• DJOPF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
  • DJOPF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

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 a function generator

DJOPF series are four-quadrant bipolar power supplies that source and sink electric power. Thanks to the original design, phenomenal lightweight and compact size power supply, which is 5.51 inches (140 mm) width, and weighs 3 kg, has been achieved. The bipolar amplifier is equipped with a built-in function generator enabling its compact size and fast response. You can use them in 2-mode of a CV (constant voltage) or a CC (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 tests such as solar panels, the instruments driven by a battery, and the IC, which control the battery.

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

Response speed
The newly developed DJOPF Series is the most appropriate for transient response tests 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
A 3-digit digital meter displays the DC or AC value of the output voltage and current.
Compact & light weight
For maximum compactness and lightweight, DJOPF Series has been improved for a 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
Overvoltage protection, overcurrent protection, and protection against output short circuits are all provided.

Applications

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

Models

Model Maximum output Frequency bandwidth (-3 dB)
Voltage Current Power
DJOPF10-5 ±10 V ±5 A 50 W DC to 30 kHz
DJOPF20-3 ±20 V ±3 A 60 W DC to 30 kHz
DJOPF30-2 ±30 V ±2 A 60 W DC to 30 kHz
DJOPF60-1 ±60 V ±1 A 60 W DC to 30 kHz
  • Even more high power model, DOP series, faster model, DOS series, are available. Contact to local sales office for details.
  • Please consult with us for specifications other than the below.

Functions

Protections

Voltage limit protection (V limit)

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 (I limit)

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.

Overvoltage protection (OVP)

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

Overcurrent protection (OCP)

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

High speed overcurrent protection

DJOPF is provided with 2 types of overcurrent protections, high speed overcurrent protection to limit the pulse current, and standard overcurrent protection to limit the static current.

The standard overcurrent 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 overcurrent protection

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.

Output range

Fundamental wave generated function

DJOPF is equipped with a built-in function generator that produces sine, square, and triangle waves. The 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 ramp 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, etc

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

-LEt *

LAN interface board

Enable 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

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 DC 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 this AC Power Source and a controller such as a computer, laptop, or Programmable Logic Controller (PLC).

Adapters (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.

Adapter for LAN: CO-E32

Total 32 units can be connected to one CO-E32.
LAN cable is not provided.

Adapter for LAN: CO-E32m | Bipolar power supplies | Matsusada Precision

Adapter for USB: USB-OPT

Total 32 units can be connected to one USB-OPT.
USB cable is not provided.

Adapter for USB: CO-U32m | Bipolar power supplies | Matsusada Precision

Adapter for RS-232C (9 pin): CO-OPT2-9
Adapter for RS-232C (25 pin): CO-OPT2-25
Adapter for RS-485 (25 pin): CO-OPT4-25

Total 32 units can be connected.

Adapter for RS-232C: CO-MET2-9< | Bipolar power supplies | Matsusada Precision

Adapter for GPIB: CO-G32

Total 32 units can be connected to one CO-G32.
GPIB cable is not provided.

Adapter for GPIB: CO-G32m | Bipolar power supplies | Matsusada Precision

(A) Optical fiber cable
As of models with -LGob option, a two-meters cable is provided in each model. If you need a longer cable, please consult us from here.
-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

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

How to Order

When ordering, add Option No. in the following order by alphabet, and input voltage to Model No.
Example: DJOPF60-1-LNhS, DJOPF10-5-Lgob(Fc5)Nh

Cable

AC input cable

[Standard] CABLE TYPE1 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 125 V / 10 A 2.5 meters

Fixed length

[Sold separately] CABLE TYPE3 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 250 V / 10 A 2.5 meters

Fixed length

[Sold separately] CABLE TYPE4 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 250 V / 10 A 2.5 meters

Fixed length

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.

Read more

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