PLS Power Supply control and upgrade plan

actuallyabandonedΗλεκτρονική - Συσκευές

15 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

263 εμφανίσεις

Pohang Accelerator Laboratory

POSTECH

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

EPICS collaboration meeting 2004

Dec

8
-

10 , 2004 RICOTTI, Tokai,
JAPAN

Pohang Accelerator Laboratory

Kiman Ha, M.Y.Oh, J.H Kim, J.M Kim and J.H Choi

hkm@postech.ac.kr

PLS Power Supply control and upgrade plan

Pohang Accelerator Laboratory

POSTECH

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Outline

-
Status of orbit feedback

-
Present status of power supply control

-
Digital power supply upgrade plan

-
Hardware review and test result

-
Summary

Pohang Accelerator Laboratory

POSTECH

Orbit feedback status

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

-
Orbit feedback operation started for user service in
November

-
Orbit stability with feedback(RMS)

-

short term (1 hour) : < 1

m

-

long term (12 hours) : < 3

m


-
Both V and H corrector PS’s are involved for feedback

Pohang Accelerator Laboratory

POSTECH

Present PS upgrade status

-
Upgrade status


.Kept vertical Orbit Stability less then 3

m

by
feedback operation


.Replaced 22 sets of Corrector PS and their Control
system in September


-
EPICS Control and embedded controller


.Collaboration with BESSY
-
II (
Ralph,
Ingo) and
Kristi(SLAC)



.Same as BESSY
-
II, 24Bit DAC Controller


.CAN
bus

field bus with EPICS IOC


.Event System for PS time synchronization

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Pohang Accelerator Laboratory

POSTECH

Next plan of power supply upgrade

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

-
Requirements of corrector PS


.
Fast Corrector control system(>1kHz)


.
Vertical PS need 20bit of step resolution


.
Horizontal PS need 16bit step resolution

-
2005, will replace all vertical PS

.
2ppm step resolution

.
+/
-
10ppm long term stability

-
Feed
-
forward for ID gap changed


.
Install steering magnet



.+/
-
5A 16bit 1kHz bandwidth PS

Pohang Accelerator Laboratory

POSTECH

Fast Control System requirement

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

-
PS : >1kHz BW, > 18bit output resolution

-

1 to 5kHz set point

-
Event system synchronization


>BPM measurement


>PS control trigger

-
Fast beam position and feedback algorithm processing




Pohang Accelerator Laboratory

POSTECH

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Background of Digital PS development

-
Implementation of modern power converter technology


.Resent DSP&FPGA show very powerful performance

-
Requirements of beam physicists for orbit stabilization



.Slow, fast, and epics based robust control system

-
High speed control applications: >4kHz

-
High output resolutions: >18bit

-
Low cost and small number of hardware components



.Reduce error source


.Easy maintenance

Pohang Accelerator Laboratory

POSTECH

Digital Controller Advantage

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

-
Modern digital technology(DSP, FPGA,ADC)

-
Cost effective and precise power supply

-
High flexibility and modularity

-
High functionality

-
Built in all functions for PS


.Current regulator(PI, feed forwarder)


.Direct PWM generation


.Fast control port


.Analog, Digital I/O

Pohang Accelerator Laboratory

POSTECH

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Analog
-

Digital
-

Converter

8 Analog Input

2 Analog Output

DSP
-
controller

incl. FPGA

16 Bit Digital
Out

8 bit Digital
Input

1 RS232

1 Fiber optics

Digital Control Unit

Pohang Accelerator Laboratory

POSTECH

Block diagram of
Controller Card

without software functions

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

From PSI Lukas

Security

controller


(Watchdog)

24
V

5
V

BUS

SHARC

DSP

ADSP
-
21065L

SRAM

2

MBit

FLASH EPROM

8

MB
it

Flags, IRQs, Reset

EPROM

FPGA

CLOCK

60/30/20MHz

Control
-
IO serial link

RS 232

Power

Inverter Section

Analog & Digital

Signal

Feedback PWM

PWM signal

PWM synchronisation

SoC / SPARE / ADC clock (200 kHz)

Service

PC

SPORT 1 (serial port)

SPORT 0 (serial port)

Power

Monitor

Reset

PWM

generator

IO
-

controller

ADC/DAC

Card

Trigger /Reset /Interrupt

Backplane

D SUB 15

Control

System

(EPICS)

optic

FPGA

fast optical input for Trigger /Reset /Interrupt

DC

DC

other

DSP

Controller

Cards

Analog Sig.

JTAG

digital Input / Output

optic

Timer

Pohang Accelerator Laboratory

POSTECH

Prototype of Digital PS for PLS

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Filter

IGBT driver

DCCT

Power Stack

DSP

RS232

ADC

Optical fiber for EPICS interface

.+/
-
100A

.DC 30V

Pohang Accelerator Laboratory

POSTECH

IOC control test

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Fiber optics


VIPC664


TM

Digital PS

IOC

Test panel

Pohang Accelerator Laboratory

POSTECH

IOC and PS configuration

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

VME

CPU

Carrier module

TM module

PS

IP
-
A

IP
-
B

IP
-
C

IP
-
D

Optical fiber link

MVME5110

VIPC664
-
TM

Event trigger

CH1

CH2

PS

PS 1

PS 8

PS 2

EVR

Pohang Accelerator Laboratory

POSTECH

Control hardware components

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

VIPC664
-
TM

IP2

TM

Pohang Accelerator Laboratory

POSTECH

Step response test

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

55.0A

55.0001

55.0002

+55.0003

55.0005

55.0004

55.0A

Step response @55(A), 100uA step(1ppm)

1ppm

@ full range

V*10 is Amps

Pohang Accelerator Laboratory

POSTECH

Summary

-
The PLS orbit feedback operation is based on EPICS
control system.

-
CAN
bus

IOC and control are working well without any
problem


-
Satisfactory result of prototype Digital controlled PS

-
Next Digital PS will be operated for orbit feedback


-
This high performance PS technology will be helpful for
our new project, 4
th

generation PAL
-
XFEL

EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

Pohang Accelerator Laboratory

POSTECH

Overview


EPICS
Collaboration
Meeting 2004 @
RICOTTI, Tokai, JAPAN

PLS(Pohang Light Source) has successfully upgraded storage
ring straight section 20bit power supplies and control system
for global orbit feedback operation in collaboration with
BESY
-
II.


Now we are looking for EPICS based fast control system and
cost effective precise digital controlled power supply in
collaboration with PSI and DIAMOND.


I will present the current status of PLS global orbit feedback
system, and experimental results of 1ppm resolution digital
controlled power supply for the next upgrade of PLS.