By using the time variant modulation ratio method, the harmonics can be eliminated and a sinusoidal and balanced output voltage or input current is obtained.
The output voltage waveforms of matrix converter which is based on the space vector modulation are analysed under the unbalanced input voltage. A time-variant modulation ratio method is proposed.
3
利用有源钳位电路实现主变压器铁心对称复位,功率开关在宽输入电压和宽负载电流范围内零电压开关。
By using an active clamp circuit, the power transformer core is symmetrically reset. Zero voltage switching conditions are achieved over a broad input voltage and output current range.