The frameless alternators of the ATK family have been designed for wind energy applications in direct drive technology without gearbox in the power range of 200W up to 100kW.
Six sizes with an OD of 145 to 795mm and an ID of 56 to 630mm and up to 9 stack length in each size are available. The OD of the stators is used for the model number: 145ATK, 190ATK, 300ATK, 400ATK, 500ATK, 800ATK.
For each model there are two standard windings for different speed characteristics. The typical speed ranges from 80 to 1500rpm depending on size. The windings are designed for a phase to phase voltage of 230Vac (133Vac single phase) at nominal speed and power. For the version with the higher speed the power is higher and therefore at the same voltage the current must be higher as well.
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