Integrated electronic controls functions
Ravens differ from other birds through skills which otherwise only primates possess. They have the ability to use tools and can assess social relationships between other ravens – a prerequisite to appropriate and clever conduct within complex social networks. Today’s modern drive technology should be just as adaptable: intelligent, communicative and highly flexible – these are ROTEK’s goals in Bremerhaven.
Drives need to meet a diversity of demands under a wide range of environmental conditions. This flexibility should include mechanical design, electronics and fast service.
These considerations lead to the development of the BLDC- motor ROMOTION. The intelligent electronics offer possibilities that go far beyond simply controlling the motor winding. This allows the drive to autonomously assume operation of higher level controllers, rendering the latter dispensable or significantly simplified. This reduces the cost of plant design.
Its communicative skills are evident in warehouses. In rack loading systems, for instance, several motors may be networked via a CAN bus gateway to coordinate the execution of each motor’s specific task.
Also, should a motor need to be replaced, the CAN bus gateway will, after installation, detect and automatically parameterize the new drive. This saves valuable servicing time.
The ROMOTION is a three-phase, brushless direct-current motor with integrated electronic controller. It operates without sensors in the basic version, offering two important advantages: It eliminates the cost of sensors and wiring and the motor will run more smoothly, with completely identical torque in both directions. Watch how to start up a ROMOTION in this video.
When positioning boxes of varying weights with fast cycle times, the software may be programmed to approach the stop position optimally and without time consuming correction. The dynamic response of the system will be determined when the pallet is accelerated at maximum current. This is used, whilst travelling at top speed, to calculate the load-dependent time required for deceleration. After active braking, the motor will change to stepper motor mode for the last 1° to 2° to approach stop position synchronously and highly over-excited. An output for braking resistors is a standard feature of the control electronics.
For a different application, in which a transport container must remain horizontal at all times, ROTEK can offer a tilt sensor incorporated in ROMOTION directly for electronic control. The drive may be calibrated during commissioning. This saves the plant manufacturer the effort of installing and wiring the sensor. Connecting the sensor directly to the motor controller furthermore ensures fast responses and subsequently, particularly smooth travel.