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  • 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 Function Generator

DJOPF series is a four-quadrant bipolar power supply that sources and sinks electric power. Thanks to the original design, a phenomenal lightweight and compact power supply, which is 5.51 inches (140 mm) in 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, triangle wave, sawtooth 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 controls the battery.

FEATURES AND BENEFITS

Response speed
Newly developed DJOPF series is the most appropriate for transient response tests with such high power and broad bandwidth.
Four models
Select a model fitting for your applications from various output voltage and current.
Built-in function generator
DJOPF includes a 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, the DJOPF series has been improved for a small footprint and easy carry.
Constant voltage (CV)/Constant current (CC)
A single switch selects between CV and CC modes.
Four-quadrant operation
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

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

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 two types of overcurrent protection: 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. Two times more current rating.

High speed overcurrent protection

Operation diagram

DJOPF is provided with two types of overcurrent protection: 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 capacitors at approx. Two times more current rating.

Output range

Fundamental Waveform Generated Function

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

Start phase (90 deg)
Start phase (90 deg)
On-phase control (+90 deg)
On-phase control (+90 deg)
On-phase control (–180 deg)
On-phase control (–180 deg)
Duty cycle (20%)
Duty cycle (20%)

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 the 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 jumps, etc. Any desired waveform can be generated, which makes it useful for various experiments, evaluations, and validation applications.

  • Step time: 10 ms to 1999 s 999 ms (minimum step time: 1 ms)
  • Up to 16 steps per program and settings for three programs can be saved.
  • Can be set CV/CC mode per program
  • Repetition: 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 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
[Protection function],[Key-lock function], and [CV/CC crossover], as standard functions.

Specifications

For details, download the datasheet below.

Options

-LEt *

LAN interface port
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 triangle wave), Phase setting (sine wave), Duty setting (square wave and triangle wave)

-LGob *

Optical Interface port
With optical communication, isolation control is performed. As complete isolation is performed by means of optical fiber, this enables advanced prevention of erroneous operations involved with transient phenomena caused by surges, inductive lightning, external noise, etc.

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

Select the optional optical interface port (-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).
-LNh

No handle
The handle for carrying will not be equipped.

-LS

External output ON/OFF (OUTPUT ON/OFF)
It is impossible to select -LGob, -LUs1, and -LEt (Digital interface port) simultaneously.

-LUs1 *

USB interface port
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 triangle wave), Phase setting (sine wave), Duty setting (square wave and triangle 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

Accessories

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

Interface adapters

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

  • CO-E32: LAN to optical interface adapter
  • USB-OPT: USB to optical interface adapter
  • CO-OPT2-9: RS-232C (9 pin) to optical interface adapter
  • CO-OPT2-25: RS-232C (25 pin) to optical interface adapter
  • CO-OPT4-25: RS-485 (25 pin) to optical interface adapter
  • CO-G32: GPIB to optical interface adapter (Discontinued in December 2028)
Example of communication with optical fiber
Example of communication with optical fiber | DJOPF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
For details, refer to CO/USB series.
Application software for power supplies and electronic loads

PSS2en series
PSS2en is the dedicated software that can actuate various power supplies, electronic loads, and digital controllers for power supplies manufactured by Matsusada Precision Inc. with a simple setup.
It is the perfect for the aging test, the burn-in test and the withstand voltage test for electronic parts, and for the endurance test, intermittent/continuous operation test or various simulation test for electric component of automobile.
For details, refer to PSS2en page.

PSS2en | Application software for power supplies and electronic loads | Matsusada Precision

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 Ω (at 0.1 μF) to 1000 Ω (at 1000 pF) of high-voltage resistance in the output in series. Please note that the frequency band is limited when using an amplifier with a capacitive load, as shown in the formula on the right.
In addition, when an amplifier is used for a corona discharge, a current higher than its rating will flow, and it will affect the amplifier badly. In this case, as well as when using an amplifier with a capacitive load, please install the output resistance and limit the current.

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

* Please avoid continuous input of the high-frequency signal, which reduces the output frequency of an amplifier. An amplifier will break because of an increase in internal loss.

Read more

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