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Bipolar power supplies (Low Voltage Amplifiers)

Bipolar power supply is a power supply that can operate in all four quadrants. While general DC power supplies are unipolar, capable of operating in one or three quadrants, bipolar power supplies are capable of Source (output) and Sink (suction) operations in the positive (+) and negative (-) voltage regions, respectively. For more information, please see "What is a Bipolar Power Supply? (Basic Knowledge)".

four quadrants

Matsusada presicion's bipolar power supplies/Low Voltage amplifiers are four-quadrant bipolar power supplies with "fast response" and "compactness". We offer a total of 12 series, including ultra-fast response models with operating speeds ranging from DC to 1MHz, and models with function generators.

They are ideal for evaluation tests, research and development, and surface treatment of inductors such as coils and transformers, capacitors, dielectrics, solar cells, batteries, and various motors. For more information on bipolar power supply/power amplifier (amplifier) terminology, usage, and precautions, please see "How to Use the Amplifier and Its Notes".

Higher voltage bipolar power supplies/power amplifiers and higher voltage pulse power supplies are listed in High Voltage Amplifiers/High Voltage Pulse Power Supplies.

DJOPF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DJOPF series

Bandwidth
DC to 30 kHz
Voltage range
±10 to ±60 V
Power
50 W, 60 W
Compact Bipolar power supply

Corresponding to the digital interface and remote control

DOKF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DOKF series

Bandwidth
DC to 120 kHz
Voltage range
±20 to ±80 V
Power
400 W
High Speed Four-Quadrant Bipolar Power Supply

High speed response of DC to 120 kHz, Programmed wave is to output in high quality

DOEF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DOEF series

Bandwidth
DC to 200 kHz
Voltage range
±20 to ±60 V
Power
0.4 to 1.2 kW
High performance Bipolar power supply

Sequence programming function installed, Function generator integrated, High speed of DC to 200 kHz

DOPF series

DOPF series

Bandwidth
DC to 30 kHz
Voltage range
±5 to ±300 V
Power
0.15 to 2 kW
Four-quadrant high speed bipolar power supply

Function generator integrated

DOSF series

DOSF series

Bandwidth
DC to 200 kHz
Voltage range
±20 to ±60 V
Power
0.15 to 2 kW
Four-quadrant bipolar power supply with function generator

Ultra fast response of DC to 200 kHz

DJOP series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DJOP series

Bandwidth
DC to 30 kHz
Voltage range
±10 to ±60 V
Power
50 to 60 W
Benchtop Bipolar power amplifier

For-quadrant action, Compact Benchtop size of 5.5-inch width

DHOP series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DHOP series

Bandwidth
DC to 100 kHz
Voltage range
±20 to ±45 V
Power
225 to 240 W
Four-quadrant fast response
Bipolar power amplifier

Compactness and high speed response, Various types of input wave forms

DOP series

DOP series

Bandwidth
DC to 30 kHz
Voltage range
±5 to ±300 V
Power
0.15 to 2 kW
4-quadrant Bipolar power amplifier

Wide lineup of 42 models, available for CV/CC mode

DOS series

DOS series

Bandwidth
DC to 200 kHz
Voltage range
±20 to ±60 V
Power
0.15 to 2 kW
High speed Bipolar power amplifier

Four-quadrant action, CV/CC mode are available, Ultra high speed response of DC to 200 kHz

DOL series

DOL series

Bandwidth
DC to 15 kHz
Voltage range
±18 to ±120 V
Power
270 to 640 W
Bipolar power amplifier

DC to 10 kHz or 15 kHz, 270 W to 640 W, ±18 V and ±120 V

DOA series

DOA series

Bandwidth
DC to 1000 kHz
Voltage range
±75 to ±150 V
Power
75 to 300W
Ultra High Speed Bipolar amplifier

4-quadrant action, High Speed Response of DC to MAX. 1 MHz

DOC series

DOC series

Bandwidth
DC to 10 kHz
Voltage range
±0.5 to ±1 kV
Power
50 W, 100 W
High voltage Bipolar power amplifier

High-speed response, 10 kHz, Compact and high power, High voltage output, ±500 V and ±1000 V

Discontinued

DOD series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DOD series

Bandwidth
±10 to ±120 V
Current
±10 to ±100 A
Power
0.6 to 2.4 kW
Ultra-low ripple Bipolar amplifier

High-performance bipolar power supply for exclusive use of the electromagnet

Discontinued

DOM series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

DOM series

Bandwidth
±6 to ±100 V
Current
±10 to ±125 A
Power
0.75 to 1 kW
Compact size and Versatile Bipolar power supply

The compact size of height 3U, Source and sink of current of ±125 A maximum are available

Examples of bipolar power supply applications

We will offer applications based on Matsusada achievement.

What is a Bipolar Power Supply?

It is a four-quadrant bipolar power supply to source and sink the power. The power supply is available with two modes of constant voltage (CV) and constant current (CC). By taking advantage of built-in function generators, it is also possible for certain series of the bipolar power supplies to generate basic input waveforms including a sine wave and a square wave.


Moreover, arbitrary waves are available as well.
For more information, please see the "Technical Knowledge" page on our site.

INDEX



Automobiles and vehicles


Development and evaluation of bidirectional inverters and converters




In recent years, vehicle-mounted power supplies have been shifting from 12 volt outputs to 48 volts. To keep abreast of this trend to higher voltages, including those in quasi-hybridized vehicles, the design of various automotive components has had to be reviewed. In order to cope with the demand to save more energy, we are required to develop such bidirectional devices as DC/DC devices to promote the storage efficiency of regenerated electric power. Furthermore, as the computerization of automobiles advances, there is a rapidly increasing need for noise tests including cranking waveforms of vehicle-mounted electrical components. Bipolar power supplies are the most suitable candidates for evaluating the noise, heat and response of these devices and components. In addition, the use of high voltages is also essential for the evaluation of EVs and HEVs. Matsusada Precision offers a wide lineup of bipolar power supplies to meet the needs of each user.


Performance required in this application:
High powerHigh speedHigh voltage



Development and evaluation of bidirectional inverters and converters






Point Here is why Matsusada bipolar power supplies are selected


Matsusada offers 147 models of bipolar power supplies, including high-voltage and high power models, which cannot be matched by our competitors. This makes it possible for customers to select the right power supply that is best suited to their individual applications. We have a power supply which can deliver up to 2000 W from one unit and that makes it possible to use a compact configuration when high power is needed. Competitors' power supplies can only deliver about 400 W maximum from one unit.





Development and evaluation of magnetic materials for motors




Bipolar power supplies are also used to evaluate the hysteresis characteristics of magnetic materials. Hysteresis is a characteristic which has a large effect on the efficiency of EV motors. It is necessary to use a high-speed bipolar power supply to measure hysteresis characteristics smoothly and accurately.


Performance required in this application:
High speedHigh voltage





Development and evaluation of magnetic materials for motors 1

Development and evaluation of magnetic materials for motors 2






Evaluation of ignition coils




Evaluation of the cranking waveform during the rotation of the starter motor using a simulator is an essential method for testing ignition coils. A high-speed bipolar power supply that is capable of providing a variety of waveforms is required to test modern automobiles in which various electronic devices are incorporated in a complicated way. Some of Matsusada Precision's bipolar power supplies are equipped with a memory function so that the necessary waveforms can be pre-stored in memory and recalled when needed for testing.


Performance required in this application:
High speed





Evaluation of ignition coils 1

Evaluation of ignition coils 2






Evaluation of the loss of copper and iron in the reactor of a large transformer




Bipolar power supplies are often used to evaluate the large transformers mounted on special vehicles. These transformers have copper windings. When a high-frequency voltage is used, copper loss occurs due to the so-called skin effect. In small transformers, the amount of copper lost is negligible. But it is possible for larger transformers to save energy by reducing that loss. Bipolar power supplies are used for selecting the type of wires for reactors to reduce the loss of copper and iron.


Performance required in this application:
High power




Evaluation of the loss of copper and iron in the reactor of a large transformer




Development of current sensors and shunt resistors




As the popularity of HEV and EV automobiles, including special vehicles, increases the technology for monitoring electric current is becoming more important. Reduction of electric current waste is becoming a necessity, in order to extend the travel distance and travel time of automobiles. To achieve this, it is essential to improve the performance of the electric current sensors which monitor the current flow from the batteries to various electrical and electronic devices in automobiles. Bipolar power supplies are well suited for evaluating the accuracy, response speed and temperature of electric current sensors.


Performance required in this application:
High powerHigh speedHigh voltage




Development of current sensors and shunt resistors




Development and evaluation of motors and peripheral equipment




In evaluating motors using a general purpose variable power supply, the power supply might be damaged or fail due to a counter electromotive force when evaluating some items. Therefore, the development and evaluation of motors have been performed using a combination of electronic loads and a variable power supply. Since a bipolar power supply can output in all four quadrants, it is not necessary to combine electronic loads. However, until now, high power bipolar power supply has not been available, so only motors with a small power rating could be evaluated. Matsusada Precision has developed a compact, high power bipolar power supply, thus making it possible to also evaluate large motors.


Performance required in this application:
High powerHigh speedHigh voltage





Development and evaluation of motors and peripheral equipment 1

Development and evaluation of motors and peripheral equipment 2






Evaluation of electromagnetic valves




The operating speed of electromagnetic valves affects the fuel consumption of automobiles. Our bipolar power supply is capable of delivering a high-speed response to test the operation of electromagnetic valves.


Performance required in this application:
High speed




Evaluation of electromagnetic valves




Development and evaluation of connectors




Electronically-controlled automobiles contain a large number of cables and connectors arranged in a complicated fashion. Failure to evaluate noise and heat can lead to a serious accident. Bipolar power supplies are used to simulate various noise sources.


Performance required in this application:
High powerHigh speed




Development and evaluation of connectors




Simulation of cranking waveforms in special vehicles




It is necessary to simulate the cranking waveforms of different automobiles, including special vehicles. It is possible to simulate the cranking waveforms of various types of special vehicles using high power or high-speed bipolar power supply.


Performance required in this application:
High powerHigh speed





Simulation of cranking waveforms in special vehicles

Simulation of cranking waveforms in special vehicles






General electronic/electrical products



Development and evaluation of inverters and converters




Inverters and converters are widely used in a variety of industries, including home electric appliances, industrial equipment, and automobiles. Bipolar power supplies are used in the evaluation of such products, for example, when testing variations in the input and making measurements of efficiency.


Performance required in this application:
High powerHigh voltage




Development and evaluation of inverters and converters




Development and evaluation of motors




If a motor is evaluated using a general purpose variable power supply, it could be damaged or fail due to the counter electromotive force. Bipolar power supplies can absorb any counter electromotive force which might occur while evaluating motors.


Performance required in this application:
High power




Development and evaluation of motors




Magnetic field generation




Bipolar power supplies are also used in evaluating magnetic sensors like hall devices to measure the magnetic characteristics of semiconductors with next-generation memory Magnetoresistive random-access memory (MRAM) and to test the operation of electromagnetic valves.


Performance required in this application:
High powerHigh speed




Magnetic field generation




Development and evaluation of LEDs, power LEDs and Laser diodes




Bipolar power supplies are used to turn LED or LD devices on and off at high speed and perform long-term life tests while suppressing heat buildup.


Performance required in this application:
High speed




Development and evaluation of LEDs, power LEDs and Laser diodes






PointHere is why Matsusada bipolar power supplies are selected


The power supplied to optical semiconductors is relatively small. Our benchtop bipolar power supply, available only from Matsusada, can be used for this application. There is no need for large power supply equipment. Our benchtop bipolar power supply makes it possible to perform simple tests that require 60 W or less.





Development and evaluation of connectors




There is a growing number of cases where the thermal efficiency of connectors can be improved to save energy. Bipolar power supplies respond at high speed, allowing thermal evaluations before and immediately after the application of a voltage.


Performance required in this application:
High powerHigh speed




Development and evaluation of connectors




Development and evaluation of batteries and chargers




Bipolar power supplies that are capable of outputting in four quadrants are widely used to evaluate the performance of batteries, to simulate battery behavior and to evaluate battery chargers.


Performance required in this application:
High powerHigh speed




Development and evaluation of batteries and chargers




Simulation of output waveforms




Peripheral equipment such as home electric appliances and other electrical devices generally require specific waveforms. It is necessary to check whether or not home electric appliances and other electrical devices will fail to operate normally if waveforms from external sources are distorted. Bipolar power supplies are highly suitable for such testing. By simulating and outputting waveforms that can cause malfunctions, it is possible to check the robustness of home electric appliances and other electrical devices.


Performance required in this application:
High speed




Simulation of output waveforms





Plating industry



Periodic reverse (PR) electroplating and anodizing




PR electroplating is a highly accurate plating method. After the first plating, a negative voltage is applied to remove any protrusions or dirt from the plated surface. This procedure is repeated to remove any edges from the plated surface, making it possible to plate the surface of the object accurately. Since bipolar power supplies are capable of outputting in four quadrants, only one power supply is required instead of using two units. The cycle time for PR electroplating can be improved by using Matsusada's high power, high-speed bipolar power supplies. In anodizing, if a low voltage at a particular frequency is applied to an object to be plated, the speed of chemical reaction can be increased. When there are a variety of objects to be plated, and since different objects each have
their own frequency at which the chemical reaction can be increased, using the appropriate frequency increases the anodizing efficiency.


Performance required in this application:
High powerHigh speed




Periodic reverse (PR) electroplating and anodizing





PointHere is why Matsusada bipolar power supplies are selected


The best frequency to apply depends on the size and the surface area of the objects to be plated. Matsusada Precision offers a wide lineup of bipolar power supplies to meet nearly all frequency needs.






Ripple testing of capacitors




Broadband bipolar power supplies are available for ripple testing by responding to higher frequencies. They are fully equipped with safety functions including sinking current. Aside from that, the bipolar power supplies which can add AC to DC are suitable for evaluation tests and aging.





function generator

graph






I-V characteristic evaluation of photovoltaic panels




The bipolar power supplies are used for I-V characteristic measurement by sinking current, which is like electronic loads, to monitor the voltage/current at the time.
They are also suitable for field tests using solar power.





photovoltaic panels

graph






Waveform amplification of digital function generators




As the four-quadrant bipolar power supplies provide the output of the amplified waveform created by the function generator with no change, they can be applied to processing such as pulse plating and surface treatment.





function generator

graph




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