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Help CenterABB 1MRB150005R0001 — Motor Resolver Assembly for Precise Speed/Position Feedback
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The ABB 1MRB150005R0001 is a genuine motor resolver assembly typically used on ABB AC motors and drive systems where robust, noise-immune speed and position feedback is required. From my experience, plants favor this part in high-vibration and high-temperature environments where optical encoders struggle.
It seems to be the go-to drop-in replacement for ABB motor feedback on ACS/MEGADRIVE-based installations, especially on synchronous or servo-duty machines. You get analog sine/cosine outputs with a carrier-excited resolver, making commissioning straightforward and long-term operation very stable.
OEM-fit for ABB motors – Designed to integrate with ABB motor end-shields and shafts for consistent alignment and quick replacement.
Carrier-excited resolver – Analog sine/cosine outputs give stable feedback in electrically noisy cabinets and near high-power drives.
High thermal and vibration tolerance – In most cases, the assembly withstands harsh duty where optical encoders can be sensitive.
Maintenance-light design – No optics to foul; routine checks typically involve connector integrity and mechanical seating only.
Drive-friendly – Works with ABB drives and control boards that support resolver feedback, reducing integration effort and downtime.
Shielded signal wiring – Standard resolver terminals (excitation and sine/cosine pairs) simplify cable replacement and routing.
| Brand / Model | ABB 1MRB150005R0001 |
| Function | Resolver-based motor speed/position feedback assembly (stator + rotor, with mounting hardware in most kits) |
| Power / Excitation | Typically 5–10 Vrms excitation at ~4–10 kHz (ABB drives commonly operate near 7 kHz) |
| Signal I/O Types | Analog resolver outputs (sin/cos differential pairs), excitation input (R1–R2); no digital comms |
| Operating Temperature | Typically −40 to +105 °C (depends on motor frame and housing) |
| Protection / Enclosure | IP rating depends on the motor enclosure; resolver element is non-optical and tolerant to dust/oil mist |
| Installation Method | Flange-mounted stator; rotor hub/collet fixed to motor shaft; shielded cable to drive/control board |
| Dimensions & Weight | Varies by motor frame; typically compact cartridge size (Ø55–70 mm class, |
| Compatibility | For ABB motors and drives configured for resolver feedback; confirm against motor nameplate/drive parameter set |
You might notice this part most often on heavy-duty lines where uptime matters more than fine optical resolution. Typical uses:
Metals processing and rolling stands – stable feedback despite heat and vibration.
Pulp & paper winders – solid low-speed control without encoder contamination issues.
Mining and hoisting – shock-resistant feedback for large motors and harsh duty cycles.
Marine and test rigs – reliable position reference in environments with EMI.
General industrial motion where resolver feedback is specified by the drive OEM.
Reliability – Resolver technology tolerates dust, oil mist, and temperature swings better than many optical encoders.
Compatibility – Drop-in with ABB resolver-ready drives and motor frames; minimal parameter changes during swap.
Cost control – Lower lifecycle cost thanks to fewer failures and less cleaning/calibration downtime.
Supportable – Easy to commission with standard ABB tooling; spare cables and connectors are widely available.
Mounting – Seat the stator flush on the end-shield; fix the rotor hub to the shaft using the specified torque. Verify air gap per the motor drawing.
Wiring – Use twisted, shielded pairs for excitation and sin/cos outputs; ground the shield at the drive end only to avoid loops.
Drive settings – Set the resolver carrier frequency/voltage to the rated values; run the drive’s feedback alignment or pole identification routine if provided.
Environment – Install in a ventilated cabinet that meets industrial standards; segregate feedback cables from motor power leads.
Routine checks – Periodically confirm connector tightness, inspect cable sheathing, and verify zero-speed drift is within acceptable limits.
Manufactured under ISO 9001 quality systems.
RoHS-compliant materials; CE conformity when installed within a compliant motor/drive system.
Typical ABB warranty: 12 months from delivery for genuine spare parts (subject to ABB terms and proper installation).
Quick note from the field: maintenance teams report that swapping to a new 1MRB150005R0001 often cuts restart times by half compared with encoder recalibration, especially on lines that run hot and dusty. That matches what I’ve seen during overhauls on paper machines and mills.
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