inverter power Articles
-
An adaptive hysteresis dead-band-based SVPWM method for multi-level inverter
The fast rise time of output voltage pulses (dv/dt) in PWM multi-level inverters (MLI) is one of the major factors of the increase of electromagnetic interference EMI and the shortness of motor useful life. Moreover, irregular voltage pulses, which only appear for critical modulation indexes, can deepen this interference phenomenon. To overcome this problem, this paper proposes an adaptive ...
-
Power Inverter Basics
Basic knowledge of power inverter Power inverter mainly adopts the PWM at present, controller switch to DC rapidly in a pulse-period to ensure that the DC integral value is equal to the sampling values of AC sine wave at the same time. After filtered, more than 96% sine wave output can be realized. Pulse inverter is self-excited inverter that output voltage is pulse modulation. This kind of ...
By GoHz Inc
-
Design and digital implementation of non-iterative controller for improved performance of typical BLDC servo systems
BLDC motors find numerous applications in the position and speed control systems. Such motors are not able to meet the desired specifications since they respond slowly to the input owing to inherent parameters. Hence, a feasible and practically realisable controller is required to meet the desired specifications with improved performance. The proposed simple controller is implemented using a ...
-
Improved space vector PWM algorithm for three–level voltage source inverter in overmodulation region
In high power high performance AC drive industrial applications, multilevel inverters have established their importance, as they can synthesise output waveform with improved harmonic spectrum. In this paper, an improved synchronisation and symmetrical SVPWM algorithm is proposed for three–level inverter in overmodulation region for better utilisation of DC bus and to reduce harmonic distortion. ...
-
Programmed PWM to improve power quality in systems with distributed generation units
Pulse-Width Modulated (PWM) inverters are widely applied in Distributed Generation (DG) units and power quality equipment owing to their excellent performance and flexible control means. Programmed PWM (PPWM), as a special type of optimal PWM strategy, theoretically allows for setting the fundamental and the selected harmonic amplitudes directly to arbitrary values. The algorithms for solving ...
-
A novel invariable carrier frequency multi–level inverter PWM for balancing switching transitions and better distribution of harmonic power
The number of switching per modulation cycle at each level in a multi–level inverter depends on the carrier frequency and the duration that the reference waveform dwells within the level. The variable carrier frequency band (VFCB) approach creates as many clusters as the number of carrier frequencies and consequent deterioration of the harmonic spectrum. Therefore, a new pulse width modulation ...
-
SiC Mosfets with Schottky power diodes help optimise the design of multi–functional arc welding equipment in popular power range
Logistics, welder's comfort, productivity and quality need of weld joint and jobs in hand at site etc., together decide the required arc (constant current (CC) or constant voltage (CV) or their combination) characteristics. Multi–functional arc welding equipment meets such needs. High across the load efficiency, fast settling time of output variables and light and compactness are major ...
-
Difference between Inverter & UPS? | Orrofast
What is UPS? An Uninterruptible Power Supply (UPS) is a device that allows an Electronic Devices to keep running for at least a short period of time when incoming power is interrupted. As long as utility power is flowing, it also replaces and maintains the energy storage. (Uninterruptible Power Supply) A device that provides battery backup when the electrical power fails or drops to an ...
By Orrofast
-
Analysis and design of controlled capacitor charging type power frequency inverter
This paper presents the performance of the capacitor charging type inverters. The inverter uses the voltage and current feedback and produces a desired voltage at the output by suitably charging/discharging a capacitor. An inductor is connected in series to limit the charging/discharging current. Both single and three phase inverters are considered. A small signal analysis is presented to ...
-
Instantaneous voltage measurement technique for PWM voltage source inverters
The pulse width modulated (PWM) voltage source inverter (VSI) is almost universally used in industrial motor drives. Although measurement of the VSI output voltage is required in many applications, accurate measurement is problematic due to the high frequency inverter switching. Many commonly used inverter output voltage measurement methods, such as indirect and direct voltage measurement, ...
-
Regenerative snubber for UPS inverter
An uninterrupted power supply (UPS) is used to provide electrical power to a load during an emergency situation in which the main utility power is not available. UPS topologies are well known. The inverter plays the most important role as an element in the UPS system. Usually, pulse width modulated inverters with voltage control and waveform shaping are used in UPS. This paper proposes an ...
-
Performance of grid connected inverter with maximum power point tracker and power factor control
Detailed analysis, simulation and hardware results of grid connected inverter with maximum power point tracker and power factor control in Malaysian climate are presented. A six-switch topology inverter with symmetrical pulse width modulation (PWM) switching technique is used. A low-pass filter is incorporated in the circuit to filter out unwanted harmonics and produce a sinusoidal AC current. ...
-
Power factor improvement using active filter for unbalanced three-phase non-linear loads
In this paper, a modified shunt active filter is used under unbalanced three-wire supply voltages with non-linear loads. The main objective of the proposed shunt active filter is to control the three-phase supply currents both in its waveform, magnitude and phase to follow three-phase reference signals. The reference signals are derived from one of the phase voltages. When this is achieved, ...
-
Performance evaluation of CSI-based unified power quality conditioner using artificial neural network
In recent years unified power quality conditioner (UPQC) is being used as a universal active power conditioning device to mitigate both current as well as voltage harmonics at a distribution end of power system network. The performance of UPQC mainly depends upon how quickly and accurately compensation signals are derived. The artificial neural network (ANN) trained with conventional compensator ...
-
Brushless Motor
Brushless DC electric motor (BLDC motors, BL motors) also known as electronically commutated motors (ECMs, EC motors), or synchronous DC motors, are sensored brushless motor powered by DC electricity via an inverter or switching power supply which produces an AC electric current to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor ...
-
Modelling of DSTATCOM for distribution system
This paper deals with the simulation of distribution static synchronous compensator (DSTATCOM) for improving power quality of a distribution system feeding linear as well as non-linear loads. Nowadays, there are an increasing number of non-linear loads which inject harmonics into the system. A three-phase insulated gate bipolar transistor- (IGBT-)based current controlled voltage source inverter ...
-
Classification and comparison of interfacing schemes for connecting fuel cells to a single-phase utility line
Based on a systematic classification of dc source to utility interfacing schemes, this paper presents six major interfacing schemes for connecting fuel cells to a single-phase utility line using high-frequency transformer isolated power converters. The operation, advantages and disadvantages are discussed for each scheme with examples and operating waveforms. Several features e.g., utility line ...
-
Vector control of current regulated inverter connected to grid for wind energy applications
Connecting variable speed wind turbine connected to the grid requires a proper control of the inverter to improve the power quality for the system. The vector control of an inverter connected to the grid is presented. The proposed control technique implies a hysteresis current controller in the inner loop. The complete control system has been developed, analysed, and validated by simulation ...
-
Electric Powertrain Measurement on Hydrofoil - Case Study
Quadrofoil, Slovenia The Quadrofoil Q2 has been characterized as an “ecologically-sound electric hydrofoil sports car for the water”. For a complex product such as this, it is necessary to continuously carry out extensive measurement procedures with test equipment. Dewesoft has helped Quadrofoil in measuring the performance of the electric powertrain of their prototype hydrofoil ...
By DEWESoft
-
The Benefits of Micro Inverters
The Benefits of Micro Inverters In the solar world, one of the big debates is the whole string inverter vs. micro inverter issue. Solar inverters are the devices that convert DC power being produced by the solar panel into AC power. The debate lies in which type of inverter is better, string or micro, which both have unique functions and compatibility. The Types of Inverters Inverters ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you