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Table 6-5 The fragile componments of 20kVA power board
Components
Tag Number
Specifications
Alternative
specification
Battery SCR
S1,S2,S3,S4,S5,S6,S7,S8,S9,S10,S11,
S12
VS-50TPS12L-M3
CLA50E1200HB
Battery
SCR
driver
module
PCB10,PCB11
Boost IGBT
Q1,Q2,Q3,Q4,Q5,Q6
IKW50N65H5
MM75G5U65BX
Inverter
outer
bridge
IGBT
Q7,Q8,Q11,Q12,Q15,Q16
IKW40N120CS6
MM40G3U120BX
Inverter
inner
bridge
IGBT
Q9,Q10,Q13,Q14,Q17,Q18
IKW30N65EL5
JT050N065WED
IGBT driver module
PCB1,PCB2,PCB3,PCB4,PCB5,PCB
6,PCB7,PCB8,PCB9
Zenner diode of IGBT
driver
ZD6,ZD7,ZD8,ZD9,ZD10,ZD11,
ZD12,ZD13,ZD14,ZD15,ZD16,
ZD17,ZD18,ZD19,ZD20,ZD21,
ZD22,ZD23,ZD24,ZD25,ZD26,
ZD27,ZD28,ZD29,ZD30,ZD31,
ZD32,ZD33,ZD34,ZD35,ZD36,
ZD37,ZD38,ZD39,ZD40,ZD41
ZMM18
Boost diode
D1,D2,D3,D4,D5,D6
APT75DQ60BG
MM75FU60B
Fig.6-5 Key components identification of 20kVA power board
The detailed maintenance steps are as follows:
Step 1: Check whether the copper foil is corroded and rusted on the whole power board. You can use a
multimeter to assist in the inspection. If there is corrosion, the copper foil needs to be re-soldered.
Step 2: Visually inspect the entire power board for obvious burns or cracks, and replace if necessary.
