Patent EA-019173-B1 (EA)
Title: Multimodule pulse modulator
Inventor: KONOVALOV SERGEJ IVANOVICH
IPC: H02H7/10
Filed: 2011-10-17
Abstract: The invention relates to high-voltage pulse power sources and can be used for generating on load, for example, on a klystron control electrode, a running-wave tube or the like, voltage pulses of rectangular or stepped waveform in a wide range of duration and frequency change of pulses being generated. The invention is aimed at enhancing the reliability of a device during its operation due to lesser fault probability of switches and diodes caused by overvoltage, realization generating on load stepped voltage of different wave form and substantial loss reduction during recharge of load capacitance thanks to practically full energy recuperation, stored in load, in an input source using a method of quasi-resonant recharge of the load capacitance. A multimodule pulse modulator comprises a AC power source connected in series to a transformer with N secondary windings, each secondary winding connected to a rectifier and forms N series connected modules, in each module first control switch is series connected to a diode shunted by second control switch, a diode anode is connected to a rectifier negative terminal, a diode cathode of the first modules connected to a diode anode of next modules diode cathode of the last module is connected to second capacitance output, control inputs of each switch are connected to generator outputs of control pulses, each module is additionally provided with a voltage limiter connected between positive and negative rectifier terminals, a protective diode connected in parallel to first control switch and connected by its anode to diode cathode, resistor connected in parallel to first control switch, an additional DC power source connected by its positive terminal to cathode of the protective diode and by its negative terminal to the rectifier positive terminal, connected in series inductance and a control switch with double-side conductivity connected between the rectifier positive terminal and diode cathode. A modulator is further provided with an external DC power source connected between anode of first module diode and first capacitance terminal, and a generator of control pulses comprises three groups of output terminals, wherein first and second groups comprise by N output terminals each, third group comprises by 2N output terminals, the first group output terminals are connected to control inputs of first switches according to modules numbers, the second group output terminals are connected to control inputs of second switches according to modules numbers, the third group output terminals are connected to control inputs switches with double-side conductivity according to modules numbers. A multimodule pulse modulator comprises a AC power source connected in series to a transformer with N secondary windings, each secondary winding connected to a rectifier and forms N series connected modules, in each module first control switch is series connected to a diode shunted by second control switch, a diode anode is connected to a rectifier negative terminal, a diode cathode of the first module is connected to a diode anode of next modules diode cathode of the last module is connected to second capacitance output, control inputs of each switch are connected to generator outputs of control pulses, each module is additionally provided with a voltage limiter connected between positive and negative rectifier terminals, a protective diode connected in parallel to first control switch and connected by its anode to diode cathode, an additional DC power source connected by its positive terminal to cathode of the protective diode and by its negative terminal to the rectifier positive terminal, connected in series inductance and a control switch with double-side conductivity connected between the rectifier positive terminal and diode cathode. A modulator is further provided with an external DC power source connected between anode of first module diode and first capacitance terminal, a resistor included between capacitance second output and diode anode of first module and a generator of control pulses comprises three groups of output terminals, wherein first and second groups comprise by N output terminals each, third group comprises by 2N output terminals, the first group output terminals are connected to control inputs of first switches according to modules numbers, the second group output terminals are connected to control inputs of second switches according to modules numbers, the third group output terminals are connected to control inputs switches with double-side conductivity according to modules numbers.