19" rack power supply DXNT120-8-5Q

AC/DCregulatedconstant-current

Overview

The DXNT series Superconducting Magnet Power Supply by Dexinmag is an all-digital, high-stability bipolar current source engineered for superconducting magnets. It combines a switching pre-regulation stage with a linear regulation latter stage to achieve high efficiency and very low ripple. The series is modular and covers current ranges from 100 A to 1000 A across multiple models.

Key features

• Automatic constant-current and constant-voltage control switching, optimized for magnets with large inductance.
• Output polarity detection and bipolar positive/negative current output when reversing switch is connected; negative current settable by user.
• Segmented charging/discharging ramp and per-interval constant-current voltage settings for flexible current profiles.
• Four-quadrant output supporting positive/negative currents and voltages to enable controlled charging and discharging of the magnet.
• Automatic magnet quench detection with external quench input capability.
• Integrated quench discharge control: compatible discharge resistor can be automatically connected to dump energy on quench.
• Local control via 7-inch high-resolution LCD touchscreen with menu interface.
• Remote control via USB (Type B) and LAN (RJ45); RS-485 supported for parallel control of multiple supplies.
• Parallel operation to expand total current; each unit addressable via bus.
• Comprehensive protections monitoring mains, cooling and system state; on-screen fault display and emergency stop with automatic energy discharge connection.

Technical Parameters (summary from table)

• Available DXNT models: DXNT 120-8-5Q, 240-8-5Q, 360-8-5Q, 500-8-5Q, 1000-8-5Q.
• Input: Single-phase (220±10% VAC) for smaller models; three-phase five-wire (380±10% VAC) for larger models.
• Input Power (by model): 1500 VA (120), 3000 VA (240), 4500 VA (360), 7500 VA (500), 15000 VA (1000).
• Output type: Bipolar constant current, four-quadrant.
• Way of output: Digitally set linear adjustment control.
• Current range (by model): ±120 A (120), ±240 A (240), ±360 A (360), ±500 A (500), ±1000 A (1000).
• Output voltage: +8 / -5 V across models.
• Load inductive reactance: 0–100 H.
• Stability: ±15 ppm/h (after 30 min warm-up).
• Ripple (RMS): 2 mA (120), 4 mA (240), 6 mA (360), 8 mA (500), 15 mA (1000).
• Output setting resolution: 20 bit.
• Output accuracy (by model): 0.02% ± 3 mA (120), 0.02% ± 5 mA (240), 0.02% ± 8 mA (360), 0.01% ± 5 mA (500), 0.01% ± 10 mA (1000).
• Rate of change (ramp): 0.0007–120 A/s (120), 0.0014–240 A/s (240), 0.0021–360 A/s (360), 0.003–500 A/s (500), 0.006–1000 A/s (1000).
• Clamp voltage setting resolution: 0.1 V; clamp voltage accuracy: 0.5 ± 0.1 V.
• Display – current resolution: 24 bit; current accuracy (display): model-dependent (from 0.05%±5 mA to 0.02%±10 mA).
• Voltage resolution (display): 24 bit; voltage accuracy: 0.2% ± 100 mV.
• Update / read-write rates: Display update 1 time/s; computer read/write 5 times/s.
• Computer interface: USB (Type B) and LAN (RJ45); RS-485 for parallel control.
• Superconducting heating switch (option): Current 10–1200 mA (12-bit DAC), voltage 3–20 V, current accuracy 2% ± 3 mA, interface via aviation self-locking plug XS16J4A.
• Working temperature: 0–40 °C.
• Cooling: Forced air cooling (fan speed regulated by power); optional water cooling (3 L/min).
• Electrical connection: Input power cords by model (10 A, 16 A, 25 A, >4 mm², >10 mm²); recommended output conductor diameters increasing with model (>25 mm² up to >300 mm²).
• Size (W×H×D) examples: 482.6 × 177 × 530 mm; 482.6 × 444.5 × 53 mm; 482.6 × 666 × 530 mm; 482.6 × 533 × 530 mm; 482.6 × 1066 × 530 mm.
• Weight (by model): approx. 30 kg (smallest) up to 300 kg (largest).

Technical specifications

• Brand: Dexinmag
• Main model presented: DXNT120-8-5Q
• Series: DXNT (120-8-5Q, 240-8-5Q, 360-8-5Q, 500-8-5Q, 1000-8-5Q)
• Output: Bipolar constant current, four-quadrant; digitally set linear adjustment.
• Nominal output voltage range: +8 / -5 V; load inductance up to 100 H.
• Interfaces: USB (Type B), LAN (RJ45), RS-485 for parallel control.
• Control/display: 7-inch LCD touchscreen; 20-bit output setting, 24-bit display resolution.
• Protection & quench handling: magnet quench detection, automatic discharge circuit with matched resistance, emergency stop.
• Cooling: forced air with optional water cooling (3 L/min).