• DOSF series
  • DOSF series

Ultra High Speed
Bipolar Power Supply

  • Voltage range: ±20V to ±60V
  • Power: 150W to 2000W
  • Frequency bandwidth:
    DC to 200kHz
  • Function generator as standard

Ultra fast response Four-quadrant bipolar power supply with function generator

DOSF series is equipped with a built-in function generator enabling its compact size and ultra-fast response. Any waveform can be programmed easily from the front panel, and it features memory settings and protection functions. With communication options, external control is available. You can use this DOSF series as an ultra-high-speed bipolar amplifier enabling an external signal input.

Note: We do not design this bipolar power supply for charging and discharging batteries.
For batteries charge and discharge application, please refer to the Battery Cycle Tester product page.

Features and Benefits

  • Ultra fast response of DC to 200 kHz
  • Function generator as standard
  • Waveform with less distortion by DDS method (DC to 200 kHz sine wave, square wave and triangular wave)
  • Individual setting of DC/AC output and CV/CC mode, making the unit user-friendly with simple operability (DC to 200 kHz in CV mode and DC to 100 kHz in CC mode for sine wave, square wave, and triangular wave)
  • External control with communication options (USB, LAN, RS-232C, RS-485, and GPIB)
  • High legibility with LCD display using high contrast white LED backlight
  • Up to 6000W with Master/Slave operation

Applications

  • Driving capacitive load (capacitors)
  • Biasing inductive loads (coils, transformers, etc.)
  • Various motor testing
  • Power conditioners
  • Evaluation test for solar panel related devices
Output range

Models

* Consult with our sales of fice about different specifications from the following list.

Model Output
Voltage Current Power
DOSF20-7.5 ±20 V ±7.5 A 150 W
DOSF20-15 ±15 A 300 W
DOSF20-30 ±30 A 600 W
DOSF20-60 ±60 A 1200 W
DOSF20-100 ±100 A 2000 W
DOSF25-6 ±25 V ±6 A 150 W
DOSF25-12 ±12 A 300 W
DOSF25-24 ±24 A 600 W
DOSF25-48 ±48 A 1200 W
DOSF25-80 ±80 A 2000 W
DOSF45-3.3 ±45 V ±3.3 A 150 W
DOSF45-6.6 ±6.6 A 300 W
DOSF45-13.3 ±13.3 A 600 W
DOSF45-16 ±16 A 720 W
DOSF45-26.7 ±26.7 A 1200 W
DOSF45-44.4 ±44.4 A 2000 W
DOSF60-2.5 ±60 V ±2.5 A 150 W
DOSF60-5 ±5 A 300 W
DOSF60-10 ±10 A 600 W
DOSF60-20 ±20 A 1200 W
DOSF60-33.3 ±33.3 A 2000 W

Functions

Basic wave generation

DOSF is equipped with a built-in function generator that produces basic waves such as sine, rectangular, and triangle waves. The frequency range can be set between 1 Hz and 200 kHz. You can adjust amplitude; starting phase (for sine wave), switching/cutoff phase (for sine wave), and duty ratio (for rectangular/triangle wave).

Starting phase graph of initial phase
Switching phase graph of switching phase
Interruption phase graph of cutoff phase

Application

Power activation test, Inrush current measurement, waveform fluctuation test

Sequence functions *

The DOSF series is equipped with programmable sequence functions such as step length, step amplitude ramp, ramp, CV/CC mode, frequency sweep, AC superposition, step jump, and jump times. These useful functions help to program the desired waves in very flexible manner, enabling to support efficient laboratory and research works.

  • Setting length: 10 ms to 1999 s 999 ms (resolution: 1 ms), ramp and AC waveform is 50 ms
  • Up to 16 steps can be set and saved plus three programs per program.
  • Can be set CV/CC mode per program
  • Frequency: Infinite, 1 to 999
Program image
Program image

Sequence functions help to create complicated waves like below to be simply and easily edited.

Pulse current variation Pulse current variation
Ripple current superposition Ripple current superposition
AC voltage fluctuation AC voltage/ frequency variation
DC voltage interruption DC voltage interruption

Applications

Testing of motors, pulse power supply and various evaluation

* If amplifier is output cuts off while it is running a sequence program half-way-through, the leftover sequence will not run but it is re-activated from the beginning of the original sequence.

Measurement functions

The DOSF series is equipped with programmable sequence functions such as step length, step amplitude ramp, ramp, CV/CC mode, frequency sweep, AC superposition, step jump, and jump times. These useful functions help to program the desired waves in very flexible manner, enabling to support efficient laboratory and research works.

ex) measure AC waveform

Measurement functions

ex) measure DC + AC waveform

Measurement functions

Memory functions

During fundamental wave operation, output voltage (in CV mode), output current (in CC mode), CV/CC setting, and waveform settings can be saved in 10 set-up memories.

As sequence programs can be saved in up to three, it is useful when using frequently used multiple waveforms or sequence operations.

Other functions:
DOSF is equipped with a Protection function, Key-lock function, and CV/CC switching, as standard options.

Specifications

For details, download the datasheet below.

Options

* Selecting each individual option simultaneous in -LUs1, -LEt, and -LGob is not allowed.

-LD

Interlock

-LEt

LAN interface board *
Enable digital control via LAN

Control items
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of Constant Voltage/Constant Current, Frequency setting, Waveform setting (sine wave, square wave, and triangular wave), phase setting (sine wave), Duty setting (square wave and triangular wave)

-LF

Floating ground (Withstanding voltage of 200 Vdc)
The negative terminal of the output can be floatable up to 200 V. However, please take note that external control signal source (such as function wave generator) and the common for the measuring device that connects to amplifier's monitor terminal will also become floating potential in this case.

-LGob

Optical interface board *
With optical communication, isolation control is performed. As complete isolation is performed by means of optical fiber, this enables advance prevention of erroneous operation involved with transient phenomenon caused by surges, inductive lightning, external noise, etc.

  • -LGob: Optical interface board + optical cable 2 meters
  • -LGob(Fc5): Optical interface board + optical cable 5 meters
  • -LGob(Fc10): Optical interface board + optical cable 10 meters
  • -LGob(Fc20): Optical interface board + optical cable 20 meters
  • -LGob(Fc40): Optical interface board + optical cable 40 meters

Select the optional optical interface board (-LGob) when using this Bipolar power supply under the following conditions.

  • Noisy environment including factories (Example: Motors or coils are used near power supplies and loads).
  • Using with high voltage floating (more than 250 V).
  • Installation distance of 2 meters or more between the bipolar power supply and a controller such as a computer, laptop, or Programmable Logic Controller (PLC).

Control items
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of Constant Voltage/Constant Current, Frequency setting, Waveform setting (sine wave, square wave, and triangular wave), phase setting (sine wave), Duty setting (square wave and triangular wave)

*Adapter (CO/USB series) is required separately for control via digital interface.
If you select -LEt or -LUs1 option, no adapter is required.

-LMsm, -LMss

Master-slave control
"-LMsm" for Master unit, or "-LMss" for slave unit. Master unit or slave unit are to be set at the factory, and if master to slave change is required after shipment, adjustment at the factory will be needed. Maximum three units including master unit can be connected.

-LS

Remote switch (output ON/OFF)

-LUs1

USB interface board *
Enable digital control via USB

Control items
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of Constant Voltage/Constant Current, Frequency setting, Waveform setting (sine wave, square wave, and triangular wave), phase setting (sine wave), Duty setting (square wave and triangular wave)

-L(220V)

Changing the input voltage
200 Vac to 240 Vac ±10% single phase, 50/60 Hz input (150 W and 300 W models only)

How to order

When ordering, add Option No. in the following order by alphabet, number to Model No.
Example:DOSF60-20-LDFMsLMsmSUs1, DOSF20-100-LDFGob(FC20)LMssS

Accessory

Adapters for connecting optical interface board (separately sold)

To use the optical interface, you need to prepare an optical interface adapter separately. The following interface adapters are available according to the communication method of your controller port.

CO-E32: Adapter for LAN
Total 32 units can be connected to one CO-E32.
LAN cable is not provided.
USB-OPT: Adapter for USB
Total 32 units can be connected to one USB-OPT.
USB cable is not provided.
CO-OPT2-9: Adapter for RS-232C (9 pin)
Total 32 units can be connected to each CO-OPT2-9.
CO-OPT2-25: Adapter for RS-232C (25 pin)
Total 32 units can be connected to each CO-OPT2-25.
CO-OPT4-25: Adapter for RS-485 (25 pin)
Total 32 units can be connected to each CO-OPT4-25.
CO-G32: Adapter for GPIB
Total 32 units can be connected to one CO-G32.
GPIB cable is not provided.

For details, refer to CO/USB series datasheet.

-LGob Optical Interface Board

Dimensions

For details, download the datasheet below.

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