Optimal Regular-Sampled PWM Inverter Control Techniques

Bowes, S.R.; Holliday, Derrick

doi:10.1109/tie.2007.894767

Cited by 102 publications

(34 citation statements)

References 27 publications

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“…The commonly used special synchronous modulation methods can be divided into two categories. The first class includes synchronous optimal modulation techniques, such as SHE-PWM (selective harmonic elimination-pulse width modulation) [3], [4]. The other class is made up of non-optimized special synchronous modulation techniques, such as central 60° synchronous modulation [5], [6].…”

Section: Introductionmentioning

confidence: 99%

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Fang¹,

Lin²,

Yang³

2016

Journal of Power Electronics

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Central 60° synchronous modulation is an easy pulse-width modulation (PWM) method to implement for the traction inverters of urban rail trains at a very low switching frequency. Unfortunately, its switching patterns are determined by a Fourier analysis of assumed steady-state voltages. As a result, its transient responses are not very good with over-currents and high instantaneous torque pulses. In the proposed solution, the switching patterns of the conventional central 60° modulation are modified according to the dynamic error between the target and actual stator flux. Then, the specific trajectory of the stator flux and current vector can be guaranteed, which leads to better system transients. In addition, stator flux control is introduced to get smooth mode switching between the central 60° modulation and the other PWMs in this paper. A detailed flow chart of the control signal transmission is given. The target flux is obtained by an integral of the target voltage. The actual PMSM flux is estimated by a minimum order flux state observer based on the extended flux model. Based on a two-level inverter model, improved rules in the α-β stationary coordinate system and equations of the switching patterns amendment are proposed. The proposed method is verified by simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Fang¹,

Lin²,

Yang³

2016

Journal of Power Electronics

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“…The timings are decided by the PWM settings. A detailed analysis of PWM techniques can be found in [8].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Bacterial Foraging Algorithm for Optimization of Boost Inverter Parameters

Arunkumar¹,

Gnanambal²

2016

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This paper proposes a boost inverter model capable of coping with changes in load as well as line parameters. In order to achieve an output AC voltage higher than the input DC voltage, we can use this model consisting of a pair of DC-DC converters with a load connected differentially across them. This paper aims at developing a boost inverter that is capable of achieving a very high gain, to obtain an AC voltage of 110 Vrms from a DC input of 36 V. This is exceptionally beneficial in renewable energy applications, where the input voltage garnered is quite small, and in need of stepping up for commercial use or transmission. However, aside from the voltage level itself, lowering the rise time, settling time, peak overshoot and steady state error of the system is of cardinal importance in order to maintain a reliable output voltage. Closed loop control of the differentially connected DC-DC converters is necessary to determine the optimal stable operating point. This paper addresses the above concerns through optimization of the proportional and integral constants using the novel Bacterial Foraging Algorithm, ensuring operation at the required optimal stable operating point. Moreover, load/line disturbances may occur due to which the stability of output voltage may be compromised and THD value may increase to undesirable extents. In these cases, utilization of the output voltage is no longer viable for several applications sensitive to such voltage fluctuations. We have demonstrated that our proposed model is capable of restoring/reverting to the satisfactory sinusoidal waveform fashion within a single voltage cycle. The waveform results that demonstrate the resilience of our model to such disturbances are represented appropriately.

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“…It is implemented by comparing a sinusoidal reference signal with a high frequency triangle (carrier) signal [11], 12]. The high frequency carrier signal is generated using an up-down counter which is readily available in microcontrollers for motion control.…”

Section: Introductionmentioning

confidence: 99%

Implementation and experimental validation of efficiency improvement in PMSM drives through switching frequency reduction

Kshirsagar¹,

Krishnan

2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Energy efficiency improvement in variable speed motor drives is of widespread interest because of the rising cost of energy. Permanent magnet synchronous motor (PMSM) drives are especially favored in variable speed applications due to their high efficiency of operation. This research focuses on improving efficiency of the PMSM drive system by reducing the switching frequency of the inverter driving the motor. At reduced switching frequencies, programmed pulse width modulation methods that results in elimination or reduction of the low ordered sidebands of the currents are considered in this work. The study showcases new implementation aspects of programmed PWM and closed loop current control at reduced switching frequencies necessary to operate the PMSM drive system at higher efficiency. The experimental measurements validate the total system efficiency improvement at reduced switching frequencies.

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Optimal Regular-Sampled PWM Inverter Control Techniques

Cited by 102 publications

References 27 publications

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Utilization of Bacterial Foraging Algorithm for Optimization of Boost Inverter Parameters

Implementation and experimental validation of efficiency improvement in PMSM drives through switching frequency reduction

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