Abstract
This paper with an open-loop V/f control mode of inverter supply, searched for the causes of the oscillation using small signal analysison the axially-laminated anisotropic (ALA) rotor and hybrid rotor (ALA-SPM two-part) motor, and analyzed operating performance of themotors with inertial damper on the same shaft. Results show that the negative electromagnet damping coefficient can be the key point toresult in the oscillation; the electromagnet damping coefficient can increase with the increasing new variable k, the fraction length of SPMpart, the maximum load of the motors and the stability can be improved. The stability of the system and the dynamic performance can bebetter with reasonable viscous damping coefficient of inertial damper, the motors can adequately develop their output torque capability,and improve operating performance. Ill. 11, bibl. 11, tabl. 3 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.113.7.603
Highlights
The high-density axially-laminated anisotropic (ALA) rotor with axial laminations interleaved with insulation spacer is capable of yielding a comparatively higher saliency ratio
This paper describes the causes of the oscillation on four-pole hybrid rotor motor and ALA rotor motor with the open loop V/f control by using small signal model
Experiments of the open-loop startup performance on the two-pole ALA rotor motor and hybrid rotor motor under no–load conditions are implemented by a VVVF inverter (Pasasonic MIX374BS) supply, and the inverter has start/stop and acceleration/deceleration functions
Summary
The high-density axially-laminated anisotropic (ALA) rotor with axial laminations interleaved with insulation spacer is capable of yielding a comparatively higher saliency ratio. This paper describes the causes of the oscillation on four-pole hybrid rotor motor and ALA rotor motor with the open loop V/f control by using small signal model. This paper presents the relationship between the viscous damping coefficient Tdd , inertial Jd of the mechanical damper and the operating performance of the different rotor motor under load. The simplified small signal dynamic model with inertial damper on rotor shaft can be obtained from a simplified linearized model of the hybrid rotor motor. The parameter ke is the electromechanical spring constant, which is equal to the slope of the load-angle torque curve of the motor at the steady state operating point [9], i.e. The transfer function can be obtained from Fig. 5, and the expression is given by. From above (16)~(18) and (21)~(23), small signal linearized state equations with mechanical inertial damper are derived as iidq rd p2
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