{"id":2184,"date":"2022-02-23T15:30:44","date_gmt":"2022-02-23T14:30:44","guid":{"rendered":"http:\/\/devastrofein.mattheis-berlin.de\/rwt250\/"},"modified":"2023-04-25T14:32:55","modified_gmt":"2023-04-25T12:32:55","slug":"rwt250","status":"publish","type":"page","link":"https:\/\/www.astrofein.com\/en\/reaction-wheels\/rwt250\/","title":{"rendered":"RWT250"},"content":{"rendered":"

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Reaction Wheel RWT250 for Small Satellites<\/h1>\n

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RWT250 Features:<\/h2>\n
    \n
  • Integrated wheel drive electronics with latch-up protection<\/li>\n
  • Different operation modes for speed and acceleration using model based controllers<\/li>\n
  • High torque and speed stability (low noise)<\/li>\n
  • Provides extensive housekeepings (e.g.: speed, voltage, current, temperatures)<\/li>\n
  • Internal compensation of friction and time delays<\/li>\n
  • Low level emitted vibrations, due to the mechanical design and the high level of alignments and balancing<\/li>\n<\/ul>\n

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    RWT250<\/h3>\n
    \n \n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
    \n Parameter <\/td>\n \n RWT 250 <\/td>\n \n Remark <\/td>\n <\/tr>\n
    \n Angular momentum <\/td>\n \n 4.0 Nms <\/td>\n \n @ nominal speed <\/td>\n <\/tr>\n
    \n Nominal rotation speed <\/td>\n \n 5000 rpm <\/td>\n \n <\/td>\n <\/tr>\n
    \n Nomial reaction torque <\/td>\n \n 0.3 Nm <\/td>\n \n Max. commandable deliverable output\ntorque over the whole speed range <\/td>\n <\/tr>\n
    \n Power interface <\/td>\n <\/tr>\n
    \n Supply voltage <\/td>\n \n 23 to 34 V <\/td>\n \n <\/td>\n <\/tr>\n
    \n Power consumption <\/td>\n \n
    ≤ 3.0 W<\/div>\n
    ≤ 15.0 W<\/div>\n
    ≤ 200 W<\/div> <\/td>\n
    		\n
    Stand by (motor off)<\/div>\n
    @ 5000 rpm<\/div>\n
    Maximum (max. torque\/max. speed) <\/div> <\/td>\n <\/tr>\n
    \n Mechanical interface <\/td>\n <\/tr>\n
    \n Mass <\/td>\n \n \u2264 3.0 kg <\/td>\n \n <\/td>\n <\/tr>\n
    \n Moment of\ninertia <\/td>\n \n
    7.64e-3<\/sup> kg m2<\/sup><\/div> <\/td>\n
    		\n Rotating mass <\/td>\n <\/tr>\n
    \n Dimension <\/td>\n \n
    Height: ≈100 mm<\/div>\n
    Diameter: 200 mm <\/div> <\/td>\n
    		\n <\/td>\n <\/tr>\n
    \n Temperatures <\/td>\n <\/tr>\n
    \n Operation <\/td>\n \n -20 \u00b0C to +50 \u00b0C <\/td>\n \n <\/td>\n <\/tr>\n
    \n Start-up <\/td>\n \n -30 \u00b0C to +60 \u00b0C <\/td>\n \n <\/td>\n <\/tr>\n
    \n Survival temperature <\/td>\n \n -30 \u00b0C to +70 \u00b0C <\/td>\n \n <\/td>\n <\/tr>\n
    \n Data interface <\/td>\n \n RS485\/CAN <\/td>\n \n <\/td>\n <\/tr>\n
    \n Design lifetime <\/td>\n \n > 7 years <\/td>\n \n Depending on electronics grade (up to 10\nyears) <\/td>\n <\/tr>\n
    \n Storage time <\/td>\n \n > 3 years <\/td>\n \n (incl. 240 h of ground operation) <\/td>\n <\/tr>\n <\/table>\n<\/div>