Electromagnet Overview
Our self-developed electromagnets allow adjustment of magnetic field strength and uniformity by changing pole pieces, and the field strength can be varied by adjusting the pole gap. These electromagnets are fully compatible with customer-designed magnetic field platforms. They are primarily used for hysteresis studies, magnetic susceptibility measurements, Hall effect studies, magneto-optical experiments, magnetic annealing, nuclear magnetic resonance, electron paramagnetic resonance, biological research, magnetic measurements, magnetic material orientation, and magnetization of magnetic products.
- U-shaped structure, wide field of view, high magnetic field strength, easy adjustment of field strength
- Compact size, lightweight, small duty cycle, compact structure, superior magnetic performance
- Smooth and flexible adjustment of working air gap; threaded pole pieces for easy replacement
- Optional working gap scale indication
- At small gaps, suitable for magnetizing ferrite products and magnetic products. When paired with our self-developed high-precision bipolar constant current power supply (10ppm), it forms a multifunctional laboratory magnetic field generation system. This system enables fast and uniform magnetic field scanning and field reversal through true bipolar constant current output, avoiding magnetic field discontinuities during zero-crossing reversal, achieving true zero magnetic field.
Gaussmeter Introduction
The built-in gaussmeter is a dedicated instrument developed by our company for measuring magnetic field strength based on the Hall effect. When used with our electromagnet power supply, it provides feedback for precise measurement, rapid adjustment, and stable control of the magnetic field. Users simply set the desired field, and the power supply automatically adjusts the electromagnet to the target value, greatly enhancing user convenience.
The built-in gaussmeter with a Hall probe can also be used independently to measure DC magnetic fields from 0 to 3T with full-scale display, no range switching, simple operation, and intuitive readout.
- No range switching; full-scale display of measured field, avoiding measurement interruptions during dynamic adjustment
- Automatic measurement speed adjustment ensures both dynamic response and steady-state accuracy
- High resolution: 0.01 Gs (1 uT), 6¾-digit display
- Hall probe with temperature compensation for accurate field measurement at different temperatures
- Ultra-low measurement noise
- RS-232 communication interface for remote real-time field data reading via computer
- Compact size, lightweight, easy operation
High-Stability Bipolar Constant Current Magnet Power Supply Overview
Our magnet power supply is a fully digital, high-precision, high-stability constant current source with bipolar output, widely used for energizing inductive loads such as electromagnets and Helmholtz coils. It enables continuous current zero-crossing with contactless reversal, producing smooth and stable controlled magnetic fields.
The main circuit uses linear amplification mode, ensuring high output current stability and thus high magnetic field stability. The power supply features multiple protections including overcurrent, overtemperature, and undervoltage. It offers two control modes: local control via touchscreen for power on/off and current setting, and remote control via RS-232 (optional 485, Ethernet) interface connected to a computer for software operation.
The overall design principle of the magnet power supply is shown in the block diagram above. The main circuit adopts a structure of front-stage switching power supply pre-regulation followed by linear current stabilization, combining the efficiency of switching power supplies with the low ripple and high stability of linear power supplies.
The control board mainly includes MCU, reference voltage, DAC, ADC, and error comparator amplifier. The DAC-set current and current sampling form a negative feedback circuit via the error comparator, and the error signal drives the linear adjustment section to achieve the set output current, forming a closed-loop control for high current stability.
Current sampling uses either a high-stability resistor (1ppm/°C) or a high-stability DCCT (1ppm/°C) combined with a high-stability resistor (1ppm/°C). The choice depends on specific power supply parameters. The DCCT is from HITEC with a temperature coefficient of 1ppm/°C; as a current-type sensor, it is paired with a high-stability resistor to convert to a stable voltage signal.
The human-machine interface includes a touchscreen and communication interfaces. The power supply has four control modes: local control via touchscreen for power on/off and current setting, and remote control via RS-232, 485, or Ethernet interface connected to a computer for software operation.
Probe Adjustment Product Information
- Main body made of stainless steel with fine grinding, high rigidity, corrosion resistance
- Displacement part uses imported cross roller guide rails for ultra-high precision
- Overall drive uses precision micrometer for quantitative reading and precise control
- Overall linear displacement for ultra-high stability
- Compatible with multifunctional adjustable probe holders, knob adjustment for easy probe adjustment
- Bottom ultra-strong adjustable magnetic base with knob to control magnetic force, magnetic adsorption 5kg, ensuring system stability; can be combined with high-frequency probe holders for RF series
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