Large and medium-sized equipment frequency conversion-power frequency combined driving system

Abstract

The invention relates to the technical field of frequency conversion, and discloses a large and medium-sized equipment frequency conversion-power frequency combined driving system, which comprises a power frequency power supply, a rectifying unit, a current sensor, a high-capacity capacitor, a voltage detector, a temperature detector, an inverter, a controller, a storage device and a computer. The output end of the power frequency power supply is connected with the input end of the rectifying unit. The output end of the rectifying unit is connected with the input end of the current sensor, the output end of the current sensor is connected with the input end of the high-capacity capacitor, the output end of the high-capacity capacitor is connected with the input end of the voltage detector, and the output end of the voltage detector is connected with the input end of the temperature detector. The tantalum oxide film is stable in chemical performance, and the tantalum anode substrate Ta205 can resist strong acid and strong alkali, so that the tantalum anode substrate Ta205 can use solid or acid-containing liquid electrolyte with very low resistivity, the loss of tantalum electrolysis is smaller than that of aluminum electrolytic capacitance, and the temperature stability is good.

Description

technical field [0001] The invention relates to the technical field of frequency conversion, in particular to a frequency conversion-power frequency combined drive system for large and medium-sized equipment. Background technique [0002] Frequency conversion is to change the power supply frequency, so as to adjust the load, reduce power consumption, reduce loss, and prolong the service life of equipment. , Change the fixed grid frequency of 50Hz to a variable frequency of 30-130Hz. At the same time, it also makes the power supply voltage adaptable to 142-270V, which solves the problem of affecting the operation of electrical appliances due to the instability of the grid voltage. The technology of realizing AC control by changing the AC frequency is called frequency conversion technology. [0003] At present, there are frequency conversion equipment for large and medium-sized equipment on the market, which has obvious energy-saving effect when working in the medium and low...

AI Technical Summary

Problems solved by technology

[0003] At present, there are frequency conversion equipment for large and medium-sized equipment on the market, which has obvious energy-saving effect when working in the medium and low load range. Aluminum electrolytic capacitors, and aluminum electrolytic capacitors are large in size, have electrolyte, are easy to volatilize, have a short life, relatively large impedance, generate heat, accelerate volatilization, and the capacity will drop sharply

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