robust design method for a textile-manufacturing-dedicated, high-efficient, energy-saving, multiphase asynchronous motor

摘要

A robust design method for a textile-manufacturing-dedicated, high-efficient, energy-saving, multiphase asynchronous motor, includes the following steps: designating a motor; designating design method; designating design variables of the high-efficient, energy-saving, multiphase asynchronous motor; building mathematical models of each index respectively to constitute a robust design model with multiple indexes; building the controllable factor level table; selecting appropriate orthogonal table according to the number of the optimizing variables and the level number of each variable; building an inner orthogonal table for inner design; building an outer orthogonal table for outer design; computing the values of the output characteristics and signal to noise ratio of the experimental schemes determined by the inner and outer orthogonal tables; determining the optimal combination of parameters; going through tolerance design; drawing the parts of the textile-manufacturing-dedicated, high-efficient, energy-saving, multiphase asynchronous motor according to the optimal design scheme, wire-cutting the mold, dieing, laminating, coiling, inserting windings, dipping paint and assembling. Combining the actual operating characteristics of textile-manufacturing-dedicated motor, a high-efficient, energy-saving, multiphase asynchronous motor with stable performance, reliable operation and low cost is achieved. The motor achieves the optimal balance between the quality and cost, and enhances the market competitiveness.

主权项

1. A robust design method for a textile-manufacturing-dedicated, high-efficient, energy-saving, multiphase asynchronous motor, wherein, the motor comprising the following steps:
(1) Designating a motor, especially an asynchronous motor as a robust design for the textile-dedicated machine; (2) Designating Taguchi method as the robust design method for a textile-manufacturing-dedicated motor; (3) Designating design variables for the high-efficient, energy-saving, multiphase asynchronous motor; taking all or partial variables of motor size, slot size, length of the air gap, conductors per slot and number of parallel branches as design variables for optimization, and selecting rated operating efficiency, rated power factor, smoothness of operating efficiency curve and production cost as the output characteristics; building mathematical models of each parameter respectively to constitute a robust design model with multiple indexes, wherein building the mathematical models of each parameter respectively is:f1=ηN=1-PLossN*f2=cosϕNf3=∑i=2nciηi-ηi-1ηif4=W1CMater.+W2CManuf.(Formula1) Where, f1 is the mathematical model of the rated operating efficiency of the high-efficient, energy-saving, multiphase asynchronous motor, which is a maximization problem; ηN is the rated operating efficiency of the high-efficient, energy-saving, multiphase asynchronous motor; PLossN* is the per-unit value of the total loss of the high-efficient, energy-saving, multiphase asynchronous motor, and the total loss includes iron loss, copper loss of stator windings, copper loss of rotor windings, aluminum loss of stator windings, friction loss and stray loss; f2 is the mathematical model of the rated power factor of the high-efficient, energy-saving, multiphase asynchronous motor, which is a maximization problem; φN is the rated power factor of the high-efficient, energy-saving, multiphase asynchronous motor; f3 is the mathematical model of the smoothness of operating efficiency curve of the high-efficient, energy-saving, multiphase asynchronous motor, which is a minimization problem; ηi and ci represent the operating efficiency and the corresponding weight of the high-efficient, energy-saving, multiphase asynchronous motor at different rotation speeds respectively; f4 is the mathematical model of the production cost of the high-efficient, energy-saving, multiphase asynchronous motor, which is a minimization problem; W1 and W2 represent the weighting coefficients of the effective material cost and the fabricating cost of the high-efficient, energy-saving, multiphase asynchronous motor respectively, and different cost strategies can be determined according to the specialized knowledge and practical experience; CMater. and CManuf. represent the effective material cost and the fabricating cost of the high-efficient, energy-saving, multiphase asynchronous motor respectively; the effective material cost consist of the cost of iron, copper, aluminum and insulating materials; the fabricating cost is the other cost except the effective material cost during the motor production; the proportional relation between effective material dosage and fabricating cost can be adjusted according to the actual situation; (4) Designating the level number and the corresponding values of the design variables for optimization, building the controllable factor level table, selecting an appropriate orthogonal table according to the number of the optimization variables and the level number of each variable, building an inner orthogonal table for inner design; (5) Taking the effect of the motor's production and processing level, assembly technology, working condition and environment, internal structure degradation and operation wear into consideration, the parameter errors resulting from the above factors are taken as the noise factors; designating the level number of each noise factor and the corresponding value of each level, building the noise factor level table; selecting an appropriate orthogonal table according to the number of the noise factors and the level number of each factor, and building an outer orthogonal table for outer design; (6) Treating each output characteristic as “the small the better” characteristic respectively, to correspond to each combination of the inner orthogonal table, and computing the output characteristic value and signal to noise ratio of the experimental scheme determined by the inner and outer orthogonal tables; (7) Carrying out variance analysis for the results, and testing the significance levels of design parameters to determine the optimal combination of parameters; (8) Taking the optimal combination of parameters achieved from step (7) as the value of each parameter for optimization, further, determining fluctuation range of each parameter for tolerance design; (9) Drawing the parts of the textile-manufacturing-dedicated, high-efficient, energy-saving, multiphase asynchronous motor according to the optimal design scheme, wire-cutting the mold, dieing, laminating, coiling, inserting winding, dipping paint and assembling; testing the actual operation indexes of the motor and comparing them with the indexes given by the design scheme; if the indexes given by the design scheme exceed the required range of the operation indexes, then the performance design scheme is modified and the optimizing design is carried out again, otherwise, the design scheme is confirmed and batch manufacturing is carried out.