ESCATEC designs an innovative motor control for surgical drill

March 01, 2016 -- ESCATEC, one of Europe's leading providers of contract design and manufacturing services, has designed a novel motor control for a surgical drill for one of its customers.  The challenge was to create a motor control that is very precise as this is vital for medical procedures. 

"We have a growing international reputation for designing innovative solutions," said Christian Dünki, ESCATEC's Lead Architect for Medical Applications.  "In this particular case, we had to design a means of being extremely accurate with the control of the drill motor.  In addition, we had to create a solution to allow starting the motor through load ranges from free run up to high torque, including stall detection and active stop, plus an oscillation mode with very low angle drift."

ESCATEC's solution used a sensorless brushless DC motor because it is maintenance free, requires no expensive sensors, has higher efficiency, produces no carbon dust, is smaller, and there is no electrical sparking.

The precision motor control was achieved by applying a specially written, speed-dependent, rotor-position detection algorithm.  Combining this position detection, including an additional algorithm to detect the rotor position at standstill, with different PWM (Pulse Width Modulation) control schemes enables the motor to be controlled independently of the applied mechanical load, inclusive of stand-still during direction change.  The controller is in open-loop mode only during the first phase of the ramp-up.  Afterwards, the position-detection is used to calculate the power to reach the requested speed.

In addition, ESCATEC designed the battery protection circuitry that ensures that the battery lasts for its expected lifetime.  Combining this software-controlled protection circuit with an external charging device enables the battery to be safely charged to its full capacity, and the capacity calculated and stored into the motor controller's memory as a battery condition indication. 

"Our solutions for customers are often innovative enough to be patentable," explained Michael Walser, ESCATEC's Head of R&D.  "Any patents usually become the property of the customer to provide them with unique selling points and protection against competitors."

ESCATEC is one of the few EMS companies to have ISO 13485 for the design and manufacture of medical devices and develops medical device software according to IEC 62304.



Read the complete story ...


Review Article Be the first to review this article
Featured Video
Editorial
Latest Blog Posts
Joseph LopezPROSTEP INC Blog
by Joseph Lopez
OpenPDM MIGRATE supports Windchill Bulk Migrator
Roberto FrazzoliMCADCafe Editorial
by Roberto Frazzoli
A closer look at CCE’s EnSuite – Cloud ReVue LiveLink
Jobs
Service Software Expert-CATIA & CAA for Dassault Systemes at Shanghai, China
Director, Industrial Machinery Solutions- SISW PLM for Siemens AG at Livonia, Michigan
Mechanical Engineer in HVAC – Mid-Level for Gordon Prill, Inc at Sunnyvale, California
Product Design Engineer - Softgoods for Apple Inc at Cupertino, California
Mechanical Engineer II for Aehr Test Systems at Fremont, California
Electrical Engineer for Dinter Engineering at Reno, Nevada
Upcoming Events
The Design. Engineer. Build. Conference at Anaheim Convention Center Anaheim CA - Aug 10 - 12, 2021
RAPID + TCT at McCormick Place Chicago IL - Sep 13 - 15, 2021
FABTECH 2021 at McCormick Place Chicago IL - Sep 13 - 16, 2021
Western Manufacturing Technology Show WMTS 2021 at Edmonton Expo Center, Edmonton Canada - Sep 14 - 16, 2021



© 2021 Internet Business Systems, Inc.
670 Aberdeen Way, Milpitas, CA 95035
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation GISCafe - Geographical Information Services TechJobsCafe - Technical Jobs and Resumes ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise