Rotary permanent magnet electrodynamic suspension device and permanent magnet electrodynamic suspension method using the same

A rotary permanent magnet electrodynamic suspension device, comprising:

• a first drive system;
• a second drive system;
• a suspension system;
• an isolation layer;
• a speed control unit;
• a signal acquisition unit;
• a power supply unit;
• an inverter circuit unit;
• wherein the first drive system and the second drive system are symmetrically provided along an axial direction of the suspension system;
• the isolation layer is provided between the suspension system and each of the first drive system and the second drive system;
• the suspension system comprises a magnetic wheel, a non-magnetic conductor and a support;
• the non-magnetic conductor is configured to have electromagnetic induction with the magnetic wheel;
• the support and the magnetic wheel are both ring-shaped;
• the magnetic wheel is sleeved on an outer circumference of the support;
• the first drive system and the second drive system are configured to drive the magnetic wheel to rotate through electromagnetic induction;
• the suspension system is provided with a shaft and a bearing;
• the bearing is configured to support the support;
• the support has a rim structure, and is connected to the shaft through the bearing;
• the speed control unit is electrically connected to the inverter circuit unit, and is configured to transmit a pulse width modulation (PWM) signal to the inverter circuit unit;
• the power supply unit is connected to two ends of the inverter circuit unit to provide a power to the inverter circuit unit;
• the inverter circuit unit is electrically connected to the first drive system and the second drive system, and is configured to input a three-phase alternating-current (AC) excitation to the first drive system and the second drive system;
• the signal acquisition unit is configured to collect a rotational speed, a levitation force and a thrust force of the magnetic wheel, and the three-phase AC excitation, and feed the rotational speed, the levitation force and the thrust force of the magnetic wheel, and the three-phase AC excitation back to the speed control unit;
• the magnetic wheel is composed of a ring-shaped array of permanent magnets;
• and the permanent magnets are configured to form four pole pairs based on a radial magnetization pattern and a tangential magnetization pattern;
• each of the first drive system and the second drive system comprises a rotor component, a winding, a stator component, and an end cover;
• the rotor component, the winding, the stator component, and the end cover are sequentially arranged;
• the rotor component, the winding and the stator component are ring-shaped;
• the rotor component comprises a magnetically-conductive layer and an electrically-conductive layer;
• the magnetically-conductive layer is provided on a side of each of the first drive system and the second drive system near the isolation layer;
• and
• the isolation layer, the magnetically-conductive layer and the electrically-conductive layer are sleeved on the bearing, and are connected to the bearing;
• the winding, the stator component and the end cover are sleeved on the shaft, and are fixedly connected to the shaft.