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VSS / VSH

-11 6 Vacuum to 10 mbarTemperature –270 to +300 °C Radiation Hardened to 10 J/kgSpace

Extreme Environment Stepper Motors

Environments Preparing the VSS/VSH Stepper Motors

Phytron offers different categories of extreme environment stepper motors:

VSS-FV, VSH-FV

Fine Vacuum to 10 hPa (10 mbar) Temperature range –20 °C to 150 °C Radiation resistance 10 J/kg
-3-3

VSS-HV, VSH-HV

High Vacuum to 10 hPa (10 mbar) Temperature range –20 °C to 200 °C
-7-7 Radiation resistance 10 J/kg
2

VSS-UHV, VSH-UHV

Ultra High Vacuum to 10 hPa (10 mbar) Temperature range –20 °C to 300 °C
-11-11

Technical Information

Radiation resistance 10 J/kg
6 Two-phase stepper motorsHolding torque from 3.4 mNm to 9.9 NmDiameters from 19 to 125 mmStandard number of steps 200Optional 72, 500Step accuracy 3% for 1.8° stepper motor and 5% for 0.72° stepper motorDesign voltagesize 19 to 57: 42 V

VSS-UHVC, VSH-UHVC

Cryo Ultra High Vacuum to 10 hPa (10 mbar) Temperature range –270 °C to 40 °C
-11-11 Radiation resistance 10 J/kg
6

VSS-Space, VSH-Space

High shock and vibration loads The VSS/VSH series of Phytron stepper motors are designed to be used inside vacuum chambers. This eliminates the use of motion feed throughs that generate particulates.Since the stepper motor is relatively simple in design, it can be adapted to operate in extreme physical environments with a few modifications. Under normal conditions, only the bearings are subject to wear.For extreme environment applications, special windings, bearings and lubricants are used, as well as special insulating material and special adhesive.To accomodate most extreme environmental conditions, Phytron VSS/VSH stepper motors are provided in different grades. Each grade covers a vacuum rating, a temperature range and a radiation level.Assembly, cleaning and conditioning of the Phytron VSS/VSH stepper motors results in a low outgassing rate which makes Phytron the reliable choice for all the extreme environment applications.
DC

Customized design Optional

size 65 to 125: 200 V
DC Modified versions of the type VSS/VSHstepper motors:Climatic applications Reduced magnetic emissionAggressive environment operationClean room applicationsto clean room class 100 Double shaftVGPL low backlash gearKTC thermocouple to monitor winding temperature in the range of –40 °C to 300 °CPt100 resistor sensor to monitor winding temperature in the range of –200 °C to +300 °CCouplingsCustomized constructionsMotors with spindle Motors with hollow shaft etc. Protection class IP 00 for vacuum versionIP 40 for temperature and radiation version(not for vacuum applications)Standard number of leads: 4optional 5, 6 or 8Outgassing holes to avoid pockets of trapped gas
Stepper Motors VSS / 07-2 GB