Método De Control De Los Igbt - Hitachi SJ2002 Serie Manual De Instruccion

Método de Control de los IGBT
El siguiente procedimiento controlará los transistores (IGBTs) y diodos:
1. Desconectar los terminales de entrada [R, S y T] y los del motor [U, V y W].
2. Desconectar los cables de los terminales [+] y [RB] de frenado regenerativo.
3. Usar un voltímetro digital (DVM) y ajustar el rango de 1Ω. Se puede controlar el
estado de cada terminal [R, S, T, U, V, W, RB, + y –] del inverter.
D1
[R]
[S]
[T]
D4
Tabla Lectura – Resistencia casi infinita: ≅ ∞ Ω Resistencia casi cero: ≅ 0 Ω
DVM
Parte
+
D1 [R]
+1
D2 [S]
+1
D3 [T]
+1
D4 [R]
[N]
NOTA: El valor de resistencia de los diodos o de los transistores no será exactamente el
mismo, pero sí, cercanos. Si se encuentran diferencia grandes, existe un problema.
NOTE: Before measuring the voltage between [+] and [–] with the DC current range,
confirm that the smoothing capacitor is discharged fully, then execute the tests.
[+1] [+] [RB]
D2 D3
+
TR7
D5 D6
[–]
Valor
Parte
medido
–
≅ ∞ Ω
+1 D5
≅ 0 Ω
[R]
≅ ∞ Ω
+1 D6
≅ 0 Ω
[S]
≅ ∞ Ω
+1 TR1
≅ 0 Ω
[T]
≅ 0 Ω
[N] TR2
≅ ∞ Ω
[R]
TR3 [W]
Inverter SJ200
TR1 TR2
TR4 TR5
DVM
Valor
Parte
medido
+ –
≅ 0 Ω
[S] [N] TR4
≅ ∞ Ω
[N] [S]
≅ 0 Ω
[T] [N] TR5
≅ ∞ Ω
[N] [T]
≅ ∞ Ω
[U] [+] TR6
≅ 0 Ω
[+] [U]
≅ ∞ Ω
[V] [+] TR7
≅ 0 Ω
[+] [V]
≅ ∞ Ω
[+]
≅ 0 Ω
[+] [W]
6–15
2
TR3
[U]
[V]
[W]
TR6
DVM
Valor
medido
+ –
≅ 0 Ω
[U] [–]
≅ ∞ Ω
[–] [U]
≅ 0 Ω
[V] [–]
≅ ∞ Ω
[–] [V]
≅ 0 Ω
[W] [–]
≅ ∞ Ω
[–] [W]
≅ 0 Ω
[RB] [+]
≅ ∞ Ω
[+] [RB]
≅ 0 Ω
[RB] [–]
≅ 0 Ω
[–] [RB]