Variable-characteristic d.c. machines

Variable-characteristic d.c. machines

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Proceedings of the Institution of Electrical Engineers — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The paper deals with the application of pulsed voltage waveforms to the field windings of separately excited d.c. machines, and describes the development of an unusual form of control scheme, which holds the field current and the armature current in a fixed relationship. A wide range of torque/speed characteristics are shown to be possible, using simple and inexpensive control apparatus. One arrangement, which allows the separately excited machine to behave as a series machine in the motoring region, and as a constant-torque machine in the braking region, is described in detail, and its possible application as a battery electric traction drive is discussed.

Inspec keywords: torque; DC machines

Subjects: d.c. machines


    1. 1)
      • M.G. Say , H.G. Frampton . The compound characteristic in regenerative braking with d.c. traction. J. IEE
    2. 2)
      • L.G. Riley , G.H. Woods . Dynamic braking with traction motors. Trans. Amer. Inst. Elect. Engrs.
    3. 3)
      • B.S. Hender . Recent developments in battery electric vehicles. Proc. IEE , 12
    4. 4)
      • R. Wells . (1962) , Static power convertors.
    5. 5)
      • A.E. Clayton . (1959) , Performance and design of direct current machines.
    6. 6)
      • A. Grasseli , R. Stefanelli . New analogue multiplier/divider. Electronics Letters
    7. 7)
      • M.O. Deighton , A.E. Sayle , C.S. Kestin . Analogue pulse arithmetic using logarithmic p-n junctions. Proc. IEE , 2

Related content

This is a required field
Please enter a valid email address