A New Approach to Detect Load Sharing of Dual-Motors Driven and Controlled by a Single Converter using Only Three Current Sensors

Montero, Eduardo Rodriguez; Vogelsberger, M. A.; Bazant, Martin Z.; Wolbank, T.M.

doi:10.1109/icem49940.2020.9270732

Cited by 3 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, a configuration consisting of three current sensors is proposed [18]. As shown in Fig.…”

Section: Proposed Current Sensor Configurationmentioning

confidence: 99%

“…To calculate the phase shift difference of (11), in contrast to the PLL of [18], a zero crossing detector is implemented for each motor, which requires less computational resources. Note that, for the calculation of , only angle difference is required, and not the individual phase shifts.…”

Section: Block Diagrammentioning

confidence: 99%

“…Phase-C current is obtained as in (4). An example of phase current slope vector combination is shown in (17)(18) for excitation with 100 and 011 inverter states. − = ,…”

Section: M1 Saliency Vectormentioning

confidence: 99%

“…In a last step, for M1, an offset-less saliency vector ̅ , is created. Due to the signal processing of (17)(18), the effect of the transient leakage inductance offset L0 (which results from the symmetrical machine only) is mathematically compensated. Note that, in (18) only one single saliency Lm is represented for clarity reasons.…”

Section: M1 Saliency Vectormentioning

confidence: 99%

“…In the same way, − and − are also calculated from the C current slope scalar subtraction used in (18). A vector sum of the resulting C current slope differences is further performed in (21) to transform saliencies into a vector.…”

Section: M2 Saliency-offset Vectormentioning

confidence: 99%

See 4 more Smart Citations

Sensorless Saliency-Based Control of Dual Induction Machines Under Dynamic Load Imbalances Using Three Current Sensors

Montero

Vogelsberger²,

Wolbank

2023

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

To perform vector control of single-inverter dual induction motors, drives are standardly equipped with current and position sensors. In medium-power railway applications, a shaft encoder is usually mounted on each motor, and the inverter output current is measured using two current sensors. Yet, this configuration features some disadvantages. First, torque-sharing cannot be computed because stator current of each motor is unknown. Similarly, saliency extraction of each motor is not achievable since individual current drawn by each motor is not measured. An option that achieves torque-sharing calculation is to attach two current sensors to each motor, provided that both rotor positions are known. However, industrial inverter/control platforms considered offer a maximum of three input channels for current sensors. Besides, some industry fields tend towards encoderless speed control. Therefore, this paper proposes to use three current sensors in total and no shaft encoders. Thanks to a special current sensor arrangement and a voltage step excitation method, saliency-based encoderless control is achieved. In addition, a method is presented to estimate torque-sharing. Experimental measurements, taken on a dual induction motor test bench, will show the capability of the proposed methodology to identify individual loading as well as excellent encoderless control performance.

show abstract

“…In this work, a configuration consisting of three current sensors is proposed [18]. As shown in Fig.…”

Section: Proposed Current Sensor Configurationmentioning

confidence: 99%

Section: Block Diagrammentioning

confidence: 99%

“…Phase-C current is obtained as in (4). An example of phase current slope vector combination is shown in (17)(18) for excitation with 100 and 011 inverter states. − = ,…”

Section: M1 Saliency Vectormentioning

confidence: 99%