Scope of this technical record
Circuit-path explanation for EDS1000-2S0015 A3140 driver channels and H20R120 output stage.
This record does not authorize live repair. Isolate input power, verify DC-link discharge and use controlled bench procedures appropriate to hazardous industrial drive electronics.
Six motor-output switching channels
The DB1 map identifies six A3140 driver paths feeding six H20R120 switching devices arranged as the U, V and W inverter output stage. This provides a phase-leg diagnostic framework: each channel belongs to a comparable high- or low-side switching role, and abnormality in one branch may be compared with its corresponding paths rather than judged in isolation.
Gate-drive evidence is especially important after a power-module failure. An IGBT can fail because of the load or DC link, but it can also be destroyed by missing turn-off control, incorrect drive supply or collateral damage in the channel connected to its gate.
Separate braking from motor output
The drawing also shows an A3140/G7 branch associated with a braking-related IGBT reference. The database records that separately because a fault in the braking route is not automatically a failure of the six U/V/W switching channels. This separation reduces false board conclusions when a technician observes one abnormal branch.
Gate-drive assessment logic
| Path | Associated function | Repair consequence |
|---|---|---|
| G1–G6 | Three-phase inverter switching | Prove before replacing output devices |
| H20R120 × 6 | Power semiconductor stage | Do not energise with suspected driver damage |
| G7 / brake branch | Braking function boundary | Investigate separately from motor output |
| Isolated supplies | Driver operating environment | Supply symmetry is part of the evidence |
Safe use of the map
This map is an interpretive aid for qualified personnel. It supports a no-output inquiry and a controlled pre-power decision; it is not a method for injecting pulses into a connected high-energy inverter or forcing operation around protection.
Field record checklist
- Capture exact model and board identifiers
- Record symptom timing and previous destructive events
- Preserve rail, connector and component evidence before substitution
Technical basis and reference documents
This is an independent editorial technical reference. Original manufacturer documentation remains controlling for installation, repair and commissioning decisions.
Establishes EDS1000 family identity, rating context and user-level fault/commissioning framework.
Board-level functional mapping derived from reviewed DB1 and DB2 circuit sheets; original drawing is not redistributed on the public site.
Confirms manufacturer/model identity, 1-phase 220 V / 7.5 A listing context, discontinued status and repair-channel presence.