Basic structure The generator is equipped with a reactive reactance combined composite phase compound excitation device based on the basic structure of the brushed three-phase alternator shown in Figure 3-4, and its external shape is shown in Figure 3-19, which includes the reactance converter. , three-phase rectifier bridge and magnetic field varistor. As a controllable phase compound excitation device, it is also necessary to install a shunt automatic voltage regulator (STL) low-power generator without a shunt automatic voltage regulator, and the voltage performance can meet the requirements of use. 2. Working principle Figure 3-20 shows the principle circuit of the reactive-reactor composite phase-complex three-phase alternator. When the generator is driven by the internal combustion engine to the no-load speed near the rated value, the residual magnetic field of the rotor core is used, and the induced voltage of the generator stator secondary winding is phase-shifted by the secondary winding of the reactance converter to provide a generator no-load voltage. The voltage component Ifu of the AC excitation current is rectified by the three-phase rectifier bridge group to provide no-load excitation current to the generator rotor winding. The stator main winding outputs a three-phase voltage after serially connecting the reactance converter to the secondary winding. When the load is put on the generator, the power converter anti-multiplexed excitation effect, a current component in the secondary winding and the load current induces a corresponding AC generator excitation current Ifi, therefore, the load and Ifi two Ifu The excitation current components are geometrically superimposed and subjected to three-phase rectification to provide a load excitation current to the rotor windings, thereby maintaining a constant generator terminal voltage. The steady-state voltage regulation rate of the uncontrollable composite phase compound excitation generator is generally not more than ± 5%. In order to further improve the voltage regulation accuracy, a shunt automatic voltage regulator can be added. STL type shunt automatic voltage regulator specially designed for phase compound excitation generator , there are 6 terminal blocks, wherein the two contacts of the mark "AC400" are respectively connected to the generator terminal U, W phase, F1 contact and three-phase rectifier bridge group. The "+" terminal is connected, the F2 contact is connected to the U-phase terminal of the AC side of the three-phase rectifier bridge group, and the R1 and R2 contacts are connected to the potentiometer. Mold HVAC VENTS BEFORE AND AFTER Heat Exchanger Mold,Heat Exchanger Mould,Heat Exchanger Injection Mold,Plate Heat Exchanger Mould Liaoning LotusNine International Trade co.,ltd , https://www.lj-heatexchangers.com
Mold infestation usually comes with a musty odor. If there is mold in your HVAC system, you should be able to smell the strange musty odor in multiple adjacent rooms. If the mold problem is quite severe, you should be able to spot the growth around the ducts, in the vents and the other parts of the ductwork. The spores are too small for spotting without specialized equipment, and you will not see any other overt signs until the infestation is rampant. In most cases, people have to rely on their sense of smell to detect the presence of this stealthy intruder in their homes.
What causes mold infestation in the HVAC air ducts?
A warm location with high water vapor content is particularly prone to mold buildup within the ducts. Water vapor can form within the duct system when cold air passes through, and when there is high water vapor content in the outside environment, the water droplets usually collect instead of evaporating. It forms the most conducive environment for mold growth. The nutrition for the mold usually comes from dust, dirt, dead skin cells, pollen, and animal dander that collects over months inside the duct along with the water.
What are the signs of mold in air ducts?
Here are a few definitive signs of mold growth within home HVAC systems:
A strong mildew-like or musty smell throughout the house or at least in a few adjacent rooms.
Your nose, throat, and eyes feel irritated when you switch on the air conditioning or step inside an air-conditioned room.
You are experiencing allergic symptoms including a runny nose, rashes, and watering eyes.
You or your family is suffering from unexplainable headaches that go away when you step outside.
You feel nausea, fatigue, and dizziness only when you are home.
You can see the mold growing within the intake vents and around the air ducts and drip pans.
Therefore, if you live in a warm climate and your home smells musty all the time, you have the perfect reason to suspect a mold infestation within the central air conditioning system. You should never wait for the visible signs of infestation to manifest before taking action. You may not be able to see specific sections of your HVAC ductwork from the outside. In that case, you should ask for professional help.
How can homeowners tackle the problem of mold and how to get rid of mold in air ducts?
Sometimes, the mold problem is not overwhelming, and homeowners prefer to deal with the issue on their own. It calls for some robust DIY mold removal techniques. The EPA recommends the employment of professional mold removing services when the suspected mold cover spreads over ten sq ft. If the infestation in your heating ducts is not as severe, you can try removing the growth with ingredients that you can find at your local Home Depot. Here is information on how to get rid of mold in air ducts.
Removing Mold from Your HVAC System:
Selection of the cleaning solution is the first and the most crucial step that decides the fate of the HVAC system inside your home and ultimately if you are successful in how to get rid of mold in air ducts. The cleaning agent you choose can either remove mold or let it fester secretly. Therefore, you need to be cautious when selecting a DIY solution for your mold problem.
Basic structure and working principle of reactive-reactor composite phase-complex three-phase alternator
Basic structure and working principle of reactive-reactor composite phase-complex three-phase alternator diesel generator | diesel generator price / 2018-09-25
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