CP310250 Kollmorgen ServoStar SP High-Voltage Servo Drive

Description

Product Model: CP310250

• Product Brand: Kollmorgen
• Product Series: CP310 / ServoStar family
• Product Features:
  • High-voltage modular servo drive with 250 A RMS output
  • Supports 480 V AC input, peak current 500 A
  • Real-time EtherCAT, Ethernet/IP, CANopen support
  • Safety features (STO, SLS) and diagnostic monitoring

Applications & Industry Context

In large-scale automation systems where high torque, high-speed motion is demanded, the CP310250 from Kollmorgen comes into play as a heavy-duty servo drive. You’ll typically find it in sectors such as metal forming, rolling mills, large presses, robotics for heavy payloads, crane hoisting, and direct-drive machines. In these environments, the challenges are not trivial: managing regenerative energy, handling high peak currents, maintaining servo stability under load transients, and ensuring safety in harsh industrial electrical conditions.

For instance, in a sheet-metal rolling line, multiple axes working in unison must respond to variations in steel thickness, thermal expansion, or disturbances. The CP310250 offers the current headroom to absorb these dynamics while keeping control loops stable. In injection molding or die casting facilities, the drive’s ability to handle high instantaneous torque surges without saturation is critical to prevent mechanical stress or vibration. In high-speed gantry or robot arms moving heavy tooling, the drive’s speed control and real-time communication act as the hero of synchronization.

One field anecdote: an OEM retrofit replaced legacy drives in a gantry with Kollmorgen CP-series units (one being CP310250), and engineers observed smoother transitions at corners and less mechanical ringing—even under variable load. That kind of improvement often becomes a compelling justification in capital projects.

Because the CP310250 is part of the modular CP-/ServoStar family, it fits into scalable systems—when a line grows or additional axes are added, matching drives and modules follow the same control family, simplifying firmware, maintenance, and spares logistics. This modularity makes the CP310250 attractive not only for new builds but also for phased upgrades.

Product Role & System Fit

What is the CP310250 exactly? At heart, it’s a modular high-voltage servo amplifier / drive designed for industrial motion control systems. It takes in three-phase AC input (typically 480 VAC) and produces controlled outputs to servo motors or direct-drive motors, modulating current and voltage under precise feedback control.

In a broader architecture, the CP310250 sits downstream of a motion controller (which might manage trajectory, kinematics, interpolation, and coordination). The controller issues voltage or current commands or setpoints; the CP310250 executes them in the analog/digital domain, closing current loops, managing the DC bus, and protecting against faults. In EtherCAT or Ethernet/IP systems, the drive communicates real-time status, diagnostics, and command feedback with the master controller.

Because it’s modular, the CP310250 acts as a building block: you could deploy a single unit for a heavy axis or combine several in parallel or multi-axis racks. It fits into the CP/ServoStar ecosystem: same control firmware, shared setup tools, uniform diagnostics UI. That makes upgrades or replacements easier—your maintenance folks already know the interface.

Moreover, the CP310250 is expected to share design commonality with other CP-series models (e.g. lower-amp drives), which reduces training overhead. If your system needs a mix of high-amp and smaller axes, sticking with the same drive family ensures configuration uniformity, common fault codes, and simpler spares management.

Because of its role, the CP310250 is often the final power interface in motion control loops—the link that must be precise, reliable, thermally robust, and safe.

Installation & Maintenance Insights

Installing the CP310250 isn’t “plug and play” — best results come from care in layout, cooling, bus design, and wiring discipline.

First, mount the drive in a cabinet with good ventilation or forced airflow. The drive is not convection-cooled in high-demand applications; it expects ambient airflow of adequate CFM. If ambient exceeds ~50 °C, derating becomes necessary. Most drives recommend an enclosure temperature below ~45 °C.

Next, DC bus wiring: the incoming AC (3-phase) and the internal DC bus capacitors store energy, so cabling needs to be short, thick, and low inductance. Avoid long loops, and keep bus lines close together to reduce EMI. Grounding is critical—tie the drive frame and DC bus negative to protective earth properly.

Motor cabling should use shielded, twisted pairs (especially feedback lines). Keep the feedback/encoder lines separate from power or switching cables to avoid cross-coupled noise. A tip from field engineers: twist motor power and feedback cables in separate bundles and cross them only at 90° angles if they must intersect.

During startup, do a no-load test first. Monitor current, bus voltage, temperature, and ensure the drive doesn’t fault under mild loads. Use the diagnostics port and software to log loop stability (current and velocity loops) before pushing full load. Also, check regenerative behaviors—if your system returns energy to the drive, ensure braking resistors or regeneration circuits are properly sized.

For maintenance: since the CP310250 has no moving parts, failures are rare. Still, periodic visual inspections (dust, connector corrosion, torques) are wise. Confirm that cooling vents and filters are clean. Every few years, check the DC bus capacitors’ health via impedance or ESR measurements (in high-use systems, capacitor degradation is often a root cause of aging). Keep firmware and settings backed up. In cases of module replacement, always migrate configuration carefully (so no mismatches in tuning or feedback polarity).

If your system supports hot-swap (rare for high-power drives), ensure the replacement logic and power sequencing are safe. Always ramp in current slowly during commissioning to avoid damage to mechanical elements.

Technical Features & Benefits

The CP310250 is built for demanding motion control. Let’s dig into the features and what they mean for you.

High-Voltage, High-Current Output

The drive is designed for 480 VAC input ±10% (3-phase) and delivers 250 A RMS (continuous) with 500 A peak capability for short intervals. That headroom allows you to absorb torque surges and dynamic loads without clipping.

Modular & Scalable Architecture

As part of the CP / ServoStar product line, it’s modular — you can scale axes by adding more units, maintain consistent interface protocols, or upgrade drives without rewriting firmware logic.

Real-Time Communication & Feedback Support

Supports EtherCAT (CoE), Ethernet/IP, and CANopen interfaces. Feedback options include EnDat 2.2, HIPERFACE DSL, and resolvers. That flexibility helps you integrate with diverse motion systems.

Safety & Protection

Built-in Safety Torque Off (STO) and Safe Limited Speed (SLS) are included, enabling functional safety compliance. The drive also monitors IGBT temperature, bus voltage imbalance, phase current, and fault states in real time.

Cycle times as fast as ≤ 62.5 μs (in synchronized EtherCAT mode) allow tight control loops. The speed-loop bandwidth exceeds 1.5 kHz; current-loop response is high, enabling swift torque reactions.

Regenerative Energy Handling

The drive supports dynamic braking or grid regeneration, so when the motor is driven by inertia (e.g. in deceleration), energy can be recaptured rather than wasted. That helps in energy efficiency and thermal management.

Environmental & Mechanical

Protection rating is typically IP20 (designed for indoor cabinet mounting). Operating ambient 0–50 °C at full performance, with derating above 50 °C. Cooling is forced-air. Physical dimensions around 450 × 250 × 210 mm; weight ≈ 18.5 kg.

Diagnostics & Reliability

The drive includes onboard fault logging, health monitoring, and predictive diagnostics (e.g. thermal stress, bus ripple, current imbalance). MTBF (mean time between failures) is calculated in the design for high reliability.

All of these features translate into benefits: precise motion control even under transient loads, safer operation through built-in functional safety, easier integration via real-time networks, and long-term reliability in industrial environments. In practice, switching to a CP-series drive like the CP310250 often reduces tuning cycles, shortens commissioning times, and reduces motion ripple or vibration in high-speed axes.

Technical Specifications Table

Here’s a consolidated view of the key specs for CP310250:

Related Models

Here are a few alternative or sibling modules in the Kollmorgen CP / ServoStar family you may compare:

• CP310100 — Lower-current version (100 A) for lighter axes
• CP310400 — Higher-current version (400 A) for more torque-demanding axes
• CP320260 — Next-generation CP-series drive with slightly different voltage or interface spec
• CP310250-S — Safety-enhanced version of CP310250 (with extended functional safety features)
• ServoStar CD / SP family — variant drives in the same ecosystem with alternate packaging or interface
• CP303250 — 250 A but in older CP303 family with slightly different capabilities
• CP310250E — Enhanced model version for special customization