Fast Frequency response, compact bipolar power supplies and high voltage amplifier are available.

Please feel free to ask us

INDEX

Bipolar power supplies, Low Voltage Amplifiers

Four-quadrant bipolar power supply which source and sink electric power. Most appropriate for evaluation test such as solar panels devices, equipments driven by battery.

Less than 1 kW

Series DJOP
DJOP
DJOPF
DJOPF
DOC
DOC
DHOP
DHOP
DOA
DHOP
DOKF
DOKF
Output Power 60 W 60 W 100 W 240 W 300 W 400 W
Frequency bandwidth
(-3 dB)
* It differs from the model conditions.
DC to 30 kHz DC to 30 kHz DC to 10 kHz DC to 100 kHz DC to 1 MHz DC to 120 kHz
Output Voltage 10 V ±10 V ±10 V
20 V ±20 V ±20 V ±20 V ±20 V
30 V ±30 V ±30 V
40 V ±40 V
45 V ±45 V
60 V ±60 V ±60 V ±60 V
75 V ±75 V
80 V ±80 V
150 V ±150 V
500 V ±500 V
1000 V ±1000 V
Features Digital Functions
  • Basic Wave Generated
  • Sequence
  • Measurement
  • Memory
  • Basic Wave Generated
  • Sequence
  • Measurement
  • Memory
  • Synchronized Operation
Four-quadrant action Four-quadrant action Four-quadrant action Four-quadrant output (Source and Sink are available) Four-quadrant action Four-quadrant action to source and sink current Four-quadrant action to source and sink current
DC bias function DC bias function DC bias function DC bias function
DC or AC meter DC output meter DC or AC output meter DC output meter
Constant voltage and
constant current
Constant voltage and constant current Constant voltage and constant current Constant voltage and constant current Constant voltage and constant current Constant voltage and constant current
Complete protective function Complete protective function Complete protective function Complete protective function
Ripple [CV mode]
Less than 0.02% rms
[CC mode]
Less than 0.2% rms
[CV mode]
Less than 0.02% rms
[CC mode]
Less than 0.2% rms
[CV mode]
0.02% rms
[CC mode]
0.2% rms
[CV mode]
Less than 0.1% rms
[CC mode]
Less than 0.4% rms
Less than or equal to 0.02% rms [CV mode]
DOKF20-20: 2 mV
Except DOKF20-20: 4 mV (typ.)
[CC mode] 3 mA, Typical
Applications Motor Various motor tests Various motor tests Various motor tests Evaluation tests of various motors Various motor tests
Coil and transformer Inductive load such as coil and transformer Inductive load such as coil and transformer Inductive load such as coil and transformer Evaluation tests of inductive load such as coil and transformer To drive inducible load such as coil and transformer
Capacitor Capacitive load like capacitor Capacitive load like capacitor Capacitive load like capacitor Evaluation tests of capacitive loads such as capacitors or display panels Drive capacitive load such as capacitor
In-vehicle electrical component Voltage regulation tests of in-vehicle electrical component Tests of in-vehicle electrical component Voltage regulation tests of in-vehicle electrical component Voltage fluctuation tests of electric elements of cars
Solar panel and batteries Evaluation test of devices related to solar panel devices Evaluation test of devices related to solar panel devices Evaluation test of devices related to solar panel devices Evaluation tests of devices relative equipment to solar batteries Evaluation of solar cell panel related equipments such as power conditioners
Surface treatment For surface treatment For surface treatment For surface treatment
Evaluation tests Simulated battery for evaluation tests of equipments driven by battery. Simulated battery for evaluation tests of equipments driven by battery. Simulated battery for evaluation tests of equipments driven by battery.
Series DJOP
DJOP
DJOPF
DJOPF
DOC
DOC
DHOP
DHOP
DOA
DHOP
DOKF
DOKF

1 kW or more

Series DOSF
DOSF
DOEF
DOEF
DOP
DOP
DOPF
DOPF
DOS
DOS
Output Power 1.2 kW 1.2 kW 2 kW 2 kW 2 kW
Frequency Bandwidth
(-3 dB)
* It differs from the model conditions.
DC to 200 kHz DC to 200 kHz DC to 30 kHz DC to 30 kHz DC to 200 kHz
Output Voltage 5 V ±5 V ±5 V
6 V ±6 V ±6 V
10 V ±10 V ±10 V
20 V ±20 V ±20 V ±20 V ±20 V ±20 V
25 V ±25 V ±25 V ±25 V ±25 V
30 V ±30 V ±30 V
40 V ±40 V
45 V ±45 V ±45 V ±45 V ±45 V
60 V ±60 V ±60 V ±60 V ±60 V ±60 V
70 V ±70 V ±70 V
80 V ±80 V ±80 V
120 V ±120 V ±120 V
150 V ±150 V ±150 V
200 V ±200 V ±200 V
300 V ±300 V ±300 V
Features Digital Functions
  • Basic Wave Generated
  • Sequence
  • Measurement
  • Memory
  • Basic Wave Generated
  • Sequence
  • Measurement
  • Memory
  • Synchronized Operation
  • Basic Wave Generated
  • Sequence
  • Measurement
  • Memory
DC bias function DC bias function DC bias function
Four-quadrant action Four-quadrant action to source and sink current Four-quadrant action Four-quadrant action Four-quadrant action
DC or AC meter DC output meter DC output meter
Constant voltage and
constant current
Constant voltage and constant current Constant voltage and constant current Constant voltage and constant current Constant voltage and constant current
Master/Slave Master/Slave Master/Slave
Complete protective function Complete protective function
Ripple 0.02% rms 0.02% rms Less than 0.02% rms 0.02 s% rms Less than 0.02% rms
Applications Motor Various motor tests Tests of various DC motors Various motor tests Motor testing Various motor tests
Coil and transformer Biasing inductive loads (coil, transformer, etc.) To drive inducible load such as coil and transformer Inductive load such as coil and transformer Biasing inductive loads (coil, transformer, etc.) Inductive load such as coil and transformer
Capacitor Driving capacitive load (capacitors and so on) Capacitive load such as electric double-layer capacitor Driving capacitive load (capacitors) Ripple test of capacitors
In-vehicle electrical component Voltage fluctuation tests of automotive electrical components Voltage regulation tests of in-vehicle electrical component Voltage regulation tests of in-vehicle electrical component
Solar panel and
batteries
Power conditioners, solar panels Evaluation of solar cell panel related equipments such as power conditioners Evaluation test of solar panel related devices Solar panels Evaluation test of solar panel related devices
Surface treatment For surface treatment For surface treatment For surface treatment
Series DOSF
DOSF
DOEF
DOEF
DOP
DOP
DOPF
DOPF
DOS
DOS

High Voltage Amplifiers

Models with fastest slew rate of 1,200 V/µs or compact module for built-in use are available. Those series produces high voltage output in sine waves, triangle waves, saw tooth waves and more.

Series AP
AP/AS
AS
AP/AS
COR
COR
AMS
AMS/AMT
AMJ
AMJ
AMT
AMS/AMT
AMP
AMP
AMPS
AMPS
Output Power 3 W 3 W 20 W 30 W 40 W 200 W 1.2 kW 1.2 kW
Frequency bandwidth
(-3 dB)
* It differs from the model conditions.
DC to 2 kHz DC to 24 kHz DC to 1 kHz DC to 30 kHz DC to 75 kHz DC to 100 kHz DC to 60 kHz DC to 200 kHz
Output Voltage 0.3 kV ±0.3 kV ±0.3 kV
0.5 kV ±0.5 kV
0.6 kV ±0.6 kV ±0.6 kV ±0.6 kV ±0.6 kV ±0.6 kV
1 kV ±1 kV ±1 kV ±1 kV ±1 kV ±1 kV
1.5 kV ±1.5 kV ±1.5 kV ±1.5 kV
2 kV ±2 kV ±2 kV ±2 kV
3 kV ±3 kV ±3 kV ±3 kV
4 kV ±4 kV
5 kV ±5 kV ±5 kV ±5 kV ±5 kV
10 kV ±10 kV ±10 kV ±10 kV ±10 kV ±10 kV
20 kV ±20 kV ±20 kV ±20 kV
30 kV ±30 kV ±30 kV
40 kV ±40 kV
Features Slew rate Fast Responsibility up to 24 kHz Fast response of slew rate up to 30 V/µs Ultra high slew rate up to 1200 V/µs, only ±10 kV output model and ±20 kV output model
High speed response High speed response up to 75 kHz High speed response 360V/µ sec High speed response of slew rate up to 700 V/µs High-speed response of frequency bandwidth up to 100 kHz
Wave form Desired output waveform reference to input waveform. Desired output waveform reference to input waveform. Various types of output wave forms according to the input wave Various types of output wave forms Various types of output wave forms according to the input wave
DC bias function DC bias function DC bias function DC bias function
DC output voltage monitor DC output voltage monitor, 3.5-digit digital meter DC output voltage monitor, 3.5-digit digital meter DC output voltage monitor, 3.5-digit digital meter
Other All-Solid-State All-Solid-State Three functions of CC, CV and HV amplifier in one unit The demand for evaluation of higher voltage solar battery panel
Return current terminal is standard and best for corona current control
Ripple 0.025% rms or less 0.025% rms or less 0.1% p-p or less 0.1% p-p or less Less than 0.1% 0.02% + 1 Vp-p or less Less than 0.02% + 1 Vp-p Less than 0.02% + 0.5 Vp-p
Applications Electro photography process Electro photography process Electro photography process Research and Development of electro photographic process Electro photography process Electro photography process Electro photography process Electro photography process Electro photography process
Corona discharge Corona discharge Corona discharge Experiment of corona discharge Corona discharge Corona discharge Corona discharge Corona discharge
Beam deflection Beam deflection Beam deflection Beam deflection Beam deflection Beam deflection Beam deflection Beam deflection
Electrorheological fluid Electrorheological fluid Electrorheological fluid Electrorheological fluid Electrorheological fluid Electrorheological fluid Electrorheological fluid
Electrostatic chuck Electrostatic chuck Electrostatic chuck Electrostatic chuck Electrostatic chuck Electrostatic chuck Electrostatic chuck
Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests Various Electrostatic tests
Other test Insulation and breakdown voltage testing Insulation and breakdown voltage testing Photosensitive drum testing Breakdown voltage testing Breakdown voltage testing Breakdown voltage testing Breakdown voltage testing
Series AP
AP/AS
AS
AP/AS
COR
COR
AMS
AMS/AMT
AMJ
AMJ
AMT
AMS/AMT
AMP
AMP
AMPS
AMPS

Contact Us

What is a Bipolar Power Supply? (Basic Knowledge)

High Voltage Amplifier

High voltage amplifier converts input voltage to high voltage waveform as it is as shown in fig. 1. These days the demand of HV amplifier is growing more and more, and now becoming an indispensable tool for research and development, experiments and integrating to a system for such fields as electronics, physics, biochemical and medical industries. With high voltage technologies Matsusada Precision Inc. manufactures various High Voltage amplifiers to meet all requirements from customers.

* We have amplifiers developed specially for electrostatic chuck or PZT. Please ask for details to our sales staff.

This is the image of circuit to amplify input signal.
(fig. 1)

Four-quadrant Output Range

High Voltage amplifier is generally equipped with the "sink" function for output currents that provides constant voltage operation without regard to the type of load whether it is capacitive or conductive. (Fig.2) As it gives fast response, it is an ideal power supply for applications which require AC output.

Matsusada High Voltage amplifiers are all bipolar type and can be operated in full four-quadrant area. (I, II, III, IV area)

  • Vomax: Rated output voltage
  • Iomax: Rated output current
A graph of DC and AC Operating range.
A graph of DC and AC Operating range.
(fig. 2) Voltage and Current operation range

Slew Rate

The responsibility of our high speed amplifier is determined with slew rate (SR). The step responsibility of our amplifier is as shown in fig. 3.

SR = ΔV/μS

In case of output amplitude is smaller the response time become shorter. AMP series reach to greater than SR =700 V/µS at maximum.

This graph explains slew rate. It is defined as the amount of voltage change per unit time for an input signal.
(fig. 3)

Rise Time (step response)

Step response can be indicated with rise time. (fig.4) Usually the rise time of amplifier of response (= bandwidth) fc (Hz) is given by a formula below.

tr ≒ 0.35/fc.

The fall time tf is equals to tr.

This image explains rise time.
(fig. 4)

Frequency Response

Response of Matsusada amplifiers are described as "frequency bandwidth". When swing the output with sinusoidal waveform with rated resistive load, output swing (amplitude) is reduced as input frequency become faster. Frequency response in the specification is the frequency fc is where output swing is 70% (-3 dB). (fig. 5)
In case clear output waveform is required, please select a High Voltage amplifier which has high enough frequency bandwidth against required frequency. In general three to five times more frequency bandwidth for sinusoidal waveform, and about 10 times more for rectangular waveform, is required. In case of insufficient frequency bandwidth the output swing shall be reduced, and also the phase difference be large, so some solutions, such as monitoring output waveform, shall be required.

* 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 graph explains response speed which is defined in the frequency band.
(fig. 5) Declination of output swing by frequency

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.

Important note to utilize the full performance of high speed High Voltage amplifier

Output cable of High Voltage amplifiers is not shielded. If the output cable has some stray capacity against ground (earth ground or metal objects), output voltage will be sinusoidal or stop waveform and extra current will be drawn. As this current draw parallel to load, the following appearance might be happened.

  1. Slew rate or response frequency drop
  2. The waveform is distorted or changed
A conceptual diagram of leak current of High Voltage amplifier.

When there is output stray capacitance C the leak current by C will be as below.

formula
Solution

Make sure to have proper connection to make stray capasitance of High Voltage cable as low as possible.

  1. Keep the length of output cable as short as possible.
  2. Keep the output cable away from floor, desks, or metal objects.
  3. Have no shielding on the output cable.