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Frequency Inverter Articles & Analysis
8 articles found
Low-Frequency DC / Low-Frequency Inverter Design What it means: “Low-frequency inverter” usually refers to a design where DC is converted to AC at the grid frequency (50/60 Hz) through a transformer operating at that same low frequency. In contrast, ...
The system is mainly composed of PLC, frequency inverter and P + F encoder, which with low cost, using the automatic positioning anti-sway control technology, under the conditions of the general industrial crane with a maximum design speed of normal operation, compared to the crane does not use anti-sway control technology, swinging amplitude with load reduction ...
Some of them are achieved if switching frequency of inverter is kept high. Constraint of efficiency at high switching frequency is, generally, overcome by adopting proper soft switching topology. This paper suggests that better design is possible for narrow power range arc welding equipment (3–20 kW) using traditional hard–switched ...
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 ...
It was concluded that due to the abundant harmonics in the PWM waveforms, significant losses are induced in the motor by the inverter supply. The temperature ascends correspondingly. Switching frequencies of the PWM inverter at 3.5 kHz to 9 kHz were investigated to evaluate their effect on the excessive losses. ...
This paper presents simulation and experimental discussions on conducted electromagnetic interference (EMI) emissions for a single-phase full-bridge sinusoidal pulse width modulated (SPWM) and hybrid pulse width modulated (HPWM) inverters. The influences of input dc link voltage, modulation depth and carrier frequency on the conducted noise are studied through ...
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 ...
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 ...