1. A machine that converts mechanical energy into DC electrical energy.
2. It is mainly used as a DC motor required for DC motors, electrolysis, electroplating, electric smelting, charging and excitation of alternators. Although power rectifier components are used to convert AC to DC where DC is needed, DC motors cannot be compared to AC generators in terms of ease of use, operational reliability and certain work performances.
1. Working principle
The working model of the DC motor when the generator is running is as shown in the figure. Brushes A and B in the figure are connected to direct current. external load, and the motor is connected by a main motor drags to rotate in the reverse directionclockwise. At present, the figure shows that the direction of the induced potential of component side ab is from end b to end a, the direction of induced potential of component side cd is from end d to end c and the direction of the potential induced on the component side ab goes from end b to end a. The current ia in the component is Bbrush → d → c → b → a → A, the component sides ab and cd generate an electromagnetic force f acting in the tangential direction of the armature circumference will generate an electromagnetic torque Tem. is clockwise and opposite to the direction of rotation of the motor. After rotating 180 degrees, the direction of current ia in the element is from brush B → a → b → c → d → brush A. The direction of current I in the external circuit remains unchanged and the direction of the electromagnetically generated torque Tem remains clockwise.
2. Model ofwork
It can be seen from the above analysis that the DC motor has the following characteristics when operating as a generator:
(1) In each case, the current ia flowing in an armature coil is alternating and the induced electromotive force e generated at the same time is also alternating.
(2) There is a direct potential between the brushes, and the induced electromotive force e and the current ia in the element have the same direction.
(3) The magnetic field generated by the armature current is also fixed in space.
(4) n is in the opposite direction to the electromagnetic torque Tem, and the electromagnetic torque Tem acts as a brake.
Use the circular water wheel to irrigate the earth to explain the principle of the magnetic field generator
It's alternating current! The engine used in hydroelectric generation is a rotating rotor generator due to its high tenif we.
The key is the brush. When the direct current is small, it can be directly converted into direct current through the brush. However, when the hydropower generation energy is large, the brushes cannot be used (this will cause arc discharge). ). So what is sent directly is alternating current, then transformed and distributed.
What is the principle of power generation?
The reason why the water wheel can rotate is mainly due to the gravity of the water in the water tank , breaking the balance of forces in existence. of the hydraulic wheel.
So where does the weight of water come from? It is actually produced by the interaction between the strength of the magnetic field emitted by the earth and the strength of the magnetic field emitted by the magnetic particles in the water. The key here is to achieve continuous interaction strength.
Currently we knowalready that the force is the instinct of the magnetic material, and every phenomenon in the world is caused by the interaction of the forces of the magnetic field. Then people can implement it. magnetic field in the water tank as one. Magnets, think of the earth as one big magnet. The interaction between land, water and the waterwheel breaks the balance of the force of the waterwheel, and the existence form of the waterwheel will change and it will begin to rotate.
Taking advantage of the fact that magnets attract and repel each other and that magnets interact within a certain field space, is it possible to create a perpetual motion machine like a water wheel? ?
The key problem here lies in the acquisition of force and the interaction between the materials of the magnet. The interaction of forces between the magnets breaks the balance of force of the disk, and the. The disk becomes It will spin and connect son tree to the generator to produce electricity.
The principle of electricity generation is that a generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or. other electrical machines to convert water flow, air flow, fuel. The energy produced by the combustion or fission of atomic nuclei is converted into mechanical energy and transmitted to the generator, which converts it. in electrical energy.
The working principle of the generator
In the cylinder of the diesel engine, the clean air filtered by the air filter and the The fuel injector are ejected. The high pressure atomized diesel is fully mixed under the upward pressure of the piston, the volume decreases and the temperature rises rapidly, reaching the ignition point of the diesel. The diesel ignites, the mixturee of gas burns violently and the volume increases rapidly, pushing the piston down, which is called work.
Gasoline generator, the gasoline engine runs the generator, converting gasoline energy into electrical energy. In the cylinder of a gasoline engine, the gas mixture burns violently, expands rapidly in volume, and pushes the piston down to do work.
Whether it is a diesel generator or a gasoline generator, each cylinder performs work in a certain order. The thrust acting on the piston becomes the force that causes the crankshaft to rotate through the connecting rod, thus driving the engine. crankshaft to rotate.