Method for controlling the firing angle of an electric motor

Details Method for controlling the firing angle of an electric motor Method for controlling the firing angle of an electric motor

2007-01-23

2007-01-23

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S434000, C318S721000

Reexamination Certificate

active

11185308

ABSTRACT:
Disclosed is a method for controlling the firing angle of a signle-phase AC powered electric motor which is triggered by means of at least one locking electronic switch, especially a triac (T1and T4) located between the distribution voltage (UV) and at least one motor winding (A, B). According to said method, intervals are defined within which the triacs (T2to T4) are to be fired according to the curve of the distribution voltage (UV) and the voltage (UEMK) induced in the respective winding in order to allow the motor to start as quickly and smoothly as possible and run quietly and at high efficiency.

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Stephen J. Chapman, “Electric Machinery Fundamentals”, third edition, McGraw-Hill Publishing, 1999. p. 274, example 5-2 shows phase relationship between the induced voltage and phase voltage of a generator.

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