Zephyr Controller

Powerful and Compact

The Zephyr® controller is a powerful, compact, cost-effective digital magnetic bearing controller for turbomachinery and rotating equipment, recommended for machinery in the power range of 1 MW to 18 MW.

The Zephyr controller is simple to operate and offers flexible mounting options, yet still provides the high processing performance that allows for the use of complex algorithms.

Automated commissioning and tuning, remote monitoring and adjustment capabilities, and built-in diagnostic capabilities provide powerful performance, available with 5- or 4-axis control configurations.

Zephyr AMB controller

Skid-Mounted Controller Option

An industry-first, the Zephyr controller is available in a skid-mounted cabinet, providing optimized performance with a compact equipment footprint.

Certified for Class 1 / Division 2 hazardous area installation, the on-skid controller eliminates costly cabling that would run to a control room and speeds up the commissioning process.

Click below to read more about the introduction of the on-skid controller for turboexpander applications.

Read More

L.A. Turbine ARES AMB Turboexpander Compressor

Zephyr Controller Features


  • 5-axis controller (option for 4-axis control)


  • Hardwired discrete DCS interface*
  • Analogue diagnostic outputs*
  • Temperature (RTD)**
  • MODBUS RTU or TCP slave*
  • SOAP slave*

Control Law Capability

  • SISO/MIMO controller with tracking filters
  • Multi-coordinate control (MCC)
  • Automatic balancing algorithm (ABA)
  • Runout compensation
  • Open loop feed forward**
  • Advanced amplifier algorithm (for software flux feedbac

Sensor Support

  • Inductive
  • Magnetic displacement**
  • Flux feedback**

Diagnostic Capabilities

  • Web server interface*
  • Event logging*
  • Automatic clearance check
  • Integrated transfer function measurement**
  • Integrated spectra capability**
  • Integrated harmonic capture**
  • 3rd level trip*
  • Built-in tools show compliance with ISO sensitivity performance criteria*


  • Support for purge protected bearings

* Available as an option or as standard depending upon variant
** Not available on some variants


  • CE
  • CB
  • TR-CU


Zephyr digital AMB controller

Typical Applications