A Simulation Analysis Method of No-load Current Consistency of Permanent Magnet Synchronous Motor

Abstract

The invention discloses a simulation analysis method for no-load current consistency of a permanent magnet synchronous motor, which belongs to the technical field of performance and consistency analysis of a permanent magnet synchronous motor. The steps are: establish the no-load current of the permanent magnet synchronous motor and the n underlying structure parameters p that affect the no-load current i The set P={p 1 ,p 2 ,...,p n}, where, i∈1,...,n, n<∞; build a permanent magnet synchronous motor with an additional control circuit to form a control system model; through the simulation of the finite element model, obtain the permanent magnet synchronous The three-phase self-inductance and mutual inductance of the motor are calculated to obtain the inductance value of the DQ axis; construct a model that reflects the no-load current of the permanent magnet synchronous motor and the set of n underlying structural parameters P and m material properties, where n<∞, m≤n; obtain the mapping relationship between the motor size and the no-load current of the motor, so as to establish the Kriging approximate model; calculate the effective value of the no-load current of the batch motor according to the approximate model, and then carry out the consistent no-load current of the permanent magnet synchronous motor gender analysis. The invention solves the problem that the modeling method of the permanent magnet synchronous motor cannot consider the influence of parameter dispersion on the no-load current.

Description

technical field [0001] The invention relates to a simulation analysis method for no-load current consistency of a permanent magnet synchronous motor, belonging to the technical field of performance and consistency analysis of a permanent magnet synchronous motor. Background technique [0002] The consistency of permanent magnet synchronous motor is jointly determined by design, manufacture and management. For permanent magnet synchronous motors, due to the constraints of the manufacturing process level, the parameter dispersion brought about by its design and manufacturing process makes it inevitable that there is a certain degree of difference between the individual batches of permanent magnet synchronous motors. This difference will directly affect the performance consistency of the permanent magnet synchronous motor. [0003] In the current research, it is generally believed that the difference between the output characteristics of batch permanent magnet synchronous moto...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for simulation analysis of the no-load current consistency of permanent magnet synchronous motors, to solve the current related research on the consistency simulation analysis of permanent magnet synchronous motors, the influence of the manufacturing process on product consistency has not been considered, and The problem of being unable to control the output characteristic error caused by the starting position of electromechanical products, and the problem of long running time of no-load current simulation and the difficulty of obtaining batch simulation models

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