Advice 1: How to make a stand for testing alternators

Bench check alternator is designed to control technical condition taken from the car alternator and their parts – voltage regulator and rectifier. In the factory version it is a complex electronic device with display digital display for displaying measured values.
How to make a stand for testing alternators
Instruction
1
Stand the test generator is fairly expensive equipment, not available to every car owner, so some motorists prefer to do them with my hands. So device for the promotion of the generator can be built out of the motor with the clutch decommissioned industrial sewing machines that were previously produced at the Podolsk or Orsha mechanical plants.
2
It is preferable to use motors more power – 1 kW, 2800 Rev/min. With such a home-made stand you can measure the following parameters: operating voltage generator, the number of revolutions and the load current. In principle, it is possible to use other types of electric motors with pulleys under the belt corresponding to the generator. It remains to sum up to the generator to 12V, connect according to the diagram. Do not forget the external relay (if any), and weight.
3
Then start the engine and measure the voltage at the output of the generator. Check the alternator on the bench gives the opportunity to determine the status of the generator and its main characteristics nominal. It is necessary to observe a very important requirement is that the alternator brushes have to be carefully lapped to the contact collector rings, the rings must be clean. So, install the generator on the stand, turn the motor on stand, set with the help of rheostat output voltage of approximately 14V, and the frequency of rotation of the rotor – up to 5 thousand rpm.
4
After two minutes of operation in this mode, measure the amperage provided by the generator. A working generator will show at least 44 A. If the output readings will be significantly less, it could indicate problems in the windings of the rotor and the stator, damage to the valves, the wear of the slip rings and brushes. If you have any suspicions about the malfunction of the valves of the rectifier Assembly of the alternator, then check the amperage returns to preheat the generator.

Advice 2: How to make a stand

The information stand is an important part of the interior office of almost any company involved in sales. And not just office. You can order this stand with professionals or do it yourself. For this, we need to get the piece of plastic the size of the stand, to make pockets for leaflets and brochures, attach these pockets to write on the booth header and insert it into the frame. Let us examine these points in more detail.
How to make a stand
Instruction
1
To stand perfect PVC plastic. It can be cut with an ordinary office knife, giving the workpiece the desired size.
2
Pockets is more complicated. They can be made of plastic or plexiglass PET, but to cut such materials with a utility knife will not work. In addition, you will need to handle edge. And for some types of pockets, the material will have to bend. Here you will need to heat the plexiglass or plastic PET with the help of infrared radiation. The most simple and proven way to heat these materials is from their local heating of the nichrome wire heated by an electric current. The material is heated by heat exchange between it and the string, and also through the absorption material coming from the strings of infrared radiation.
3
Ready-made pockets simply attach to the stand base. This is done using screws and nuts or double-sided tape.
4
The caption on the information Board by hand does not write. Letters and logos are often cut from the PVC film for cutting plotter. If the plotter is not at hand, it is possible the letter cut out stencil with scissors.
5
And the last frame. To do it should be a miter saw because the hacksaw is uncomfortable to cut at an angle of 45 degrees. Although if the wizard grow from the right place, you can do a simple file. After fabrication the frame will be enough to insert it into the stand and hang it or put it in place. That's all.

Advice 3: How to make a generator from a motor

Most electric vehicles has the property of reversibility. This means that a motor can be used as generators. Exactly how, depends on the type of engine.
How to make a generator from a motor
Instruction
1
Before you use the motor as a generator, make sure that it is not supplied external power.
2
To generator became commutator motor with a permanent magnet on the stator, Unscrew it until about the thousands of rpm. He will begin to develop a pulsating DC voltage, the polarity of which depends on the direction of rotation. Do not connect filter capacitor or battery directly - if you stop the generator it will start to discharge through it. To prevent this, use a diode or relay reverse current. So the battery is not recharged yet, use the current limiter charging or relay-regulator.
3
Commutator motor with series or parallel excitation will turn into a generator with independent excitation. To do this, disconnect the stator winding, submit it to DC voltage from the battery, and then Unscrew the motor. Pull the collector DC voltage, the polarity of which depends on the rotation direction and the polarity of the voltage winding. The power consumption of the coil, much less power, which can be removed from the generator. When the voltage appears, you can switch the excitation winding powered by a generator.
4
It is very convenient to use as generators are stepper motors. They develop a significant voltage at a relatively low speed. Even bringing this engine into motion with your fingers, without using any performance-enhancing gear to make a light bulb glow, led. It has several windings, each of which can be removed alternating voltage. If you wish to turn it into a permanent, use the normal bridges.
5
Induction motor working as a generator by itself will not, because there is no rotor magnetic field. Take three of a capacitor of a few tens of microfarad. They should not be electrolytic, and mandatory paper. Turn on one of them between terminals for first and second phases, the second between the findings for the second and third phases, and the third between the terminal for the first and third phases. Connect the load only after the promotion of the generator. Remember that it produces the same high voltage as that for which the engine is designed.

Advice 4: How to make a generator from induction motor

The induction motor contains no permanent magnets either on the stator or on the rotor. Its rotor is short-circuited. Therefore, to ensure that such an engine could be used as a generator, it is necessary to use additional elements.
How to make a generator from induction motor
Instruction
1
Motor windings connect in the traditional way - with a triangle or a star, depending on whether the output voltage of the generator you wish to receive. In both cases, it will be three phase. The motor is dual voltage (through fraction - fewer of them corresponds to the voltage between any two phases when enabled, a triangle, and more - turning star.
2
Take three non-polar capacitor with a capacitance of about 20 microfarads. They in any case should not be electrolytic - even a non-polar capacitors of this type are not suitable. Their rated voltage should be not less than 500 V. make Sure, using a DC voltmeter, they are discharged, if necessary discharge to a conventional incandescent lamp.
3
Connect the capacitors as follows:
the first is between phases A and B;

- the second - between phases B and C;

- third - between phases A and C.
4
After the motor and capacitor install three-phase machine which allows to disconnect the generator from the load. If it to untwist when the connected load, it may not begin to produce voltage.
5
Connect the load after the machine, the machine itself off. Loosen the engine up to rated speed, wait a few seconds, then turn on the machine. Voltage goes to the load.
6
Do not use in conjunction with a homemade asynchronous generator ferroresonance stabilizers, because the frequency of voltage produced by them is unstable. Don't feed him loads sensitive to changes in voltage and frequency.
7
If you want to install a generator on a stationary bike, as well as to improve its electrical part, use the tips from the page whose address is given below.
Note
Remember that the generator produces life-threatening voltage.

Advice 5: How to make hydrogen generator

Hydrogen generator – a device generating hydrogen from water on Board the vehicle. The resulting gas is fed into the intake manifold of the engine, providing fuel savings and in some cases the increase of its capacity. In the US, these industrial generators are manufactured and cost from 300 to 800 dollars. In the Russian context have to do everything yourself.
How to make hydrogen generator
You will need
  • - polyethylene canister;
  • plate and the electrodes;
  • - connecting wires;
  • - the hoses and the clamps;
  • sealant and sealing tape;
  • - silicone rubber.
Instruction
1
To build a simple generator pick a suitable container for the water. Inside the tank, install the plate. Through the container cap to the plates move the electrodes. Cover or make easily removable or provide it hermetically close the hole to refill the water. Also at the top of the generator make gas outlet pipe and the hydrogen supply into the intake manifold. Cover must be hermetically sealed. Using high-quality insulation materials between the plates, you will reduce power losses.
2
Obtained when operating the generator, ensure the mechanical connection of electrical leads and plates are not loose. This can lead to heated and even arcing, that is unsafe in the fire relation. The body of the generator must be robust enough to not be damaged by vibration. To give greater strength glue to the hull plane of Plexiglas or ribs of the same material. For the insulating cover gasket, use silicone rubber with a thickness of 1 mm.
3
For the modernization of the resulting generator to fit a second tank mounted above the level of the first. Both reservoirs need to connect two tubes. The first – from the bottom of one tank to the bottom of the other, for water. The second connects the top of the tanks to drain the gas. The second tank will serve to store water and gas, and the first one to directly convert water into gas. In addition, the product gas in the transition to the upper reservoir would be to skim from small particles of liquid. The location of tanks shall be such that the length of the connecting hoses is minimized.
4
The electronic control unit generator assemble yourself, if you have skills in electronics. If no skills, order it to specialists. The control unit must automatically change intensity of current supplied to the plates is directly proportional to the engine speed. Pre-empirically set the desired power (amperage on the plates) at idle and maximum power. It will be respectively the minimum and the maximum power of the generator. The control unit needs to take the control signals from the flight sensors of the vehicle.
5
After installing the hydrogen generator be sure to check all hose connections for leaks. To do this, apply with a sponge and soap suds to all connections. In this case, any leak will manifest itself is inflated by the gas bubbles. A leak of hydrogen not only affects the explosion safety design, but also on the fact that reducing fuel consumption. In other words, even the slightest leak can cause negative effect, the car will consume an increased amount of fuel.
Note
All parameters of the generator you will need to be calculated independently with respect to the model of your car.
Useful advice
The generator is useful to set inside of a car. In the winter it will warm, that will provide good circulation of the liquid inside of it. In the summer it will not be too hot, which leads to the loss of efficiency of the generator.

Advice 6: How to design the stand of fire safety

Fire safety at the enterprise is largely determined by the quality of promotional materials. Usually in the institution equip the area of fire safety, one element of which is an information stand. On it place the materials, demonstrates how to act in the event of fire.
How to design the stand of fire safety
You will need
  • stand;
  • - propaganda posters;
  • - other materials to fill the booth.
Instruction
1
Select a location for placement of the stand of fire safety. If you do not have a dedicated area, place the dashboard in the most visited place available for all to see. This can be, for example, the wall at the entrance to the personnel Department, canteen or corridor. If the company has multiple floors, each of them needs to be the plan of evacuation in case of fire.
2
Make the title stand. It has to indicate its purpose, for example: "the Area of fire safety", "Fire safety" or "How to act in case of fire". The name of the stand should be done in large letters and well understood on the background of other informational materials.
3
Divide the prepared stand into different sections, giving each a subtitle. Provide the stand a clear instruction on how to use a fire extinguisher and an evacuation plan in case of fire. The stand needs to be General recommendations for the prevention of fires and the basic rules of conduct in case of occurrence of emergency situations.
4
Large print scroll to the phone numbers of emergency services, and the data of the official person responsible for fire safety at the enterprise.
5
Use for booth posters, which shaped the actions of personnel in case of fire. Explanations should be short and precise. In the event of an emergency time for detailed acquaintance with the small text long instructions will not.
6
Highlight at the stand of choice for departmental orders and instructions governing the actions of officials in case of emergency situations. Consider also the presence of pockets for handouts. These may be leaflets or booklets, which in a condensed and visual form is described recommendations for actions in case of fire and measures to prevent it.
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