Drives and Control Solutions

Motors, Control Solutions, Power Transmission and Advanced Motion Technology                                                                 

September 3, 2019

Virtual sensor reads safe speed

B&R has developed a virtual sensor for its ACOPOS P3 servo drive: the Safe Speed Observer. It determines speed in accordance with SIL 2 / PL d / CAT 3 requirements, reducing the cost of implementing the Safely Limited Speed safety function by eliminating the need for a safe encoder.

From the electrical variables of a permanent magnet synchronous motor, the Safe Speed Observer calculates two redundant models of the motor – achieving a high safety level for the calculated speed. The virtual sensor can be used for both linear and rotary synchronous motors.

Easy configuration

The Safe Speed Observer is easy to configure in the Automation Studio engineering environment via the respective encoder interface. The user can implement the safety functions available for the safe axis from the safety library. This new solution is made possible by the drive-integrated safety technology of SafeMOTION.

Source


Editor's Pick: Featured Article


 

The savings keep coming when you use a variable frequency drive (VFD) with synchronous bypass and transfer capabilities. It can help reduce up-front capital costs and long-term energy and maintenance costs in various motor-control applications. And along with the cost savings, the VFD can help you increase efficiency and achieve more flexible process control.

A VFD with synchronous capabilities allows you to operate one motor continuously with variable speed control or to start and synchronize multiple motors. It also gives you the ability to soft start large motors.

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As a leading manufacturer of drive technology, we also supply mechanical variable-speed gearmotors. For both series, VARIBLOC®and VARIMOT®, you can easily infinitely adjust the speed mechanically using a handwheel or remote control.

Speeds of up to 45 kW can be easily adjusted mechanically

Mechanical variable-speed gearmotors are simple yet robust drive components that represent an inexpensive alternative in many materials handling and process engineering applications. This is because you control the speed infinitely variably yourself: mechanically using a handwheel or via remote control. The process does not involve any costly control cabinets or frequency inverters at all.

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