VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme Vacuum Conditioning The combination of selected materials and a special conditioning process reduce the outg

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1 详情联系 :TEL 87 QQ:78 ENG EXTREME VSS Stepper Motor For Applications up to Ultra-high-vacuum Motors for use in vacuum should t only withstand the vacuum ( bursting of air inclusions), they must t contaminate the vacuum either. By selecting suitable materials and optimised conditioning processes phytron VSS stepper motors are ideally suited for use in a vacuum. Through many years of experience with special materials for use in Space, we have put a focus on materials with minimal molecular outgassing and high heat resistance. This is the prerequisite for a high vacuum quality and genuine measurement results in scientific and medical applications. For exact positioning in vacuum, stepper motors are therefore particularly suitable because they can precisely position even without sensitive feedback providers. Therefore Highlights Performance & Lifetime phytron VSS stepper motors can be used in particularly challenging environmental conditions (radiation, cryo-temperatures and in a modified design even in Space). Since stepper motors do t generate jitter effects while holding a position, this techlogy is ideal for precisely aligning optical instruments, mirrors, antennas or samples e.g. in high-resolution microscopes, particle accelerators or molecular analysis devices. As a medium-sized company, we manufacture the VSS series in Germany and modify the standard motor to perfectly fit to your application. phytron in-vacuum motors are based on a techlogy 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 don t let you down! Cleanliness phytron motors for use in ultra high vacuum (UHV) contain only materials that also meet the requirements of the ECSS (European Space regulations). Thus, each material has a maximum TML (Total Mass Loss) value of % and a maximum CVCM (Volatile Mass Losses) value of. %. You will receive your UHV motor, double-wrapped and vacuum sealed. In Focus RoHS complient High Temperature Radiation Resistance Vacuum -phase stepper motors Holding torques from. mnm to Nm Diameters from 9 to mm Number of steps (standard) Step accuracy % for.8 Operating voltage Size 9 to 7: 7 V DC Size 8 to : V DC Protection class IP Standard connection: -lead parallel (option: series or 8-lead) Outgassing holes to avoid pockets of trapped gas Options VGPL precision planetary gear or Harmonic Drive gear Thermocouple type KTC/ Pt resistor sensor Resolver Double shaft Customised solutions Operating in an agressive environment Clean room applications to clean room class ISO (acc. to ISO -) Motors with spindle 详情联系 :TEL 87 QQ:78

2 VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme Vacuum Conditioning The combination of selected materials and a special conditioning process reduce the outgassing rates to a level that allows low pressures of - hpa in the customer application. For this purpose, individual components of the UHV motors, such as the wound stator, are specially conditioned before installation, so that outgassing materials cant be deposited in the ball bearings or inside the motor. The fully assembled motor is outgassed by a phytron process at least C in vacuum chambers. Increased outgassing temperatures are available on request. The rule of thumb: the outgassing rate decreases with a decimal power for every K increase of the outgassing temperature. In the actual application the motor should always be driven at least K below the outgassing temperature. High Temperature Temperature Management All materials selected for the UHV motors can withstand a short-term winding temperature of up to C. Due to the lack of convection in vacuum, the motors can heat up very quickly and often work at a high temperature level - depending on the duty-cycle. In our UHV motors we integrate a thermocouple to allow monitoring of the exact winding temperature. All vacuum motors can t only be ordered with optional hermocouple, but also with platinum probes (PT) or customer- specific sensors. This is how you protect your motors safe from overheating. Adhesives The adhesives used were specially developed for phytron s applications. They represent an optimum of strength, ductility, low outgassing rates and thermal resistance. The outgassing rates (TML, CVCM) comply with the European Space standards. While the first adhesive is t brittle even at K, the second adhesive retains sufficient strength even at a winding temperature of C for short periods without taking damage. Bearings The usage of un-lubricated ball bearings can cause so-called cold welding, and thus degrade and completely block the bearing. Therefore, it is advisable to use lubricated ball bearings whenever the application permits. For this purpose a special vacuum grease is necessary to provide t only low outgassing rates but also an extended life-time for the bearing. There is special lubrication for temperatures down to - C or even -7 C. However, the viscosity is so high that the efficiency decreases considerably. In low temperatures, the use of dry-lubricated bearings is recommended. Radiation Resistance Radiation resistance With ascending vacuum class motors are equally designed for higher radiation dose to be used in the vicinity of radiation sources (e.g. in medicine and research). While a fine vacuum motor can be safely used only up to a dose of J/kg, a UHV motor may be safely operated up to a dose of J/kg. A motor t designed for radiation will t only suffer degradation of the insulation and the adhesives - especially the grease of the ball bearing degrades, reduces the efficiency and ultimately blocks the motor. 详情联系 :TEL 87 QQ:78

3 详情联系 :TEL 87 QQ:78 VSS data sheet Structure design As is commonly done in high vacuum class all structural elements such as housing, flanges and shafts are made of stainless steel. Outgassing holes in the rear flange also allow rapid evacuation and purging of the motors and make sure that gas inclusions may occur. All structural elements of the magnetic circuit are basically protected against corrosion. This also allows temporarily handling in rmal environment. Handling phytron VSS motors are primarily designed for use in vacuum. Although the components of the magnetic circuit are basically protected against corrosion, the motors should ideally be handled in clean rooms and clean boxes. A storage is permitted only in phytron s original packaging. The motors are to be handled with suitable gloves. Since the rotor is magnetic, it must necessarily be handled in a clean environment so that metal particles may be drawn into the motor. That could lead to an impairment of operation, reduce the life time or even cause the failure of the motor by blocking. Service, Consulting and Customising Of course we are happy if you are satisfied by our standard! But even if our in-vacuum motor series contains the application experience of several decades - sometimes the standard is just t eugh. We like to fit our motor for your application, because sometimes even small changes make all the difference. Special applications require special support: Our service experts are available even after the purchase. Winding temperature [ C] Vacuum class [hpa] Temperature sensor Radiationresistant up to [J/kg] Conditioning of the components First outgassing at phytron TML [%] CVCM [%] FV option HV option option UHV-S ) - type K ) yes yes < <. UHV-G ) - type K ) yes yes < <. UHV-C option yes < <. UHV-C option yes < <. ) short-term ) Pt as an option 详情联系 :TEL 87 QQ:78

4 VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme Configuration guide START Size / Type Resol. Use bigger motor size Use motor with gear Select motor size { Preliminary assessment based on the required torque at max. speed (motor characteristics) and the available installation space. (Note: available voltage limits the max. speed) Is a full step resolution of.8 ( step motor) eugh? (The resolution can be increased by electronic control systems like micro step mode.) Duty Cycle DYNAMICS Current >.*IN is only needed for a short time? *) see derating formulas below yes yes yes yes yes yes { { { { Torque at the operating point (max. speed, max. load) at.*in current (current is proportional to torque)? (Background: overheating of the motor windings) For direct-drive (gearless motor): If external mass inertia <x to <x inertia of the rotor? (here you must accelerate with very long ramps in the micro step mode.) For direct-drive (gearless motor): High dynamics/acceleration required?: If external mass inertia <x to <x inertia of the rotor? For direct-drive and for motor gear units: Max. motor speed < rev./min? for dry lubrication < rev./min? (background: rotor heating) Motor (if necessary gear selection) is suitable Derating formulae Continuous operation without overheating at max. rev./min and.*i N. Short-term operating with higher current (I on ) is possible, depending on the duty cycle (ratio of t on to t off ). How long may the switch-on phase t on last? current I on.*i N How long will the break t off be? t on t off time What is the maximum value of the current I on during the switch-on phase? valid for speed <= rev./min; I N = minal current of the motor; I on >I N : over current feed 详情联系 :TEL 87 QQ:78

5 详情联系 :TEL 87 QQ:78 VSS data sheet Stepper Motor VSS 9 to VSS L g ØG I J ØG ØA ØG H D E F B F Dimensions / Electrical and Mechanical Characteristics Electrical Characteristics Mechanical Characteristics VSS Standard -steps lead parallel ) Current/ Phase IN Resistance/ Phase Inductivity/ Phase max. voltage AWG Holding torque Detent torque Rotor inertia axial Loads radial Mass Dimensions in mm A Ω mh V mnm mnm kg cm N N kg A B D E F F G G K L M N M M ) Holding torque in bipolar mode with parallel windings, two phases on at rated current ) other step resolutions on demand (with different mechanical characteristics!) All values given above refer to room temperature and atmospheric pressure. 详情联系 :TEL 87 QQ:78

6 VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme Stepper Motor with VGPL Gear VGPL to VGPL to Z P Y O B' X Key DIN 88 P Y O B' Th8 Uh U ø S øa øa' T U h8 h ø S øa øa' R Q R Q VGPL to VGPL to VGPL to W W W V V V Dimensions Gear Stepper motor VSS Dimensions in mm Mass A A B O P Q R S T U V W X Y (Motor and Gear) in kg VGPL 9/ M x VGPL 9/ / M.x VGPL / M x VGPL / M x -... VGPL / M x8 xx..7.8 VGPL / M x8 xx..... VGPL M x xx...9. VGPL M 8x xx VGPL M x 8x7x 详情联系 :TEL 87 QQ:78

7 详情联系 :TEL 87 QQ:78 VSS data sheet Gear Stepper motor Gear backlash ) Rated torque ) Gear inertia Radial load ) Axial load Efficiency at full load ) arc-min Nm kg cm N N % Reduction ratio i[:] Stage Stage Stage Stage VSS Stage Stage Stage VGPL / 9 / / 8 / 8 / 8 / 7 9 VGPL 9 / /..8.. / / 8 / / 8 / 9 / VGPL /.. / /.7.9 / 99. VGPL /...8 / 8 /.8 / 9 /. / 7 / 8 / / / 88 VGPL /. / / / / / / 8 / / 8. / 9.89 VGPL 7... /.. /..8 / 8 /.8 / 9 /. / 7 / 8 / / / 88 / VGPL /.8 / 8 /.8 / 9 /. / 7 / 8 / / / 88 / VGPL VPGL 8. /. /. / / / / / / /.7 9 / / 8 / / 8. / / / 8 / / 8. VPGL.7... /. / / / 9 / 8 / / 8 ) load ) center of the shaft ) in grease-lubricated operation ) for the frequency of the start-stop movements < per hour (otherwise please consider the shock factor) 详情联系 :TEL 87 QQ:78

8 VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme Stepper Motor with Resolver In comparison to other resolvers with variable differential rotary transformer, the resolvers R and R use a constant air gap. They are less sensitive to eccentricity and magnetic stray fields and can directly be connected to standard resolver-to-digital-(r/ D)- converters. The resolver is suitable for the use in fine, high and ultra high vacuum. R S C R S S S Electrical Characteristics Resolver Stepper motor A A C X Power supply [VAC] Frequency [khz] Primary impedance [ ] Secondary impedance [ ] Transformation ratio Rotor inertia [gcm ] A Mass [g] (Resolver) A X Motor with resolver RO Resolver Specification R R VSS VSS VSS VSS... 9 R VSS VSS VSS R VSS R VSS 8 8 R VSS R VSS ± % 9 9 详情联系 :TEL 87 QQ:78

9 详情联系 :TEL 87 QQ:78 VSS data sheet Resolver - Encoder Converter The position data converter controls automously the resolver sensor and converts the output signals of the resolver to incremental output signals (square wave signal). Resolution: increments Output reference signal: 8 V PP (diff.) ma max. khz Input SIN/COS: V PP (max.) Resolver transformation factor: K=. Supply voltage: V (... V DC ) Phytron ID: # 8 Resolver connection to the Converter: Pin Ref- Pin - Pin - Pin - Pin SIN+ Pin SIN Pin 7 Ref+ Pin 8 COS+ Pin 9 COS Screen PE NEW in 7-: The modular phymotion TM controller evaluates the resolver signals directly with the newly developed resolver evaluation module ECMS. Thermocouple Type K and Resistance Temperature Detektor Pt 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 only one motor phase is powered at any time), because the sensors are always mounted between the phases. Thermocouple element type K phytron uses with the Type K (NiCr-Ni) in-vacuum and cryo stepper motors, thermal elements in the temperature range from 7 to +7 C, accuracy class. The Type K is a metal thermal element with nickel-based alloy conductors. Temperature ranges, accuracy and characteristics of thermal elements for industrial use are defined in the IEC 8 standard (temperature measuring with thermal elements) The accuracy of the temperature measuring depends on the temperature of the reference point. Resistance temperature detector (RTD) Pt phytron uses Pt resistor sensors in in-vacuum and cryo stepper motors in the temperature range to + C. These precise sensors are used in extreme industrial and laboratory conditions. They consist of a wound resistance wire that is mounted and unsupported inside a cylindrical ceramic case The evaluation of the temperature measuring is possible with the corresponding module in the phymotion TM controller. For the K type variations to some degree are possible. 详情联系 :TEL 87 QQ:78

10 详情联系 :TEL 87 QQ:78 Extreme Option: Shaft design G H I Dimensions Stepper motor Dimensions in mm Typ G H I VSS9,, VSS VSS,, VSS VSS, 8 VSS VSS VSS VSS VSS 7,, 8, 详情联系 :TEL 87 QQ:78

11 详情联系 :TEL 87 QQ:78 VSS data sheet... T (U = 7 V) VSS 9..,.. T (U = 7 V) VSS.., PSHAFT (U = 7 V). PSHAFT (U = 7 V) T (U = 7 V) VSS.., 7..8 T (U = 7 V) VSS..,... PSHAFT (U = 7 V). PSHAFT (U = 7 V) S d[ / i ]. VSS..,. T (U = 7 V) VSS..,. T (U = 7 V). PSHAFT (U = 7 V) PSHAFT (U = 7 V) T (U = 7 V) VSS.., 8 7 T (U = 7 V) VSS.., PSHAFT (U = 7 V) 7 PSHAFT (U = 7 V) 详情联系 :TEL 87 QQ:78

12 VSS data sheet 详情联系 :TEL 87 QQ:78 Extreme 8 T (U = 7 V) VSS.., 8 T (U = 7 V) VSS.., 9 9 PSHAFT (U = 7 V) PSHAFT (U = 7 V) T (U = 7 V) VSS 7.., Torque [Nm]. VSS T (U = V). PSHAFT (U = V) PSHAFT (U = 7 V) Torque [Nm] VSS. Torque [Nm] VSS.. T (U = V) 8 T (U = V) PSHAFT (U = V) PSHAFT (U = V) 详情联系 :TEL 87 QQ:78

13 详情联系 :TEL 87 QQ:78 VSS data sheet Electrical Connection -lead bipolar control Standard A B C D yellow red W W blue green Windings parallel W W A B C D yellow red W W blue green Windings in series W W 8-lead unipolar or bipolar control Phase Phase A E G B C H F D yellow black brown red blue violett weiß grün W W W W Begin of the winding Ordering Code The variable elements of the product are displayed in colour. Type Size Step resolution Rated current Option E Option VPGL Vacuum class Options Ordering code VSS / VSH.., - E - VGPL / - HV - KTC Options Size 9 - Rated current (A/Phase),,, for VSS9 to for VSS9 to 7 for VSS bis 7 for VSS8 bis Option E E Double shaft double shaft Option VGPL VPGL xx/xx Low backlash gear: size / reduction ratio gear Admissible phase currents for identical power dissipation -lead motor parallel windings rated current Bipolar control mode Full step operation -lead motor series windings % of the rated current Vacuum class Options FV HV UHV-S UHV-G UHV-C UHV-C KTC Pt RS X Fine vacuum High vacuum Ultra high vacuum dry coated bearing Ultra high vacuum greased bearing Ultra high vacuum Cryo temperature down to fluid Nitrogen Ultra high vacuum Cryo temperature down to liquid Helium Thermocouple type K Resistance temperature detector Resolver customised 详情联系 :TEL 87 QQ:78

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