![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Social benefits to promote energy-saving products have a certain positive significance, the original use of FO-53-6 in Shanghai, 0.8kW weaving electromechanical Nanjing University of Aeronautics and Astronautics Guo Jigao rectifier R generally used three-phase full-wave rectifier to rectify into DC, charge the battery, for User use.
The stator stator slot is the same as the general motor. Because of its high electrical load and large copper loss, the tooth width is reduced and the groove area is increased as much as possible, with the magnetic tolerance of the teeth and the mechanical strength of the teeth. Most domestic manufacturers and designers use fractional slot windings to reduce the drag torque.
Much depends on the magnetic properties of the permanent magnet, the process and the purpose and capacity of the generator. There are usually two types of rotor structures: radial and tangential magnetization structures, as shown in 2. Most domestic manufacturers adopt tangentially magnetized rotor structure, tangential magnetization is relatively radial magnetization, and magnetic steel utilization rate is high; magnet steel and yoke assembly and bonding and fastening processes are relatively easy. There are also individual manufacturers that have successfully fabricated radial magnetized structural rotors.
(3) The selection of permanent magnets for rotor magnets is 60,000 units. If all FXTY-53-6 and 0.8kW permanent magnet synchronous motors are used for calculation, annual energy savings can be saved: 60000=30769200 (kWh). The pre-industrial electricity bill is 0.80 yuan per kilowatt hour, and the annual electricity cost can be saved by 0.80x30769200=246.53 yuan (10,000 yuan). In addition, the investment in power equipment can be reduced due to the reduction of reactive power, which will also bring huge social benefits.
This allows it to be used in some applications where speed regulation is required to meet different load characteristics, especially those where the units are required to synchronize or require each unit drive to maintain a certain speed ratio.
(3) The speed control circuit is simple and often only needs to form a simple open loop system with the variable frequency power supply. Compared with the usual AC and DC speed control systems, it has the characteristics of simple circuit, small time constant, high precision and wide speed range.
The choice of generator rotor material should be determined according to the specific technical requirements. The permanent magnet alloy materials mainly include: rare earth permanent magnet alloy: the magnetic energy product is high, and the magnetic stability is easy. The magnetic steel can be magnetized first, and then assembled. The generator made of this alloy is small in size and high in efficiency. However, it is expensive and difficult to use in civilian products and small generators.
4. Precautions The mechanical structure of the permanent magnet synchronous motor is similar to that of a general asynchronous motor, so its use, maintenance and repair are similar to those of an asynchronous motor. However, because the permanent magnet material is embedded in the rotor, the following matters must be noted: the stability of the energy is related to temperature, mechanical stress, shock vibration and other factors, so the above factors should be applied in the installation, use and maintenance of the motor. Note that in order to maintain the magnetic properties of the permanent magnet material and the working point of the magnetic steel, otherwise the electrical performance of the motor will change, and even the permanent magnet material will be demagnetized, so that the motor can not work normally.
C2) The permanent magnet material is embedded in the rotor. Therefore, when the motor is repaired and disassembled, the rotor (especially the rotor drawn to the outside of the stator) should be placed on a clean, non-magnetic material plate and keep the surrounding environment clean. Iron filings and debris adsorption. (Editing Witch) Table m No. rated output power (W) Rated output voltage (V) Rated speed - 10001000AC220490 GB GB10760.1―89 Small wind turbine technical conditions are non-mandatory standards, generator power and speed can be based on The local wind conditions are determined.
AlNiCo permanent magnet alloy: excellent performance, has been widely used. However, it is easy to demagnetize, and the rotor must be assembled and then magnetized; the material is hard and brittle, and the processing is difficult, so it is rarely used.
Qin Tie Boron Permanent Magnet Alloy: has the advantage of a rare upper permanent magnet alloy. However, its reversible temperature coefficient is low and it is difficult to apply in a high temperature environment. At present, 120 non-demagnetizing alloys have been developed, and the price is only about one-third of that of rare earth alloys. It has been applied in kilowatt-class permanent magnet wind turbines, and the effect is very good.
Ferrite permanent magnet alloy: It is the lowest price of permanent magnet alloy material, only a few tenths of rare earth permanent magnet alloy, and has been widely used in small-scale permanent magnet wind turbines of 100-watt class. Its magnetic energy product is low, and the generator made is large. However, it has a large reversible temperature coefficient and is easy to stabilize. It can be assembled after magnetization, so it is widely used.
3. Model specifications The technical parameters of permanent magnet synchronous generators produced by some domestic manufacturers are shown in Table 1. The power generation device is small. When selecting the generator, it should be noted that the starting resistance torque is small at the same rated output power and rated voltage ( The fan can be started quickly and at a low speed. The axial size of the generator should be small and the weight should be light. In particular, the rotor structure should be firm to avoid damage to the rotor during stall. The 100W class generator is the preferred permanent magnet generator. Other types of generators can be selected if the performance requirements are met. The kilowatt-class generator unit has a large diameter and low speed. If there is no speed increasing mechanism, multi-pole low-speed permanent magnet generator (such as outer rotor) must be used. AC asynchronous motor can also be used, but its shortcoming is effective use. The speed range of wind energy is relatively narrow.
In addition to the general mechanical performance of electrical and electrical performance inspection, but also according to the particularity of its use, pay attention to check: U) starting resistance torque should meet the requirements of the national standard, see Table 2. Table 2 power (w) maximum starting resistance torque (Nm) The motor speed should be less than 65% of the rated speed of the taper.
If the bonding and assembly are not strong, it is easy to appear that the rotor and the rotor rub each other, the so-called "broom" phenomenon. This phenomenon has occurred in many manufacturers of generators, so an overspeed test is required. Generally, according to the national standard GB10760.189, "when the generator is under no-load condition, it should be able to withstand 2 times the rated speed, and last 2 minutes, the rotor structure should not be damaged and harmful deformation."
Output rated power. Due to the large copper loss of this type of generator, after the temperature rise of the generator is stabilized, the output power will not reach the rated requirement, which is not allowed and should be noticed by the user.
At present, wind power generation devices have been widely used in grassland living and electricity (such as Inner Mongolia), purse seine culture (such as Jiangsu Yancheng Dazhong Lake and Changzhou Cadmium Lake) and shipping (such as Wuhu Steamship Company).
(Editing Jiao Ying) Features large conductance, no flow under high temperature, no drying, cooling, flame retardant, conductive, arc suppression, heat conduction, reduced contact resistance, anti-electrochemical corrosion, good performance.
Use in electrical quiet point (busbar lap joint, switch moving, static contact surface, aluminum wire connection surface).
The function is to prevent the occurrence of frequent electrical failures in the static point of the static point and burn out the components; reduce the workload of emergency repair and repair and the infinite hidden danger caused by the deterioration of the static point. It is an advanced Yin segment that improves the reliability, safety and economy of quiet point operation. FG-1 is purple (copper-copper special), FG-2 is yellow (copper-aluminum-copper use) FG-2 can be used instead of FG-1.
Yantai pain technical phone: production ship issuing area SDC Zhi Ning ç‚» prisoner tSDH intelligent Tongduo male bookmark4 for high and low voltage switchgear, box substation, dam corridor and mine electrical equipment in high humidity (or condensation) environment Self protection. According to the user's needs, different types of controllers can be used to adopt different control modes: decondensation type; humidity (35~95% RH) control type; relative temperature difference inside and outside the cabinet; constant temperature control type in the cabinet.
Tianyue City Construction H Day Factory bookmark5 Address: No. 238, Zhonghe Street, Bujin, Tianjin
Wuxi Feiyiya Environmental Protection Technology Co., Ltd. , https://www.feiyya.com