Buy a three-phase four-wire two-way knife switch (search for it on Taobao). Connect the middle one to the 1st neutral line, 2nd, 3rd and 4th live lines at the top of your current electrical network. Switching power supply. You don't need to worry about the ground wire. The top end of this switch blade is connected to the mains supply by removing it from the top end of your current main switch and connecting it. The first terminal at the bottom end of the gate knife is connected to the neutral line which produces 220 volts of electricity from the generator. The remaining terminals 2, 3 and 4 are all connected together with a single wire and then connected to the voltage. generator wire. When using the generator, the blade is positioned at the lower end. When using the mains, the blade is positioned at the upper end. Both ends do not needn to be positioned in the middle. This wiring method uses single-phase 220 V. If a three-phase generator is used, terminals 2, 3 and 4 at the lower end of the blade cannot be connected together. with a thread. Please pay attention to the differences.
How to connect a three-phase transformer and a two-phase transformer?
First of all, there is a problem with your question. The three-phase four-wire system refers to the output type of the generator, that is, it consists of three live wires and one neutral wire drawn from the stator winding outward. The brush is a part slidably connected to the slip ring to provide exciting power to the rotor coil. These are two components of the generator and cannot be confused.
The statement of four brooms is not correct. These should be four sets of brushes, including three-phase rotor brushes (connected to thex three-phase rotor slip rings) and an earthing brush. If there is no grounding brush, the rotor must have two-phase input and each phase has two brushes. You have to see the engine structure to know that.
This has nothing to do with the external driving force and whether the rotor needs electrical power. If an external force causes the rotor to rotate and no exciting magnetic field is formed on the rotor, the stator will not generate electrical energy. anyway. Because the basic principle that a generator can produce electricity is that the rotor generates an exciting magnetic field, and after the rotor rotates, it cuts off the stator winding coil to generate an induced potential and produce electrical energy.
If the permanent magnets form the excitation magnetic field of the rotor, there is in fact no need for brushes, and the permanent magnets form a fieldstable magnetic excitation. Another method is to use the residual magnetism of the stator winding. The rotor is of the squirrel cage type and connected to the capacitor to form an excitation magnetic field with a phase angle with the stator magnetic field. When the rotor turns, electrical energy is induced. is generated on the stator winding.
When wiring, use the “three-phase four-wire” standard for wiring, that is, three live wires and one neutral wire.
When the voltage of the three live wires is 380 volts, use a live wire to match the neutral wire. Most electrical devices are currently connected this way. If the three-phase alternating voltage is 380 volts, three elements of identical impedance should be used, which must first be connected in a star, then diagonally. A three-phase voltage imbalance will induce an increaseon reverse torque in the motor, which will cause motor temperature to increase, efficiency to drop, power consumption to increase, vibration, output loss and other effects.
The imbalance between phases will reduce the service life of electrical equipment, accelerate the replacement frequency of equipment parts, and increase the maintenance cost of equipment. Cross-switching and other methods should be used to reasonably distribute the asymmetric load on each phase and try to balance it. In the daily work of electricians, it is sometimes necessary to convert three-phase power to two-phase power to meet production needs. So what is the method of converting three phase power to two phase power and how to connect three phase power to two. -phase power. Let's learn it together. Three-phase alternating currentSé is a form of electrical energy transmission, called three-phase energy. Three-phase AC power is a power supply consisting of three AC potentials with the same frequency, amplitude and phase differences of 120° from each other.
Three-phase alternating current has many uses. Most AC electrical equipment in industry, such as motors, uses three-phase AC, which is the often-mentioned three-phase, four-wire system. In daily life, single-phase power supply, also called lighting power, is mainly used. When lighting electricity is used for power supply, one phase of the three-phase power supply is used to power electrical equipment, such as household appliances, and the other wire is the fourth wire of the three-phase four-wire system. wire, which is the neutral wire. The neutral line is drawn fromu neutral point of three-phase electricity.