Follow @kepco_careers
Advanced Search
Kepco Power Solutions
718-461-7000
Kepco has introduced an option (identified by suffix L) to optimize 200W and 400W BOP models for driving inductive loads (also referred to as magnet power supplies). This option makes the BOP more suitable for a wide variety of applications such as motor testing, testing of magnetic components (coils, speakers, etc.), industrial applications with inductive loads, driving CRT coils, cryogenic applications and powering correcting magnets for medical imaging applications or particle accelerators.

BOP L option (magnet power supply) units are designed to operate in a stable manner in Current or Current Limit Mode for loads up to 1 Henry. They are also stable with any R-L series load combination.

All specifications of the BOP L option unit (magnet power supply) in voltage mode are unchanged from the standard model. All specifications listed below are for L option (magnet power supply) models in Current Mode. All other specifications are identical to the standard BOP.

In current mode the bandwidth of the L option (magnet power supply) BOP is reduced modestly when operating with a resistive load. Correspondingly, the rise and fall time of the unit is increased somewhat (model dependent). Further, it is possible to reduce the bandwidth in current mode in a predictable way, using one customer installed component on the rear programming connector of the BOP.

For higher power BOP models (magnet power supplies) optimized for inductive loads, see Kepco's 1KW BOP-GL Series.

BOP INDUCTIVE LOAD SPECIFICATIONS
MODEL (1) Bandwidth (2) (DC to f -3dB) Rise/Fall
Time (3)
Recovery at
Step Load
Time Constant(4)
Load Effect
Nominal Resistive Load (5)
Resistive Load,
Nominal
Inductive
Load, 2mH
100 WATT MODELS
BOP 5-20DL
0 to ±5V, 0 to ±20A
3.9 KHz 55 Hz 90µS 100µS 3 ppm/Hz
BOP 20-5ML, DL
0 to ±20V, 0 to ±5A
6.4 KHz 2.3 KHz 55µS 380µS 12 ppm/Hz
BOP 50-2DL
0 to ±50V, 0 to ±2A
1.6 KHz 2.6 KHz 215µS 275µS 6 ppm/Hz
200 WATT MODELS
BOP 5-30DL
0 to ±5V, 0 to ±30A
3.5 KHz 32 Hz 110µS 130µS 2 ppm/Hz
BOP 20-10ML, DL
0 to ±20V, 0 to ±10A
6.4 KHz 2.3 KHz 55µS 380µS 12 ppm/Hz
BOP 36-6ML, DL
0 to ±36V, 0 to ±6A
3.9 KHz 1.5 KHz 90µS 123µS 6 ppm/Hz
BOP 50-4ML, DL
0 to ±50V, 0 to ±4A
1.2 KHz 1.5 KHz 300µS 330µS 20 ppm/Hz
BOP 72-3ML, DL
0 to ±72V, 0 to ±3A
4.5 KHz 4.5 KHz 80µS 200µS 28 ppm/Hz
BOP 100-2ML, DL
0 to ±100V, 0 to ±2A
2.2 KHz 3.1 KHz 160µS 400µS 47 ppm/Hz
BOP 200-1ML, DL
0 to ±200V, 0 to ±1A
1.2 KHz 2.0 KHz 250µS 300µS 0.017%/Hz
400 WATT MODELS
BOP 20-20ML, DL
0 to ±20V, 0 to ±20A
10.0 KHz 2.5 KHz 35µS 190µS 3 ppm/Hz
BOP 36-12ML, DL
0 to ±36V, 0 to ±12A
10.0 KHz >5.4 KHz 35µS 125µS 3 ppm/Hz
BOP 50-8ML, DL
0 to ±50V, 0 to ±8A
3.5 KHz 1.6 KHz 100µS 660µS 7 ppm/Hz
BOP 72-6ML, DL
0 to ±72V, 0 to ±6A
2.1 KHz 2.2 KHz 155µS 250µS 50 ppm/Hz
BOP 100-4ML, DL
0 to ±100V, 0 to ±4A
1.6 KHz 2.3 KHz 220µS 280µS 70 ppm/Hz

(1) All specifications listed are for inductive load models in Current Mode.
      All other specifications are identical to the standard BOP.
(2) Bandwidth specifications for units with GPIB control are somewhat reduced. Consult factory for details.
(3) 10% - 90%, Short-circuit.
(4) Short-circuit, Nominal Resistive Load.
(5) Load effect increases nonlinearly with frequency from the typical 0.5 mA in DC full scale
      (same as the standard unit) with the average rate listed.

If the load impedance at the working frequency multiplied by the peak value of current equals the voltage limit setting, it is recommended that the output voltage be kept below the voltage limit setting to avoid inducing a large distortion of output current. If the voltage limit is reached, the unit’s bandwidth can be reduced by connecting an external film capacitor between pins 16 and 18 of the unit's programming connector (PC 12). The table below shows the effect that adding the external capacitor has on the 3dB bandwidth for resistive, resistive-inductive or inductive loads, with less than 10% tolerance (excluding the capacitor tolerance).

BOP INDUCTIVE LOAD BANDWIDTH CORRECTION
MODEL External Capacitor
(Across pins 16 and 18 of PC 12 Programming Connector)
0.01µF 0.02µF 0.05µF 0.1µF 0.2µF 0.5µF 1µF
100 WATT MODELS
BOP 5-20DL 2.6 KHz 1.8 KHz 0.9 KHz 0.5 KHz 0.25 KHz 0.12 KHz 0.06 KHz
BOP 20-5ML, DL 2.4 KHz 1.3 KHz 0.6 KHz 0.3 KHz 0.15 KHz 0.06 KHz 0.04 KHz
BOP 50-2DL 1.4 KHz 1.12 KHz 0.67 KHz 0.44 KHz 0.25 KHz 0.11 KHz 0.06 KHz
200 WATT MODELS
BOP 5-30DL 2.6 KHz 1.8 KHz 0.9 KHz 0.5 KHz 0.25 KHz 0.12 KHz 0.06 KHz
BOP 20-10ML, DL 2.4 KHz 1.3 KHz 0.6 KHz 0.3 KHz 0.15 KHz 0.06 KHz 0.04 KHz
BOP 36-6ML, DL 0.9 KHz 0.6 KHz 0.3 KHz 0.15 KHz 0.08 KHz 0.03 KHz 0.02 KHz
BOP 50-4ML, DL 1.2 KHz 1.0 KHz 0.6 KHz 0.4 KHz 0.21 KHz 0.09 KHz 0.05 KHz
BOP 72-3ML, DL 2.7 KHz 1.7 KHz 0.8 KHz 0.52 KHz 0.27 KHz 0.12 KHz 0.06 KHz
BOP 100-2ML, DL 1.1 KHz 0.9 KHz 0.5 KHz 0.32 KHz 0.17 KHz 0.07 KHz 0.04 KHz
BOP 200-1ML, DL 0.84 KHz 0.78 KHz 0.50 KHz 0.31 KHz 0.21 KHz 0.10 KHz 0.05 KHz
400 WATT MODELS
BOP 20-20ML, DL 3.3 KHz 2.0 KHz 0.8 KHz 0.48 KHz 0.25 KHz 0.1 KHz 0.06 KHz
BOP 36-12ML, DL 4.0 KHz 2.4 KHz 1.0 KHz 0.57 KHz 0.27 KHz 0.11 KHz 0.06 KHz
BOP 50-8ML, DL 1.2 KHz 0.7 KHz 0.31 KHz 0.18 KHz 0.1 KHz 0.04 KHz 0.02 KHz
BOP 72-6ML, DL 1.4 KHz 1.1 KHz 0.6 KHz 0.38 KHz 0.21 KHz 0.09 KHz 0.05 KHz
BOP 100-4ML, DL 1.3 KHz 1.1 KHz 0.8 KHz 0.5 KHz 0.3 KHz 0.15 KHz 0.08 KHz

PREVIOUS TOP NEXT

ProductsSupportLiteratureContact UsCareersAbout

KEPCO, INC. • 131-38 SANFORD AVENUE • FLUSHING, NY. 11355 U.S.A.
TEL (718) 461-7000 • FAX (718) 767-1102
www.kepcopower.com • email: hq@kepcopower.com