This configuration should also work with 10 magnet motors. By the way weight is empty armature weight? I used marine white gell coat and it works real well, it gives a super strong almost stone like surface very smooth and do not get any shorts. One or both sets of magnets are , made of a of wire wound around an iron core. Hugh hi Shahid a Dar, When you state that you put 36kg on the pulley is this a braking load? You need to understand the need for storage in the system if you are not connecting this to the grid. But you do not state what windspeed this is at. I have built several where the coils spin within a field and commutators pick up the power.
And sir that orignaly rewinding is 4 pole. On our motors the turn count determines the Kv and we generally use the largest size of wire that will fit on the stator arms. Because i will drive this alternator with bicycle because electricity issue and i can not charge my battery. If you give each magnet two gaps to work with on its own then the flux will be weak. The motor characteristics are measured as a complete running motor. I want to covert in 12kw 3phase 380v 50hz frequency.
The elimination of the sliding contact allows brushless motors to have less friction and longer life; their working life is only limited by the lifetime of their. Winding diagram is the same ref. The windings can't be changed from that point. Tutorial brushless motor rewinding based on a br1103b fishpepperde during motor operation the axis of the rotor shown on the left is held in place by a cclip lock screw or a similar fastener the stator is made of thin. Hugh Sir, Please may I know the best type and shape of Magnet to use with a Triangular Coil or say Trapezoidal? It is the ratio between the speed of the wind and the free windspeed around.
It retains its high performance while the efficiency and power of an equivalent conventional motor declines due to wear, causing poor brush contact, arcing between the brushes and the commutator dissipating energy, and dirt compromising electrical conductivity. The actual efficiency of your motor must be graphed to see how good it is. I noticed I had about. I can not seem to find clear answers on how many magnets, what size magnets, how many coils of which size wire, how many turns on each coil and how the coils should be wired together. But I am sorry the equation you have above is not going to help you arrive at the tip speed ratio.
Regards Hi If you have volts but no amps this usually means a high resistance. You have way more magnets than you would need for this project at this power and rpm. Have fun Hugh Hugh, I have bookmarked your book page just in case. Watch out for high thrust loads on the bearings. Skewed results come from a prop that runs too close to no load values. The motor characteristics are measured as a complete running motor.
This is because the example is the 1200 turbine which has only one magnets rotor single sided. If you give the magnet two air gaps to work with one on each side for example then it will not be able to fill them both as well as one. I am now working to make a permanent magnet generator with a 8 inch diameter rotor and 9 inch diameter stator. This technique is more efficient at high speeds than the sinusoidal method and gives better performance during dynamic load changes compared to all other techniques. Steel is what you need for magnetic flux. I don't know if that will work for your motor or not, it is an outrunner? But it needs to be well cooled by the wind to work like this.
You can also email me. You do not have a choice of speed. If you want to get the best out of your small disk then use many magnets and even trapezoidal ones and cram them in tightly. But I will say that you cannot get 12 kW at 750 rpm from a motor that is designed to work at 1400 rpm. The device also features synchronous rectification, a technique borrowed from switching voltage regulators to lower power consumption and eliminate the need for external Schottky diodes. I use connection all in clockwise, finish of coil 1 to start of coil 2. I have even replaced the amp meter.
I suggest you connect the coils in 4 separate star groups to rectifier like my 12 volt designs. A typical controller contains 3 bi-directional outputs i. They did that trick by using a lot of very big magnets, but the wooden design did not use them to their full potential. Do you have any excel file for me? Have fun and let us know how it works. I want to know the design procedure for it.
You could also do 25-50-25 if you're in the mood You could try some of the checks shorts! If so then I think that at 9rpm this would be 200 watts mechanical power. . Hi Rajeev, You need to look at the rotor diameter and figure out the coil spacings and hence the cross-sectional area available for wire and hence the wire size from there. The result is a much smoother power delivery compared with the trapezoidal technique. If you want to get the best out of your small disk then use many magnets and even trapezoidal ones and cram them in tightly. Finish of coil 1 is connected to finish of coil 2, start of coil 2 to start of coil 3 etc. You may have already seen my Instructable on how to wind a brushless outrunner motor and became frustrated because it didn't work on your 12 tooth motor.
Tutorial brushless motor rewinding based on a br1103b fishpepperde that way it is harder to make mistakes trust me you really want all your windings to have the very exact number of turns. Should I used slot number 1 to 4 7 to 10 plzz sir tell me this is correct or rong. I will be glad to being answered by you. Needle winding speed for wire size 0. The controller provides of current to the motor that control the and of the motor. This device is designed for battery-powered products. It depends on your goals.