Magnetic moment is a physical quantity that describes the magnetic properties of current coils and the physical properties of microscopic particles.
The concept of magnetic torque:
Magnetic moment is a reaction in physics, is the torque generated by the ampere force Magnetic moment is a vector, its direction is consistent with the normal direction of the coil, indicating the unit vector along the normal direction, the normal and the current flow into the right spiral system, the coil is subjected to the magnetic field torque (called magnetic moment) to make the test coil turn to a certain position and stable balance. At this time, the magnetic moment received by the coil is zero, and the direction indicated by the positive normal of the coil is defined as the magnetic field direction where the coil is located. If the test coil is turned, as long as the coil slightly deviates from the equilibrium position, the magnetic torque subjected to the coil is not zero.
When the test coil is turned from the equilibrium position, the magnetic torque on the coil is maximum. At a given point in the magnetic field, the ratio is only related to the position of the test coil, that is, only to the properties of the magnetic field where the test coil is located.
How the magnetic moment is measured:
The magnetic moment measuring system by magnetic flux method is a kind of magnetic measuring system which can obtain the magnetic moment and core position of the measured object by measuring the magnetic flux produced by the measured object passing through multiple coils at uniform speed. Magnetic flux method A method to determine and verify the basic magnetic parameters of an instrument by inverting its magnetic moment with the corresponding magnetic flux of the measuring instrument. The magnetic moment measurement system of magnetic flux method has practical significance in the selection of raw materials and components for satellite development, the research of solar array wire layout, the ground simulation test setting of space instruments and equipment, and the flight control of spacecraft.