FAQ: What is speed feedback compensation and when should it be used?
Breadcrumb
Contact Us
contactUsAction
Speed feedback compensation is typically applied when there is mechanical resonance in the system and the speed loop gain cannot be raised to achieve good response, such as shortened settling time in positioning. It allows the increase of speed reference gain with the speed feedback gain kept low by adjusting the speed feedback compensation value. Because the speed feedback gain is low, there is no vibration added to the resonance part of the machine, and good response is achieved due to the higher speed reference gain.
The speed feedback compensation loop uses the speed feedback as the input. Using a proprietary algorithm, this signal is filtered to reduce the effect of disturbance and phase-lag compensation. The output is called the compensated feedback speed. This output, rather than the normal speed feedback signal may be selected via Pn110.1 for use in the speed control loop. Speed feedback compensation level, parameter Pn111, adjusts the gain of the speed compensation loop.
Please note that with speed feedback compensation enabled, disturbance response is degraded because speed feedback gain is reduced. Also, the inertia ratio in Pn103 must be correctly set for the speed feedback compensation to function properly.
Refer to section 6.2.6 in the Sigma II Servo System User's Manual for adjustment procedure.
SAFETY PRECAUTIONS AND INSTRUCTIONS FOR USE OF FAQ INFORMATION!
Please read and understand the product instruction manual before installing, servicing or operating Yaskawa products. FAQ content and illustrations are provided as technical advice to augment the information in manual, not supersede it. It is not possible to give detailed instructions for all types of installation or support activities. The information described in the FAQs are subject to change without notice to improve the product or FAQ. Yaskawa assumes no responsibility for errors or omissions or damages resulting from the use of the information contained in any FAQ. All warnings, cautions and product instruction for product use must be followed. Installation, operation and maintenance should be carried out by qualified personnel. Failure to observe these and other precautions highlighted in the product manuals will expose the user to high voltages resulting in, serious injury or death. Qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of Yaskawa products of the type described and have proper qualifications to perform the work.
Phone
If you have an urgent request, please call: 1-800-YASKAWA (927-5292) or 1-847-887-7000.Electronically
To contact us electronically, please select your type of request and complete the form.Yaskawa America, Inc. - Drives & Motion Division
2121 Norman Drive South
Waukegan, IL 60085