The article describes a new method of generating a rotating magnetic field of high frequency. This new measuring system is built of a magnetic circuit consisting of a ferrite torus, inside of which there are three L_P windings wound on ferrite cores connected in parallel with C_P capacitors. Between the three rectangular voltage signals shifted by 120 angular degrees and the L_PC_P circuits, three serial L_SC_S circuits that constitute the band-pass filter circuit are connected. In this way, the system can be powered by both sinusoidal and square signals. This significantly reduces the cost of the entire device. The necessary conditions for thermal energy release in a magnetic fluid placed in a high-frequency rotating magnetic field are given. The author presents the preliminary results of the calorimetric effect in a magnetic fluid caused by a rotating (RMF) and alternating (AMF) magnetic field. The same sample of the magnetic fluid with magnetite nanoparticles dispersed in the oil (as a carrier liquid) was studied by both methods. The heating rate temperature (dT/dt)_t=0 and its dependence on the intensity and the frequency of the magnetic field was determined. Taking into account the fact that both experiments were carried out under slightly different conditions, the intrinsic loss power (ILP) was calculated in order to compare the results. They indicate that the thermal effect in RMF is more than two times greater than in AMF. This allows a significant reduction in the mass of the magnetic material needed to produce a similar thermal effect in medical applications.

文章描述了一种产生高频旋转磁场的新方法。这种新的测量系统由一个由铁氧体环面组成的磁路构成，其中三个L _P绕组缠绕在与C _P电容器并联连接的铁氧体磁芯上。在偏移 120 度角的三个矩形电压信号和L _P C _P电路之间，三个串联L _S C _S连接构成带通滤波器电路的电路。这样，系统可以由正弦和方波信号供电。这显着降低了整个设备的成本。给出了置于高频旋转磁场中的磁性流体释放热能的必要条件。作者介绍了由旋转 ( RMF ) 和交变 ( AMF ) 磁场引起的磁性流体中量热效应的初步结果。通过两种方法研究了磁性流体的相同样品，其中磁铁矿纳米颗粒分散在油中（作为载液）。升温速率温度 ( dT/dt ) _t=0并确定了它对磁场强度和频率的依赖性。考虑到两个实验都是在略有不同的条件下进行的，计算了固有损耗功率 ( ILP ) 以比较结果。它们表明RMF中的热效应是AMF 中的两倍多。这允许显着减少在医疗应用中产生类似热效应所需的磁性材料的质量。