LTI MOTION LSC-130-3-20-560-A5B2R1PM0M AC Servo Motor – LSC Series

LSC-130-3-20-560-A5B2R1PM0M — Torque-Generating Node in a 560 V Closed-Loop Servo Axis

The LTI MOTION LSC-130-3-20-560-A5B2R1PM0M is a 130 mm frame-class AC permanent-magnet synchronous motor (PMSM) rated at 3 kW continuous shaft power with a 20 A RMS phase current ceiling and a 560 V DC bus interface. It belongs to LTI MOTION’s LSC (Linear Servo Compact) product family — a range engineered specifically for servo axes in which envelope constraints, thermal self-sufficiency, and encoder fidelity are primary design drivers. The part number encodes the full hardware configuration: 130 mm flange, 3 kW power class, 20 A current rating, 560 V bus voltage, 23-bit multi-turn absolute encoder (A5), spring-applied holding brake (B2), high-speed serial feedback interface (R1), smooth shaft with standard IEC flange (PM0M).

Within a servo axis control loop, this motor occupies the plant position: it converts the PWM-modulated phase voltages delivered by the paired LTI MOTION POSIDRIVE or POSIDYN servo drive into shaft torque and angular displacement. The drive closes three nested control loops — current (torque), velocity, and position — around the motor and its load. The 23-bit absolute encoder embedded in the A5 option provides the angular feedback signal for all three loops simultaneously, transmitting commutation angle, velocity estimate, and absolute multi-turn position to the drive over a single high-speed serial link. The spring-applied B2 brake holds the axis stationary whenever the drive is de-energized, without requiring a separate control command.

The 560 V DC bus voltage corresponds to the rectified and filtered output of a standard 400 V AC three-phase industrial supply — the dominant grid voltage in European and Asian manufacturing facilities. Operating at this bus level allows the motor’s stator winding to be designed for higher impedance per phase, which reduces the RMS phase current required to produce a given torque and lowers I²R copper losses relative to a 24 V or 48 V DC bus motor of equivalent power. The 20 A phase current rating is therefore the continuous thermal limit of the winding, not a drive output constraint, and the paired drive can deliver short-duration overload currents of 2–3× this value to produce peak torques for acceleration and deceleration transients.

The smooth shaft (PM0M) and 130 mm IEC flange conform to standard coupling bore and gearbox input shaft dimensions, allowing direct mechanical integration into existing machine designs. The IP65 body seal protects the stator and rotor assemblies against particulate ingress and low-pressure water jets, extending the motor’s deployment envelope to food processing, pharmaceutical packaging, and light wash-down environments without supplementary enclosure hardware.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

Stator Winding Architecture and Thermal Ceiling: The LSC-130 stator uses a distributed lap winding with a high copper slot-fill factor, achieved through precision-wound rectangular-section conductors and vacuum-pressure impregnation (VPI) of the complete stator assembly. VPI eliminates air voids between conductor strands and the slot liner, reducing inter-turn thermal resistance and allowing heat generated at the conductor surface to conduct efficiently to the stator lamination stack and then to the aluminum housing. The Class F insulation system sets the maximum winding temperature at 155 °C. Under natural convection cooling (IC410) at the rated 20 A continuous phase current and 40 °C ambient, the thermal design maintains a margin of approximately 30–40 °C below this limit, providing headroom for short-duration overload cycles without accelerating insulation degradation.

Rotor Magnet Geometry and Cogging Torque Suppression: The rotor assembly uses surface-mounted sintered NdFeB permanent magnets with a fractional pole-pitch skew applied across the axial length of each magnet segment. The skew angle is selected to cancel the dominant spatial harmonic of the cogging torque waveform — the periodic reluctance torque produced by the interaction between the rotor magnets and the stator slot openings. By distributing the magnet edges across a fractional slot pitch, the cogging torque contributions from individual slot-magnet pairs are phase-shifted and partially cancel in the aggregate. The result is a peak cogging torque below 1% of rated torque, which directly reduces the amplitude of the periodic velocity disturbance that the drive’s speed controller must reject at low shaft speeds — a parameter critical in contouring and surface-finish applications.

23-Bit Absolute Encoder (A5) — Signal Chain and Latency: The A5 encoder is a capacitive or optical absolute transducer with 23-bit single-turn angular resolution (8,388,608 positions per revolution) and multi-turn position tracking via an internal mechanical gear train and battery-backed revolution counter. The encoder communicates with the servo drive over a differential serial link compatible with the EnDat 2.2 protocol at clock rates up to 16 MHz. A complete position telegram — including single-turn angle, multi-turn count, encoder temperature, and error status — is transmitted and acknowledged within one communication cycle of approximately 10 µs. The differential signal pair is inherently immune to common-mode noise induced by the motor’s PWM switching transients on the power cable, eliminating the need for optocoupler isolation on the feedback path. Absolute position is available to the drive within the first communication cycle after power-on, removing the homing travel sequence from the machine startup routine.

B2 Holding Brake — Fail-Safe Engagement Logic: The B2 brake is a spring-applied, power-released (SAPR) electromagnetic device mounted at the non-drive end (NDE) of the motor. In the de-energized state, a pre-compressed spring pack clamps a friction disc against a stationary armature plate, generating a static holding torque dimensioned to arrest the motor’s rated torque output. Applying 24 V DC to the brake coil generates a magnetic flux that overcomes the spring force, retracts the armature plate, and releases the friction disc. This architecture guarantees brake engagement on any power loss event — including E-stop, drive fault, or supply interruption — without requiring a control signal from the drive or PLC. The engagement time (spring release to full clamping torque) is typically 20–50 ms, which must be accounted for in the drive’s STO (Safe Torque Off) timing sequence for vertical axis applications.

EMC Shielding Architecture: The motor housing is precision-machined aluminum alloy with continuous metal-to-metal contact between the end shields and the stator frame, forming a Faraday enclosure around the stator winding. This enclosure provides a low-impedance return path for high-frequency common-mode currents induced by the drive’s PWM output on the motor phase cables. The encoder cable shield is terminated at the motor connector shell, which bonds directly to the housing ground. Combined with the differential serial encoder interface and a properly shielded power cable with 360° shield termination at both ends, this shielding topology allows the motor-drive system to meet EN 61800-3 Category C2 conducted and radiated emission limits without additional ferrite suppression on the motor cable.

System Integration Benefits

• Homing-Free Axis Startup: The 23-bit multi-turn absolute encoder retains axis position through power cycles without battery backup on the drive side. At power-on, the drive reads the current absolute position within the first encoder communication cycle, eliminating reference travel routines and reducing machine startup time by 2–15 seconds per axis depending on axis travel and homing velocity profile.
• Consolidated Brake Hardware: The integrated B2 holding brake eliminates the external brake caliper, mounting bracket, separate 24 V power circuit, and associated wiring that would be required on a motor without this option, reducing panel wiring complexity and the number of components subject to mechanical wear and periodic inspection.
• High-Bandwidth Position Loop: The 8,388,608 count/rev encoder resolution supports position loop bandwidths above 200 Hz on mechanically stiff loads, enabling settling times below 5 ms and contouring path errors below 10 µm in multi-axis linear interpolation at feed rates up to 60 m/min.
• Sub-Millisecond Torque Response: Field-oriented control (FOC) executed by the paired POSIDRIVE or POSIDYN drive produces torque response times below 1 ms from command input to shaft torque output, supporting real-time motion profiles distributed by EtherCAT or PROFINET IRT master controllers with 250 µs or 500 µs cycle times.
• IP65 Deployment Flexibility: The sealed motor body allows installation in wash-down zones, dusty machining environments, and outdoor enclosures without additional IP-rated motor covers, reducing installation cost and eliminating the thermal penalty of enclosing a naturally convection-cooled motor in a sealed housing.
• Encoder Diagnostic Transparency: The A5 encoder transmits internal temperature and error status flags within each position telegram. The drive can expose these parameters to the PLC or HMI via the fieldbus, enabling predictive maintenance alerts — for example, flagging encoder temperature exceedance before a thermal shutdown occurs — without additional sensor wiring.
• Overload Thermal Headroom: The Class F insulation system and natural convection cooling provide a thermal margin of 30–40 °C above the steady-state winding temperature at rated current, allowing the drive to command 2–3× rated torque for overload durations of up to 5 seconds without exceeding the insulation temperature limit. This supports applications with intermittent peak torque demands such as press feeders, indexing tables, and robotic joint actuators.
• Standardized Mechanical Interface: The 130 mm IEC flange and smooth shaft conform to DIN 748 and IEC 60072 dimensional standards, allowing the motor to be substituted into existing machine designs — or paired with standard planetary gearboxes and bellows couplings — without modifying the mechanical interface, motor mounting plate, or coupling hub bore.
• Reduced Cable Count: The A5 encoder’s single serial cable carries position, velocity, commutation angle, temperature, and diagnostic data simultaneously, replacing the multi-conductor resolver or incremental encoder cables used in older servo motor generations and reducing the number of cable entries through machine enclosure walls.

Quality Assurance & Global Logistics

Each LSC-130-3-20-560-A5B2R1PM0M unit shipped from our Xiamen, China operations center is a genuine LTI MOTION component procured through verified industrial distribution channels. Pre-dispatch inspection covers: visual examination of the motor housing, connector interfaces, and nameplate labeling; serial number cross-verification against manufacturer documentation; phase-to-phase and phase-to-ground insulation resistance measurement at 500 V DC (minimum 100 MΩ acceptance threshold); and encoder communication verification using a compatible drive interface to confirm A5 encoder data integrity and brake coil continuity. Units are packed in anti-static foam-lined export cartons with silica gel desiccant packs and calibrated shock-indicator labels to protect the encoder optics and brake spring assembly during international transit.

Outbound shipments depart Xiamen via DHL Express, FedEx International Priority, and UPS Worldwide Express. Typical transit times: 3–5 business days to Western Europe; 2–4 business days to Southeast Asia and Japan; 5–7 business days to North America. Full export documentation — commercial invoice, packing list, certificate of origin, and HS code classification — is prepared for each consignment by our in-house logistics team to minimize customs clearance delays at the destination port. All units are covered by a 12-month warranty from the date of dispatch, applicable to manufacturing defects in materials and workmanship under normal operating conditions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.