In many applications, it is important for an inverter to be lightweight and of a relatively small size. This can be achieved by using a High-Frequency Inverter that involves an isolated DC-DC stage (Voltage Fed Push-Pull/Full Bridge) and the DC-AC section, which provides the AC output.
Through the modulation of the width of the voltage pulses, the desired AC waveforms in high-voltage inverters can be approximated for an efficient and smooth power flow to the loads. The shape of the carrier waveform distinguishes different PWM techniques compared to the reference signal.
In the generation of PWM signals, high-frequency triangular carrier waveform is compared with sinusoidal waveform, in which the points of intersection of the two signals are used to determine the switching instance. One of the major aspects that directly impacts the resultant PWM output is the switching frequency of the triangular carrier.
The multi-level inverter of n levels would use n-1 carriers. For example, 12 carrier waves would be used with the present 13-level inverter. This approach works excellently when the carrier frequency is much higher than the modulation frequency, e.g., about fifty to one hundred times higher.
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High-frequency injection (HFI) is widely adopted for the sensorless control of permanent magnet synchronous motors (PMSMs) at low speeds. However, conventional HFI strategies relying on fixed …
Customer ServiceHigh-frequency injection (HFI) is widely adopted for the sensorless control of permanent magnet synchronous motors (PMSMs) at low speeds. However, conventional HFI …
Customer ServiceBy integrating three improved PWM techniques, the method mitigated narrow pulse issues at low modulation indices, ensured synchronized modulation at various carrier ratios, …
Customer ServiceTo improve the dynamic performance, reference [17] proposed the PUVI method, in which the HF square-wave injected into the estimated d-axis and increased the frequency of …
Customer ServiceWe are converting DC to AC (Square wave) with the help of switching device like MOSFET and then again converting it into DC by the process of rectification by high frequency …
Customer ServiceABSTRACT The High-Frequency Inverter is mainly used today in uninterruptible power supply systems, AC motor drives, induction heating and renewable energy source …
Customer ServiceHere, a multi-carrier pulse-width modulation (PWM) approach is introduced as a convenient way to implement a high-frequency link inverter.
Customer ServiceThis article explores the potential of carrier-based pulse width modulation techniques such as sawtooth, triangular, and sinusoidal, and examines how they directly impact harmonic distortion in high-voltage …
Customer ServiceThe multi-level inverter of n levels would use n-1 carriers. For example, 12 carrier waves would be used with the present 13-level inverter. This approach works excellently when …
Customer ServiceHere, a multi-carrier pulse-width modulation (PWM) approach is introduced as a convenient way to implement a high-frequency link inverter. The approach is a direct extension of conventional …
Customer ServiceThis article explores the potential of carrier-based pulse width modulation techniques such as sawtooth, triangular, and sinusoidal, and examines how they directly …
Customer ServiceA PWM technique with the frequency modulation of the carrier wave synchronized with the modulating wave was simulated and implemented in a CHB multilevel inverter.
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