Achieve Ultra-Stable Magnetic Fields with Our Excitation Power Supplies – Cryomagtech provides high precision excitation power supply solutions for both standard electromagnets and superconducting magnets. Our fully digital systems deliver low-noise, bipolar constant current output with fast feedback control, ensuring your experiments get precise, reliable magnetic fields every time.
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1. Pain Points & Solutions
Modern research labs and R&D teams often struggle with magnet power supplies that are not up to the task. Here are some common pain points and how Cryomagtech addresses them:
- Problem: Unstable current and high ripple lead to inconsistent magnetic fields and unreliable data. Solution: Our power supplies feature ultra-low ripple (≤1 mA) and drift as low as 5 ppm/hour, keeping your magnetic field rock-solid for more accurate results.
- Problem: Standard supplies can’t smoothly handle bipolar or zero-crossing currents, causing dangerous overshoots or manual polarity swaps. Solution: Cryomagtech supplies offer true four-quadrant bipolar output, allowing seamless current reversal through zero with no spikes. You get smooth, continuous magnetization and demagnetization without intervention.
- Problem: Large inductive magnets risk coil damage from quenches or power failures, and many supplies lack adequate protection. Solution: Our systems include comprehensive protection: automatic quench detection, emergency energy dump circuits, overcurrent/overheat shutdown, and power-failure energy absorption – all to safeguard your superconducting coils and electromagnets.
- Problem: It’s difficult to control field strength precisely or automate complex current ramps with basic power sources. Solution: Cryomagtech integrates closed-loop feedback (with optional built-in gaussmeter) so you can set field intensity directly. Programmable ramp profiles and USB/LAN remote control let you automate multi-segment charging, sweeps, and experiments with ease.
2. Core Product Advantages
Our Excitation Power Supply line is engineered from the ground up to meet the exacting demands of university labs and high-tech industries. Here are some core advantages that set Cryomagtech apart:
- Ultra-Stable, Low-Noise Output: Delivers highly stable DC current with <0.001%/h drift and ripple down to the milliamp level. This superior stability means more reliable experimental data and repeatable results even over long test periods.
- Bipolar & Four-Quadrant Operation: All models support true ± current output without manual switching. Enjoy smooth zero-crossing and bidirectional current flow, so you can easily magnetize or demagnetize coils and run AC field simulations with one device.
- Programmable & Precise Control: Built-in digital controllers (20–24-bit DAC resolution) allow fine set-point control and programmable ramping of current or voltage. Define multi-step excitation profiles, apply closed-loop field control, and interface with PC software for automation and data logging.
- Comprehensive Protection & Safety: Each supply includes intelligent safeguards – quench detection, fast current decay circuits, over-temperature and power-loss protection, and emergency stop. These features protect your expensive magnets and ensure safe, continuous operation in critical experiments.
- Wide Power Range & Modular Design: Cryomagtech offers solutions from benchtop high precision supplies (5–120 A) up to cabinet-type superconducting magnet supplies (up to 1000 A). This modular product range means we can support everything from small Helmholtz coils to large superconducting magnet systems, all with a consistent user interface and reliability.
Power Supply
Superconducting Power Supply
3. Technical Specifications
We provide two complementary product categories under our Excitation Power Supply line – High Precision Series and Superconducting Magnet Series – each tailored to different current and voltage needs. Below are key technical specifications for each series:
3.1 High Precision Excitation Power Supply – Models & Specs
| Series | P5 | P10 | P15 | P20 | P70 | P90 | |||||
| Model | P5-40 | P5-80 | P10-40 | P10-80 | P15-40 | P15-80 | P20-40 | P20-80 | P70-50 | P90-60 | |
| Input | Wiring Type | Single-phase, three-wire | Three-phase, five-wire | ||||||||
| Input Voltage | 220±10% VAC | 380±10% VAC | |||||||||
| Power (KVA) | 0.3 | 0.5 | 0.5 | 1 | 0.75 | 1.5 | 1 | 2 | 4.5 | 6.5 | |
| Output | Output Type | Bipolar Constant Current, Four-Quadrant Operation | |||||||||
| Control Mode | Digitally Controlled Linear Regulation | ||||||||||
| Current Range | ±5A | ±10A | ±15A | ±20A | ±70A | ±90A | |||||
| Rated Voltage | ±40V | ±80V | ±40V | ±80V | ±40V | ±80V | ±40V | ±80V | ±50V | ±60V | |
| Current Stability | Standard version: better than ±25 ppm; High-stability version: better than ±5 ppm | ||||||||||
| Line Regulation | 1.0 × 10-5 Ir (measured as output current variation under ±10% change of supply voltage) | ||||||||||
| Load Regulation | 2.0 × 10-5 Ir (measured as output current variation under ±10% change of load voltage Ur) | ||||||||||
| Ripple RMS | 1mA | 1mA | 1mA | 1mA | 2mA | 2mA | |||||
| Output Setting | Setting Resolution | 20 bit | |||||||||
| 0.01mA | 0.02mA | 0.03mA | 0.04mA | 0.13mA | 0.17mA | ||||||
| Output Accuracy | Set value ±0.02% ±2 mA | ||||||||||
| Current Slew Rate | 0.0017 – 0.5 Ir/s (Ir represents the rated maximum output current) | ||||||||||
| Factory Default Slew Rate | 0.5A/s | 1A/s | 1.5A/s | 2A/s | 7A/s | 9A/s | |||||
| Load | Load Resistance | ≥1.8Ω | ≥1.8Ω | ≥1.0Ω | ≥1.0Ω | ≥0.6Ω | ≥0.6Ω | ≥0.5Ω | ≥1.5Ω | ≥0.1Ω | ≥0.1Ω |
| Load Inductance | 0 ~ 1H | ||||||||||
| Cooling | Ambient Temperature | 0 ~ 30°C | 0 ~ 40°C | ||||||||
| Cooling Method | Air cooling | Water cooling | |||||||||
| Cooling Capacity | \ | 1KW | 1KW | ||||||||
| Flow Rate | \ | 3 L/min | |||||||||
| Interface Type | \ | Stainless steel, 1/4 inch BSP external thread | |||||||||
| Inlet Water Temperature | \ | 19 ~ 23°C | |||||||||
| Cable | Input Cable Diameter | Standard 10 A power cable | 4 mm2 | ||||||||
| Output Cable Diameter | ≥2.5mm2 | ≥4mm2 | ≥35mm2 | ||||||||
| Dimensions | W × L × H | 450*610*190 | 600*700*1300 | ||||||||
| Desktop Unit | Cabinet Unit | ||||||||||
| Weight | 20kg | 21kg | 20kg | 21kg | 20kg | 21kg | 20kg | 21kg | 115kg | 115kg | |
| Built-in Gaussmeter | Measuring Range | ±30000.00Gs | |||||||||
| Gaussmeter | Resolution | 0.01Gs | |||||||||
| Optional | Low-noise version | ±0.05Gs | |||||||||
High Precision Excitation Power Supply Series Highlights
High Precision Series Highlights: These bipolar constant current supplies are ideal for precision lab work. All models feature continuous zero-crossing output (no relay switching) and support dual operating modes: current mode and magnetic field mode (with an external or built-in gaussmeter). Efficiency is ≥90% across the range, with 20-bit resolution on output setting. The smaller models (P5–P20) run on standard single-phase power and are air-cooled bench units, while higher-power models (≥70 A) use three-phase input and water cooling to maintain stability. Despite their different sizes, each model provides an intuitive touchscreen interface and USB/RS-232 connectivity for remote control.
3.2 Superconducting Magnet Power Supply – Models & Specs
| Item | SP120-8-5Q | SP240-8-5Q | SP360-8-5Q | SP500-8-5Q | SP1000-8-5Q | |
| Input | Phase | Single-phase | Three-phase five-wire | |||
| Rated Voltage | 220±10% VAC | 380±10% VAC | ||||
| Power | 1500 VA | 3000 VA | 4500 VA | 7500 VA | 15000 VA | |
| Output | Output Type | Bipolar constant current, four-quadrant | ||||
| Output Control Mode | Digitally set linear regulation control | |||||
| Output Current | ±120 A | ±240 A | ±360 A | ±500 A | ±1000 A | |
| Output Voltage | ±8/5 V | |||||
| Load Inductance | 0–100 H | |||||
| Stability | ±15 ppm/h (after 30 min warm-up) | |||||
| Effective Ripple Value | 2 mA | 4 mA | 6 mA | 8 mA | 15 mA | |
| Output Settings | Setting Resolution | 20 bit | ||||
| Output Accuracy | Setting 0.02% ±3 mA | Setting 0.02% ±5 mA | Setting 0.02% ±8 mA | Setting 0.01% ±10 mA | Setting 0.01% ±10 mA | |
| Ramp Rate | 0.0007–120 A/s | 0.0014–240 A/s | 0.0021–360 A/s | 0.003–500 A/s | 0.006–1000 A/s | |
| Voltage Setting Resolution | 0.1 V | |||||
| Voltage Accuracy | Setting 0.5% ±0.1 V | |||||
| Display | Current Resolution | 24 bit | ||||
| Current Accuracy | Reading 0.05% ±5 mA | Reading 0.05% ±10 mA | Reading 0.05% ±15 mA | Reading 0.05% ±15 mA | Reading 0.02% ±10 mA | |
| Voltage Resolution | 24 bit | |||||
| Voltage Accuracy | Reading 0.2% ±100 mV | |||||
| Refresh Rate | 1 time/s | |||||
| Computer Interface | Interface Type | USB, LAN | ||||
| Interface Form | Type-B (USB), RJ45 (LAN) | |||||
| Read Speed | 5 times/s | |||||
| Superconducting Heater Switch (Optional) | Current | 10–1200 mA (set by 12-bit DAC) | ||||
| Current Accuracy | Setting 0.2% ±3 mA | |||||
| Voltage | 3–20 V | |||||
| Connector Type | Aviation Plug XS16J4A | |||||
| Operating Temperature | 0–40 ℃ | |||||
| Cooling Method | Forced Air Cooling (Speed Controlled by Power) | Water Cooling 3 L/min | ||||
| Power Cable Parameters | Input Wire Diameter (mm²) | Standard 10A Power Cable | Standard 16A Power Cable | Standard 25A Power Cable | ≥4 | ≥10 |
| Output Wire Diameter (mm²) | ≥25 | ≥50 | ≥80 | ≥150 | ≥300 | |
| Dimensions | W×H×D（mm） | 482.6×177×530 | 482.6×444.5×530 | 482.6×533×530 | 482.6×533×580 | 482.6×680×530 |
| Weight | 30 kg | 60 kg | 90 kg | 150 kg | 300 kg | |
Superconducting Magnet Power Supply Series Highlights
Superconducting Series Highlights: The SP Series is built for superconducting magnet systems and other high-current applications. Each model utilizes a hybrid power topology – a switching pre-regulator and a linear final stage – to achieve high efficiency and ultra-low noise at currents up to 1000 A. Key features include automatic constant-voltage to constant-current transition (critical for large inductive loads), intelligent polarity reversal (set a negative current and the supply handles reversing switch operation automatically), and multi-segment programmable ramps for safe charging/discharging of superconducting coils. All SP units support parallel operation (via RS-485) for even higher current needs, and come standard with both USB and LAN interfaces for control and monitoring. Front-panel touchscreen displays give real-time readouts of current, voltage, and magnet voltage, while built-in quench detection and external interlock inputs provide peace of mind when energizing superconducting magnets. (Note: SP120 and SP240 operate on single-phase 220V; higher models require 3-phase 380V input.)
4. Application Scenarios
Our excitation power supplies empower a wide range of applications in science and industry. If your work involves precise magnetic fields or high-current electromagnets, Cryomagtech has the solution. Typical use cases include:
- University & Research Labs: Driving electromagnets for physics experiments, material science (Hall effect, magnetoresistance, magnetic characterization), and advanced research requiring stable magnetic fields. For example, seamlessly sweep fields for Hall measurements or hold a constant field for magnetization studies – all with confidence in stability and safety.
- Superconducting Magnet Systems: Energizing superconducting solenoids for NMR/MRI systems, high-field laboratory magnets, or particle accelerator components. Our SP Series excels in charging large magnets with precise current ramp control and handling persistent-mode operations, complete with quench protection.
- Industrial R&D and QC Testing: Providing controlled magnetic fields in industrial research settings – such as sensor calibration (e.g. Gaussmeter/fluxgate calibration using Helmholtz coils), magnetic shielding tests, or quality control of magnetic materials. The High Precision series offers fast feedback and programmable automation, making it easy to integrate into automated test setups and cycle through test profiles.
- Magnetic Field Simulation & Prototyping: Serving as a programmable high-current source for simulating dynamic magnetic environments. With the ability to source or sink current (4-quadrant), our supplies can drive magnetic field vibration exciters or AC magnetic field setups, useful in electromagnetic vibration testing and prototyping of novel magnet devices.
5. Customer Testimonials & Trust
Our customers’ success stories speak to the reliability and performance of Cryomagtech. We’re proud to be trusted by leading institutions and companies around the world:
“The stability of Cryomagtech’s power supply is a game-changer for our experiments.”
– Dr. Jane S., Physics Department, Top EU University.
After upgrading to the Cryomagtech precision supply, Dr. Jane’s lab saw a 20% improvement in measurement repeatability for their Hall effect and MR experiments. The ultra-low drift meant fewer recalibrations and more productive use of lab time.
“Our superconducting magnet system now runs flawlessly.”
– Lab Director, National Magnet Lab (USA).
“We use the SP Series for a 9 Tesla superconducting magnet. The automated ramping and quench protection have given us complete confidence during magnet charge/discharge. Even in the event of a sudden quench, the energy dump engages perfectly – saving our magnet on two occasions. Cryomagtech delivered on every promise.”
“Reliable and easy to integrate into our setup.”
– R&D Engineer, Advanced Materials Corp.
“Unlike our old supply, the Cryomagtech unit interfaces seamlessly with our control software via LAN. We set up custom current profiles for material testing, and the system holds the current rock-steady. Plus, the support team helped us fine-tune our configuration quickly. We couldn’t be happier with the performance and service.”
These are just a few examples. With clients in more than 20 countries and over 50 Cryomagtech systems installed worldwide across North America, Europe, and Asia, researchers and engineers consistently report improved experiment outcomes and peace of mind. Our dedication to quality and support has earned us long-term partnerships in the scientific community.
6. About Us & Brand Credibility
Cryomagtech is a global leader in cryogenic and magnetic field technology with over 20 years of engineering expertise. Our company originated from a passionate research team (“Cryomag” stands for Cryogenics & Magnetics) and has grown into a trusted manufacturer of advanced laboratory equipment. We pride ourselves on blending innovation with reliability:
- Rich Industry Experience: Our team has designed magnet power systems and cryogenic instruments for top-tier labs and enterprises worldwide. This experience means we understand the unique challenges of magnetic experimentation – and we build solutions to overcome them.
- Proven Track Record: Cryomagtech power supplies have been running in the field for years with excellent reliability, including continuous operation in university labs and zero-failure performance in critical applications. We can happily provide case studies and references from satisfied clients upon request.
- Quality & Compliance: All units are manufactured under ISO-certified processes and are designed to meet CE requirements and, where applicable, UL-referenced safety standards, with supporting documentation available upon request.
- Global Support & Service: Though based in Nanjing, China, we serve a global customer base. We offer prompt technical support in multiple languages, remote consultation, and on-site installation/training for complex systems. Our support philosophy is simple – your success is our success, so we’re here for you at every step, from pre-sale to after-sale.
- Continuous Innovation: At Cryomagtech, we invest in R&D to keep pushing the boundaries of what’s possible in magnetics. Our engineers work closely with research partners to develop new features (for example, our upcoming high-frequency bipolar supply for fast field modulation). When you choose us, you join a community that’s at the forefront of magnetic technology innovation.
7. Call to Action (CTA)
Are you ready to elevate your experiments with a state-of-the-art excitation power supply? Whether you need a few amps of ultra-stable current for a delicate measurement or hundreds of amps for a superconducting magnet, Cryomagtech has a solution tailored for you.
Don’t wait – take the next step toward hassle-free magnet control. Our experts are happy to discuss your specific needs and provide a fast, no-obligation quote or consultation.
Each inquiry receives personalized attention. We guarantee a prompt response and honest guidance, so you can make an informed decision. Join the growing number of leading labs that rely on Cryomagtech for dependable magnetic field control – and experience the difference in your own research!
8. Frequently Asked Questions (FAQ)
Q1: What is an “excitation power supply” and how is it different from a regular power supply?
A: An excitation power supply is a specialized constant-current power source designed to drive electromagnets or superconducting magnet coils. Unlike general-purpose DC supplies, it provides extremely stable current (even as the load inductance or resistance changes) and often allows bipolar output (both positive and negative current). It typically includes features like 4-quadrant operation (sourcing and sinking current), smooth zero-crossing, and magnet protection circuits. In short, it’s purpose-built to precisely control magnetic fields without the drift, noise, or overshoot that standard supplies might exhibit.
Q2: How do I choose between the High Precision series and the Superconducting Magnet series?
A: It depends on your current and application requirements. The High Precision Excitation Power Supply series (models P5–P120) is ideal for applications up to ~120 A and 0.5–15 kW – such as conventional electromagnets, Helmholtz coils, and smaller magnet setups. They excel in bench-top experiments and medium-sized magnetic systems, offering very fine control and an optional closed-loop field feedback mode. The Superconducting Magnet Power Supply (SP series) is designed for high-current, low-voltage output (120 A up to 1000 A) needed by large superconducting magnets and high-field systems. The SP series has specialized features like automatic constant-voltage/current switching and energy dump for quenches. If your project involves a superconducting magnet or requires hundreds of amps, go with the SP series; for lower current but ultra-high precision needs, the High Precision series is the better fit. Our team can also help advise on the best choice for your scenario.
Q3: Can these power supplies operate continuously? What about cooling requirements?
A: Yes, all Cryomagtech supplies are designed for 24/7 continuous operation under their rated conditions. Cooling requirements vary by model: our lower-current High Precision units use quiet air cooling, while the higher-power models (and all SP series supplies) come with either enhanced air cooling or water cooling to dissipate heat. For example, a 120A or larger unit will typically use water cooling (with a specified flow rate, e.g., 3 L/min) to maintain stable temperatures during long runs. Proper cooling ensures the output stability and longevity of the system. We provide clear guidelines for installation (e.g., radiator or chiller specifications for water-cooled models) and the supplies have built-in over-temperature protection as a safety net.
Q4: What safety features are included to protect my magnet and system?
A: Cryomagtech excitation power supplies include a full set of safety mechanisms designed for both electromagnets and superconducting magnet systems. Key protections include quench detection, which automatically cuts output and triggers an energy-dump circuit to safely dissipate stored energy during a quench. Overcurrent and overvoltage protection continuously monitor output and prevent damage by limiting or shutting down the supply when limits are exceeded. An interlock-controlled polarity reversal ensures safe switching for superconducting magnets. Over-temperature and power-loss protection safeguard internal components, allowing the supply to absorb inductive energy during shutdown. An integrated Emergency Stop button provides immediate manual cutoff. These features work together to protect your magnet and ensure safe, reliable operation.
Q5: Is remote control and automation possible?
A: Absolutely. Both series support remote operation. Each unit is equipped with communication interfaces – typically USB, LAN (Ethernet), and in some cases RS-232 or RS-485. We provide a simple PC control software for basic operation, and also offer a full command set/protocol so you can integrate the power supply into your own control systems or LabVIEW/Python programs. You can read current/voltage data in real time, set targets, configure ramp rates, and even log data remotely. This makes it easy to automate experiments or control the supply as part of a larger system. Many users, for example, run automated magnetic field scans by programming current sweeps via the LAN interface. Our support team can assist with API documentation and examples to get you started quickly.
Q6: What is the lead time and what kind of support can we expect after purchase?
A: For standard models, lead times are typically 4–6 weeks (we calibrate and burn-in each unit before shipment). Custom configurations may require slightly more time. We ship internationally with full insurance and handle export documentation for you. After purchase, you can count on ongoing support from Cryomagtech. We offer a 1-year standard warranty on all our excitation power supplies. During the warranty, any issues are resolved promptly – usually via remote troubleshooting or sending replacement parts/components. We also provide lifetime technical support: even beyond the warranty, you can contact us anytime for advice or service options. Our global support network means you’ll get a response within one business day (often much sooner). Additionally, we have detailed user manuals, application notes, and an online knowledge base to help you get the most out of your power supply. Your success and satisfaction are our ultimate goals.
(For any other questions, feel free to reach out – our team is ready to provide answers!)
9. Our Guarantee & Support
At Cryomagtech, we stand behind every product we make. Here’s our promise to you:
- Quality Guarantee: You will receive a rigorously tested, research-grade power supply that meets or exceeds the stated specifications. If anything does not perform as promised, we will make it right – whether through immediate troubleshooting, repair/replacement, or refund.
- 1-Year Warranty: All excitation power supplies come with a full 12-month warranty covering parts and labor. We also offer extended warranty and maintenance packages for long-term peace of mind.
- Fast Global Support: Need assistance or have a question? Our support engineers are just an email or call away. We guarantee a 24-hour response to support inquiries. For urgent cases, we’re available via phone/WhatsApp during business hours to resolve issues in real-time.
- Customer Satisfaction: Our goal is to build lasting relationships. From the first consultation to installation and beyond, we ensure you’re completely satisfied with your experience. Don’t hesitate to contact us for application guidance, technical tips, or even to share the success of your latest experiment – we love to hear how our products are enabling your breakthroughs!
Ready to power your next discovery? Get in touch with Cryomagtech today and let us help drive your research forward with confidence.