SJ200 Inverter
T
roub
leshoot
ing
and Maintenance
6–15
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 [RB] for regenerative braking.
3.
Use a Digital Volt Meter (DVM) and set it for 1
Ω
resistance range. You can check the
status of the charging state of terminals [R, S, T, U, V, W, RB, +, 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
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.
Part
DVM
Measured
Value
Part
DVM
Measured
Value
Part
DVM
Measured
Value
+
–
+
–
+
–
D1
[R]
+1
≅ ∞ Ω
D5
[S]
[N]
≅
0
Ω
TR4
[U]
[–]
≅
0
Ω
+1
[R]
≅
0
Ω
[N]
[S]
≅ ∞ Ω
[–]
[U]
≅ ∞ Ω
D2
[S]
+1
≅ ∞ Ω
D6
[T]
[N]
≅
0
Ω
TR5
[V]
[–]
≅
0
Ω
+1
[S]
≅
0
Ω
[N]
[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]
[N]
≅
0
Ω
TR2
[V]
[+]
≅ ∞ Ω
TR7
[RB]
[+]
≅
0
Ω
[N]
[R]
≅ ∞ Ω
[+]
[V]
≅
0
Ω
[+]
[RB]
≅ ∞ Ω
TR3
[W]
[+]
≅ ∞ Ω
[RB]
[–]
≅
0
Ω
[+]
[W]
≅
0
Ω
[–]
[RB]
≅
0
Ω
[R]
[S]
[T]
TR1
TR2
TR3
[U]
[V]
[W]
[–]
D1
D2
D3
D4
D5
D6
+
[+] [RB]
[+1]
TR4
TR5
TR6
TR7
Summary of Contents for SJ200 Series
Page 49: ...4 15 Remove the housing housing ...
Page 54: ...5 5 5 1 構造図 5 11 ...
Page 55: ...5 6 5 1 構造図 6 11 ...
Page 56: ...5 7 5 1 構造図 7 11 ...
Page 57: ...5 8 5 1 構造図 8 11 ...
Page 58: ...5 9 5 1 構造図 9 11 ...
Page 59: ...5 10 5 1 構造図 10 11 ...
Page 60: ...5 11 5 1 構造図 11 11 ...
Page 61: ...SJ200 002 004 005NFEF Slide type ...
Page 62: ...SJ200 007 011NFEF 004 007HFEF Slide type ...
Page 63: ...SJ200 015 022NFEF 015 040HFEF Slide type ...
Page 64: ...SJ200 055 075HFEF Slide type ...