• DJOPF series
  • DJOPF series

DJOPF series

Four-quadrant high speed bipolar power supply

Four-quadrant bipolar power supplies which source and sink power

  • Output Voltage:
    ±10V to ±60V
  • Max output power:
    50W, 60W
  • Frequency bandwidth:
    DC to 30kHz
  • DC output meter

High speed bipolar power supply with function generator

DJOPF series are four-quadrant bipolar power supplies which source and sink electric power. Thanks to the original design, phenomenal light weight and compact size power supply, which is 140 mm width, and weigh 3 kg has been achieved,bipolar amplifier equipped with a built-in function generator enabling its compact size and fast response. They can be used in 2-mode of a CV (constant voltage) or a CV (constant current). They are ultra compact and high speed, driving output proportional to the input waveform such as a sine wave, triangular wave, saw wave, and square wave. DJOPF series is most appropriate for evaluation test such as solar panels, the instruments driven by battery and the IC which control battery.

Even more high power model, DOP series, faster model, DOS series, are available. Contact to local sales office for details.

Features

Response speed
Newly developed DJOPF Series is the most appropriate for transient response test with such high power and broad bandwidth.
Wide lineup
Select a model fitting for your applications from the lineup of various output voltage and current.
Built-in function generator
DJOPF includes the sequence function other than a waveform generation function.
DC or AC output meter
3-digit digital meter displays the DC or AC value of the output voltage and current.
Compact & light weight
For maximum compactness and light weight, DJOPF Series has been improved for small footprint and easy carry.
CV (constant voltage) /CV (constant current)
A single switch selects between CV and CC modes.
Four-quadrant action
DJOPF Series can be used both as a high speed response DC power supply and as an electronic load.
Complete protective function
Protective function against over voltage/current and protective measures against output short-circuit are completely provided.

Applications

  • Suitable to evaluate battery driven equipment to use as a simulated battery
  • Inductive load such as coil and transformer
  • Capacitive load like capacitor
  • Various motor tests
  • Tests for in-vehicle electrical component
  • Evaluation test for solar panel related devices
  • For surface treatment

This product is not designed for charge and discharge of battery. Please contact nearby sales if unit is used for charge and discharge application.

Models

Model Maximum output Frequency bandwidth (-3 dB)
Voltage [V] Current [A] Power [W]
DJOPF10-5 ±10 ±5 50 DC to 30 kHz
DJOPF20-3 ±20 ±3 60 DC to 30 kHz
DJOPF30-2 ±30 ±2 60 DC to 30 kHz
DJOPF60-1 ±60 ±1 60 DC to 30 kHz

Functions

Protections

Voltage limit protection (Vlimit)

DJOPF is equipped with voltage limit protection,which protects load by limiting output with the value that was set optionally even at abnormal conditions.

Current limit protection (Ilimit)

DJOPF is equipped with current limit protection,which protects load and power supply by limiting output with the value that was set optionally even at the time of overload.

Over voltage protection (O.V.P)

DJOPF is equipped with over voltage protection, which protects load by limiting voltage up to approx. 120% of the rated output voltage even at abnormal conditions.

High speed over current protection

DJOPF is provided with 2 types of over current protections, high speed over current protection to limit the pulse current, and standard over current protection to limit the static current.
The standard over current protection limits the static current, responding at around 1 ms. Additional fast response type limited current circuit can limit pulse current of square waveforms or from capacitor at approx. 2 times more current of rating.

High speed over current protection

Over current protection (O.C.P)

DJOPF is also equipped with over current protection, which protects power supplies and load by limiting current up to approx. 120% of the rated output current.

Output range

DJOPF series is a bipolar power supply which can perform four-quadrant operation. They can supply (source) and absorb (sink) current in the field of the drawing on the right.

  • Vo max: rated output voltage
  • Io max: rated output current
This image is a legend.
This image is graph.

Fundamental wave generated function

DJOPF is equipped with a built in function generator that produces sine, square, and triangle waves. Frequency range can be set between 0.01 Hz and 30 kHz, and easy adjustments of amplitude, initial phase (sine wave), switching/cutoff phase setting (sine wave), and duty cycle (square wave, triangular wave) are possible, making it very convenient for a variety of evaluation tests and applications.

Initial phase Initial phase
Switching phase Switching phase
Cutoff phase Cutoff phase
Duty cycle Duty cycle

Applications

Rush current source for rush current measurement, wave fluctuation test etc.

Measurement functions

DJOPF is equipped with measurement functions that measure DC value, AC value, maximum value and minimum value thus Wide frequency ranges, DC to 30 kHz, can be measured automatically, and it is easy to change the setting depending on application.

(Example) measure AC waveform. measure AC waveform
(Example) measure DC + AC waveform. measure DC+AC waveform

Sequence functions

DJOPF is equipped with a sequence function that can program step length, step amplitude, ramp,CV/CC mode, sequence-ending setting, AC superposition, step jump, number of jump, etc. Any desired wave form can be generated making it useful for various experiment, evaluation, and validation applications.

  • Setting length:10 ms to 1999 s 999 ms (minimum setting length: 1 ms)
  • Up to 16 steps can be set and saved plus 3 programs per program.
  • Can be set CV/CC mode per program
  • Frequency: Infinite, 1 to 999
  • DC voltage/current lamp operation, AC voltage/current sweep operation and AC frequency sweep operation are available.
Program image
Program image

Complicated waveforms such as below can be easily generated just by using the sequence function.

Pulse current variation Pulse current variation
Ripple current superposition Ripple current superposition
AC voltage variation AC voltage variation
DC voltage interruption DC voltage interruption

Applications

Motor testing, pulse power supplies, or various evaluation equipment, ect

Memory function

DJOPF is equipped with both preset and set-up memory.
During fundamental wave operation, output voltage (at CV mode), Output current (at CC mode), CV/CC setting, and waveform setting can be saved to 10 set-up memories. Also, sequence programs can be saved in up to 3 programs. Data changes can be saved and data called out very easily.

DJOPF is equipped with a [Protection function],[Key-lock function], and [CV/CC crossover], as standard functions.

Specifications

For details, download the datasheet below.

Options

* These options cannot be selected together. Only one of each can be selected.

-LEt *: LAN interface board - Digital control via LAN

  • 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)

-LGob *: Optical interface board - For isolated control with optical communication

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

Insulation control is made with optical communication. As perfect insulation is made by optical fiber it is able to forestall miss operation as transient phenomenon caused by surge, dielectric thunder or external noise, etc.

When use them under following conditions, select -LGob always.

  • Noisy environment as in a factory. (Example: A motor or a coll is used near to load or power supply)
  • Used in high voltage floating. (250 V and higher)
  • Our power supply and controller (PC or PLC) can not be installed within 2 m.
-LGobOptical Interface Board
(B) CO-opt cable
As of models with -LGob option, a two-meter cable is provided in each model. The cable length depends on the option code you selected. If you need a longer cable, please consult with our sales staff.

-LNh: No handle

The handle for carrying will not be equipped.

-LS: Remote Switch (OUTPUT ON/OFF)

It is impossible to select -LGob, -LUs1, and -LEt (Digital interface board) at the same time.

-LUs1 *: USB interface board - Digital control via USB

  • 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)

How to Order

When ordering, add Option No. to Model No. in alphabetical order followed by the input voltage.

Example:
DJOPF60-1-LNhSUs1
DJOPF10-5-Lgob(Fc5)NhS

Cable

AC input cable

Standard
CABLE TYPE 1
125 V/10 A
  • CABLE TYPE 1 Power Input End
  • CABLE TYPE 1 Input Plug
Sold separately
CABLE TYPE 3
250 V/10 A
  • CABLE TYPE 3 Power Input End
  • CABLE TYPE 3 Input Plug
Sold separately
CABLE TYPE 4
250 V/10 A
  • CABLE TYPE 4 Power Input End
  • CABLE TYPE 4 Input Plug

Dimensions

For details, download the datasheet below.

Tech Notes

Capacitive Load

When a capacitive load is more than 100 pF (including a stray capacitance of output wire), the resonance in the output may occur. In that case, install 100-ohm (@0.1 μF) to 1000-ohm (@1000 pF) of high voltage resistance in the output in series. Please note that the frequency band will be limited as the formula written in the right figure when an amplifier is used with a capacitive load.
In addition, when an amplifier is used for the use such as a corona discharge, the current which is higher than rating will flow and it will affect the amplifier badly. In this case, as well as the time to use an amplifier with a capacitive load, please install the output resistance and limit the current.

* Please avoid continuous inputting of high frequency signal which reduces output frequency of an amplifier. An amplifier will be broken because of increase of internal loss.

This image explains frequency band when a capacitive load is connected.

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Bipolar power supplies/High voltage Amplifiers