An elementary book on electricity and magnetism and their applications . V Connection Block Spring. Stationary Fig. Starting WindingCut out of CircuitCircuits Automatic Switch 6. — Diagram of split-phase method of starting single-phase inductionmotor. motor. (1) If the motor is small it can be given a pull by hand ;then the switch is thrown in and it goes whichever way it isstarted. (2) It is also possible to start a single-phase motorby starting it as a two-phase motor. This is done by splittingthe alternating current into two currents differing in phase,a result which may be accomplished by
An elementary book on electricity and magnetism and their applications . V Connection Block Spring. Stationary Fig. Starting WindingCut out of CircuitCircuits Automatic Switch 6. — Diagram of split-phase method of starting single-phase inductionmotor. motor. (1) If the motor is small it can be given a pull by hand ;then the switch is thrown in and it goes whichever way it isstarted. (2) It is also possible to start a single-phase motorby starting it as a two-phase motor. This is done by splittingthe alternating current into two currents differing in phase,a result which may be accomplished by dividing the circuitinto two parallel circuits (Fig. 276) with different reactances. ALTERNATING-CURRENT MOTORS 401 For example, the starting winding ordinarily consists of finewire and thus gives this winding high resistance, or a chokingcoil in one branch offers inductance and so retards the cur-rent. When the rotor is up to speed, the extra circuit iscut out by an automatic centrifugal switch. This method ofstarting is called the split-phase method. The combiningof these two currents produ
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
