Slotless skew winding axial active suspension bearingless motor and control method

A bearingless motor and winding technology, used in motor generator control, electronic commutation motor control, control system, etc., can solve problems such as permanent magnet demagnetization, achieve small torque fluctuation, low loss, and reduce magnetic density saturation. Effect

Active Publication Date: 2015-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

But the disadvantage of this method is that the d-axis current i d Con...

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  • Slotless skew winding axial active suspension bearingless motor and control method
  • Slotless skew winding axial active suspension bearingless motor and control method
  • Slotless skew winding axial active suspension bearingless motor and control method

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] In this embodiment, the permanent magnet is NdFeB, the axial displacement sensor 7 adopts an eddy current sensor, the rotor position sensor 9 adopts a Hall sensor, and the controller is realized by a digital signal processor (DSP), which includes a PD controller and a PI Taking the controller as an example, a three-phase motor whose upper layer winding is axially biased to the right and the lower layer winding is axially biased to the left is used as an example to describe the technical solution of the present invention in detail:

[0030] Such as figure 1 , 2 As shown in and 3, the axial active suspension bearingless motor with slotless oblique windings of the present invention includes a radial casing 1, a permanent magnet rotor 2, an upper stator 3, a lower stator 4, a non-magnetic rotating shaft 5, and a first three-phase inverter Inverter (Inver...

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Abstract

The invention discloses a slotless skew winding axial active suspension bearingless motor, and belongs to the field of motor manufacture. The slotless skew winding axial active suspension bearingless motor comprises a shell, a rotor, an upper stator, a lower stator, a non-magnetic rotating shaft, a rotor position sensor and an axial displacement sensor, radial driven magnetic bearings are mounted at two ends of the non-magnetic rotating shaft respectively, the upper stator and the lower stator respectively comprise a slotless stator yoke and an axial skew annular winding, skew direction angles of the windings of the upper stator and the lower stator are axially symmetric about the motor, three-phase inverters are connected onto the windings of the upper stator and the lower stator respectively and connected with a controller, and the rotor position sensor and the axial displacement sensor are connected with the controller. The stators are of slotless structures, motor slot effects are eliminated, axial suspension and rotation of the rotor are controlled in a decoupled manner by adjusting given current of the windings of the upper stator and the lower stator, and the problem of permanent magnet demagnetization caused by controlling axial suspension through axial current. The invention further discloses a control method of the slotless skew winding axial active suspension bearingless motor.

Description

technical field [0001] The invention relates to a motor, in particular to a slotless oblique winding axially active suspension bearingless motor and a control method, which belong to the field of motor manufacturing. Background technique [0002] Bearingless motors have the characteristics of no wear, no lubrication, and no pollution, and have been widely used in medical, biochemical, semiconductor manufacturing and other fields. In a bearingless motor, five degrees of freedom in two radial directions, two torsional directions, and one axial direction of the rotor need to ensure stable magnetic levitation, and the number of active control degrees of freedom determines the number of inverters required. For example, a traditional 4-DOF actively controlled bearingless motor consists of a cylindrical rotor and two bearingless motor components connected in series, in which the 4 DOFs in the radial and torsional directions are actively controlled, while the axial direction is pass...

Claims

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Application Information

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IPC IPC(8): H02K16/00H02P21/00
CPCH02K1/12H02K3/04H02K16/00
Inventor 丁强王晓琳武谷雨倪拓成邓智泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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