1. Beam Wire Scanner for PS/SPS/PSB Motor Selection Dmitry Gudkov BE-BI-ML

2.  Electric Motor Requirements  Suppliers and models  Test bench status  Definition of inertia at final design phase  Conclusions Contents

3. Electric Motor Requirements New motor will be the same in beam wire scanners for PS/SPS/PSB so should provide torque sufficient to accelerate the wire to linear speed 20 m/s in both configurations: 182.5 mm (PS/SPS) and 150 mm (PSB) mm forks; The desired motor should be based on the standard market solution which will be available for many years; The rotor will be located in vacuum and must be vacuum compatible; the use of any glue, other adhesives or insulating materials is not possible. Solid core rotor should be used. The moment of inertia of the rotor should be minimized in order to reduce the required acceleration torque; Features for mounting the rotor on the shaft (key-slots, holes, etc.) should be considered in the design; *-values will be optimized during the next mechanical design phase * - The motor currently used is obsolete and will not be available for purchasing ParameterValueNotes Motor typeFrameless PMSMPermanent Magnet Synchronous Motor Rotor core materialSteel (should be approved by CERN) Permanent magnets materialSamarium-Cobalt (Sm 2 Co 17 ) Wire linear speed, m/s20 Angular speed, rad/s110 (PS/SPS)133 (PSB) Acceleration, rad/s 2 10672 (PS/SPS)15711 (PSB)Sin-profile is used, spec. coefficient 1.85 Inertia of the load, kg x m 2 8.6E-04* (PS/SPS)7.29E-04* (PSB) Radial air gap (stator ID – rotor ED), mm0.7 Ionizing radiation dose, kGy/year1

4. Potential suppliers and models SupplierModelRotor Inertia, kg x m 2 Peak torque, N x m Required torque PS/SPS, N x m Required torque PSB, N x m Dimensions, d ir xD er xD es xL r ETELTMM140-0309.98E-0438.2019.8327.1360x88x143x31 Allied Motion HT050039.40E-0431.2919.2126.2264x78x122x62 Alxion145STK2M1.28E-0355.0020.0727.4856x??x145x86 KollmorgenKBM-35X022.50E-0358.435.8650.7365x??x140x76 ParkerNK6209.80E-0426.6018.6325.5726x71x111x60 Motion Control B13-76 7E-0426.5016.6522.4558x??x127x76 Not interested because of small quantity requested Did no reply Interested, made rotor banding test, quotation by 26.06 Interested, quotation received Interested, waiting new technical information by 26.06 Not interested (no experience with glue-less rotors) 3 companies are interested SupplierModelRotor Inertia, kg x m 2 Peak torque, N x m Required torque PS/SPS, N x m Required torque PSB, N x m Dimensions, d ir xD er xD es xL r xL s ETELTMM140-0309.98E-0438.2019.8327.1360x88x143x31 Allied Motion HT050039.40E-0431.2919.2126.2264x78x122x62 Alxion145STK2M1.28E-0355.0020.0727.4856x??x145x86x119 KollmorgenKBM-35X022.50E-0358.435.8650.7365x??x140x76x109 ParkerNK6209.80E-0426.6018.6325.5726x71x111x60x106 Motion Control B13-76 7E-0426.5016.6522.4558x??x127x76

5. Supplier – ModelPrice for prototype, EUR Price for series, EUR Additional cost Delivery time, weeks Total, prototype x1 Total, prototype x2 Parker - NKD620EKxR10003154-1031546308 Kollmorgen - KBM-35X02529435663700 (NRE)16899414288 Alxion - 145STK2M52501860270014795013200 Alxion - 145STK4M57102280290014861014320 Potential suppliers and models. Prices Parker - NK620 Rotor banding (done by Alxion) Supplier – ModelPrice for 1, EURPrice for 2, EUR Parker - NKD620EKxR1000--- Kollmorgen - KBM-35X0210782157 Alxion - 145STK2M27104060 Alxion - 145STK4M31504880 Delivery time for standard models: Alxion – by 30.10; Kollmorgen – app. 7 weeks. baseline

6. Test bench status CompanyModelP.O. sentDelivery expected Alxion145STK2M1C020S (standard)DELIVERED KollmorgenKBM-35H02-C00 (standard)DELIVERED Alxion145STK2M - customisedDELIVERED Kollmorgen motor test bench:Alxion motor It was decided to order 3 motors for qualification. All of them have been delivered. 2 Test benches were designed, produced and assembled for qualification tests. Test benches are ready for electromechanical tests.

7. Definition (update) of inertia at final design phase (Dec-15) Moment of inertia for the shaft and components installed on it ComponentJ % of load Bearing 11.96E-05 0.80% Bearing 22.45E-06 0.10% Optical disk2.36E-04 9.62% Nuts on the shaft1.20E-04 4.89% Fork with fixation ring and screws8.25E-05 3.36% Fork with fixation ring and screws8.25E-05 3.36% Resolver1.12E-05 0.46% Magnetic lock6.61E-05 2.69% Rotor (Alxion)1.28E-03 52.15% Shaft5.54E-04 22.57% TOTAL 2.45E-03100% MotorTc, NmJr, kg.m 2 Jtotal R2Peak torqueRequired torque, Nm % of peak torque% left Alxion 145STK2M14.61.28E-032.45E-035538.5670%30% Kollmorgen KBM-35X0217.52.50E-033.67E-0359.2 57.7398%2% Optical disk can be optimised to reduce the total inertia by several % + other components can be optimised (lock nuts material; forks)

8. Conclusions Inertia of the load has changed during the design phase (8.6E-4 before; 1.11E-3 now). Updated BWS structure inertia load requires around 70% of the baseline motor (Alxion - 145STK2M) peak torque. Qualification is planned and the test bench is ready for electromechanical tests. Further purchase of motors is planned after electromechanical tests are completed.

9. Thank you for your attention! Questions? …Discussion...

10. Extra slides

11. 3 different lengths of the fork have been considered: Option 1: R1 = 182.5 mm Option 2: R2 = 150.0 mm Option 3: R3 = 100.0 mm Length of the fork, m Linear speed of the wire, m/s Angular speed of the wire, rad/s Acceleration (constant), rad/s^2 Peak acceleration (variable profile, k=1.85*), rad/s^2 Option 1 (R1)0.18220110579010711.5 Option 2 (R2)0.15020133847115671.4 Option 3 (R3)0.100202001910835350.0 Angular speed and acceleration * - the coefficient used for calculations of the peak acceleration by C. Grosjean

12. Moment of inertia of the shaft and components installed on it (based on data from S. Samuelsson) Component Bearing 11.96E-05 Bearing 22.45E-06 Disc1.45E-04 Disc holder2.01E-05 Fork with fixation ring and screws1.56E-049.03E-053.81E-05 Fork with fixation ring and screws1.56E-049.03E-053.81E-05 Resolver4.00E-06 Magnetic lock6.61E-05 Rotor3.46E-04 Shaft2.91E-04 1.21E-031.07E-039.70E-04 Summary table of calculated data for torque and acceleration Length of the fork, mRequired torque, Nm Peak acceleration*, rad/s^2 Option 1 (R1)0.18212.9610711.5 Option 2 (R2)0.15016.7715671.4 Option 3 (R3)0.10034.3135350.0 * - calculated by multiplication of constant acceleration by k = 1.85