| 摘要 |
FIELD: electrical engineering. ^ SUBSTANCE: invention may be used in control systems with valve-type frequency converters for electrotechnics. Method of autonomous matched resonant inverter that contains valve switchboard arranged on controlled valves with reverse conductivity, with filter capacitor and loading parallel oscillating circuit, which is formed with load with inductivity and compensating capacitor connected to output terminals of valve switchboard through switching throttle, consists in generation and alternate supply of control pulses to controlled valves of valve switchboard, which form direct and reverse half-waves of voltage at the load. Time interval and level of instantaneous value of switching throttle current are preset. Instantaneous values of voltages are measured in controlled valves of valve switchboard, as well as current of switching throttle. Logical signal is generated, which accepts true value in case of simultaneous application of direct voltage to controlled valves of valve switchboard that form direct and reverse half-waves of voltage at the load. In case of true value of logical signal time interval count is permitted. Alternate control pulse is formed and sent to controlled valves of valve switchboard on expiration of preset time interval. Control pulse is removed, and controlled valves of valve switchboard are disconnected at the moment when measured instantaneous value of current is equal to preset level of instantaneous value of switching throttle current. ^ EFFECT: higher reliability of autonomous matched resonant inverter operation. ^ 2 dwg |
