High-frequency modelling of a three-phase pulse width modulation inverter towards the dc bus considering line and controller harmonics

Aiming at the problem of large magnitude and high frequency of common-mode voltage (CMV) when space vector pulse width modulation (SVPWM) is used in a three-phase motor fed by a two-level voltage source inverter, a common-mode reduction SVPWM (CMRSVPWM) is studied. In this method, six new sectors are obtained by rotating six sectors of conventional SVPWM by 30°. In odd-numbered sectors, only three non-zero vectors with odd subscripts are used for synthesis, while in even-numbered sectors, only three non-zero vectors with even subscripts are used for synthesis. The actuation durations of three non-zero vectors in each switching period in each sector are given. Simulation and experimental results show that, compared with the conventional SVPWM, the CMV magnitude of CMRSVPWM is reduced by 66.67% and the CMV frequency of CMRSVPWM is reduced from the original switching frequency to the triple fundamental frequency. At the same time, the current, torque and speed of the motor are still good.

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Hybrid Pulse Width Modulation Strategy of a High-Frequency Link Three-Phase Four-Leg Matrix Converter Based on Compensation Theory

Applied Sciences ◽

10.3390/app10010039 ◽

2019 ◽

Vol 10 (1) ◽

pp. 39

Author(s):

Rutian Wang ◽

Fuxu Wang ◽

Haining Pan ◽

Sutong Liu

Keyword(s):

High Frequency ◽

Pulse Width ◽

Pulse Width Modulation ◽

Matrix Converter ◽

Compensation Method ◽

Switching Frequency ◽

Control Logic ◽

Compensation Strategy ◽

High Switching Frequency ◽

Three Phase

A high-frequency link (HFL) three-phase four-leg matrix converter (MC) can output three-phase balanced voltage for unbalanced load conditions. It is an inverter with great development potential. This paper presents a hybrid pulse width modulation (HPWM) strategy for a four-wire matrix converter based on the fourth bridge leg compensation method. Firstly, the rear-stage topology of a high-frequency link three-phase four-leg matrix converter is decoupled into two sets of ordinary three-phase four-wire inverters. Then the compensation strategy is applied to separate the fourth bridge leg from the coupling of the ordinary inverter and realize its independent control. Under the theory of compensation, the fourth bridge leg plays a role in compensating the deviation of the neutral point potential when the load is unbalanced, the fourth bridge leg does not need to work when the load is balanced. Finally, the fourth bridge leg modulation wave obtained by the compensation method is combined with the front three bridge leg modulation waves to perform the coupling control using the hybrid pulse width modulation strategy. It has changed the problem that the previous hybrid pulse width modulation strategy cannot be directly applied to the four-wire matrix converter. This strategy is simple to control, without adding any auxiliary commutation detection circuitry, can effectively solve the inherent commutation problem in the bidirectional switch tube of the four-wire matrix converter. It simplifies the complexity of the system, reduced control cost, and high switching loss caused by high switching frequency. The fast adjustment function of compensation strategy makes the dynamic response performance of system under load fluctuation state more prominent, the harmonic distortion rate is smaller. The perfect combination of two strategies allows the high-frequency link three-phase four-leg matrix converter with any form of load to give full play to its structural advantages. The related work verifies the feasibility and effectiveness of the modulation method and control logic.

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DC Bus Current Sensed Space Vector Pulse Width Modulation for Three-Phase Inverter

IEEE Transactions on Transportation Electrification ◽

10.1109/tte.2020.3029046 ◽

2020 ◽

pp. 1-1

Author(s):

Yongpeng Shen ◽

Zhufeng Zheng ◽

Qiancheng Wang ◽

Pu Liu ◽

Pu Liu

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Space Vector ◽

Phase Inverter ◽

Three Phase ◽

Dc Bus ◽

Three Phase Inverter

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Space Vector Pulse Width Modulation Technique for Five-to-Three Phase Direct Matrix-Converter: Integration of Multi-Phase Generation into Existing Three-Phase Grid System

International Journal on Energy Conversion (IRECON) ◽

10.15866/irecon.v8i1.18734 ◽

2020 ◽

Vol 8 (1) ◽

pp. 16

Author(s):

Ziad M. Ali ◽

Omar Abdel-Rahim

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Matrix Converter ◽

Grid System ◽

Space Vector ◽

Modulation Technique ◽

Three Phase ◽

Multi Phase

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Simulation of Three Phase Sine Wave Generation for Pulse Width Modulation (PWM)

International Journal of Scientific and Research Publications (IJSRP) ◽

10.29322/ijsrp.9.04.2019.p8807 ◽

2019 ◽

Vol 9 (4) ◽

pp. p8807

Author(s):

Toe Toe Hlaing

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Sine Wave ◽

Wave Generation ◽

Three Phase

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Resonant BLDC Motor Drive System for Medical Applications

Current Signal Transduction Therapy ◽

10.2174/1574362414666191016153727 ◽

2019 ◽

Vol 14 ◽

Author(s):

C. Vidhya ◽

V. Ravikumar ◽

S. Muralidha

Keyword(s):

High Frequency ◽

Pulse Width Modulation ◽

Power Converter ◽

Low Power Consumption ◽

Motor Drive ◽

Medical Applications ◽

Bldc Motor ◽

Three Phase ◽

High Frequency Ac ◽

Motor Drive System

: The objective of this paper is to implement an ac link universal power converter controlled BLDC motor for medical applications. The ac link universal power converter is a soft switched high frequency ac link converter, created using the parallel combination of an inductor and a capacitor. The parallel ac link converter handle the ac voltages and currents with low reactive ratings at the link and offers improved power factor, low power consumption, more efficiency and less weight on comparison with the traditional dc link converter. Because of the high throughput, BLDC motors are preferred widely medical applications. A modulation technique called Space Vector Pulse Width Modulation (SVPWM) is used to generate the three phase power for the BLDC motors from the input DC supply. To validate the proposed system, simulations are performed in MATLAB – Simulink and an experimental prototype is constructed to supplement the simulation results.

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