Lenze EVF9326-EV 9300-Series Vector Frequency Inverter

Product Overview

The Lenze EVF9326-EV (EVF9326-EV) is a high-performance vector frequency inverter from the 9300-Series, built to provide precise motor control for industrial-scale applications. Rated for 11.0 kW with a 3-phase 400 / 480 V mains connection, this drive employs advanced vector control algorithms to maintain superior speed stability and torque regulation, even under fluctuating load conditions. By eliminating the necessity for internal interference suppression, the drive offers design flexibility for systems that utilize centralized cabinet-level filtering, making it an ideal choice for high-precision machinery like extruders, printing presses, and industrial spindle drives.

Technical Configuration

The 9300-Series vector architecture is focused on delivering dynamic response and process accuracy, ensuring that motors operate at their peak efficiency.

• Vector Control Logic: Provides exceptional torque performance across the entire speed range, allowing for tighter control of process variables in applications requiring high dynamic accuracy.
• Mains Flexibility: Designed for dual-voltage 400 / 480 V operation, ensuring compatibility with international industrial power grids.
• Optimized Hardware: The absence of integrated EMC filtering allows for a more compact design, enabling engineers to apply specific, high-performance external filters tailored to the exact EMC requirements of the overall machine installation.
• System Integration: Like all 9300-Series units, it features a modular interface port that accepts fieldbus communication modules, allowing the drive to become a communicative node within larger PLC-coordinated networks.

Technical Specifications

Frequently Asked Questions

Why does this drive not include interference suppression measures?

The EVF9326-EV is an "EV" variant, intended for integration into systems where the designer prefers to manage EMC compliance using centralized, external line filters. This provides greater flexibility in cabinet design and allows for the use of filters rated specifically for the total system's noise profile.

Can this drive be used for high-accuracy speed control?

Yes, thanks to its vector control capabilities, it offers high speed-holding accuracy. For optimal performance, ensure that the motor's equivalent circuit parameters are correctly input or determined through an auto-tuning routine during commissioning.

Is this drive compatible with the standard 9300-Series communication modules?

Yes, it maintains full backward compatibility with the existing 9300-Series modular ecosystem, including all standard fieldbus gateways such as CANopen, Profibus, or Ethernet modules.

Engineering Integration and Operational Safety

• EMC Compliance Requirement: Because this drive lacks integrated suppression, it is essential to install a correctly sized external RFI filter between the mains supply and the drive input. Failure to include this will likely result in the system exceeding conducted emission limits.
• Cooling and Ventilation: With an 11.0 kW power rating, the drive generates significant thermal energy. Install the unit vertically in a well-ventilated enclosure, maintaining a minimum clearance of 100 mm above and below the device to ensure unobstructed convective cooling.
• Cable Shielding: To maintain vector control stability, use shielded, low-capacitance motor cables. Ensure the shield is terminated with a low-impedance, 360-degree connection to the drive's PE terminal to prevent high-frequency noise from escaping the motor output stage.
• Safety Protocols: Always verify the drive's internal error registers before attempting to clear a fault. In the event of a "Drive Overtemp" error, investigate the cabinet's internal ambient temperature, as this is often caused by clogged filter mats or failed ventilation fans rather than internal drive faults.