6
17
IGBT Test Method
The following procedure will check the inverter transistors (IGBTs) and diodes:
1. Disconnect input power to terminals [R, S, and T] and motor terminals [U, V, and
W].
2. Disconnect any wires from terminals [+] and [–] for regenerative braking.
3. Use a Digital Volt Meter (DVM) and set it for 1Ω resistance range. You can check the
status of the charging state of terminals [R, S, T, U, V, W, +, and –] of the inverter
and the probe of the DVM by measuring the charging state.
Table Legend Almost infinite resistance:
∞ Ω Almost zero resistance:
0 Ω
Part
DVM
Measured
Value
Part
DVM Measured
Value
Part DVM Measured
Value
–
+
–
+
– +
D1
[R] [+1]
∞ Ω
D5 [S] [–]
0 Ω
TR4 [U] [–]
0 Ω
[+1] [R]
0 Ω
[–] [S]
∞ Ω
[–] [U]
∞ Ω
D2
[S] [+1]
∞ Ω
D6 [T] [–]
0 Ω
TR5 [V] [–]
0 Ω
[+1] [S]
0 Ω
[–] [T]
∞ Ω
[–] [V]
∞ Ω
D3
[T] [+1]
∞ Ω
TR1 [U] [+]
∞ Ω
TR6 [W] [–]
0 Ω
[+1] [T]
0 Ω
[+] [U]
0 Ω
[–] [W]
∞ Ω
D4
[R] [–]
0 Ω
TR2 [V] [+]
∞ Ω
TR7 [RB] [+]
∞ Ω
[–] [R]
∞ Ω
[+] [V]
0 Ω
[+] [RB]
0 Ω
TR3 [W] [+]
∞ Ω
[RB] [–]
∞ Ω
[+] [W]
0 Ω
[–] [RB]
∞ Ω
NOTE: The resistance values for the diodes or the transistors will not be exactly the
same, but they will be close. If you find a significance difference, a problem may exist.
NOTE: Before measuring the voltage between [+] and [–] with the DC current range,
confirm that the smoothing capacitor is discharged fully, then execute the tests.
D1
[R/L1]
D2
D3
D4 D5
D6
[PD/+1] [P/+] [RB]
TR1
TR2
TR3
TR4
TR5
TR6
TR7
[U/T1]
+
[N/
-
]
[S/L2]
[T/L3]
[V/T2]
[W/T3]
Содержание WJ200-001L
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Страница 300: ...5 1 Inverter System Accessories In This Chapter page Introduction 2 Component Description 3 5 ...
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Страница 674: ...Index 1 Index Index page A B C 2 D E F G H 3 I J K L M 4 N O P 5 Q R S 6 T U V W X Y Z 7 Index ...