Space vector-based analysis of overmodulation in triangle-comparison based PWM for voltage source inverter

Modi, Manoj Kumar; Venugopal, S.; Narayanan, G.

doi:10.1007/s12046-013-0149-x

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…The high and low duration pulses become equal provided the modulating signal has zero magnitudes. Since the amplitude of the modulated signal decides the width of the pulses, hence, this scheme of modulation is called as amplitude modulation [20]. Thus, this is defined as the ratio of the amplitude of the modulating signal, (V m ) to that of the amplitude of the carrier wave, (V c ), i.e.…”

Section: Modulation Indexmentioning

confidence: 99%

Modulation index effect on inverter based induction motor drive

Sharma

Anandh

Gao

2020

IJPEDS

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Due to a substantial increase in the use of inverter for numerous electrical appliances starting from domestics to industrial drives, an inverter may be directly connected to the power grid system. The dependency on an inverter has been increased over the years. Hence, the proper and efficient design of the inverter will lead to higher efficiency. One of the major challenges is the generation of suitable gate pulses for power switching devices, which in turn depends on the modulation index. The selection of proper modulation index will help in the production of the rated voltage. If the modulation index is less, the duration of on-time pulses will be less and hence, the device's conduction time is also less, thereby the output voltage of the inverter is reduced. A reduced voltage, when applied to an induction motor will have lower speed and even its performance will be sluggish. The speed of the motor improves when it is operated in a closed-loop for the same modulation index. This research paper tries to bring out the effect of modulation index on speed control of an induction motor based on an inverter for both open as well as closed-loop operation. The simulated results indicate that the modulation index in the vicinity to unity will provide rated voltage for the smooth operation of the motor.

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Section: Modulation Indexmentioning

confidence: 99%

Modulation index effect on inverter based induction motor drive

Sharma

Anandh

Gao

2020

IJPEDS

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“…In over-modulation region I, where MI ranges from 0.906 to 0.952, the actual voltage vector keeps the same phase angle of the control voltage vector as in linear modulation region, but its amplitude varies over time, in which the inverter can only provide partial control ability. In over-modulation region II, corresponding to MI ranging from 0.952 up to 1, both the amplitude and angle of the control voltage vector are modified [6,16,17], in which the inverter can just provide even more limited partial control ability when compared to over-modulation region I. When MI reaches 1, the control voltage generated from the controller needs to be saturated, since the inverter has reached the maximum possible voltage and the inverter works on the six-step modulation [18].…”

Section: Control Of Ipm Motor In Linear To Over-modulation Regionsmentioning

confidence: 99%

“…As (16) only contains 13 multiplications and summations, as well as one division, so that the processing time can be reduced to 0.16 µs with at least 93% accuracy within the NN operating range, so that the performance of the NN controller is not affected.…”

Section: Implementation Of Pi or Nn Control Modulementioning

confidence: 99%

DSP Implementation of a Neural Network Vector Controller for IPM Motor Drives

Sun

Ramezani

et al. 2019

Energies

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This paper develops a neural network (NN) vector controller for an interior mounted permanent magnet (IPM) motor by using a Texas Instrument TMS320F28335 digital signal processor (DSP). The NN controller is developed based on the complete state-space equation of an IPM motor and it is trained to achieve optimal control according to approximate dynamic programming (ADP). A DSP-based NN control system is built for an IPM motor drives system, and a high efficient DSP program is developed to implement the NN control algorithm while considering the limited memory and computing capability of the TMS320F28335 DSP. The DSP-based NN controller is able to manage IPM motor control in linear, over, and six-step modulation regions to improve the efficiency of IPM drives and to allow for the full utilization of DC bus voltage with space-vector pulse-width modulation (SVPWM). The experiment results show that the proposed NN controller is able to operate with a sampling period of 0.1ms, even with limited DSP resources of up to 150 MHz cycle time, which is applicable in practical motor industrial implementations. The NN controller has demonstrated a better current and speed tracking performance than the conventional standard vector controller for IPM operation in both the linear and over-modulation regions.

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“…In the linear region of feed-forward (carrier based) space vector based PWM techniques, like SVM, the reference voltage vector has a uniform magnitude and rotates at a constant angular frequency. In the overmodulation region the angle and the magnitude of the reference voltage vector should be modified by passing it through a preprocessor or premodulator [3], [4], [5], [6]. It results in a non-uniform magnitude or nonuniform angular frequency (or both) of the reference voltage vector.…”

Section: State Of the Art A Overmodulationmentioning

confidence: 99%

Optimization of PWM for the Overmodulation Region of Two-Level Inverters

Stumpf

Halasz

2018

IEEE Trans. on Ind. Applicat.

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Three optimized PWM techniques for the overmodulation region of two-level inverter-fed ac drives are introduced and investigated from harmonic loss minimization point of view. The optimization is elaborated for the lowest loss-factor, which is proportional to the square of rms value of current harmonics. The loss-factors are computed for different switching numbers as the function of the motor fundamental voltage. It is shown that, respect to the motor heating and torque ripples, the acceptable drive condition can be guaranteed by relatively low value of inverter switching frequency up to 96-97% of maximal possible motor voltage. Furthermore, it is shown that, the so-called Three vector methods have considerably better performance in the lower part of the overmodulation region than the so-called Two vector method for the same number of switching. The performance of the techniques is compared with other existing PWM techniques. The paper discusses the implementation details of the proposed optimal PWM techniques. The theoretical results are verified by experimental and simulation tests.

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Space vector-based analysis of overmodulation in triangle-comparison based PWM for voltage source inverter

Cited by 15 publications

References 30 publications

Modulation index effect on inverter based induction motor drive

Modulation index effect on inverter based induction motor drive

DSP Implementation of a Neural Network Vector Controller for IPM Motor Drives

Optimization of PWM for the Overmodulation Region of Two-Level Inverters

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