MCOR12 System

​4 Quadrant Bipolar Power Supply

Features and Advantages

• Precision regulated bipolar output provides up to +12 to -12 Amps for Magnet loads.
• Scalability – eight different MCOR models which are very adaptable to different magnets power requirements: MCOR 1, 1.5, 2, 6, 7.5, 9, 12, 30 Amp Modules​.
• Modularity – can accommodate up to 16 ea. MCOR12 modules, and/or 8ea. MCOR30 modules in one MCOR Crate.
• A single bulk power supply provides the main DC power for all modules in the crate.
• New Digital Controller - EMCOR with embedded IOC.
• ​Recently redesigned output Amplifier increases switching frequency from 20Khz to 96Khz, improves response, reduces ripple, and improves performance and reliability.
• A single 6U crate can house up to 16 MCOR Power Modules controlled by a single controller. All Power Module models can be mixed and/or matched in a single crate.
• Smooth operation through zero amps output current, no “Crossover” problems​.
• All MCOR Power Modules of a particular model are identical and interchangeable, and can be used in any application within its ratings.
• MCOR Power Modules have two high precision measurements of output current; one is used to close the regulation control loop and the other provides an independent monitoring signal. Both measurements are monitored by the EMCOR Controller module.
• Fault sensing circuitry in the module sets a Fault Latch which inhibits and disables the output when a fault condition is present.
• Low noise output.
• Current Stability 60ppm over 8 hours.
• Proven Reliability at LCLS-I and LCLS-II and other collaborating National Labs.

General Description​
The MCOR12 System is a 16-channel precision magnet driver and is available in 7 different models. Each model of MCOR is capable of providing bipolar output currents in the range from 1amp to 12amps (See table 1 below). The output current can be ramped smoothly through zero. A single, unregulated bulk power supply provides the main DC power for the entire crate containing 16 slots. Each slot may contain one MCOR module of any of the 7 models shown for each of the 16 slots. The entire crate of modules can be controlled by a single EMCOR - Digital MCOR Controller, that resides in slot 00 (the left most slot) of the crate. The EMCOR module contains four DACs, each of which supplies 4 separate output voltages for controlling the 16 available slots with 16 bit resolution. Software is available to control each of the MCOR modules via either a USB or Ethernet interface. If a higher value of bipolar current is required the MCOR30 model is available, which can deliver -30A to +30A.

Table 1

Model 2510

MCOR12   System Diagram

The MCOR System contains one 6U Crate Assembly, up tp 16 MCOR Power Modules, the EMCOR Controller Assembly, A Blower Assembly, and a single Bulk Power Supply.

MCOR12   8 Hour Stability Test

Note:
BiRa Systems calculates stability using the absolute maximum and minimum values from the complete set of data. Care should be taken when comparing stability specifications from different manufacturers, as some manufacturers calculate stability using different methods such as full width at half maximum (FWHM). The FWHM calculation will result in a lower stability number and should not be compared directly to the absolute max/min technique.

Programming Module (PGM)
​Each magnet design has a unique inductance and frequency characteristic, and in addition each corrector installation has a unique cable plant resistance and maximum current rating. In order to provide “custom tailored” service to each corrector magnet, yet retain a high degree of modularity and consistency in the driver design, each MCOR model power module accommodates a small programming module - PGM. This module contains a set of passive components that match several important characteristics of power module to its corrector magnet.
The PGM module shown below is for an MCOR12 module. Each MCOR model type will have its own unique PGM module.

MCOR Crate
​
The MCOR Model 2513 is a 19” rack mounted 6U x 220 mm crate. The crate has 17 slots: 16 (slot 0 thru 15) for the removable power modules (MCOR12 and MCOR30). Slot 00 (left most slot) houses the EMCOR controller module. The control slot employs two 96-pin VME connectors and the 16 power slots have single 48-pin connectors on the backplane to achieve a modular architecture. 
The MCOR power modules slide into standard card rails and two locking extractor handles hold each module in place. The power modules are accessed by twisting three 1⁄4 turn captive fasteners and lowering a single hinged clear lexan front cover. The crate's front cover provides safety during operation and a positive air flow for cooling from the separate MCOR Blower Assembly.
For more information see MCOR Crate Datasheet.

Fault Monitoring
The following conditions will inhibit operation of the MCOR modules as described below:

• External Inhibit- Inhibits MCOR operation and displays a red LED fault when crate interlock (J1 on crate back panel) is open.
• Over-temperature- Inhibits MCOR operation and displays a red LED fault when amplifier temperature exceeds approximately 70°C.
• PGM module interlock- Inhibits MCOR operation and displays a red LED fault when PGM module is not installed.
• Output short to ground- Fault condition exists when either the + or - output is shorted to ground, prohibiting MCOR operation and displaying a red LED fault.​

Additional Information:
MCOR 1 and MCOR 2 Bulk Supply inputs are limited by a 3A fuse.  All other MCOR models use a 20 amp Bulk Supply input fuse. Fuse blows when input from bulk supply exceeds 3 amps (MCOR 1 and MCOR2) and 20 amps for all other MCOR models.

Applications

• Particle accelerator beams
• Medical Accelerators
• Laboratory test and measurement
• Testing magnetic and inductive devices
• Battery testing
• Solar-cell testing 

MCOR12 Technical Specifications

Note that the specifications below assume the EMCOR module as controller and the 2516 current amplifier module is installed  on the MCOR module. The 2516 current amplifier is the latest generation amplifier.

Note 1-High Voltage Option with Higher Bulk Supply Operating Voltage available on request

 MCOR 12 Manual
View  MCOR Published Papers