Mining high-voltage frequency converter with explosion-proof type
A high-voltage inverter and explosion-proof technology, which is applied in the field of high-voltage inverters, can solve the problems that high-voltage inverters do not have explosion-proof functions and cannot be applied, and achieve good explosion-proof effects, fast and convenient maintenance, and high electrical isolation capabilities. Effect
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[0039] The number of groups of power units 210 connected in series is five groups, and the power circuit is a high-voltage alternating current of 6000V. Then, the voltage amplitude output by each group of power units 210 is set to be a pulse waveform of ±693.5V, and the time difference between the pulses between adjacent power units is 1 / 5 switching period. The phase control unit 223 is a CPLD FPGA programmable module. The dual DSP CPU unit 222 is a dual 32-bit DSP CPU unit.
[0040] Then the working principle of the present invention is as follows: the three-phase high voltage enters the high-voltage side of the phase-shifting isolation transformer 110 of the present invention through a switch, and is stepped down and phase-shifted by the phase-shifting isolation transformer 110, and is supplied by the low-voltage side of the phase-shifting isolation transformer 110 Power unit 210. The output ends of the three phases of each adjacent power unit of the five groups of power un...
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