KOLLMORGEN LY-S600-OZ Servo Drive – LY Series

KOLLMORGEN LY-S600-OZ: Closed-Loop Servo Amplifier for High-Precision Motion Control

The KOLLMORGEN LY-S600-OZ is a brushless AC servo drive from KOLLMORGEN’s LY Series amplifier family, engineered to deliver deterministic closed-loop control across torque, velocity, and position axes. In industrial motion control architectures, the servo drive occupies the innermost control loop — it is the component that translates a digital command from a PLC or motion controller into a precisely regulated current waveform delivered to the motor stator windings. Any latency, nonlinearity, or thermal drift at this stage propagates directly into positional error at the load. The LY-S600-OZ is designed to eliminate these error sources through a combination of high-bandwidth current regulation, resolver-compatible feedback processing, and a thermally managed power stage.

Within the LY Series, the LY-S600-OZ targets mid-range continuous power applications where panel space is constrained and dynamic response requirements are stringent. Its compact panel-mount form factor allows dense multi-axis cabinet layouts without sacrificing the current loop bandwidth necessary for smooth acceleration profiles. The drive is optimized for pairing with KOLLMORGEN’s AKM and Goldline brushless servo motor families, where matched motor-drive commissioning via KOLLMORGEN WorkBench software eliminates manual gain-tuning iterations and reduces commissioning time significantly.

Applications where the LY-S600-OZ is deployed include articulated robot joint actuation, CNC axis servo control, high-speed packaging pick-and-place, semiconductor wafer handling, and precision dispensing platforms — environments where the servo drive must sustain rated output continuously while maintaining sub-millisecond current loop cycle times.

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Technical Parameters

Detailed electrical ratings (AC input voltage range, peak/continuous output current, bus voltage) must be confirmed against the official KOLLMORGEN LY-S600-OZ datasheet. Contact our technical team for the full specification sheet prior to ordering.

Hardware Logical Analysis

The LY-S600-OZ power stage is built around an IGBT-based three-phase inverter bridge operating at a fixed PWM switching frequency. At this switching rate, the current ripple in the motor windings is kept within a range that allows the current feedback loop to close at a bandwidth sufficient to track torque commands without introducing audible noise or thermal stress on the motor insulation. The resolver-to-digital converter (RDC) embedded in the drive processes the resolver’s sine/cosine signals into a 16-bit angular position word at each current loop sample, providing the field-oriented control (FOC) algorithm with the rotor flux angle required for accurate d-q axis current decomposition.

EMC compliance is achieved through a multi-layer approach: the DC bus capacitor bank provides local energy storage that decouples the inverter switching transients from the AC supply, while common-mode chokes on the motor output leads suppress high-frequency conducted emissions that would otherwise couple into adjacent signal wiring. The drive’s PCB layout separates the high-current power traces from the low-level analog signal paths using a ground plane partition strategy, reducing the risk of ground-loop interference on the velocity and position feedback signals.

The thermal management architecture uses an aluminum extrusion heatsink bonded directly to the IGBT module baseplate, with a thermistor embedded at the junction to provide real-time over-temperature monitoring. If the junction temperature approaches the protection threshold, the drive reduces PWM duty cycle before triggering a fault, allowing the host controller to execute a controlled deceleration rather than an abrupt torque cutoff — a behavior that protects both the mechanical load and the motor windings from inertial shock.

The position loop, when enabled, implements a proportional-integral-derivative (PID) structure with velocity feed-forward. The feed-forward term is derived from the differentiated position command, allowing the drive to pre-compensate for the inertia of the load without waiting for a position error to develop. This architecture is particularly effective in point-to-point motion profiles where settling time is a critical cycle-time constraint.

System Integration Benefits

• Deterministic Current Loop Execution: Fixed-frequency PWM and synchronous RDC sampling ensure that the torque command is executed within a bounded latency window, eliminating jitter-induced velocity ripple in multi-axis coordinated motion.
• Field-Oriented Control (FOC) Architecture: D-q axis current decoupling allows independent regulation of flux-producing and torque-producing current components, delivering linear torque response across the full speed range without magnetic saturation artifacts.
• Resolver Feedback Robustness: Resolver-based position feedback is inherently immune to optical contamination and vibration-induced encoder count loss, making the LY-S600-OZ suitable for harsh factory environments where incremental encoders are unreliable.
• Velocity Feed-Forward Compensation: Pre-computed velocity feed-forward reduces following error during dynamic motion profiles, improving path accuracy in CNC contouring and robotic trajectory tracking without increasing proportional gain — which would otherwise reduce phase margin and risk instability.
• Over-Temperature Derating Before Fault: Graduated thermal derating preserves system uptime by allowing the host controller to execute a controlled stop rather than triggering an immediate fault shutdown, reducing mechanical shock on gearboxes and couplings.
• Compact Multi-Axis Cabinet Layout: The panel-mount form factor with integrated heatsink allows adjacent drive mounting with minimal inter-drive spacing, enabling high-axis-count cabinets within standard 600 mm enclosure depths.
• WorkBench Software Integration: KOLLMORGEN WorkBench provides auto-tuning, Bode plot analysis, and real-time oscilloscope functions over the service port, reducing commissioning time and providing documented gain settings for maintenance records.
• Analog and Digital Command Compatibility: Support for ±10 V analog velocity/torque commands and digital step/direction inputs allows the LY-S600-OZ to interface with legacy PLC analog output modules as well as modern motion controllers without additional signal conditioning hardware.
• Regenerative Energy Handling: The DC bus architecture supports connection of external regenerative braking resistors, allowing kinetic energy from decelerating loads to be dissipated safely in multi-axis systems with high inertia loads.
• Diagnostic Transparency: Fault codes are latched and readable via the service interface, providing maintenance personnel with a timestamped fault history that distinguishes between over-current, over-voltage, under-voltage, and thermal events — reducing mean time to repair (MTTR).

Quality Assurance & Global Logistics

Every KOLLMORGEN LY-S600-OZ unit supplied by siemensplc.com is sourced from verified distribution channels and subjected to a structured incoming inspection protocol. Visual inspection confirms connector integrity, label authenticity, and the absence of physical damage consistent with counterfeit or improperly stored stock. Where applicable, functional power-on verification is performed to confirm that the drive initializes without fault codes and that the resolver feedback circuit responds correctly to a reference excitation signal.

Units are packaged in anti-static foam-lined cartons with moisture-barrier bags and desiccant packs, conforming to IEC 60068-2 transport and storage requirements for electronic assemblies. For international shipments, we prepare full export documentation including commercial invoice, packing list, and certificate of origin from Xiamen, China. We support DDP, DAP, and EXW Incoterms and work with established freight forwarders experienced in industrial electronics export compliance. Typical transit times to major industrial hubs in Europe, Southeast Asia, and North America range from 3 to 7 business days via express air freight. All units are covered by a 12-month warranty from the date of shipment.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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