ESCON module 50/4 EC-S servo motor controller for sensorless operation of brushless DC motors

Written by: Maxon Motor UK Ltd | Published:

As addition to the ESCON servo controller family, maxon motor now presents a miniaturised OEM plug-in module for sensorless BLDC applications. The compact, powerful 4-quadrant PWM servo motor controller offers efficient control of permanent-magnet activated sensorless BLDC motors (brushless DC motors, so-called EC motors) with-out Hall sensors up to approximately 200 Watts. As part of the ESCON family it stands for high usability, exceptional performance, and unprecedented power density in servo motor controller technology. Sensorless operation offers the best conditions for a high reliability at low system costs.

The innovative OEM plug-in module features excellent control properties. The drift-free yet extremely dynamic speed behavior enables speeds up to 120'000 rpm and provides extensive functionality with free configurable digital and analog inputs/outputs. It perfectly matches maxon's motor range to suit even highest-demand applications and dynamic drive solutions and can be operated in speed controller (closed loop) and speed controller (open loop). All these features create ideal conditions for the use in cost-sensitive applications as well as elevated reliability requirements. The decisive factor is the low system complexity due to sensorless operation. Thereby, it fully integrates into complex applications with little effort. This with a distinctive benefit: Customers can fully focus on their main task; the development of their own device. For the motor control part they can make use of maxon motor's vast drive know-how already built into the ESCON Module. A detailed Motherboard Design Guide is available for integration to OEM PCBs and a suitable motherboard makes initial commissioning an easy task.

The compact servo controller is controlled by an analog set value. It can be specified by means of analog voltage, by external or internal potentiometer, by defined value, or by means of a PWM signal with variable duty cycle. Other interesting features are for instance the ability to enable or disable the power stage de-pending on the direction of rotation as well as sensorless acceleration and deceleration by employment of defined speed ramps.

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