AC890 Variable Frequency Drives

The AC890 Variable Frequency Drives are compact, modular systems-capable drives engineered to control speed and position of open-loop and closed-loop, single- or multi-motor AC induction or servo motor applications.

The AC890 can be configured for 5 different modes of operation:

• Open-loop (volts/frequency) control This mode is ideal for basic, single or multi-motor speed control.
• Sensorless vector control with its ultra high performance sensorless vector algorithm, the AC890 delivers a combination of both high torque and close speed regulation without the need for any speed measuring transducer.
• Closed-loop vector control Full closed-loop flux vector performance can be achieved with the AC890 by simply adding an encoder feedback ‘technology box’. This provides 100% continuous full load standstill torque, plus a highly dynamic speed loop more than sufficient for the most demanding applications.
• PMAC servo control Allows the use of a PMAC motor like the TMW series, with feedback device.
• Active front-end module for line regeneration With this configuration, used in applications that require four quadrant or continuous braking operation, the regenerated energy is fed back into the grid with sinusoidal currents and unity power factor; a very low current harmonic content is achieved (THD less than 3%).
• Compatible with a wide range of feedback options The AC890 is compatible with any AC motor and virtually any speed/position feedback options. With this flexibility you may not even need to replace your existing AC motor to achieve high performance, saving you time and money.
• Incremental encoder
• EnDat 2.1 (SinCos) encoder
• Resolver

When starting a VFD motor project, In-Position Technologies engineers start by reviewing the key requirements to determine the optimum VFD for the job. They perform all necessary engineering calculations to make sure the VFD performs as required, within customer specification, and without unnecessary cost.

This includes:

• Motor torque, speed, and inertia matching
• Ensuring compatibility with the motor drive and available power
• Specifying the appropriate feedback device, encoder (incremental vs. absolute), resolver, etc…
• Verifying mounting compatibility, form factor checks, etc…
• Ensuring all necessary accessories are also specified

When ordering Parker AC890 Variable Frequency Drives as a part of a full system, IP Tech engineers review the solution to ensure:

• All parts and accessories necessary for a complete working solution are included
• All components have been checked and verified to work together as a system
• The selected components will perform as required by the project specifications