Abstract
High temperature superconductors (HTS) enable very compact electric machines with high power density. Here, an HTS power generator based on authors’ previous double claw pole design is studied and improved. The original design of the double claw pole machine features a stationary field core to provide support and access to the superconducting field winding and its cryostat. It does not serve any other purpose. However, a homopolar field passes through it. The improvement was made to replace the field core by iron-cored copper coils, creating an inner stator within the generator to increase the electric loading. Through this step, the power output of the generator was increased from 10 to 11.6 MW, increasing the power density from 54.28 to 63.54 W/kg while maintaining the same outer diameter.
Highlights
Objectives and contextOne of the biggest challenges the wind energy sector faces is to reduce the cost of energy
The stationary field core in between the claw poles is replaced by copper coils, creating another stator within the generator
The double claw pole machine was introduced as a promising option for this objective
Summary
One of the biggest challenges the wind energy sector faces is to reduce the cost of energy. The tower head becomes extremely heavy for large wind turbines; this leads to a need for more robust foundation towers for support which in turn dramatically increase the cost of the whole system [2]. To solve this issue, a novel lighter topology of power generators based on superconductor technology is required which would enable 10 MW and even higher rated wind turbines. A novel lighter topology of power generators based on superconductor technology is required which would enable 10 MW and even higher rated wind turbines With this objective, the double claw pole machine was designed. These are oriented in an alternating fashion creating a North-South pole flux
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