Motor faults are mostly Hall faults and internal mechanical faults of differential.

1, Hall detection.

Take out the multimeter, a common tool, and set it to 20v. Use a red pen to intervene in the positive wire of Hall, and use a black pen to intervene in Hall.

Yellow line, green line and blue line, then open the power lock and turn the motor wheel gently. If the voltage changes, the corresponding Hall is normal.

Yes, the general voltage range is 0-5v. On the other hand, if the voltage is unchanged, the corresponding Hall is faulty and needs to be replaced.

2. Remove the differential motor. Generally speaking, the motor and the differential are separate. If it is hexagonal wire, please use a sharp awl to clean up the dirt attached to the hexagonal cap.

Used for disassembly.

3. Put the removed parts in order and protect them with magnets to avoid attracting sundries and causing trouble.

4. To detect the damage corresponding to Hall, tap gently with a sharp awl. Please don't weld the hall for a long time, so as to avoid the hall being broken down by heat.

Damage! Then fix the Hall with 10 1 glue to prevent it from falling off, and fix the wire with the wire harness! Then install it, and the screws must be tightened when installing.

Tightly prevent the screw from falling off.

Second, the maintenance method

Maintenance skills of electric tricycle motor:

1, the motor of electric tricycle is proved to be good after passing the multimeter, and it is bad if it fails.

2. The motor of the electric tricycle has eight wires, namely black, red, yellow, green, blue, rhubarb, big green and big blue. Measure the black line of the motor with the red pen of the multimeter, and measure the resistance of the three lines between 645 and 755 with the black pen, which proves that the motor is ok.

3. The motor of electric tricycle is generally replaced with carbon brush. Before opening, pay attention to whether the friction between the changer and the carbon brush is imaginary. If yes, use sandpaper to rub the changer and carbon brush to keep the distance.

4. When turning on the motor of electric tricycle, be careful not to rub the motor wire package, so as not to damage the wire package, and don't stick the magnetic steel with iron east and west, so as not to break the magnetic steel.

5. Pay attention to the connection of Hall wire when replacing the motor of electric tricycle. If it's the first time, it's best to take down the wires and weld them one by one to avoid welding mistakes. After welding, glue it with 502 and then glue it with AB to avoid instability.

6. Change the magnetic steel, touch the magnetic steel, pay attention to clean the glue on the spindle and magnetic steel, put the glue in the opposite direction when absorbing the magnetic steel and magnetic steel, and then stick it.

The main power of electric tricycle comes from battery. The batteries of electric tricycles are mostly lead-acid batteries, so the battery life affects the driving distance of electric tricycles. Battery maintenance can start from the following six aspects.

1, correctly grasp the charging time. It is best to charge the battery once when the discharge depth is 60%-70%.

2. It is forbidden to store the power-off state, which means that the battery is not charged in time after use. When the battery is stored in a state of insufficient electricity, it is easy to be sulfated, and lead sulfate crystals attach to the electrode plate, blocking ion channels, resulting in insufficient charging and battery capacity decline. The longer the battery is idle, the more serious the battery damage is. Therefore, when the battery is idle, charging it once a month can better keep the battery healthy.

3. Avoid large current discharge. When the electric car starts, carries people and goes uphill, please use the pedal to assist and try to avoid instantaneous heavy current discharge. High current discharge easily leads to crystallization of lead sulfate and damages the physical properties of battery plates.

4. Prevent the internal pressure of the battery from rising due to excessive exposure temperature, which will force the battery pressure limiting valve to open automatically. The direct consequence is to increase the water loss of the battery. Too much water loss of the battery will inevitably lead to the decline of battery activity, accelerate the softening of the electrode sheet, and cause fatal injuries such as fever, bulging and shell deformation during charging.

5. Avoid plug heating when charging. The phenomenon of loose charger output plug and oxidation of contact surface will lead to heating of charging plug. If the heating time is too long, the charging plug will be short-circuited, which will directly damage the charger and bring unnecessary losses. Therefore, when the above situation is found, the oxide should be removed in time or the connector should be replaced.

6. Regularly check that if the continuous mileage of the electric vehicle suddenly drops by more than ten kilometers in a short period of time during use, it is very likely that at least one battery in the battery pack has a short circuit phenomenon such as grid fracture, plate softening, and plate active material falling off. At this time, you should go to a professional battery maintenance organization for inspection, maintenance or selection in time. This can relatively extend the life of the battery pack and save money to the greatest extent.