Maxon Precision Motors: Miniature DC Servo Controller
May 23, 2013
The ESCON 50/5 OEM module is a four-quadrant pulse width modulated (PWM) unit that can efficiently control PMDC and BLDC motors containing hall effect sensors, with power levels up to 250 watts.
he OEM module features very fast digital current control bandwidth capabilities enabling peak DC motor current (and therefore torque) control, and speed control from 0 to 150,000 rpm. Motor speed can be set for open or closed loop with preset current/torque levels, or the motor torque and direction can be set with analog inputs. The inputs can be scaled and midpoints independently set with the PC graphical user interface. Detailed design guides are supplied allowing easy integration onto the main equipment PCB. There is also an evaluation board for easy initial test and measurement. The unit can be used with an external potentiometer or the integrated on-board potentiometer. For applications with existing PWM signals available this can also be used as a set value input. Full four-quadrant control can be achieved with brushless motors using only hall sensors. A DC tach or encoder can be optionally used. Protection features include overcurrent, overtemp, undervoltage and overvoltage. The controller has a 98% efficiency and can be used on common 12, 24 and 48 VDC systems.
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