Inverter circuit of drive module of power supply system of buried sewage treatment equipment ventilator room

Abstract

The invention discloses an inverter circuit of a drive module of a power supply system of a buried sewage treatment equipment ventilator room. The power supply system of the buried sewage treatment equipment ventilator room comprises a power supply device arranged outside a ventilator room body and a loading device arranged in the ventilator room body. The drive module is arranged between the power supply device and the loading device. A first lightning protection circuit is arranged between the input end and the ground end of the drive module. A second lightning protection circuit is arranged between the output end and the ground end of the drive module. The drive module comprises a rectifying circuit, a filtering circuit and the inverter circuit. The inverter circuit comprises a power tube drive chip. The power tube drive chip is connected to the power output end of a microprocessor circuit so as to drive corresponding power tubes to be switched on and switched off alternately according to a pulse width modulation signal output by a microprocessor of the microprocessor circuit. The performance of the power supply system can be improved at least in one certain aspect of safety or interference resistance or controllability or the like.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a power supply system and ancillary facilities of a fan room of an underground sewage treatment equipment. Background technique [0002] The buried sewage treatment equipment is a kind of sewage biological treatment system with biofilm as the main body of purification. It has the characteristics of low consumption, stable operation and convenient maintenance, so it has a wide application prospect and promotion value. [0003] Typical buried sewage treatment equipment includes grid wells, regulating tanks, primary sedimentation tanks, dynamic oxidation contact tanks, clarifiers and fan rooms connected to the dynamic oxidation contact tanks; the dynamic oxidation contact tanks include reactors The main body, the inner shell of the reactor, and the rotary-cut agitator; the inner shell of the reactor is arranged inside the main body of the reactor, and its bottom opening communicates...

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Problems solved by technology

[0005] There are deficiencies in the design of the above-mentioned fan room power supply system: First, the lightning protection measures are not good enough. When the lightning current is too strong, a small part of the lightning current may enter the load equipment, which will cause the load equipment to be damaged under the impact of the lightning current residual voltage. , which makes the system less secure and greatly shortens its service life; second, the anti-interference measures are not ideal, and the load equipment is easily disturbed by factors such as power supply and external environment, which has a great impact on the stable operation of the load equipment; The reason is that the control is not convenient enough, and the adjustment of its control parameters is not flexible enough to meet the needs of users well.

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