2015-02-07 16:59 GMT+02:00 Nicklas Karlsson <[email protected]>: > It is possible to buy ordinary three phase induction motors with built in > brake. >
Using motor with a brake and use planetary gearbox was my second option. I dropped it as unviable, because: 1) max torque should be limited at what is max torque for gearbox - not to damage it 2) since I need low rotation speed of platform - around 10 RPM, there is ~4:1 reduction with chain, so gearbox output shaft would be doing approximately 40 RPM 3) with 6 pole motor (~900 RPM), reduction ratio for gearbox should be around 22:1 4) with 100 Nm limit on output and 22:1 ratio, the brake should have a holding torque of 4-5 Nm AFAIK those brakes are much stronger, so any additional load on output shaft would break the gearbox instead of turning the motor. I guess I can ask the suppliers, if there are some options of weaker brake that would prevent breaking the gearbox in case of overload. Viesturs ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
