Description
Lenze MDSKSRS071-03 | 2.0 kW Servo Motor
Product Introduction
The Lenze MDSKSRS071-03 is an MDSKS-series synchronous servo motor intended for closed-loop industrial motion systems. It uses resolver feedback, natural ventilation, and a 071 frame configuration. Lenze’s PositionServo documentation specifically lists this model under the MDSKS071-03 family and identifies the RS version as the no-brake configuration.
The electrical operating point is 2.0 kW at 330 VAC and 4.2 A, with a rated speed of 3,400 RPM and rated torque of 5.7 Nm. The documented maximum current is 19 A. One technical nameplate record additionally identifies 170 Hz operation, IP54 protection, Class F insulation, KTY thermal sensing, and a resolver designation.
MDSKSRS071-03
Key Technical Specifications
- Manufacturer: Lenze
- Model: MDSKSRS071-03
- Product Family: MDSKS
- Motor Type: Synchronous servo motor
- Rated Power: 2.0 kW
- Rated Voltage: 330 VAC
- Rated Current: 4.2 A
- Maximum Current: 19 A
- Rated Speed: 3,400 RPM
- Rated Torque: 5.7 Nm
- Operating Frequency: 170 Hz
- Feedback: Resolver
- Cooling: Natural ventilation
- Brake: No brake
- Insulation Class: F
- Protection Rating: IP54
- Temperature Sensor: KTY identified in the documented nameplate data
- Frame: 071
- Configuration: MDSKSRS071-03
The 2.0 kW, 330 V, 4.2 A, 3,400 RPM and 5.7 Nm values are independently repeated across current industrial records.
Application Scenarios & Pain Points
Legacy Lenze Motion Systems
The MDSKSRS071-03 is relevant when maintaining older Lenze motion equipment where the installed servo motor is no longer readily available through normal machine-OEM channels.
For these systems, matching the complete motor designation is more reliable than selecting another motor simply because it shares the 071 frame.
PositionServo Applications
Lenze’s PositionServo documentation lists MDSKSRS071-03 with compatible PositionServo drive configurations and 400–480 VAC three-phase drive input architecture. The documentation pairs the no-brake motor with E94R040T4NRM-class drive hardware.
Precision Machine Motion
The resolver feedback provides the feedback path required for closed-loop control. This makes the motor fundamentally different from a basic three-phase induction motor even though both use AC power.
Brownfield Replacement
A common maintenance problem is finding a motor that fits mechanically but has a different feedback or brake configuration.
The is specifically documented as the no-brake configuration, so a brake-equipped MDSKSBR071-03 should not be treated as an automatic substitute.
QA & Live Testing SOP
Step 1 — Nameplate Verification
Record the complete nameplate designation before energization.
Verify:
- Lenze identification
- 2.0 kW
- 330 VAC
- 4.2 A
- 3,400 RPM
- Resolver identification
- No-brake configuration
- KTY temperature-sensor identification where present
Step 2 — Mechanical Inspection
Inspect the shaft, flange, bearings, housing, connector, resolver interface, and cooling surfaces.
Check for:
- Shaft impact
- Bearing roughness
- Excessive radial or axial play
- Corrosion
- Connector damage
- Oil or grease contamination
- Housing cracks
Because this model uses natural ventilation, make sure the cooling ribs are not obstructed by accumulated contamination.
Step 3 — Resolver Test
Verify resolver wiring and insulation before connecting the motor to the drive.
Confirm that the compatible drive recognizes the feedback correctly and reports a stable position/speed signal.
A motor that spins but produces unstable resolver feedback should not pass acceptance testing.
Step 4 — Controlled Drive Startup
Use the compatible Lenze drive and the correct motor parameters.
Start at low speed and confirm:
- Resolver initialization
- Correct rotational direction
- Stable feedback
- No drive fault
- Normal phase current
- No abnormal mechanical noise
Step 5 — Dynamic Test
Increase speed progressively while monitoring:
- Motor current
- Feedback stability
- Vibration
- Bearing noise
- Temperature
- Drive diagnostics
- Acceleration/deceleration behavior
The 3,400 RPM rating should not be treated as a command to immediately run the motor at full speed during acceptance testing.
Step 6 — Packaging
Protect the shaft and resolver connector against impact. Use appropriate ESD handling around feedback connections and prevent the motor shaft from supporting packaging loads.
Field Engineer’s Pitfall Guide
❗ Do not substitute the brake version without checking the complete configuration.
Lenze documentation distinguishes MDSKSBR071-03 as the brake version and as the no-brake version.
❗ Do not confuse the resolver with an encoder.
he is documented with resolver feedback. The drive, feedback cable, and commissioning parameters must support that feedback system.
❗ Do not size the replacement by the 071 frame number alone.
MDSKS motors with the same basic frame designation can have different power, speed, torque, and configuration codes. te designation should be matched before approving a replacement.
Intent-Driven FAQ
Q1. What ze ?
It is a Lenze MDSKS synchronous AC servo motor with resolver feedback and natural ventilation.
Q2. What is the rated power?
The documented rated power is 2.0 kW.
Q3. What are the voltage and current ratings?
The documented ratings are 330 VAC and 4.2 A, with a listed maximum current of 19 A.
Q4. What is the rated speed and torque?
The rated speed is 3,400 RPM, with a rated torque of 5.7 Nm.
es have a brake?
No. Lenze’s PositionServo documentation identifies as the no-brake configuration.
Q6. What feedback does it use?
The motor uses resolver feedback.
he still a current production motor?
Current industrial records treat the model as legacy/obsolete hardware. For replacement procurement, verify the exact nameplate and physical condition rather than assuming new-production availability.
Procurement Note
For legacy Lenze equipment, use the complete identifier . Do not approve a substitute based only on “MDSKS 071-03.” The RS suffix corresponds to the no-brake configuration, and the feedback system is resolver-based.
