Project | Medium frequency power supply type | |||
(a) Parallel type | (b) tandem type | (c) series and parallel | ||
Output voltage waveform | Sine wave | Rectangular wave | Sine wave | |
Output current waveform | Rectangular wave | Sine wave | Sine wave | |
Induction loop fundamental voltage | Inverter output voltage | Q× inverter output voltage | Inverter output voltage | |
Induction loop fundamental current | Q× inverter output current | Inverter output current | Q× inverter output current | |
DC filter | Large reactance | Large capacitance | Large capacitance | |
Anti-parallel diode | No need to | use | use | |
Thyristor | Du/dt | small | Big | small |
Di/dt | Big | small | general | |
Commutation overlap effect | Series reactance and distributed inductance cause commutation overlap | no | no | |
Commutation failure protection | easily | difficult | difficult | |
Additional component | less | general | many | |
Exchange efficiency | High (about 95%) | Normal (about 90%) | Low (about 86%) | |
Operational stability | Stable over a wide range | Poor adaptability to load changes | Difficult to manufacture below 1000HZ | |
energy saving effect | good | general | difference | |
