Section 2 recalls the model of the three-phase two-level VSI and a generalized carrier-based representation of PWM strategies studied in this paper is given. In section 3, three criteria are given in order to evaluate every strategy. They are applied on several strategies in section 4 and verified with a real test bench in section 5.
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үндэс суурь. Зохион байгуулалтын баримт бичиг нь тэдний тусламжтайгаар, иргэний болон захиргааны эрх зүйн хэм хэмжээг хэрэгжүүлэх, байгууллагын үндэс суурь юм. Ийм баримт бичиг заавал тэд ...
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The way to integrate optimal PWM with Field-Oriented Control (FOC) is studied, by adding a stator current observer in the FOC, the harmonics of the feedback currents are decreased and the voltage disturbances generated from the current control loop are reduced.
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A new feed forward dc-link voltage compensation method is proposed which can be tuned in a way to minimize the grid side total harmonic distortion (THD) and partial weighted harmonic distort (PWHD): thus, the converter can comply with the standards with less filtering at the gridside. Expand. 10. 1 Excerpt.
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In this paper, the overmodulation region voltage-gain characteristics and waveform quality of carrier-based pulsewidth-modulated (PWM) methods are investigated. Through detailed analytical study, voltage-gain characteristics are extracted independent of carrier frequency. The influence of blanking time and minimum pulsewidth (MPW) control on the inverter …
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Pulse-width modulation (PWM) voltage source inverters (VSIs) are favorable interface devices to the power grid for renewable energy systems. This paper deals with the design of the LCL-filter and inverter for the grid-connected VSI. A complete design procedure for both reactive and passive components of LCL-filter is demonstrated with a new iterative …
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Description. The induction motor is fed by a PWM inverter, which is built using a Universal Bridge Block. The speed controller consists in a PI regulator that produces a slip compensation, which is added to the rotor speed in order to derive the commanded stator voltage frequency. A constant volts per hertz ratio is also applied to the motor.
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Кирил бичгийн зөв бичихзүй [засварлах] Үндэсний бичгийн зөв бичихзүй [засварлах] Орчуулга [засварлах] Товчилсон үг [засварлах] Хэлц үг [засварлах] Өвөрмөц хэлц [засварлах] Хэвшмэл хэлц ...
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Current measurement and pulsewidth modulation (PWM) are critical components of modern current-controlled voltage source inverters. Current measurements enable accurate and robust closed-loop control of current, while PWM enables the efficient high-bandwidth regulation of the voltage. These two components do not operate …
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Generally, there exists a voltage distortion or nonlinear voltage gain between the reference and output voltages in a pulsewidth-modulation (PWM) voltage source inverter (VSI). Nonlinearity varies with operating conditions, such as the temperature, direct current (dc) bus voltage, and phase current level. Also, the nonlinearity affects the …
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When calculating the permanent magnet (PM) eddy current loss (ECL) in the interior permanent magnet synchronous machine (IPMSM) under pulse width modulation (PWM) voltage source inverter (VSI) supply, it is very important to take the high frequency harmonic voltages (HFHVs) in the input voltage into consideration because most of the PM ECL in …
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This paper evaluates the current control methods for three-phase voltage-source-inverters (VSIs) connected to the grid via LCL-filters. Current feedback methods from both line and converter sides are compared and theoretical analysis is stated. The analysis is based on the existence of a critical resonant frequency dividing the controlling frequency interval …
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The PCL Series Vertical Shaft Impact(VSI) crusher was improved on basis of the technology of Barmac,it has had a huge impact on the global quarrying and minerals processing industries.The Barmac PCL Series VSI is unique due to its crushing process.Whereas most other types of crusher use metallic parts to crush rock. Barmac …
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This paper presents an efficient, cost effective design implementation of a hybrid digital architecture for space vector pulse width modulation (SVPWM) method for multilevel inverters (MLIs). The SVPWM method is one of the most popular real time PWM method for three phase voltage source inverter (VSI). The implementation of SVPWM …
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Flux Vector Speed vs. Torque. Pulse Width Modulated (PWM) Force Technology uses patented, high bandwidth current regulators in combination with an adaptive controller, …
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In this paper, it is first observed from the experimental investigation that common-mode-voltage generated by PWM VSI is tightly related to the shaft voltage and bearing current of the driven induction motors. Based on this observation, this paper proposed a novel Active Common-mode-voltage Compensator (ACCom), which consists of a single-phase …
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Circuit diagram of a PWM-VSI drive connected to an R-L-E-type load. Triangle intersection PWM phase " a " modulation and switching signals. The space-vector diagram illustrates the direct digital ...
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A new on-line dead-time compensation technique for low-cost open-loop pulsewidth modulation voltage-source inverter (PWM-VSI) drives is presented. Because of the growing numbers of open-loop drives operating in the low-speed region, the synthesis of accurate output voltages has become an important issue where low-cost implementation plays an …
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Zhengzhou KETCHAN индукцийн халаалтын систем Олон төрлийн үйлдвэрлэлийн хэрэглээ, дэвшилтэт бүтээгдэхүүний технологи, зах зээлийн өмнөх төгс үйлчилгээ, хэрэглээний олон туршлага зэрэгт өргөн хэрэглэгддэг бөгөөд бидэнтэй ...
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To improve the reliability of three-phase voltage source inverters (VSI) used in aircraft steering gear systems, a diagnosis technique is proposed for intermittent single/double semiconductor switch open circuit faults (ISOCF/IDOCF) of VSIs. Existing methods struggle to handle intermittent failures of multiple semiconductor switches in aircraft steering gear …
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Abstract: A generalized carrier-based pulsewidth modulation (CB-PWM) scheme is proposed here for the elimination of common-mode voltage (CMV) in a multilevel multiphase voltage source inverter (VSI). In this CB-PWM scheme, the switching function of x-level q-phase VSI is obtained from the switching function of virtual y-level and ( y +1) …
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In this paper, we propose an extended permanent magnet synchronous motor model that incorporates a quadratic flux-current function to determine the polarity-dependent …
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We have proposed a fast diagnosis technique for IGBTs open-circuit faults in PWM-VSI-fed induction motor drives. Fault diagnosis has been achieved by analyzing …
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This paper presents different compensation techniques based on feedforward and feedback techniques for obtaining an ideal PWM-VSI inverter for AC machines. Linearities like blanking time, voltage drop across the power devices and DC link voltage ripple cause torque and speed fluctuations in the AC machine. Different techniques are proposed and …
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Improved modulation techniques for PWM-VSI drives Abstract: PWM-VSI based AC motor drives have two main problems. The inverter is nonlinear which causes instability …
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This paper presents a simple space vector approach for the generation of different switching sequences such as Space Vector Pulse Width Modulation (SVPWM), Basic Bus Clamping PWM (BBCPWM) and Advanced Bus Clamping PWM (ABCPWM) algorithms with reduced complexity. It brings out alikeness between the carrier comparison and space vector …
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In this paper, the overmodulation region voltage-gain characteristics and waveform quality of carrier-based pulsewidth-modulated (PWM) methods are investigated. Through detailed analytical study, voltage-gain characteristics are extracted independent of carrier frequency. The influence of blanking time and minimum pulsewidth (MPW) …
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Recent advancement in power semiconductors has been remarkable, and the number of power devices described in the literature is staggering and bewildering to both power device specialists and power electronics equipment designers. This paper identifies the main high voltage power switches suitable for a multi-megawatt, Pulse Width Modulated (PWM), …
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Индукцийн ороомог. Ороомгууд. Индукцийн ороомгийг төлөөлөх тэмдэглэгээ. Индукцийн ороомог нь индукцлэх шинж чанараараа цахилгаан хэлхээнд өргөн ашиглагддаг пассив элемент юм.
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Abstract: Pulse-width-modulated (PWM) voltage source inverters (VSI) are a common way to drive induction motors in variable speed applications. As switching hardware …
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