Related Experiment Video
Updated: Mar 11, 2026

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
Published on: August 15, 2014
Electromagnetic interference reduction design of alternating integrator for EAST
1School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, People's Republic of China.
A new alternating integrator was developed for the Experimental Advanced Superconducting Tokamak to support long pulse operations. This device features excellent electromagnetic compatibility and low-drift properties, crucial for complex tokamak environments.
Area of Science:
- Fusion energy research
- Plasma physics engineering
- Advanced superconducting magnet technology
Background:
- Experimental Advanced Superconducting Tokamak requires long pulse operation up to 1000 seconds.
- Complex electromagnetic environments in tokamaks can degrade integrator performance.
Purpose of the Study:
- Design and implement an alternating integrator for long pulse operation.
- Ensure integrator performance despite a complex electromagnetic environment.
- Achieve excellent electromagnetic compatibility and low-drift properties.
Main Methods:
- Formulated specific reduced electromagnetic interference requirements.
- Designed integrator based on input signal processing, isolation properties, and circuit board layout/grounding.
- Actualized the new integrator system.
Main Results:
- The developed integrator demonstrates excellent electromagnetic compatibility.
- The integrator exhibits low-drift properties, suitable for sensitive tokamak operations.
- Successfully addressed challenges posed by the complex electromagnetic operating environment.
Conclusions:
- The new alternating integrator is suitable for long pulse operation in the Experimental Advanced Superconducting Tokamak.
- The design considerations effectively mitigated electromagnetic interference.
- The integrator's performance meets the demanding requirements of advanced fusion devices.
Related Concept Videos
Mesh Analysis for AC Circuits
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Eddy Currents
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
Equivalent Circuits for Practical Transformers
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
Superposition Theorem for AC Circuits
The principle of superposition stipulates that the output of a linear circuit with several concurrent inputs is equivalent to the...
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Design Example: Capacitance Multiplier Circuit
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

