Читать книгу Analysis and Control of Electric Drives - Ned Mohan - Страница 22

Electric drives are increasingly being used in most sectors of the economy. Figure 1-7 shows that electric drives cover an extremely large range of power and speed – up to 100 MW in power and up to 80 000 rpm in speed.

Fig. 1-7 Power and speed range of electric drives.

Due to the power electronic converter, drives are not limited in speeds, unlike line‐fed motors that are generally limited to 3600 rpm or so with a 60‐Hz supply (3 000 rpm with a 50‐Hz supply).