phySPACE
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phy SPACE Stepper Motor Series for SPACE applications, Standard and Customised solutions In Focus With 25 years of space heritage and over 300 motors in space we know how to optimise weight, power consumption, thermal dissipation and stray magnetic flux without sacrificing precision or reliability. phy SPACE represents a standard stepper motor series for SPACE applications. This series comes with features essential to usage in extreme environments. Beyond that it is also the basis for customised projects - to optimise motor-load coupling. Our phy SPACE stepper motors are costefficient, clean and reliable even within extreme environments. The phy SPACE series is developed and built to resist vacuum, vibrations, low/high temperature and radiation while maintaining high performance, precise positioning, long life. Highlights Performance & Lifetime phytron phy SPACE motors are based on a technology that can also be found in the most challenging projects of our time. From a variety of satellites up to the Mars rover Curiosity: phytron motors drive applications in distant worlds - highly accurate, reliable and durable. Driven within their specification range, high-quality components and a proven design make sure: These motors won’t let you down! Cleanliness phytron motors for use in space contain only materials that also meet the requirements of the ECCS (European Cooperation for Space Standardisation). Thus, each material has a maximum TML (Total Mass Loss) value of 1% and a maximum CVCM (Collected Volatile Condensable Materials) value of 0.1 %. You will receive your space motor, double-wrapped and vacuum-sealed. Radiation Resistance Standard • 2-phase stepper motors • holding torques from 3.1 to 420 mNm without gearing • diameters from 20 to 57 mm • 200 steps (1.8° per full step) • designed for high shock and vibration loads • 4 leads parallel • preconditioned, protection IP 20 • embedded K-type thermocouple • Ambient temp. -40 °C... +120 °C • up to +200 °C (winding) • radiation up to 106 J/kg • bake-out temperature up to 200 °C (24 h) • outgassing TML <1 %, CVCM <0.1% (at <125 °C) Options • “light weight“ upgrade (Titan) • “space-testing“ upgrade (vibration, shock, thermal cycling) • Winding cold redundant • for Cryo applications up to -269 °C Customised Solutions • special designs based on the phy SPACE series • Gears Edition 2015 February Extreme. Precision. Positioning.

phy SPACE – data sheet Extreme phy SPACE stepper motor Structure design The structure design of the phy SPACE motors presents an optimum of lightweight, stiffness and surface protection. As is commonly done in high-vacuum class all structural elements such as housing, flanges and shafts are made of stainless steel. Even the standard version in stainless steel is optimised in terms of weight: The quadratic flange is reduced to flange lugs and the flanges are hollowed to save additional weight. In order to save even more weight the phy SPACE comes with the option for a „light-weight“material...

phy SPACE – data sheet Preconditioning The selected materials and components are outgassed by a phytron process at up to 200 °C in vacuum chambers, so that outgassing materials cannot deposit in the ball bearings or inside the motor. This way we provide a minimum molecular contamination of the surrounding system so that the motors can even operate close to optical systems. Handling and Storage phy SPACE motors are primarily designed for use in a vacuum. For this reason the motors must always be handled under controlled conditions: On the ground at 20 °C +/-10 °C and relative humidity <=50%,...

phy SPACE – data sheet Technical Characteristics Standard Number of steps / step angle General Characteristics Physical step accuracy (non accumulating) Preferred direction Bearing clockwise (facing the motor shaft) quality / arrangement Lubrication Housing Protection class Expected lifetime (typical) Operating voltage Control Leads: amount / wiring / wire exit ABEC7 / Duplex (front)+ floating bearing (rear) space grade compatible stainless steel „light weight“ titan up to 48 V bipolar 4-leads bipolar / parallel / axial Lead insulation Temperature sensor cold redundant Dielectric strength...

phy SPACE – data sheet Stepper motor space 20 to 57 K Dimensions / Electrical and Mechanical Charcteristics Rotor inertia Power-OFF torque Mechanical Charcteristics phy SPACE Standard 200-step 4 lead parallel bipolar Electrical Characteristics Holding torque in bipolar mode with parallel windings. Two phases on at rated current 2) Axial radial loads are for mounting purposes only. A flexible coupling must be used in operation. The use of titanium parts reduces the overall weight by 20 %. differently with redundant winding All values given above refer to room temperature and atmospheric...

phy SPACE – data sheet Option: Shaft Design Dimensions Stepper motor More shaft options upon request. Derating - Duty-Cycle-Design for Applications in Vacuum Motors operating in a vacuum heat up very quickly depending on their duty cycle. Driven with nominal current the maximum temperature will be reached within several minutes. Therefore it is necessary to monitor the motor‘s temperature (K-element) or to design a duty cycle with enough off-time to always keep the motor a safe temperature level. The shown curve is set at an environmental temperature of 20 °C. To give you an idea of how the...

phy SPACE – data sheet Half step mode Torque Characteristics Half step mode 525 600 Speed [rev./min] Speed [rev./min] Half step mode Half step mode Half step mode Motor Temperature Sensors: K-type Thermocouple The insulated temperature sensor in phytron motors is integrated in the motor windings. The response time to temperature changes of the windung is very short, compared to temperature sensors mounted outside the motor housing. The temperature is measured all the time (even if only one motor phase is powered at a time), because the sensor is always mounted between the phases.