FaithTech conçoit et fabrique des alimentations électriques à courant continu programmables et des charges électroniques pour les secteurs de l’énergie, de l’industrie, de l’automobile, de l’électronique et de l’aérospatiale.
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In advanced engineering fields, some test applications impose demands far beyond conventional standards — continuous output currents reaching tens of thousands of amperes. Industry research points out that for superconducting magnet excitation, large-scale electrochemical process validation, and reliability testing of new energy vehicle drive systems, “traditional power systems are fundamentally incapable of performing the test tasks.” The core reason: if the required current cannot be established within the specified time window, the test condition itself fails, not just a matter of reduced efficiency.
This insight reveals the fundamental challenge of high-current testing: the upper limit of demand is defined not by standard parameters, but by the physical mechanism of the device under test. For superconducting coil magnetic field testing, only by raising the excitation current from zero to the target value within the prescribed time can an effective superconducting state be established. Similarly, the current density of hydrogen electrolysis systems directly determines the validity of experimental data. Such applications demand capabilities beyond single-unit limits and rely on system-level current expansion solutions.
Industry perspective: The true difficulty of high-current systems is not simply scaling up the numbers, but providing a system solution that is stable, controllable, and safe under real operating conditions.
The following applications share common characteristics: low voltage, high current, and long-duration stable output, representing the core market for high-current power systems:
High-current systems are not simply the superposition of several standard power supplies; they involve a series of system-level engineering challenges. Industry practice shows that the following five dimensions are critical to determining whether a system can be reliably deployed:
| Challenge Dimension | Specific Issue | FTG Series Corresponding Design |
|---|---|---|
| Busbar Voltage Drop Control | Under low voltage, high current conditions, busbar resistance voltage drop is non-negligible and affects output accuracy. | 16-bit high-resolution A/D acquisition, voltage measurement accuracy 0.05% F.S.; remote voltage sense interface for external compensation. |
| Parallel Current Sharing | When multiple units are connected in parallel, uneven output current can cause overload or underload of some units. | Master-slave parallel auto-current sharing: slave units automatically follow the master, each slave independently shares current, total current displayed on the master. |
| Inductive Load Transients | During deceleration or step changes, inductive loads generate reverse energy that may cause overvoltage damage. | CV/CC priority output mode to suppress overshoot; optional energy absorber to sink reverse inductive energy. |
| Long-Term Stability | Long-duration processes require sustained full-load output for many hours or longer. | Constant power output mode maintains set power; sequence function supports complex long-duration waveform programming. |
| Abnormal Condition Protection | In a multi-unit parallel system, any abnormal unit must be quickly isolated without affecting overall output. | Multiple protections: OVP, OCP, OPP, UCP, UVP, OTP and reverse protection; emergency stop control input interface. |
The core of the above challenges is that scaling current specifications is only the starting point; the controllability, consistency, and safety during system deployment are the actual deliverable capabilities customers require.
The FaithTech FTG Series high-power programmable DC power supply is designed for applications requiring wide voltage coverage, high-current output, and flexible system expansion. With broad-range parameter specifications and built-in master-slave parallel function, the FTG Series can meet diverse test requirements from medium power to ultra-high-current systems in either single-unit or multi-unit combined configurations.
FTG Series Core Specifications
| Parameter | Specification Range |
|---|---|
| Output Voltage | 0 – 1500 V |
| Single unit max. current | 0 – 20,000 A |
| Output power | 4 – 600 kW |
| Number of parallel units | Up to 10 units master-slave parallel |
| System max. current (10 units) | Up to 200,000 A (depending on model configuration) |
| A/D resolution | 16-bit high resolution |
| Voltage measurement accuracy | 0.05% F.S. |
| Current measurement accuracy | 0.1% + 0.1% F.S. |
| Communication interface | Multi-interface, SCPI and Modbus dual protocol support |
The FTG Series features a built-in master-slave parallel function, supporting up to 10 same-model power supplies in parallel operation. The operating principle of the parallel system is as follows:
Using the highest-current model as an example, the system output capability after parallel expansion of the FTG Series is shown in the following table:
| Number of Parallel Units | System Max. Current (Example) | Typical Application Scenario |
|---|---|---|
| 1 unit (single) | 20,000 A | Medium-scale electrolysis processes, automotive electronics high-current testing |
| 2 units parallel | 40,000 A | Large SOFC stack testing, connector batch temperature rise validation |
| 3 units parallel | 60,000 A | Superconducting coil magnetic field excitation, industrial electroplating main circuit |
| 5 units parallel | 100,000 A | Large-scale hydrogen electrolyzer system testing, rail transit main circuit simulation |
| 10 units parallel | 200,000 A | Ultra-large superconducting equipment validation, special metallurgical process power supply |
For example, with 3 FTG Series power supplies (20,000 A per unit) in parallel, the total system output current reaches 60,000 A, fully covering test conditions requiring continuous currents above 50,000 A (such as superconducting system magnetic field excitation), while ensuring consistent current sharing and stable system output under the master-slave architecture.
It should be noted that the actual output capability of a parallel system depends on the voltage/current specifications of the selected models, busbar cross-section, and connection methods. Before system deployment, it is recommended to consult the FaithTech technical team about busbar voltage drop compensation to ensure accuracy specifications meet test standards at the system level.
In addition to parallel current expansion, the FTG Series integrates a complete set of functional modules for industrial test and research applications, delivering test flexibility beyond expectations among products with comparable current ratings:
Built-in 16-bit high-resolution A/D converter, voltage measurement accuracy 0.05% F.S., current measurement accuracy 0.1% + 0.1% F.S. The front panel displays voltage, current, and power simultaneously. Analog monitoring output ports for voltage and current allow users to observe real-time output waveforms via oscilloscope, suitable for dynamic response analysis and process recording.
Users can set a target output power along with voltage/current limits; the power supply automatically coordinates output voltage and current regulation to maintain output power at the set value. Adjustable response speed accommodates loads with varying slew rates, particularly suitable for the stringent power stability requirements of electrochemical processes.
Supports programming complex voltage/current waveforms: provides 10 sequence files, each with up to 100 steps, supports looping and cascading calls, enabling arbitrary custom waveforms such as half-sine, trapezoidal, step, etc., meeting the waveform repeatability requirements of standardized test protocols.
To address current/voltage overshoot caused by inductive or capacitive loads during turn-on, the FTG Series offers CV priority (fast voltage establishment, current overshoot suppression) and CC priority (fast current establishment, voltage overshoot suppression) modes, effectively protecting the device under test and avoiding protection triggers or damage due to transient overshoot.
The power supply automatically reduces output voltage as output current increases, based on a preset internal resistance value, accurately simulating the internal resistance characteristics of a real battery — suitable for BMS testing, battery pack charge/discharge simulation, and other applications.
Standard equipped with Faith Power demonstration platform, supporting basic PV simulation for photovoltaic inverter testing; optional Faith Solar PV Matrix simulation software supports 5 mainstream test standards including EN50530, Sandia, etc., can simulate series/parallel module parameter variations, cloud shading conditions, meeting complete MPPT static and dynamic performance test requirements.
During deceleration, motors and other inductive loads feed energy back to the power supply, causing bus overvoltage. The FTG Series offers an optional parallel energy absorber that sinks reverse energy during testing, preventing overvoltage damage while shortening braking distance and improving system dynamic performance. The absorber power is recommended to exceed 20% of the power supply's power, and multiple absorbers can be paralleled for expansion.
Standard with multiple communication interfaces, supporting both SCPI and Modbus protocols; can be flexibly integrated into automated test systems (ATS). Users configure interface parameters via the menu without additional hardware adaptation, significantly reducing system integration costs.
Includes virtual instrument PC software supporting real-time test data acquisition, curve generation, data export, and test report printing, facilitating data management needs in laboratories and engineering sites.
Current high-current system solutions on the market are typically delivered as preconfigured racks, making it difficult for users to expand current specifications or change application scenarios based on existing hardware. The FTG Series adopts a different design philosophy:
The demand for high-current test systems from cutting-edge applications such as superconducting excitation, hydrogen electrolysis, and new energy drive systems is no longer a niche scenario, but is becoming a mainstream component of industry test capabilities. The core of this demand lies not only in current magnitude, but also in whether the system can deliver stable output, parallel current sharing, complete protection, and smooth integration with automated test platforms.
The FaithTech FTG Series programmable DC power supply, through its built-in master-slave parallel architecture, seamlessly expands single-unit 20,000 A capability to a system-level 200,000 A, while providing complete engineering support in measurement accuracy, functional richness, and communication interface standardization.
For detailed FTG Series model specifications, parallel system proposal guidance, or product demonstration requests, please visit the FaithTech official product page or contact our technical support team.