Design Optimization for Unified Field Permanent Magnet Dual Mechanical Ports Machine

The unified field permanent magnet dual mechanical port electrical machine (UFDMPM) is a kind of multiple inputs and outputs electromechanical energy transducer with two electrical ports and two mechanical ports, which is an ideal transmission system for Hybrid Vehicles and has advantages such as high integration, high efficiency and compactness. In this paper, a design optimization method is presented, combining magnetic circuit calculation and magnetic field calculation. Magnetic circuit calculation was firstly done to accomplish the optimized design of air gap, windings, groove shape, magnets and other key components of inner machine and outer machine to meet the basic performance requirements. Magnetic field simulation was realized to get the precise parameters of the machine and validate performance requirements. Then different load simulations were carried out, showing that the design can make the machine meet technical specifications.