xvi CONTENTS
PA OK
132. Numerical instance—Inductive load—Discussion and com-
parisons with monocyclic square.............223
133. Series connection of induction phase converter in single-phase
induction motor railway—Discussion of its regulation .... 220
134. Synchronous phase converter and single-phase generation—
Control of the unbalancing of voltage due to single-phase load,
by stationary induction phase balancing with reverse rotation
of its polyphase system—Synchronous phase balancer. . . . 227
135. Limitation of single-phase generator by heating of armature
coils—By double frequency pulsation of armature reaction—
Use of squirrel cage winding in field—Its size—Its effect on the
momentary short circuit current.............229
136. Limitation of the phase converter in distributing single-phase
load into a balanced polyphase system—Solution of the
problem by the addition of a synchronous phase balancer to the
synchronous phase converter—Its construction.......230
137. The various methods of taking care of large single-phase loads—
Comparison of single-phase generator with polyphase generator
and phase converter—Apparatus economy.........232
CHAPTER XV.. SYNCHRONOUS RECTIFIERS.
138. Rectifiers for battery charging—For arc lighting—The arc ma-
chine as rectifier—Rectifiers for compounding alternators—
For starting synchronous motors—Rectifying commutator—
Differential current and sparking on inductive load—Re-
sistance bipass—Application to alternator and synchronous
motor........................234
139. Open circuit and short circuit rectification—Sparking with
open circuit rectification on inductive load, and shift of
brushes........................237
140. Short circuit rectification on non-inductive and on inductive
load, and shift of brushes—Rising differential current and flash-
ing around the commutator—Stability limit of brush position,
between sparking and flashing—Commutating c.m.f. resulting
from unsymmetrical short circuit voltage at brush shift-—
Sparkless rectification.................239
141. Short circuit commutation in high inductance, open circuit
commutation in low inductance circuits—Use of double brush
to vary short circuit—Effect of load—Thomson Houston arc
machine—Brush arc machine—Storage battery charging . . 243
142. Reversing and contact making rectifier—Half wave rectifier
and its disadvantage by unidirectional magnetization of trans-
former—The two connections full wave contact making recti-
fiers—Discussion of the two types of full wave rectifiers—
The mercury arc rectifier................245
143. Rectifier with intermediary segments—Polyphase rectifica-
tion—Star connected;.ring connected and independent phase