| 摘要 |
FIELD: electricity.SUBSTANCE: additional electric heater connected to diagonal of the three-phase diode bridge, and the second key the control input of which is connected to the second output of the control system, are offered, meanwhile the additional electric heater is formed by two series connected electric heating elements, parallel to one of which the second key is connected, and the control system is implemented with a possibility of formation of control impulses at the first and second outputs and during decrease of voltage of alternate control of their duration from zero up to the switching period, and at first at the second output at change of control signal at its input from the maximum negative value down to zero, and then at the first output at change of control signal at its input from zero up to the maximum positive value.EFFECT: rational energy consumption due to improvement of quality of voltage and current at the input and output of transformer substations and decrease in this regard of losses of power transformers and in networks, improvement of shape of supply voltage of consumers and improvement of accuracy and speed of its maintenance at the set level due to essential reduction of depth of modulation of added voltage.2 cl, 1 dwg |
