A hybrid, current-source/voltage-source power inverter circuit

2001 ◽  
Vol 16 (6) ◽  
pp. 866-871 ◽  
Author(s):  
A.M. Trzynadlowski ◽  
N. Patriciu ◽  
F. Blaabjerg ◽  
J.K. Pedersen
Keyword(s):  
Current Source ◽  
Voltage Source ◽  
Source Power ◽  
Source Voltage ◽  
Inverter Circuit

scholarly journals A Different Voltage-Source Power Inverter with Carrier Based SPWM for Open-End Connection Loads

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3251
Author(s):  
Suroso ◽  
Daru Tri Nugroho ◽  
Toshihiko Noguchi
Keyword(s):  
Pulse Width Modulation ◽  
Voltage Source ◽  
Test Results ◽  
Source Power ◽  
Power Sources ◽  
Pwm Inverter ◽  
Dc Power ◽  
Ac Motor ◽  
Input Side ◽  
Inverter Circuit

This paper presents a new configuration of voltage source inverter with a simplified circuit for generating five-level pulse width modulation (PWM) voltage waveform. Compared with conventional inverter configuration, this circuit is drastically able to simplify the structure and reduce the required number of active switch components. The new inverter circuit is very suitable for the use of open-end connection loads such as open-end winding ac motor drive application. Instead of using separated dc power sources, the new inverter circuit configuration is also possible to utilize only one dc voltage source, so the power supply circuits can be made simpler. Furthermore, to reduce ripples of dc capacitor voltages, the voltage stabilizing circuit of capacitors at the input side was proposed and applied. The stabilizing circuit is capable to work reducing the size of dc capacitors, and maintaining voltage stability of capacitors through charging and discharging operation modes. The working principles of inverter circuit were evaluated and examined by means of computer simulations using PSIM software. In addition, experimental test results of the prototype were also provided. Test results proved that the new five-level PWM inverter operated well generating five-level output waveform with smaller distortion and less voltage ripples of dc capacitors.

scholarly journals Is It Possible to Obtain Benefits by Reducing the Contribution of the Digital Signal Processing Techniques to the Control of the Active Power Filter?

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6031
Author(s):  
Andrzej Szromba
Keyword(s):  
Control Method ◽  
Current Source ◽  
Active Power ◽  
Active Filter ◽  
Current Control ◽  
Active Filters ◽  
Control Technique ◽  
Voltage Source ◽  
Source Power ◽  
Reference Signals

This paper presents a simple yet efficient control method for active power filters that can be used to improve power quality. Applying this method can open the way towards limiting the hardware and computational expenditure, which are needed for control of the active filter, while maintaining its required performance. The method is based on the indirect approach of obtaining reference signals combined with the closed-loop current control technique. Monitoring of changes of energy stored in reactance elements of the active filter is the base for obtaining reference signals for compensation. The active filter can perform classical compensation and, additionally, can perform some extra functionality for managing of active power in the system. In particular, it can stabilize the supplying source power, enable energy exchange between loads connected on DC and AC sides of the active filter, and—in a case of generating loads—enable their energy storage and redistribution amongst consuming loads. The presented method can be useful for voltage-source as current-source inverter based active filters, and for DC systems as well as for AC single- or three-phase ones.

scholarly journals A nine-level hybrid current source inverter using common-emitter topology and inductor-cell

2019 ◽  
Vol 10 (2) ◽  
pp. 852 ◽  
Author(s):  
Suroso Suroso ◽  
Daru Tri Nugroho ◽  
Toshihiko Noguchi
Keyword(s):  
Pulse Width Modulation ◽  
Current Source ◽  
Low Frequency ◽  
Modulation Method ◽  
Current Waveform ◽  
Current Output ◽  
Source Power ◽  
The Common ◽  
Cell Circuit ◽  
Inverter Circuit

<p>A different circuit structure of nine-level current source power inverter is presented and discussed in this manuscript. The proposed topology is based on the common-emitter inverter topology equipped with an inductor-cell circuit. The common-emitter inverter works as the main inverter circuits delivering a three-level AC current waveform. The inductor-cell circuit produces the intermediate output current levels for nine-level current output waveform. Proportional integral current controller was applied to regulate the current streaming thru the inductor-cell. Multi triangular carrier signals based sinusoidal pulse width modulation method was utilized to obtain a lower waveform distortion. The proposed nine-level inverter circuit was tested and examined. The test results verified that the new nine-level inverter circuit worked well producing a nine-level current waveform with less low-frequency harmonic components.</p>

scholarly journals Contribution of Voltage Support Function to Virtual Inertia Control Performance of Inverter-Based Resource in Frequency Stability

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4220
Author(s):  
Dai Orihara ◽  
Hiroshi Kikusato ◽  
Jun Hashimoto ◽  
Kenji Otani ◽  
Takahiro Takamatsu ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Function ◽  
Current Source ◽  
Voltage Control ◽  
Frequency Stability ◽  
Voltage Regulation ◽  
System Stability ◽  
Voltage Source ◽  
Apparent Difference ◽  
Virtual Inertia

Inertia reduction due to inverter-based resource (IBR) penetration deteriorates power system stability, which can be addressed using virtual inertia (VI) control. There are two types of implementation methods for VI control: grid-following (GFL) and grid-forming (GFM). There is an apparent difference among them for the voltage regulation capability, because the GFM controls IBR to act as a voltage source and GFL controls it to act as a current source. The difference affects the performance of the VI control function, because stable voltage conditions help the inertial response to contribute to system stability. However, GFL can provide the voltage control function with reactive power controllability, and it can be activated simultaneously with the VI control function. This study analyzes the performance of GFL-type VI control with a voltage control function for frequency stability improvement. The results show that the voltage control function decreases the voltage variation caused by the fault, improving the responsivity of the VI function. In addition, it is found that the voltage control is effective in suppressing the power swing among synchronous generators. The clarification of the contribution of the voltage control function to the performance of the VI control is novelty of this paper.

scholarly journals Bandwidth and Common Mode Optimization for Current and Voltage Sources in Bioimpedance Spectroscopy

2021 ◽  
Vol 12 (1) ◽  
pp. 135-146
Author(s):  
Tobias Menden ◽  
Jascha Matuszczyk ◽  
Steffen Leonhardt ◽  
Marian Walter
Keyword(s):  
Patient Safety ◽  
Current Source ◽  
The Body ◽  
Voltage Source ◽  
Bioimpedance Spectroscopy ◽  
Laboratory Measurements ◽  
Output Impedance ◽  
Frequency Range ◽  
Common Mode ◽  
High Bandwidth

Abstract Bioimpedance measurements use current or voltage sources to inject an excitation signal into the body. These sources require a high bandwidth, typically from 1 kHz to 1 MHz. Besides a low common mode, current limitation is necessary for patient safety. In this paper, we compare a symmetric enhanced Howland current source (EHCS) and a symmetric voltage source (VS) based on a non-inverting amplifier between 1 kHz and 1 MHz. A common mode reduction circuit has been implemented in both sources. The bandwidth of each source was optimized in simulations and achieved a stable output impedance over the whole frequency range. In laboratory measurements, the output impedance of the EHCS had its -3 dB point at 400 kHz. In contrast, the VS reached the +3 dB point at 600 kHz. On average over the observed frequency range, the active common mode compensation achieved a common mode rejection of -57.7 dB and -71.8 dB for the EHCS and VS, respectively. Our modifications to classical EHCS and VS circuits achieved a low common mode signal between 1 kHz and 1 MHz without the addition of complex circuitry, like general impedance converters. As a conclusion we found VSs to be superior to EHCSs for bioimpedance spectroscopy due to the higher bandwidth performance. However, this only applies if the injected current of the VS can be measured.

Mathematical models of resonance and antiresonance processes

2021 ◽  
pp. 17-27
Author(s):  
V. D. Pavlov ◽  
Keyword(s):  
Current Source ◽  
Voltage Source ◽  
Complex Method ◽  
Connecting Rod ◽  
Parallel Connection ◽  
Near Resonance ◽  
Serial Connection ◽  
Mechanical Analogue ◽  
In Series ◽  
Pneumatic Cylinders

The use of the symbolic (complex) method has significantly simplified the study of resonance and near-resonance phenomena, in particular, it has made it possible to deeply unify and formalize the consideration of various mechanical systems. The cumbersome and time-consuming operations associated with composing and solving differential equations have been replaced by simple algebraic transformations. The method is based on the mechanical analogue of Ohm’s law in a complex representation and the concept of mechanical reactance, resistance, impedance, susseptance, conductance and admittance. Resonances and antiresonances of forces and velocities are determined. Resonances occur when the elements are connected in parallel with a force source, or when the elements are connected in series with a velocity source. Antiresonances occur when a parallel connection and a speed source are combined, or a serial connection and a force source are combined. These concepts are a generalization to mechanics of the concepts of «voltage source» and «current source» from theoretical electrical engineering. The closest to the source of speed in its properties is a crank-rocker (connecting rod) mechanism with a massive flywheel. The source of force corresponds more to the rod of the significantly smaller of the two connected pneumatic cylinders.

scholarly journals Study of Excitation Characteristics of Traction Machine/Drive Systems

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 151
Author(s):  
Wenying Jiang ◽  
Qiqi Guo ◽  
Zhen Zhang
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Current Source ◽  
Computation Time ◽  
Voltage Source ◽  
Permanent Magnet Synchronous Machines ◽  
Current Harmonics ◽  
Influence Model ◽  
Machine Drive ◽  
Drive Systems

In order to accurately evaluate the performance of a traction machine/drive system, it is necessary to have an accurate excitation source which considers current harmonics. In this paper, four machine/drive systems with different excitation sources have been modeled, simulated, and studied to evaluate the effects on permanent magnet synchronous machines (PMSMs) from different perspectives. In Model I, the excitation is an ideal sinusoidal current source with no harmonics. Model II is excited by an ideal sinusoidal voltage source regardless of the pulse width modification’s (PWM’s) influence. Model III takes into account the influence of current harmonics under space vector pulse width modulation (SVPWM) control. Model IV is based on the equivalent circuit extraction (ECE) model (a look-up table motor model). We simulate these four models and study the characteristics of the excitation sources, based on the observations of current harmonics, torque, electromagnetic force, computation time, and efficiency. Experiments are also conducted to show that Model III allows the most precise study of the considered system. Model IV is a good substitution, providing similar results with a shorter running time.

Analysis and Experimental Validation of Performance of Z-Source Inverter-Fed Permanent Magnet Brushless DC Motor Drive

2011 ◽  
Vol 383-390 ◽  
pp. 7063-7068 ◽  
Author(s):  
Jian Shang ◽  
Zhi Zhen Liu ◽  
Yan Zhang
Keyword(s):  
Permanent Magnet ◽  
Current Source ◽  
Dc Motor ◽  
Drive System ◽  
Voltage Source ◽  
Brushless Dc Motor ◽  
Motor Drive ◽  
Brushless Dc ◽  
Permanent Magnet Brushless Dc ◽  
Motor Drive System

The Z-source inverter has overcome the limitation of the conventional voltage source inverter and current source inverter and provides a new option for motor drive system. The Z-source inverter has the unique ability of boosting the voltage of the dc source, which has advantages in the motor drive system for electric vehicles where the voltage of the onboard battery is usually lower. Firstly, this paper analyses the speed characteristic of permanent magnet brushless dc motor. Then operation principles and the control method are described and an effective and convenient strategy for generating PWM pluses with shoot-through states based on TMS320F2812 DSP is introduced. At last, the results of this experiment are presented and verify the correctness of the model.

Overlap‐time compensation technique for current‐source power inverter

2020 ◽  
Vol 13 (4) ◽  
pp. 854-862
Author(s):  
Suroso ◽  
Winasis ◽  
Toshihiko Noguchi
Keyword(s):  
Current Source ◽  
Source Power ◽  
Compensation Technique
Sign in / Sign up

Export Citation Format

Share Document