There are also many winding methods when winding the motor. The most basic thing is to remember to replace the original single wire on the motor with double wire, because the thicker metal wire will have more power because of the large current throughput. Introduction of four-wheel drive motor winding: A, B and C are the three contact points of the motor. Mini four-wheel drive uses motor as power source, and a suitable motor will make your four-wheel drive run more smoothly. Before modifying the motor winding, we need to understand the basic principle of the motor. Induced voltage equation of moving wire in magnetic field (no load) Induced voltage on wire (E) = wire speed (v) x flux density vector (B) x length of wire in magnetic field (L). E = v x B x l When the motor runs to a stable speed, the value of (e) rises to equal to the external voltage (v) and the current approaches zero. At this time, the velocity equation is equal to: wire speed (v) = applied voltage (V)/ (magnetic flux density vector (B) x wire length in magnetic field (L)). V = V/(B×L) Therefore, the linear velocity (V) is inversely proportional to the line length (L) when the applied voltage is constant. That is, the shorter the wire, the faster the speed. But it should not be too short, otherwise the starting current will be too large and the motor will not move. Motor winding method 1 (single wire and single winding): A, B and C are the three contacts of the motor. The following is the most basic winding method for general motors: first, make one end of the enameled wire at 90 degrees, remove the insulating paint at the 90-degree end with frosted paper or file, then hang it on contact A, and then weld it after winding is completed. Wind the enameled wire around the right root of pole A and start winding counterclockwise. Refer to the winding diagram and circle the complete parts in turn. Next, put the enameled wire on the hook of the B contact, and continue the previous way to complete all the turns around the B magnetic pole. The hook of C contact and the winding method of C magnetic pole are the same. Remember that the paint that the enameled wire contacts with each hook must be scraped clean to ensure normal contact. Finally, the enameled wire is wound back to the starting point, and the A hook is hung with the original thread end to complete the winding action. Contact welding, single wire and single winding method is completed here. Simple type: single wire single winding type, hanging (A)→ winding (A)→ hanging (B)→ hanging (B)→ winding (C)→ hanging (a). Motor winding mode 2 (single wire and double winding): This is an improved winding mode, which aims at increasing the cross-sectional area of power transmission and reducing the length of the coil to obtain greater rotation speed. ※. The main winding method is the same as single wire and single winding, except that all turns are divided into two sections. Refer to the winding diagram. First, use a wire to wind half a turn (as shown in the icon 1→7), pass through the three hooks A, B and C, wind the three magnetic poles A, B and C, then return to the hook A at the origin, and then wind the other half turn in the same way (as shown in the icon A→G). After all winding is completed, there should be two enameled wires on each hook at this time (point A has ***3 because of the head-tail relationship). Then use the previous method to weld the joint. This is the end of the single wire double winding method. Simple type: single wire double winding, hanging (A)→ winding (a) inner ring → hanging (B)→ winding (b) inner ring → hanging (C)→ winding (c) inner ring → hanging (A)→ winding (a) outer ring → hanging (B)→ winding (b) outer ring. Motor winding method 3 (double-wire single winding): double-wire single winding is actually the same as single-wire double winding in meaning. ※. The double-wire single winding method, like the single-wire single winding method, is to wind all the coils of the magnetic pole at one time, and the only difference is that the double wires are wound at one time. Refer to winding diagram. The same number and different colors represent two enameled wires. First, fold the enameled wire in half, scrape off the paint, hook the hook of contact A, and start winding according to the single wire and single winding procedure. After all winding is completed, there should be two enameled wires on each hook at this time (point A is ***4 because of the head-to-tail relationship). Weld the joint in the same way as before. The double-wire single winding method ends here. Simple type: double-wire single winding type, hanging (A)→ winding (A)→ hanging (B)→ hanging (C)→ winding (C)→ hanging (a). Motor winding method 4 (single wire rewinding): This is the most complicated of the four winding methods listed. ※. In principle, the conductor is enlarged on the surface of the magnetic field, so in each power-on circuit, the conductors of two of the three magnetic poles of the rotor flow with current at the same time (other winding methods are that only one magnetic pole flows with current at a time). The winding method is to wind two magnetic poles at the same time, and then hook. Fold the end of the enameled wire into a V-shape (leave about 2 cm at the end of the wire) and hook the A hook (note! Only temporary hook, no welding), start winding the coil of pole A 1→7 in the figure, hook B, and then come back to continue winding the coil marked with another color in A → F. After winding the A pole, the B pole winding 1→7 coil is directly entered without hook B.. In this way, all the coils of the B pole and the C pole are completed. Take off the original threaded end at a, tighten it with the threaded end, weld and cut off the redundant part. After all winding is completed, only one enameled wire should be hung on each hook (the same is true for point A). Weld the joint in the same way as before. This is the end of the single-line rewinding method. Simple type: single-wire rewinding type, (A)7 turns → hook (B)→(A) 7 turns →(B)7 turns → hook (C)→(B) 7 turns →(C)7 turns → hook (A)→(C) 7 turns → welding front and rear ends. Summary of motor winding mode: Four basic winding modes are introduced above, and the number of turns in the legend is for reference only. ※. The actual number of turns varies according to the diameter of enameled wire. As for the number of turns used for various wire diameters, it depends on experience. The principle is that the longer the wire, the greater the torque and the slower the speed. On the contrary, the shorter the wire, the smaller the torque and the faster the speed.