Solid-state Superaudio Protection section
1.The equipment owns the phase sequence error protection, phase loss protection, insufficient hydraulic pressure protection, over-voltage protection, over-current protection, voltage limiting protection, current limiting protection, water temperature protection, drive undervoltage protection, high frequency protection, low frequency protection and machine interlock protection.
Imported capacitor is used for IGBT resistance capacitance absorption protection.
IGBT device uses the Germany Siemens importedFZ400R121KS4.
IGBT series diode uses Germany IXYS fast recovery diode.
2. The main inverter output uses bus bar. The bipolar clamping output greatly reduces the lead inductance.
3. IGBT drive pulse may use the drive board to adjust the duty cycle of the drive pulse to achieve the purpose of adjustment of the overlapping time. Besides, it may also adjust the phase of the diagonal trigger pulse to achieve complete overlapping.
4. Inverter bridge input front end is provided with special overvoltage protection, so as to limit the over-voltage. Meanwhile, the protective SCR is turned on to relieve the energy here instead of entry into the inverter bridge, thus protecting the IGBT module.
5. In the event of occurrence of any fault, the rectifying pulse is pushed to the inverter area, so that the energy in the energy storage element is fed back to the power grid.
