US 12,214,671 B2
Rotary permanent magnet electrodynamic suspension device and permanent magnet electrodynamic suspension method using the same
Zigang Deng, Chengdu (CN); Zhentao Ding, Chengdu (CN); Maoru Chi, Chengdu (CN); Mingming Li, Chengdu (CN); Sanchun Nie, Chengdu (CN); Yadong Ma, Chengdu (CN); and Kaiwen Li, Chengdu (CN)
Assigned to SOUTHWEST JIAOTONG UNIVERSITY, Chengdu (CN)
Filed by SOUTHWEST JIAOTONG UNIVERSITY, Chengdu (CN)
Filed on Jul. 10, 2024, as Appl. No. 18/768,201.
Application 18/768,201 is a continuation of application No. PCT/CN2024/087295, filed on Apr. 11, 2024.
Claims priority of application No. 202310678079.2 (CN), filed on Jun. 9, 2023.
Prior Publication US 2024/0359566 A1, Oct. 31, 2024
Int. Cl. H02P 21/00 (2016.01); B60L 13/04 (2006.01); B60L 13/10 (2006.01); H02K 7/08 (2006.01); H02K 21/24 (2006.01); H02P 21/14 (2016.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01); H02P 27/12 (2006.01)
CPC B60L 13/10 (2013.01) [B60L 13/04 (2013.01); H02K 7/083 (2013.01); H02K 21/24 (2013.01); H02P 21/141 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02); H02P 27/12 (2013.01); H02P 2207/05 (2013.01)] 5 Claims
OG exemplary drawing
 
1. 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.