear ACM and three‐level ACM, relatively good approximation is achieved when the threshold current ( i th ) is set close to current ripple amplitude .…”

Section: Dead‐time Compensationmentioning

confidence: 99%

Performance of Dead‐Time Compensation Methods in Three‐Phase Grid‐Connection Converters

Mannen

Fujita

2016

Electrical Engineering Japan

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SUMMARY This paper discusses the performance of compensation methods for dead‐time voltage error in voltage‐source grid‐connection pulse‐width modulation converters. The theoretical analysis in this paper reveals the relationship between the voltage error and the current ripples through the converter. The analytical results imply that the voltage error is strongly affected by the amplitude of the current ripples as well as the source power factor. This paper proposes a new compensation method which makes it possible to use two lookup tables to reduce the calculation time in the controller. The compensation characteristics are compared by using a 200‐V 5‐kW three‐phase grid‐connection converter. As a result, conventional approximation‐based compensation methods exhibit an acceptable performance in a restricted power‐factor operation range. In contrast, the turn‐off transition‐based compensation method and the proposed method have a good compensation performance all over the power factor.

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“…Authors have proposed turn-off transition-based com pensation method (TTCM), whose compensating voltage is derived from the analytic result considering output capacitances of the switching devices [12]. Theoretical analysis in [12] reveals functions of the voltage error caused by the dead time and the turn-off current of three phase PWM converters.…”

Section: Introductionmentioning

confidence: 99%

“…Theoretical analysis in [12] reveals functions of the voltage error caused by the dead time and the turn-off current of three phase PWM converters. The feature of TTCM is that the compensating voltage is derived from the analytic result of the voltage error and the turn-off current.…”

Section: Introductionmentioning

confidence: 99%

“…TTCM can accurately compensate the voltage error and effectively suppress the current distortion regardless of the power factor. Since turn-off current estimation is employed in the TTCM, it is easy to implement this method into a popular microcontroller, instead of high-speed AID The dead time compensation for grid connection con verters has been discussed in [8], [12], on the assumption of a unity power factor, considering applications to PV converters. Grid-connection converters are operated under various conditions of power factor and modulation index, according to applications such as PV converters, STAT COMs, active power filters and so on.…”

Section: Introductionmentioning

confidence: 99%

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Performance of dead time compensation methods in three-phase grid-connection converters

Mannen

Fujita

2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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This paper discusses effect of the power factor on voltage error caused by the dead time in voltage-source grid-connection PWM converters. The theoretical analysis derives the voltage error considering output capacitances of the switching devices and brings out that the voltage error depends on the current ripple amplitude through the converter which is changed by the power factor. The analytical result reveals the compensation characteristics of three approximation compensation methods and turn-off transition-based compensation method from the viewpoint of the power factor. The compensation characteristics of four different compensation methods are compared with those with each other in experiments using a 200-V, 5-kW three-phase grid-connection converter. As a result, the approximation compensation methods exhibit a good compensation performances at a specific power factor. In contrast, the turn-off transition-based compensation method has a better compensation performance allover the range of power factor.

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Dead time compensation method based on current ripple estimation

Cited by 14 publications

References 8 publications

PWM Strategy for the Cancellation of Common-Mode Voltage Generated by Three-Phase Back-to-Back Inverters

PWM Strategy for the Cancellation of Common-Mode Voltage Generated by Three-Phase Back-to-Back Inverters

Performance of Dead‐Time Compensation Methods in Three‐Phase Grid‐Connection Converters

Performance of dead time compensation methods in three-phase grid-connection converters

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