FOUR-QUADRANT FAST RESPONSE BIPOLAR POWER AMPLIFIER
- Max Voltage: ±120V
- Max Power:640 W
- DC to 10kHz or 15kHz
- Compact and lightweight
Suitable for the testing of coils and DC motors
DOL series is a four-quadrant bipolar power amplifier which sources and sinks electric power. They can be used in 2 modes: Constant Voltage (CV) and 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.
Note: This product is not designed for charge and discharge of battery.
For battery charging and discharging applications, please refer to the Battery Cycle Tester product page.
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 tests with enough output power and fast frequency response.
- Compact & Lightweight
- For maximum compactness and lightweight, the DOL series has been improved for a 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 range of products
- Select a model fitting for your applications from our wide output voltage and current range.
- Useful protective function
- Protective function against overvoltage/overcurrent and protective measures against output short-circuit are completely provided.
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 etc.
Models
| Model | Maximum output | Frequency response (-3 dB) | ||
|---|---|---|---|---|
| Voltage | Current | at CV mode | at CC mode | |
| DOL18-15 | ±18 V | ±15 A | DC to 15 kHz | DC to 10 kHz |
| DOL40-8 | ±40 V | ±8 A | DC to 15 kHz | DC to 10 kHz |
| DOL40-16 | ±40 V | ±16 A | DC to 10 kHz | DC to 10 kHz |
| DOL60-5 | ±60 V | ±5 A | DC to 15 kHz | DC to 10 kHz |
| DOL120-3 | ±120 V | ±3 A | DC to 15 kHz | DC to 10 kHz |
Functions
Protections
OverVoltage Protection (OVP)
DOL series is equipped with overvoltage 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) enables to control of the output in 0 to approx 110% range.
OverCurrent Protection (OCP)
DOL series is also equipped with overcurrent protection, which protects power supplies and load by limiting current up to approx 110% of the rated output current.
* -LCc option (output current limiter) enables to control of the output in 0 to approx 110% range.
High speed overcurrent protection
DOL series 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 high-speed overcurrent protection can limit the pulse current of square waveforms or from capacitors at approx 2 times more current of rating.
Output Range
DOL series is a bipolar power supply that can perform four-quadrant operation. They can supply (source) and absorb (sink) current in the field of the drawing on the right.
Specifications
Options
- -LCc
-
Output current limit
Variable from 0 to approx. 110% with front panel dial
- -LN
-
Output state auto-recovery (former: no power failure protection)
This option retains the output state when recovering from an input power interruption, such as an AC power switch ON/OFF or a power failure. Therefore, there is no need to reset the protection status by turning off the OUTPUT switch once.
Caution: If you turn on the power while the OUTPUT setting is ON, the output will be ON.
- -LPr
-
rms display
- -LVc
-
Output voltage 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
When ordering, add Option No. in the following order by alphabet and input How to order voltage to Model No.
Example: DOL18-15-LCcNPrVc(220V)
Accessories
Function Generator
Dimensions
Tech Notes
Rise time
(Stepping time): The response time is sometimes described by the rise time (as shown in the drawing on the right).
The rise time of an amplifier at a response speed of (= frequency bandwidth) Fc (Hz) is generally acquired by "tr &≈ 0.35/fc."
Fall time tf is the same as tr.
: at 15 kHz or lower, tr = tf = around 23 μs
: at 10 kHz or lower, tr = tf = around 35 μs
Response speed
When accurate output waveforms are required, select a amplifier with a frequency bandwidth higher enough than the operating frequency.
In case of using sine waves, 3 times to 5 times more frequency bandwidth is required, and around 10 times more in case of square waves in general.
Inadequate bandwidth causes not only decrease in the output amplitude but much difference between the input and output phases.
Therefore operating the product while monitoring the actual output waveforms is recommended.
Capacitative load
Capacitative load may cause oscillation.
In such cases, placed a power resistance in series with the output.
Be careful that the frequency bandwidth is limited depending on the resistance and capacitance placed in series when capacitative load.
Inductive load
Some inductance of inductive load may cause resonance in CC mode.
In such cases, connect a C-R series circuit between output terminals to prevent resonance.
Download
If you are unable to download a file
Please try the following solution.
- Please press Ctrl+F5 to clear the cache of your web browser and try again.
- Please restart your web browser and log in again to try again.
- Please change your web browser to another browser and try again.
- Restart the computer and try again.
- Please try again on a different computer.
-
DOL series Datasheet
Date: 2024-10-25 rev 09
PDF (1,726 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2024-12-12 rev.07
PDF (4,770 KB)
-
DOL series Instruction Manual
Date: 2023-10-18 rev 0.0
PDF (864 KB)
Login Required
-
DOL series Datasheet
Date: 2024-10-25 rev 09
PDF (1,726 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2024-12-12 rev.07
PDF (4,770 KB)
-
DOL series Instruction Manual
Date: 2023-10-18 rev 0.0
PDF (864 KB)
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.
