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This paper presents design studies of an integrated electrical drive employing a wound field flux switching motor (WFFSM) coupled with a Z-source inverter (ZSI). The WFFSM has field excitation coils as dc field mmf sources locate at the stator body. On the other hand, the ZSI works as a three-phase inverter with voltage boost function by adding a switching device and an impedance-network. The impedance-network...
This paper presents experimental evaluations of drive performances in high-speed range of a wound field synchronous motor (WFSM) drive system integrated with a z-source inverter (ZSI). The WFSM has two field coils as DC field mmf sources instead of permanent magnets. On the other hand, the ZSI employs an impedance-network that consists of two DC reactors and two capacitors. A uniqueness of the proposed...
This paper reports design refinements to make a trial manufacturing of hybrid excitation motor (HEM) for high speed spindle drive in machine tools. The proposed HEM is intentionally designed using 3D-FEA for the target application taking into account of practical design constraints. In accordance with the redesigned specifications, a test machine with 4-pole HEM is manufactured and tested. Some experimental...
This paper presents an investigation into design possibility of hybrid excitation motor as less-permanent magnet and high power density for traction drives in Hybrid Electric Vehicles. Firstly, the construction, the basic working principle and the design concept are overviewed. Then, the reason why the proposed machine is suitable for realizing the motor with less-permanent magnet and high power density...
This paper presents a hybrid excitation motor for a main spindle drive in end- and face-milling tools which is operated with high speed 50,000 min-1. The proposed motor has not only a permanent magnet but also the field coil which makes field weakening and strengthening control possible with taking no notice of the magnet demagnetization. In addition, the sum of iron and copper losses of the motor...
This paper presents a design approach of a direct-drive permanent-magnet (PM) motor for a medium-sized injection-molding application. In the proposed approach, genetic-algorithm (GA) loop works to optimize the lamination design in order to meet the requirements for the target application. To achieve the design optimization within a realistic time scale, the repeated calculation required to obtain...
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