文件名称:Principles-of-Electrical-Machines--[V.K.-Mehta].r
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Although a far greater percentage of the electrical machines in service are a.c.
machines, the d.c. machines are of considerable industrial importance. The
principal advantage of the d.c. machine, particularly the d.c. motor, is that it
provides a fine control of speed. Such an advantage is not claimed by any a.c.
motor. However, d.c. generators are not as common as they used to be, because
direct current, when required, is mainly obtained an a.c. supply by the use
of rectifiers-Although a far greater percentage of the electrical machines in service are a.c.
machines, the d.c. machines are of considerable industrial importance. The
principal advantage of the d.c. machine, particularly the d.c. motor, is that it
provides a fine control of speed. Such an advantage is not claimed by any a.c.
motor. However, d.c. generators are not as common as they used to be, because
direct current, when required, is mainly obtained an a.c. supply by the use
of rectifiers
machines, the d.c. machines are of considerable industrial importance. The
principal advantage of the d.c. machine, particularly the d.c. motor, is that it
provides a fine control of speed. Such an advantage is not claimed by any a.c.
motor. However, d.c. generators are not as common as they used to be, because
direct current, when required, is mainly obtained an a.c. supply by the use
of rectifiers-Although a far greater percentage of the electrical machines in service are a.c.
machines, the d.c. machines are of considerable industrial importance. The
principal advantage of the d.c. machine, particularly the d.c. motor, is that it
provides a fine control of speed. Such an advantage is not claimed by any a.c.
motor. However, d.c. generators are not as common as they used to be, because
direct current, when required, is mainly obtained an a.c. supply by the use
of rectifiers
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Principles of Electrical Machines- [V.K. Mehta].pdf