| Paper | Title | Page |
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WEPPC023 |
Bypass Modules for Solenoid Shunting of 2MeV Electron Cooler for COSY | |
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| Beam focusing correction of electron cooler for COSY is realized with a partial current intake from solenoid's winding using special shunts. Maximal shunting current is 20 A with a voltage drop on solenoid's coil in a range of 15-30 V. The dispersion of shunting current is 100 ppm for 10 hour operation. Energy taken from solenoid's winding recuperates to 100-240 VAC, 50/60 Hz line. | ||
| WEPPC027 | Correcting Magnet Power Supplies for the NSLS-II Booster | 500 |
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| Budkers Institute of Nuclear physics builds booster for syncrotron light source NSLS-II. Booster should accelerate electrons from energy 200 MeV to energy 3 GeV, acceleration phase duration is 250 ms, repetition rate – up to 2 Hz. Booster magnet system includes 16 sextuples and 36 dipole correcting magnets powered separately. Forth-quadratant current sources for sextuples and correcting magnets have maximum output current ±6 А, maximum output voltage ±100 V, maximim output current ripples and long-term stability are better than 0,1% relative to 6 A. In ramping mode with current slew rate up to 200 A/s time lag between setpoint and output current is not more than 1msec and can be compensated by software. Results of power supplies system tests and commissioning will be presented in paper. | ||
| WEPPC031 | 3-Channel Current Source with Channel Output Current up to 180 A and Output Voltage up to 180 V | 509 |
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| The presented report contains the description of 3-channel current source with channel output current up to 180 A and output voltage. Each channel can be operated and controled independently. The source consists of 2 part. First part is charging source with capasitance bank at output. And the second part is 3 current sources powered by a capacitance bank. The charging source is converter with IGBT switches, working with a principle of pulse-width modulation on programmed from 15 to 25 kHz frequency, with high power rectivier at output. The source output voltage is up to 180 V, peak power is 40 kW and average power is 20 kW. Capacitance bank has 120 kVA storage energy. Second part contains 3 independent current sources with up to 180 A output current each. Each current source consist of H-bridge 2-quadrant convertor with MOSFET switches working on 50 kHz frequency and tho output LC filter. The controllers of the sources is developed with DSP and PLM, which allows optimizing operations of the sources. The controllers are connected by internal control network for more flexibility and efficiency. The description of the source and the test results are presented. | ||
WEPPD027 |
Stepping Motor Drive Systems for Accelerator Technology | |
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| BINP SB RAS is developing various stepping motor drive devices for many years in accordance with requirements of acceleration and storage facilities. During this time several types of electric drives to control stepping motors with a 2-6 phases were developed. Electric drives are handled by special CANbus controller developed in BINP with smooth stepping motor acceleration and deceleration. Also special program was written to simplify adjustment of positioning system, this program allows operating using PC's Universal Serial Bus. | ||