Реактивная мощность электроприводов постоянного тока с однофазными тиристорными выпрямителями
| Jazyk: | ukrajinština |
|---|---|
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Lighting engineering and power engineering; № 1 (2015); 18-22 Светотехника и электроэнергетика; № 1 (2015); 18-22 Світлотехніка та електроенергетика; № 1 (2015); 18-22 |
| ISSN: | 2079-424X 2415-3923 |
| Popis: | Реактивна потужність тиристорних електроприводів постійного струму визначається змінними складовими випрямлених напруги і струму. Уведені поняття коефіцієнтів реактивного струму і реактивної напруги як відношення змінних складових до постійних складових. Залежність останніх від кута керування тиристорами, електромагнітної сталої кола якоря і струму навантаження була отримана на комп'ютерній моделі. Реактивная мощность тиристорных электроприводов постоянного тока определяется переменными составляющими випрямленных напряжения и тока. Введены понятия коэффициентов реактивного тока и реактивного напряжения как отношение переменных составляющих к постоянным составляющим. Зависимость последних от угла управления тиристорами, электромагнитной постоянной цепи якоря и тока нагрузки была получена на компьютерной модели. Reactive power of thyristor electric drive of direct current is determined variable the constituents of rectify voltage and current. Implement concept of coefficients of reactive current and reactive voltage as attitude of variables of constituents toward permanent constituents. These dependence from the angle of control for thyristor, electromagnetic permanent circles of armature and current of loud was got on a computer model. Difficult character of dependence of coefficients of reactive current and voltage from angle of control for thyristor, electromagnetic permanent time of circle of armature and practically eliminate possibility of its receipt loading on the billow of engine in an analytical kind. Therefore will determine such dependence on a model with subsequent approximation by an analytical polynomial. As thyristor electric drive behave to the class of the determined systems, will conduct a computer experiment. The systems name determined when functional dependences of parameters allow simply to define copulas and which are exactly described differential equalizations. Of principle difference between a model and computer experiment it is not, but at a computer experiment there is possibility more wider to change parameters, absolutely exactly to set them and stabilize in the process of experiment. Then the method of determination of reactive current and reactive voltage consists in the following. Set the absolute and relative value of speed in relation to nominal, which is equaled by the relative value of permanent component tension in relation to nominal tension. After a formula determine the necessary angle of control for thyristor.Set the absolute and relative value of the tourqe loading, which is equaled by the relative value of permanent constituent of current in relation to a nominal current. According to information received determine the coefficients of reactive current and reactive tension after formulas. After the absolute values of permanent constituents of current and tension determine the absolute values of virtual values of accordions of voltage and current. Calculation of capacity of compensating condensers for control with thyristor will conduct through equality of virtual values of energies of the magnetic field of spool and electric field of condenser. |
| Databáze: | OpenAIRE |
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