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Automated Prison Doors

July 7, 2011

Groschopp worked with a manufacturer to create an automated system for moving heavy prison doors (weighing anywhere from 200-1200 lbs each). For this application, tight installation using a right angle reducer and the smallest possible motor was important. Because the prison doors would only be operating intermittently, Groschopp was able to use a smaller—and less expensive—PMDC motor. This infrequent operating also meant a heat sink wasn’t an essential part of the gearbox.

The DC motor matched with the 5:1 ratio right angle gearbox was able to meet the high torque and smooth operation requirements of the manufacturer. It was also important for the motor to be back-drivable so it could be manually operated in the event of a power outage. Groschopp tested 1.6 million cycles without failure to make sure this design would be a reliable solution for the manufacturer and end customers.


Challenges

  • Sufficient torque for smooth operation of 200-1200 lb doors
  • High security application, must be reliable
  • Right angle gearmotor with back-drivability

Solution

  • PMDC right angle gearmotor without a heat sink
  • Tested 1.6 million cycles
  • Compact design

 

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Universal Motors

Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Standard frame sizes and motor features can be found on the Universal page.

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