• DOL series
  • DOL series

DOL series

Four-Quadrant Fast Response Bipolar Power Supply

  • Max Voltage: ±120V
  • Max Current: ±120 A
  • Max Power:2000 W
  • Compact and light weight

Suitable for the testing of coils and DC motors

DOL series is four-quadrant bipolar power supply which source and sink electric power. They can be used in 2 modes of a constant voltage (CV) or a constant current (CC). The weight is half of the conventional units by adopting the aluminum frame.

In addition, DOL is particular about usability (for instance, "simple operation" and "quiet movement") thoroughly and is designed.

Applications

  • Inductive loads such as coil and transformer
  • Testing of various DC motors
  • Evaluation test for in-vehicle electrical component
  • Simulation of various batteries
  • Evaluation test for solar panel related devices
  • Capacitive loads such as electric double-layer capacitor
  • Surface treatment

This product is not designed for charge and discharge of battery.
Please consult us from here, if unit is used for charge and discharge application.

Features and Benefits

Four-quadrant action
DOL Series can be used both as a high speed response DC power supply and as a DC electronic load.
Constant voltage (CV)/Constant current (CC)
A single switch selects between CV and CC modes.
High-speed response
DOL Series is suitable for transient response test with enough output power and fast frequency response.
Compact & light weight
For maximum compactness and light weight, DOL Series has been improved for small footprint and easy carry.
DC output meter
3-digit digital meter displays the DC value of the output voltage and current. (The option of rms indication is available.)
DC bias
10-turn potentiometer to be used for the output setting volume when used as the DC power supply and for the bias setting when used as AC power supply is equipped.
Silent operation
Operating noise became quiet by having employed the silent fan, and also it became easy-to-use.
Wide lineup
Select a model fitting for your applications from the lineup of various output voltage and current.
Useful protective function
Protective function against over voltage / current and protective measures against output short-circuit are completely provided.

Models

Model Maximum output Frequency response [Hz] (-3 dB)
Voltage [V] Current [A] at CV mode at CC mode
DOL18-15 ±18 ±15 DC to 15 k DC to 10 k
DOL40-8 ±40 ±8 DC to 15 k DC to 10 k
DOL40-16 ±40 ±16 DC to 10 k DC to 10 k
DOL60-5 ±60 ±5 DC to 15 k DC to 10 k
DOL120-3 ±120 ±3 DC to 15 k DC to 10 k

Functions

Protections

Over voltage protection (O.V.P)

DOL series is equipped with over voltage protection, which protects load by limiting voltage up to approx. 110% of the rated output voltage even at abnormal conditions.

* -LVc option (output voltage limiter) enable to control the output in 0 to approx. 110% range.

Over current protection (O.C.P)

DOL series is also equipped with over current protection, which protects power supplies and load by limiting current up to approx. 110% of the rated output current.

* -LCc option (output current limiter) enable to control the output in 0 to approx. 110% range.

High speed over current protection

DOL series 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 1ms. Additional high speed over current protection can limit pulse current of square waveforms or from capacitor at approx. 2 times more current of rating.

The standard over current protection limits the static current, responding at around 1ms.

Output range

DOL 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.

graph
  • Vo max: rated output voltage
  • Io max: rated output current
legend

Specifications

For details, download the datasheet below.

Options

-LN: No protection against blackout

-LPr: rms display

-LVc: Output voltage limit

Variable from 0% to approx. 110% with front panel dial

-LCc: Output current limit

Variable from 0% to approx. 110% with front panel dial

-L(220V): 200 Vac to 240 Vac ±10% single phase

50 Hz/60 Hz input (270 W to 360 W models only)

How to Order

To order, please add the above following option mark to the model number.

Example: DOL18-15-LCcNPrVc(220V) (Alphabetical and input voltage order)

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

Download

The account registration is necessary for downloading

In this website, we provide only the latest version of information including instruction manuals as of our products. Therefore, the newest versions of manuals on the website might be not same as the ones of products you purchased in the past.

Please click here if you are not registered yet to our site.

Membership Registration (Free)

Please click here if you are already registered to our site.

Log in

Bipolar power supplies/High voltage Amplifiers