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Chapter3. Specification and Operation
hapter3. Specification and Operation
hapter3. Specification and Operation
hapter3. Specification and Operation
N5000 INSTRUCTION MANUAL
N5000 INSTRUCTION MANUAL
N5000 INSTRUCTION MANUAL
N5000 INSTRUCTION MANUAL
Figure 3-8 Power cell structure
640V from transformer is raised up to 850V in rectification part of power cell. And power cell is
modulated to generate 635V/577V for the inverter final 6600V/6000V output because 6 power cell
outputs are serially connected for each phase in 6kV-class inverter. (Each power cell output of
3kV-class has the same value with the 6kV-class because 3 power cells are serially connected for 1
phase in 3kV-class.) Power circuit connections for power cell unit use busplates and busbars to
minimize parasitic inductance effect. Inverter circuit of the power cell inverts DC voltage to single
phase AC voltage and implements PWM for output voltage using on/off controllable IGBT.
3.3.3 Inverter Output
Maximum size of output voltage of each power cell unit is 635V. In the 6kV-class N5000 inverter,
six 635V units are serially connected to achieve 3810V and the 3810V units generate 6600 line
voltage using Y-connection as shown in figure 3-9.
※
Inside value of ( ) is the voltage when considering maximum N5000 inverter output as 6000V.
Figure 3-9 Voltage outputs of multilevel H-bridge inverter power cell output
Max phase voltage
Vu=3.810V(3,462V)
Max line voltage
Vuv=6,600V(6,000V)
Serial connection of
6 cell unit output
Each cell unit
max voltage
