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EMMA Electrical Engineering

www.4gls.ac.uk/ERLP.htm. EMMA Electrical Engineering. July 06 EE & PS Group. EE & PS Group – EMMA 06. EE & PS Group – EMMA 06. www.4gls.ac.uk/ERLP.htm. Electrical Engineering - Overview. Specification, Assembly & Installation Power Converters Motion Control Electrical Distribution

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EMMA Electrical Engineering

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  1. www.4gls.ac.uk/ERLP.htm EMMAElectrical Engineering July 06 EE & PS Group EE & PS Group – EMMA 06

  2. EE & PS Group – EMMA 06 www.4gls.ac.uk/ERLP.htm Electrical Engineering - Overview Specification, Assembly & Installation • Power Converters • Motion Control • Electrical Distribution Assembly & Installation • RF System • Vacuum & Control • Personnel Safety • Beam Diagnostics

  3. EE & PS Group – EMMA 06 www.4gls.ac.uk/ERLP.htm Unipolar DC Power Converters Electron Ring Option 1 – 42 F magnets series connected & 42 D magnets series connected. 2 power converters required – Used for costings Option 2 – 42 F Quad magnets in series + 2 sets of 21 D Quad magnets in series. 3 power converters required Transfer Line 9 Quad magnets all individually powered, plus 1 dipole. 10 power converters required Diagnostic Line 4 Quad magnets all individually powered. 4 power converters required

  4. EE & PS Group – EMMA 06 www.4gls.ac.uk/ERLP.htm DC Power Converters Specification Specification Required: Stability ±100ppm (Commercially available units tested to better than ± 50ppm) Resolution 15ppm (Set by DL control system – DAC for ERLP) Improved performance will increase costs A Bipolar correctors design is available and can be built at DL

  5. EE & PS Group – EMMA 06 www.4gls.ac.uk/ERLP.htm Pulse Power Converters Two Pulse power supplies are required: Injection Kicker Extraction Kicker Actual ratings and performance need to be specified It is anticipated that these can be achieved with semiconductor switches Similar design to that used on the SRS

  6. EE & PS Group – EMMA 06 www.4gls.ac.uk/ERLP.htm Motion control requirements • 84 axes for magnet adjustment. • 21 axes for RF phase shifters • 5 ancillary • Magnets require +/-12mm of motion with a 5 micron accuracy. • 1mm linear ballscrew with 400 step/rev provides 2.5 micron steps

  7. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Position Control Feedback Options 1. Closed loop encoder feedback. 2. Open loop with position information e.g. Sylvac probes 3. Open loop without feedback. 1. Closed loop control has the advantage of continually correcting position but is the most expensive option. High speed non-contact position feedback utilising tape scale linear encoders can easily provide resolutions of better than 5 µm. The encoder highlighted is compact and easy to install and set-up. Accuracy to ±1 µm/m,. Bi-directionally repeatable optical reference mark

  8. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Position Control Feedback cont’d 2. Open loop with position information e.g. Sylvac probes A less expensive option - However it may require more software or controls interfacing which may offset any cost saving. 3. Open loop without feedback We are currently investigating a stepper controller which operates stepper motors in a closed position loop without position sensors

  9. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Stepper Motors • High energy Neodymium magnets for increased performance • 50% more torque than conventional hybrid types • Choice of single or double shaft options • High quality & Economical prices • 8 leads provide the choice of Uni-polar or Bi-polar operation

  10. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Electrical Distribution • The ERLP distribution system has spare capacity which will be used for EMMA. • 2 new distribution boards to be installed close to the rack positions. • 1 distribution board will be dedicated to the RF racks. • 1 distribution board will provide all other EMMA supplies. • A cable route from the ERLP distribution in the Tower basement to the new EMMA distribution boards is required. This will require diamond drilling.

  11. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Cable Management • Overhead cable routes from racks into the centre of EMMA ring • 3 levels of cable tray within the EMMA ring • Level 1 - magnet cables • Level 2 – controls cables • Level 3 – mains supplies

  12. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Rack Requirements ERLP Rack room is fully populated, but even if available would require long cable lengths Number of Racks required: • Motion Control 2 • Power Converters 2 • Diagnostics 1 • RF Auxiliary 3 • Vacuum / Controls 3 Total 11 An alternative location for the racks is required possible within the Experimental area RF Amplifier Systems may require an additional 7 double racks

  13. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Power Converter & Control racks Location Area available for controls and power converter racks ? Gantry solution preferred

  14. www.4gls.ac.uk/ERLP.htm EE & PS Group – EMMA 06 Power Converter & Control racks Gantry Typical Rack Gantry Required to house the Electrical equipment 7.5m 7.5m

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