Design and Optimization of Permanent Magnetic Field for Magnetic Refrigeration

As a kind of green technology,the room-temperature magnetic refrigeration have huge potential.The efficiency of refrigeration mostly depends on the strength and uniformity of magnetic fields.So the computation of field and design of magneric circuit are essential to the magnetic refrigerator at room temperature.The magnetic circuit theorem and finite element method are briefly described in the paper.The magnetic flux density of working gap is simulated and optimized by using APDL technology of Ansys.The result reveals that the weight of magnet is reduced by 50%,greatly reducing the manufacturing cost.The stress produced in manufacturing and planeness of magnetic pole have markedly influence on the distribution of magnetic field.