KIKUSUI PXB Series Bidirectional High-Capacity DC Power Supply
The KIKUSUI PXB Series combines programmable DC source operation and regenerative sink operation in a single high-capacity power supply for battery, EV, inverter, converter, and high-power electronics evaluation.
The current series includes a 10 kW / 50 V model and six 20 kW models covering source voltages from 50 V to 1500 V. Positive current supplies power to the DUT, while negative current absorbs power from the DUT and regenerates it to the facility AC line. CV, CC, and CP operating modes support a broad range of programmable power-test conditions.
10 kW / 20 kW
High-capacity bidirectional power in a compact 3U platform
Up to 1500 V
Seven current models from low-voltage/high-current through high-voltage testing
Source + Regeneration
Supply or absorb DC power with over 90% regenerative efficiency at rated load
Up to 500 kW
Parallel operation of up to 25 units
SEAM mode, programmable sequence operation, pulse and sine functions, configurable I-V characteristics, variable internal resistance, selectable response and slew rate, synchronized operation, LAN/USB/RS232C, isolated analog control, and PLC-ready digital I/O support integration into advanced R&D, validation, and automated test systems.
Bidirectional Source and Sink Operation
One PXB unit can source power to the DUT and absorb power from the DUT. Sink energy is converted and regenerated to the facility AC line for on-site reuse.
CV / CC / CP Control
Constant-voltage, constant-current, and constant-power operation provide programmable control for source and regenerative test conditions.
SEAM Mode
SEAM mode allows current to transition between source and sink directions without changing the voltage setting, helping suppress overshoot and undershoot during battery charge and discharge transitions.
Over 90% Regenerative Efficiency
At rated load, regenerative efficiency exceeds 90%. Regenerated energy is returned to the facility AC line for on-site consumption rather than being dissipated only as heat.
20 kW in 3U
The 20 kW PXB models combine high output capacity with a compact 3U rack form factor for high-density power-test systems.
Up to 1500 V
Voltage classes from 50 V through 1500 V support low-voltage, high-current devices as well as high-voltage EV and power-conversion systems.
Fast Dynamic Response
Output-voltage rise and fall times are typically 10 ms. Current rise/fall under the specified FAST CC condition is typically 5 ms, with charge/discharge switching typically 10 ms.
Stable Capacitive-Load Operation
Adjustable response and slew-rate settings help suppress oscillation and overshoot when testing DUTs with significant capacitive characteristics.
Variable Internal Resistance
In CV operation, programmable internal resistance can modify output voltage according to current, enabling simplified simulation of rechargeable batteries, wiring, and other resistance-dependent DC sources.
Programmable I-V Characteristics
Arbitrary I-V curves can be defined using 3 to 100 points in CV or CC operation for simulation of batteries and other voltage-current characteristics.
Sequence, Pulse, and Sine Functions
Up to 30 sequence programs and 10,000 total steps are supported. Pulse and sine functions provide additional programmable dynamic output profiles.
Up to 500 kW Parallel Expansion
Up to 25 units can operate in parallel under centralized master control. Consult KIKUSUI when configuring more than ten parallel units.
Integrated System Interfaces
LAN, USB, RS232C, isolated analog I/O, and configurable digital I/O support integration with PCs, measurement systems, and both sink- and source-type PLC interfaces.
EV battery pack charge and discharge evaluation
Rechargeable battery cycling and validation
Battery and DC-source simulation
Traction inverter and motor-inverter evaluation
Bidirectional DC/DC converter evaluation and aging tests
On-board charger and high-voltage DC bus evaluation
Energy storage system power-conversion testing
High-power DC power-electronics R&D and validation
Automated source/sink endurance and production testing
PXB Series Model Comparison
| Specification | PXB10K-50 | PXB20K-50 | PXB20K-100 | PXB20K-250 | PXB20K-500 | PXB20K-1000 | PXB20K-1500 |
|---|---|---|---|---|---|---|---|
| Rated Power | ±10 kW | ±20 kW | ±20 kW | ±20 kW | ±20 kW | ±20 kW | ±20 kW |
| Rated Source Voltage | 0–50 V | 0–50 V | 0–100 V | 0–250 V | 0–500 V | 0–1000 V | 0–1500 V |
| Sink Operating Voltage | 3–50 V | 3–50 V | 7–100 V | 15–250 V | 10–500 V | 20–1000 V | 30–1500 V |
| Rated Current | ±400 A | ±800 A | ±400 A | ±200 A | ±120 A | ±60 A | ±30 A |
| Maximum Settable Voltage | 52.5 V | 52.5 V | 105 V | 262.5 V | 525 V | 1050 V | 1575 V |
| Maximum Settable Source Current | +420 A | +840 A | +420 A | +210 A | +126 A | +63 A | +31.5 A |
| Maximum Settable Sink Current | -420 A | -840 A | -420 A | -210 A | -126 A | -63 A | -31.5 A |
| Internal Resistance Range | 0–126 mΩ | 0–63 mΩ | 0–315 mΩ | 0–1575 mΩ | 0–5250 mΩ | 0–21000 mΩ | 0–63000 mΩ |
| Nominal Chassis Dimensions | 430 × 128 × 720 mm | 430 × 128 × 720 mm | 430 × 128 × 720 mm | 430 × 128 × 720 mm | 430 × 128 × 720 mm | 430 × 128 × 720 mm | 430 × 128 × 720 mm |
| Weight | Approx. 28 kg | Approx. 41 kg | Approx. 40 kg | Approx. 39 kg | Approx. 38 kg | Approx. 37 kg | Approx. 37 kg |
Rated voltage and rated current are limited by the applicable rated output power. Sink operating voltage indicates the voltage range over which rated sink current can be applied.
Common Control and System Specifications
| Operating Modes | CV / CC / CP |
|---|---|
| Bidirectional Operation | Source and regenerative sink |
| SEAM Mode | Seamless bidirectional current control without changing the voltage setting |
| Regenerative Efficiency | Over 90% at rated load |
| Regeneration Type | On-site regeneration to AC line |
| Voltage Rise / Fall Time | 10 ms typical |
| CC Current Rise / Fall Time | 5 ms typical under specified FAST response condition |
| Charge / Discharge Switching | 10 ms typical |
| Response | FAST / SLOW |
| Slew Rate | Selectable in five steps; model-dependent |
| Sequence Programs | Up to 30 |
| Sequence Steps | Up to 10,000 total steps |
| Sequence Step Time | 1 ms to 3,600,000 s |
| I-V Characteristic | CV / CC; 3 to 100 programmable points |
| Pulse Function | CV / CC; 1 Hz to 1000 Hz |
| Sine Function | CV / CC; 1 Hz to 1000 Hz |
| Parallel Operation | Up to 25 units / 500 kW; consult KIKUSUI for more than 10 units |
| Standard Communications | LAN / USB device & host / RS232C |
| LAN Protocols | SCPI-RAW / SCPI-Telnet / HiSLIP / VXI-11 |
| LXI | LXI Version 1.5 |
| Analog Control | Isolated external CV and CC/CP control with VMON / IMON |
| Digital I/O | Configurable isolated I/O compatible with current-sink and current-source PLC outputs |
| AC Input Options | 200–240 Vac or 380–480 Vac nominal, three-phase |
