Conclusions
The bridge circuit shown in Fig. lb is preferable for the reason that it introduces a lower temperature error and makes it possible by means of a passive RC section to reduce dynamic errors due to the inertia of the motor armature.
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Literature cited
E. D. Lebedev et al., Control of dc Motors [in Russian], Énergiya, Moscow (1970).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 2, pp. 71–73, February, 1978.
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Rudakov, V.V., Mamedov, V.M. Improving accuracy of bridge circuits for measuring emf of dc motors. Meas Tech 21, 265–268 (1978). https://doi.org/10.1007/BF00821166
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DOI: https://doi.org/10.1007/BF00821166