The magnet is good.
1. High strength. The magnets in the casing of large generators are strong and strong, while the steel is weak.
2. Performance advantages. The large generator casing magnet has an iron core, has hysteresis and cogging effect, has no iron loss, and has low starting torque. The steel magnet has no iron core, has no hysteresis and cogging effect, has iron loss, and has high starting torque.
How to wind the copper wire of disc-type iron coreless generator
At present, there are about 30 domestic companies capable of mass-producing permanent magnet motors, among which the leading listed companies The companies include:
Dayang Electric (002249), Wolong Electric (600580), Zhongke Sanhuan (000970), Sinoma Technology (002080),
Beikang Magnetic Materials (600980 ), Sinosteel Tianyuan (002057), Hengdian East Magnetics (002056), Tiantong Co., Ltd. (600330),
Ningbo Yunsheng (600366), Mindong (000536), ? Aerospace Electric (002025) ), Dongli Transmission (002164),
Founder Motor (002196), Xiangdian Electric Co., Ltd. (600416), Jiangte Motor (002176), Jinlong Electromechanical (300032),
New Peng Holdings (002328), Qiyuan Equipment (300140), Tellhow Technology (600590).
Extended information:
The rare earth permanent magnet ironless motor is a new type of special motor that represents the future development direction of the motor industry. It adopts ironless, brushless, non-magnetic damping, Rare earth permanent magnet power generation technology has changed the traditional motor's use of silicon steel sheets and wound stator structures. Combined with self-developed electronic intelligent frequency conversion technology, the efficiency of the motor system has been increased to more than 95%.
The rare earth permanent magnet iron-core motor is a major innovation and has achieved "three major" breakthroughs in technology:
First, compared with the traditional radial magnetic field structure design, it adopts The axial magnetic field structure design greatly improves the power density and torque to volume ratio.
The second is to use new winding technology, high-pressure precision die-casting and polymer materials to effectively reduce winding copper losses.
Third, silicon steel sheets are not used as stator and rotor core materials, which eliminates magnetic damping and iron loss, reduces driving power, and reduces iron loss and heat sources.
References:
Baidu Encyclopedia-Rare earth permanent magnet iron-core motor
Does an iron-core generator have reluctance after loading?
If you use 12 wire packages to make 3 outlet ports, it means 4 groups. Expressed in numbers, there are 4 groups, each group has 3 wire packages A (1.2.3.) B (1.2.3 )C(.1.2.3.)D(1.2.3.) Take out the outer wire ends of the three wire packages of 1.2.3. in group A to make three V.U.W ports (that is, the power output port), and connect the Connect the remaining thread end of the inner ring of the No. 1 wire package of Group B to the outer ring thread end of the No. 1 wire package of Group B. Then connect the remaining thread end of the inner ring of the No. 1 wire package of Group B to the outer ring thread end of the No. 1 package of Group C. C There is an inner ring wire left in package No. 1 of Group D and then connected to the outer circle wire of package No. 1 in Group D. The remaining inner ring wire is left alone (leaving the last remaining 1.2.3. threads connected together with one thread), so 1 The group lines are basically connected. Then wires No. 2 ABCD and No. 3 wire ABCD are connected in this way, and finally the remaining wire ends of all D wire packages are joined together. I drew a picture, but I can’t post it.
Yes, generally speaking, according to the law of conservation of energy, the resistance to rotation will inevitably increase when a load is applied. The simple explanation of the principle is: flowing through the coil The current will generate a magnetic field, which prevents the magnet from moving in the original direction. When the load changes, the current flowing through the coil changes, and the intensity of the generated magnetic field also changes accordingly.