A Three-Phase Current Reconstruction Strategy With Online Current Offset Compensation Using a Single Current Sensor

Cho, Younghoon; LaBella, Thomas; Lai, Jih-Sheng

doi:10.1109/tie.2011.2171177

Cited by 132 publications

(51 citation statements)

References 27 publications

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“…This paper describes the current reconstruction and offset compensation strategy in TPPII, utilizing the method in [18]. Therefore, it simultaneously presents both the advantages and disadvantages that exist in [18]. It is possible to restore all phase currents of TPPII with only two current sensors.…”

Section: Introductionmentioning

confidence: 99%

A Current Reconstruction at Parallel Three Phase Inverters Using Two Current Sensors

et al. 2019

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In this paper, a current restoration method which can be applied to three phase parallel interleaved inverters (TPPII) using two current sensors has been proposed. In the proposed current reconstruction method, the branch current and the phase current of the two phases of the TPPII are sampled concurrently at the peak and valley of the pulse width modulation (PWM) carrier using two hall-effect sensors. Then, the phase current of each inverter is reconstructed by analyzing the sensed current with the current conduction path information according to the switch state in the peak and valley of the PWM carrier. This paper additionally analyzes the characteristics of the offset occurring in the detection process of two current sensors and it proposes a compensation method to reduce the offset on-line. In order to at once reduce the offset of the three-phase recovery current caused by the DC offset of the sensor, a coordinate conversion method and a low pass are used. To verify the performance of the proposed current recovery method and real-time offset compensation method, a simulation using PSIM software was performed, and experiments were conducted using a three phase parallel inverter composed of insulated gate bipolar transistor (IGBT) modules. In particular, the AC offset that occurred in the sampling process during the experiment was analyzed and modeled, and it was reduced by simple calculation.

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Section: Introductionmentioning

confidence: 99%

A Current Reconstruction at Parallel Three Phase Inverters Using Two Current Sensors

et al. 2019

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“…In the case of switched reluctance motors, it is necessary to measure the current in each phase winding, but, in [13], the number of sensors is reduced using reconstruction techniques. In [14], a three-phase current reconstruction technique is presented for three-phase inverters, using only one current sensor. In addition, in [15], a parabolic current control for a single phase inverter is presented, without measuring the current but rebuilding it.…”

Section: Introductionmentioning

confidence: 99%

AC Mains Synchronization Loop for Precalculated- Based PFC Converters Using the Output Voltage Measure

et al. 2018

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Common implementations of power factor correction include sensors for the input and output voltages and the input current. Many alternatives have been considered to reduce the number of sensors, especially the current sensor. One strategy is to precalculate the duty cycles that must be applied to every ac main, so the system only needs to synchronize them with the input voltage, and include a simple output voltage loop. The main problem with this approach is the sensibility to any synchronization error, because the input current is not measured, so its evolution is not continuously corrected. This paper shows how the synchronization error alters the current and the power factor, and it proposes several methods to detect and correct this error. All methods use the output voltage ADC, which is already used to control the output voltage, so the cost of the system is not increased. This technique can also be applied to any current sensorless PFC converter, because they are usually affected by leading or lagging currents, so the synchronization can be modified to reduce these effects. Results show that the implementation of this synchronization loop keeps a high-power factor under a wide synchronization error range, while the added logic is not significant.

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“…In order to provide high-accuracy phase current reconstruction over a wide range of operating conditions with a low current waveform, over the past years, many kinds of methods of improved PWM modulation strategy have been proposed for the single DC-link current sensor technique [5]- [16]. Although many improvement methods show reasonable phase current reconstruction performance, these methods suffer from complicated algorithms to implement phase current estimation [17]. Except the aforementioned mainstream, there have appeared other current estimation methods in recent years [18] and [19].…”

Section: Introductionmentioning

confidence: 99%

Single Phase Current Sensor-Based Model Predictive Torque Control for PMSM Drives

Teng¹,

Li²,

Bai³

2017

IJCA

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A Three-Phase Current Reconstruction Strategy With Online Current Offset Compensation Using a Single Current Sensor

Cited by 132 publications

References 27 publications

A Current Reconstruction at Parallel Three Phase Inverters Using Two Current Sensors

A Current Reconstruction at Parallel Three Phase Inverters Using Two Current Sensors

AC Mains Synchronization Loop for Precalculated- Based PFC Converters Using the Output Voltage Measure

Single Phase Current Sensor-Based Model Predictive Torque Control for PMSM Drives

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