Research On A New Type Of Bearingless Switched Reluctance Motor For Energy Storage And Its Power Generation Control Strategy

With the development of distributed power generation,new energy vehicles and new energy power generation,energy storage technology has been widely studied by many scholars around the world.There are many types of energy storage technologies,and flywheel energy storage is so hot because of its advantages.Bearingless Switched Reluctance Motor(BSRM)has many advantages.BSRM has unique advantages in the field of flywheel energy storage,which opens up a new way for the development of flywheel energy storage towards integration and high reliability.This thesis first summarizes the research status of BSRM at home and abroad,and summarizes the main research contents,then,discusses the problems that BSRM has not fully solved at present project,in view of the shortcomings of traditional BSRM with nonlinearity and strong coupling,a 12/10-pole BSRM structure was studied.This motor adopts a wide-narrow-pole hybrid stator tooth structure that divides the stator into floating poles and torque poles,the torque pole winding and the suspension pole winding on the motor stator are independently controlled by power supply.Among them,the use of permanent magnets can provide a bias magnetic flux for the motor torque,reduce the ampere-turns of the windings,and also improve the operation efficiency.Moreover,this thesis also carefully analyzes the structure and working principle of BSRM 12/10 pole,and deduces the mathematical model of its suspension strength.On this basis,the basic calculation formula for engine volume was carefully studied.And the influence of various structural parameters which is on engine performance is analyzed,the structural parameters of the engine are optimized.To analyze and study the magnetic density,torque,suspension and coupling characteristics of the 12/10-pole BSRM,this thesis use finite element simulation software,and make a comparative analysis with the 12/14-pole BSRM,and get the motor In the design of the structure,The independent operation of suspension force and torque is basically realized.What is more,the basic characteristics of Soft Magnetic Composites(SMC)are introduced in detail,and they are applied to the 12/10-pole BSRM structure,and compared with the BSRM of the commonly used silicon steel sheet material in terms of loss characteristics,electromagnetic characteristics,etc.The comparative analysis summarizes the unique advantages and disadvantages of SMC applied to BSRM.Finally,the power generation operation control strategy of this 12/10-pole BSRM is actively explored,and a generator voltage output control method which is based on turn-on and turn-off angle optimization is proposed,and it is to realize the output voltage regulation of the generator.Due to the independence of 12/10-pole BSRM in torque control and suspension control,its power generation operation control is basically similar to that of conventional SRM.Because this prototype is still debugging the relevant control parameters,SRM conducts relevant power generation experiments to verify the effectiveness of the power generation control strategy.And discussed the future development trend of BSRM in power generation operation.