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Servo drive

For mobile robotics applications

Servosila manufactures servo drives providing CAN connectivity. The protocol software complies with CANopen, but not with CiA 402.

The CANopen servo drives use a proprietary drive profile (Photo: Servosila)

The IP68-rated servo drives are designed for outdoor applications. They feature a weight of 1 kg or 1,25 kg depending on the provided torque. This low weight increases mobility of the robotic system, reduces overall power consumption, improves motion dynamics and reduces the risk of serious injuries due to hits by moving robotic arms. The servomotors are controlled via CAN. They have either hollow shafts or pass-through connectors for power and CAN cables. These features are specifically introduced to facilitate robotic arm designs. The cables are hidden inside a robotic arm and therefore are well protected from possible damage caused by outdoor use. The products are watertight and can be used for work in dust, rain, and snow. Extended temperature range options are available.

Up to 15 servo drives are connectable to the host controller (Photo: Servosila)

The design of the servo drives is based on a harmonic reduction gears technology and a field-oriented BLDC motor control (FOC) principle. The drive implements a micro-controller that commands the drive’s shaft either in a “servo mode” or in a “speed mode” or in a “torque mode”. The built-in servo controller receives commands via CAN from an on-board computer of a host mobile platform, executes the commands, and sends telemetry back to the host platform. The CAN interface is able to connect up to 15 servo drives. The default bit-rate is 500 kbit/s.

The drive features multiple built-in safeguards and protection mechanisms that prevent the product from breaking down in harsh situations common to outdoor mobile robotic applications. An integrated power management module enables reconfiguration of a robotic system in the field.


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