The sinusoidally PWM inverter

2011 ◽  
pp. 235-244
Keyword(s):  
Pwm Inverter

High-Carrier-Frequency Iron-Loss Characteristics Excited by GaN FET Single-Phase PWM Inverter

2016 ◽  
Vol 136 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Takahiro Tanaka ◽  
Shoko Koga ◽  
Ryosuke Kogi ◽  
Shunya Odawara ◽  
Keisuke Fujisaki
Keyword(s):  
Carrier Frequency ◽  
Single Phase ◽  
Iron Loss ◽  
Pwm Inverter ◽  
High Carrier ◽  
Gan Fet

scholarly journals Sensorless LC Filter Implementation for Permanent Magnet Machine Drive Using Observer-Based Voltage and Current Estimation

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3596
Author(s):  
Chia-Ming Liang ◽  
Yi-Jen Lin ◽  
Jyun-You Chen ◽  
Guan-Ren Chen ◽  
Shih-Chin Yang
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Pulse Width Modulation ◽  
Output Current ◽  
Current Harmonics ◽  
Pwm Inverter ◽  
Current Estimation ◽  
Filter Output ◽  
Lc Filter ◽  
Parameter Error

For pulse width modulation (PWM) inverter drives, an LC filter can cascade to a permanent magnet (PM) machine at inverter output to reduce PWM-reflected current harmonics. Because the LC filter causes resonance, the filter output current and voltage are required for the sensorless field-oriented control (FOC) drive. However, existing sensors and inverters are typically integrated inside commercial closed-form drives; it is not possible for these drives to obtain additional filter output signals. To resolve this integration issue, this paper proposes a sensorless LC filter state estimation using only the drive inside current sensors. The design principle of the LC filter is first introduced to remove PWM current harmonics. A dual-observer is then proposed to estimate the filter output current and voltage for the sensorless FOC drive. Compared to conventional model-based estimation, the proposed dual-observer demonstrates robust estimation performance under parameter error. The capacitor parameter error shows a negligible influence on the proposed observer estimation. The filter inductance error only affects the capacitor current estimation at high speed. The performance of the sensorless FOC drive using the proposed dual-observer is comparable to the same drive using external sensors for filter voltage and current measurement. All experiments are verified by a PM machine with only 130 μH phase inductance.

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