HIGH SPEED FOUR-QUADRANT BIPOLAR POWER SUPPLIES
- Voltage range: ±20V to ±80V
- Current: ±5A to ±20A
- Power: 400W
- Ultimate in accurate program operation
FOUR-QUADRANT BIPOLAR POWER SUPPLIES ARE DEVELOPED UP TO THE FOLLOWING
The DOKF series is a four-quadrant power supply capable of sourcing and sinking current.
They can be applied widely according to the usage from transient response tests to various product tests as they realize high-speed response of DC to 120 kHz (at constant voltage mode) and can generate basic waves such as sine wave, rectangular wave and programmed waves by embedded function generator.
And, as they provide also the high resolution sequence function as standard, you can program output patterns in detail. Moreover, as their generation of wave and setting sequence can be made all with the simplified operation on the front panel, you can make full use of various functions easily.
FEATURES AND BENEFITS
- Superior visibility and operability by using color liquid crystal display (LCD).
- High bandwidth of DC to 120kHz.
- Four-quadrant behavior is able to source and sink current.
- It is possible to generate distortion-free waveforms such as sine and rectangular waves.
- It is possible to set and operate high-performance sequences in 1024 steps.
- There are 2 modes of DC and AC + DC and each of them can be set individually.
- 2 mode operation of CV (constant voltage) and CV (constant current) are applicable.
- Synchronous operation (synchronized clock) of frequency accuracy and up to three power supplies in parallel (synchronized trigger) available.
- GPIB, USB and RS-232C interface are equipped as standard.
- It is possible to output voltage/current in 16 bits and customized waves of resolution of 1024 in one cycle. (optional control software)
- Highly accurate program operation.
- Arbitary waveform is to output in high quality.
- Extremely refined quality waveform output.
APPLICATIONS
- Suitable for driving capacitive loads such as capacitors.
- To Drive inductive loads such as coils and transformers.
- Tests of various motors.
- Testing of power inverters such as for solar panels.
- Voltage fluctuation tests for automotive electrical components.
Note: We have not designed this product to be charge and discharge batteries.
For battery charging and discharging applications, please refer to the Battery Cycle Tester product page.
OPERATION RANGE
Models
Please consult with us for specifications other than the below.
| Model | Output | Frequency Bandwidth (-3 dB) | |||
|---|---|---|---|---|---|
| Voltage | Current | Power | CV mode | CC mode | |
| DOKF20-20 | ±20 V | ±20 A | 400 W | DC to 120 kHz | DC to 60 kHz |
| DOKF40-10 | ±40 V | ±10 A | |||
| DOKF60-6.7 | ±60 V | ±6.7 A | DC to 50 kHz | ||
| DOKF80-5 | ±80 V | ±5 A | |||
Functions
Basic waveform generation function
DOKF is equipped with a built-in function generator that produces basic waves such as sine, rectangular, and triangle waves.
The frequency range can be set between 0.01 Hz and 120 kHz. Easy adjustments/editions of amplitude, start phase (for sine wave), phase shift (for sine wave), and duty ratio (for rectangular/triangle wave) are possible. DOKF has special features of "soft start" and "soft stop" which enable the programming of initial rise and fall characteristics of the output.
AC Volt/Current sweep, frequency sweep
DC Volt/Current ramp
Applications
Power activation test, Various start-up tests of motor, etc, Fluctuation test of wave shape and so on.
Sequence functions
DOKF is equipped with a sequence function that can program parameters such as step time, step amplitude ramp, DC voltage and current ramping, AC voltage and current ramping, frequency sweep, AC superposition, step jump, and jump times. These functions enable flexible programming of desired waveforms, supporting efficient laboratory and research work.
A Complex sequence can be created easily with the intelligible display.
- Step time 0.1 ms to 1000 h (resolution of 0.1 ms)
- Maximum 1024 steps per program.
- Maximum 64 programs can be stored in memory for each CC/CV operation
- Program repeat can be set by "endless repeat" or "1 time to 10000 times"
- Multiple programs can be converted to activate
Sequence functions help to create complicated waves like the below to be simply and easily edited.
- Applications
-
Test for motors, Pulse power supply and Various evaluations.
Measurement functions
DOKF is equipped with a measurement function that can measure DC value, AC RMS value, and Max/Min value, likewise, it is possible to automatically measure wide range bandwidth from DC to 120 kHz. There are 4 parameters that are simultaneously displayable, each of which is individually programmable. As this measurement is a standard feature, no option needs to be purchased. This sophisticated feature reduces the time required for editing output waveforms, enhancing work efficiency.
Synchronized Operation
The following DOKF operations are available for up to three units.
Synchronous trigger
Through a single operation of the master unit, it is possible to match the output timing of ON/OFF in one or two slave units. When turning the output on, the start-up delay between the master and slave units is less than 0.5 μs.
*To use this function, please purchase “Dedicated cable for synchronous trigger” of 2 meters separately.
Synchronous clock
By providing the clock input of 10 MHz, the individual difference between the oscillators installed on each unit is removed (in this case, there are a few ppm up to several tens ppm in general). What is more, frequency, accuracy, and sequence-step time are completely unified through the operation.
Moreover, the product is also available for setting the phase shift difference for the sine wave toward each unit.
(*Please prepare the coaxial cable on both ends of BNC connectors which is not included but required for the synchronous clock.)
*When the slave unit is required to synchronize in accordance with the waveform set by the master unit, the -LMs option must be taken (in master/slave control).
Note that the time-synchronized operation is not available if using the master/slave control.
- Other functions:
- Standard features include protection functions (individually settable for turn-off or limit), key lock function, CV/CC mode switching, and memory function (up to 99 settings).
Control Pannel Display
- Display: Display various settings and measurements.
- OUTPUT switch: ON/OFF for output
- Rotary encoder: Change value
- POWER switch: ON/OFF for main power
- CANCEL switch: Cancel settings
- ENTER switch: to confirm and key in
- CV/CC switch: Switchover CV/CC mode
- MEMORY switch: Switchover memory screen
- SETTING/STORAGE switch: Make to setting change menu, store memory
- PROTECTION switch: to Switch protection setting menu
- Shift up switch: Shift up each setting item
- Shift down switch: Shift down each setting item
- SEQUENCE switch: Use for switchover of sequence screen or interrupt or restart of sequence operation
- Shifting left switch: Shift digits of settings to left
- Shifting right/LOCK switch: Shift digits of settings to the right and also use the key lock function
Specifications
- Input voltage
- 85 to 250 Vac, 50/60 Hz, Single-phase
- Output control
-
[Local] Front panel controls
[External control signal] Vcon-in, Input voltage -10 to +10 V
[Digital remote] Command
Options
- -LCk
-
CC-Link interface port
It enables digital remote control via the CC-Link network.
- -LMsm: Master machine for master-slave control
-LMss: Slave machine for master-slave control -
By connecting a master machine and a slave machine with dedicated control lines, the master machine can control all slave machines at once. Parallel connection can increase the current that is insufficient for a single operation. Up to three units in total can be connected: one master unit and up to two slave units.
Note: Precautions for using the master-slave operation- Only the master-slave connection is available for the same model.
- In parallel operation, the frequency range is narrower.
- It can also operate on a single.
- Factory adjustment is required when changing the master-slave combination.
- If this option is selected, synchronous operation is not available.
- -LRa
-
The front panel attachable to the 19-inch rack of EIA or JIS
The front panel becomes the panel attachable to the 19-inch rack of EIA or JIS standards.
The dimension of the front panel is modified in the case attached. Please consult our sales staff.
(It is impossible to support the main unit only with these brackets. Please utilize always a sole plate or angle bars to support the unit weight.)
How to Order
When ordering, add Option No. in the following order by alphabet to Model No.
<Example> DOKF40-10-LCkMsmRa
Accessories
- AC input cable
-
Standard CABLE TYPE8 
125 V/125 A 2.5 meters Fixed length
Sold separately CABLE TYPE3 
250 V/10 A 2.5 meters Fixed length
Sold separately CABLE TYPE4 
250 V/10 A 2.5 meters Fixed length
Please use appropriate AC cable.
- DOKF-ST cable
-
Synchronized trigger cable
for one master unit and one slave unit
- DOKF-ST2 cable
-
Synchronized trigger cable
for one master unit and two slave units
- Application software
-
PSS2en series: Remote control, Test workflow design, and Data logging
Click here for the PSS2en seriesPSS2en 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 perfect for the aging test, the burn-in test, and the withstand voltage test for electronic parts, as well as for the endurance test, intermittent/continuous operation test, or various simulation tests for automobile electric components.
Dimensions
Tech Notes
Characteristics of amplifier
Rise time
(step time): Responsiveness may be expressed with rise time. (see right figure)
Rise time for amplifiers in fc (Hz) of response time (= frequency band) is calculated with the following equation generally.
"tr ≒ 0.35/fc"
Decay time tf is equal to tr.
Frequency bandwidth
: to 120 kHz, tr = tf ≒ 2.9 μs
: to 60 kHz, tr = tf ≒ 5.8 μs
Response speed
When an accurate output wave is required, please select an amplifier in a sufficiently higher frequency band than the applied one. Generally, a speedy frequency band of 3 times to 5 times of applied frequency for a sine wave and 10 times for a rectangular wave is required. If the frequency band is in lacking, as not only is output oscillation reduced but also the phase difference of input and output becomes larger, consideration to apply it monitoring output wave is required.
For capacitive loads
In the case of a capacitive load, oscillation may be caused. If so, please insert a power resistor into the series output.
And, in capacitive load, please note that the frequency band is limited by the resistance and capacity inserted in the series.
For inductive loads
At CC mode, oscillation may be caused by the inductance of inductive loads.
If so, please connect the C-R straight circuit between output terminals so as not to cause oscillation.
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DOKF series Datasheet
Date: 2025-01-16 rev 16
PDF (1,729 KB)
-
Bipolar Power Supplies with Function Generator
Date: 2025-01-20 rev.06
PDF (4,904 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOKF series Instruction Manual
Date: 2022-9-1 rev0.9
PDF (2,327 KB)
-
DOKF series Instruction Manual (Communication Interface)
Date: 2022-3-3 rev.0.6
PDF (1,430 KB)
-
DOKF series USB Driver
Date: 2025-01-22 rev 1.7.6
ZIP (6,504 KB)
-
DOKF series Outline Drawing (DXF, PDF)
Date: 2024-07-25
ZIP (2,601 KB)
Login Required
-
DOKF series Datasheet
Date: 2025-01-16 rev 16
PDF (1,729 KB)
-
Bipolar Power Supplies with Function Generator
Date: 2025-01-20 rev.06
PDF (4,904 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOKF series Instruction Manual
Date: 2022-9-1 rev0.9
PDF (2,327 KB)
-
DOKF series Instruction Manual (Communication Interface)
Date: 2022-3-3 rev.0.6
PDF (1,430 KB)
-
DOKF series USB Driver
Date: 2025-01-22 rev 1.7.6
ZIP (6,504 KB)
-
DOKF series Outline Drawing (DXF, PDF)
Date: 2024-07-25
ZIP (2,601 KB)
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