DC Drive
and Thyristor Rectifier Repair
Siemens Simoreg · ABB DCS · Eurotherm 590+ · Control Techniques Mentor · Indramat
DC drives control DC motors in rolling mills, winders and drawing machines. A thyristor or control board failure stops the line. We repair rectifier bridges, field excitation circuits and regulation boards with a 12-month warranty.
Diagnostics included in repair
No-obligation quote
12-month warranty
Courier pickup from all of Europe
Post-repair testing
DC drive service — full range of repairs
Thyristor bridges
SCR thyristor, diode rectifier and IGBT module replacement in 4Q systems. Overcurrent and short-circuit fault elimination.
Filter capacitors
DC-link capacitor section and LC filter regeneration, electrolytic replacement after ESR increase.
Control boards
Control board (CPU, DSP) repair, armature current and field excitation regulation circuits.
Communication interfaces
Profibus, Profinet, Modbus RTU/TCP port repair. DCS/PLC communication restoration.
Field excitation circuits
DC motor field excitation module service, field current regulation and field protection adjustment.
Fans and cooling
Fan replacement, heatsink cleaning, thermal compound replacement.
DC drive repair at EFIXLAB: power electronics specialization
- EOL device repair — we repair discontinued DC drives — Simoreg 6RA70, Eurotherm 590+, Mentor MP.
- Load testing — every drive is tested after repair on a bench with a DC motor.
- Original components — Semikron, Infineon thyristors; Epcos, Nichicon capacitors.
- Parameterization — DriveMonitor, DWL, EPM parameter backup and restore.
- Fast turnaround — diagnostics up to 5 business days, repair 5–7 business days (after receiving necessary components). As a rule — time may be extended depending on component availability and repair complexity; deadlines agreed individually.
- 12-month warranty — on all work performed.
DC drive repair: 6 steps to a working device
Request
online or by phone
Ship
by courier
Diagnostics
included in repair
Quote
& approval
Repair
& testing
Return
with warranty
Request DC drive repair — no-obligation quote
Provide the DC drive model, power rating and fault description. We will get back with a quote and timeline.
Dziękujemy! We have received your request — we will get back to you shortly with a quote and timeline.Frequently asked questions
Repair cost is typically 20–60% of the price of a new device. We send the quote within 24h.
Diagnostics: up to 5 business days. Repair: 5–7 business days after quote approval and receiving necessary components. As a rule — repair time may be significantly extended depending on component availability and repair complexity. Deadlines are agreed individually with the client.
Yes — that is one of our specialties. We have the components and experience with this platform.
After submitting an online request, ship the device by courier to our Warsaw address.
