Bearingless switched reluctance motor error-tolerant operation control method
A switched reluctance motor and operation control technology, applied in AC motor control, electronic commutation motor control, control system, etc., can solve problems such as system paralysis, motor and control system damage, and inability to achieve stable suspension
Inactive Publication Date: 2009-02-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
When a phase of the motor fails, the bearingless switched reluctance motor will not be able to achieve stable suspension, resulting in system paralysis, and in severe cases, damage to the motor and control system
These problems limit the promotion and application of bearingless switched reluctance motors, making them less competitive in modern speed control research and industrial applications.
Method used
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[0012] 1. If figure 2 As shown, in interval I, phase B is in the inductance rising zone, and at this time, phase B is turned on to generate positive torque, and at the same time, the suspension winding of phase B is turned on to generate a control magnetic field superimposed with the bias magnetic field generated by the main winding to generate a suspension of the rotating shaft The required radial levitation force; in the interval II, the inductance of phase A is in the rising zone, so the phase A is turned on to generate positive torque, and similarly, the levitation force is also provided by the phase A; in interval III, in order to realize that the motor can drive The fault continues to rotate and levitate, and phase A continues to conduct, compensating for the levitation force originally provided by phase C.
[0013] 2. When the phase is missing, under the premise of ensuring the stable suspension of the motor, the negative torque generated by the compensation phase shou...
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When electric current detection procedure has detected that fault occurred on the on state phase, the control method switches to fault tolerant operation control mode immediately. Using previous phase of the fault phase, i.e. compensation phase prolongs on state time till to compensate suspension force needed for stable suspension of motor in lack of phase. Next phase of fault phase is in normal on state. At this point, suspension force in two degrees of freedom is allotted by two phases except the fault phase so as to calculate current of suspension winding in order to obtain suspension force in each direction. In positive torque region of suspension phase, current value of main winding is obtained by adjusting rotation speed PI; in negative torque region, the method calculates needed current values to ensure that motor runs stably under fault state continuously. The invention prolongs service life of motor, and gives full play to superiority of high fault tolerant capability.
Description
1. Technical field [0001] The invention relates to a control method for fault-tolerant operation of a bearingless switched reluctance motor, which belongs to a control method for a bearingless switched reluctance motor. 2. Background technology [0002] Bearingless switched reluctance motor is a kind of magnetic levitation motor, so it has all the advantages of magnetic levitation motor, such as: no contact, no wear, high speed, long life, etc. At the same time, this motor does not require additional magnetic bearings, and the axial length is very short, so this motor also has the advantages of high axial utilization, high integration, and easy realization of ultra-high speed. In addition, the bearingless switched reluctance motor has the advantages of the switched reluctance motor, such as: simple structure, high reliability, good speed regulation performance, and low cost. [0003] With the development of modern industrial automation, the ability of the system to operate ...
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IPC IPC(8): H02P6/00H02N15/00H02P25/08
Inventor 曹鑫邓智泉王晓琳罗建震杨钢
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS