Is the controller of electric vehicle 1500w and the motor of 1000w harmful to the motor?

A higher power controller can have a lower power motor, but a lower power controller cannot have a higher power motor. The reason is that the motor overload capability is stronger and the controller overload capability is weaker.

At the same time, when the high-power controller is equipped with a low-power motor, the electric vehicle should not start too fast or too slow. Don't accelerate too fast or too hard when going uphill or carrying people.

Controller related knowledge:

1. The functions of the controller include: controlling the rotating speed of the motor, controlling the work of electrical appliances such as lights, detecting and protecting the low voltage of the power supply for braking and power-off protection, etc.

2. The rated voltages of the controller, motor and battery should be as consistent as possible to give full play to their respective functions. The rated voltages of the controller and the battery are inconsistent, and the low-voltage detection and protection functions of the controller are lost.

At present, electric vehicles mainly include electric bicycles, electric motorcycles, electric tricycles, electric tricycles and electric wagons. Because of different models, the controller also has different performance and characteristics.

Under the same power, the more tubes, the stronger the performance and the lower the calorific value. However, if the power of a single tube is high, the combined 9-tube controller is better than the low-power 12 tube, which depends on the quality of the single tube.

Connection mode of the controller:

Step 1: Find out the positive and negative poles of the power supply and the electric door lock wire.

Put the multimeter in the DC position, then connect the negative black line of the multimeter to the negative electrode of the battery, and then use the positive red line of the multimeter to measure one by one. The positive electrode with voltage is slightly higher than the power supply voltage, and the negative electrode without voltage.

Step 2: Connect the power cord and the electric door lock cord.

Thick red is the positive pole of the controller power cord, and thick black is the negative pole. Turn on the key after switching on, then measure whether the power supply voltage and the voltage of the electric door lock wire are normal, and then measure the power supply voltage of the handlebar wire red and black line about 5V, and the power supply voltage of the hall wire red and black line about 5V respectively. Don't forget to set the multimeter to DC.

Step 3: Connect the voltage to the white learning line normally.

If reverse pull-out occurs during docking, please pull out the learning line after the motor rotates forward. Generally, the handle line can be connected according to the color. If the handle is broken, unplug the handle wire and directly connect the red wire and the green wire of the controller handle wire. The motor is running normally, which proves that there is something wrong with the rotating handle. Replace the rotary handle.

Step 4: How to determine the meaning of each line on the tram.

Find three phase lines and five Hall lines along the motor, remove the handle to find three handle lines, and remove the brake handle to find two brake lines. You can see the positive pole of "+"power supply and the negative pole of "-"power supply when disassembling the battery. Generally speaking, it is the easiest and most accurate to find and install according to the big parts.

Step 5: Test Hall's method.

Carry out live detection on the whole vehicle. First, connect all the lines and connectors, pull the multimeter to a DC voltage of 20V, first confirm that the controller has a power output of 5V, and then connect the black stylus to the ground wire of Hall, and the red stylus to the three signal wires respectively. When measuring, gently rotate the motor by hand. When Hall is normal, the multimeter will display the pulse voltage data of 0V-5V.

If there is no pulse voltage when measuring a Hall, the Hall is broken. This situation can also be detected by pointer multimeter. The pointer swings between 0 V and 5 V, and the hall is good. If the hands don't swing, the hall is broken. This method is the most reliable as long as it is operated by electricity.

Step 6: Connect the instrument line and find out the handle line.

When the instrument is disassembled, it will be found that the instrument has two wires, one connected to the anti-theft interface and the other connected to the instrument wire of the controller. When you remove the handle, you will find that there are only three lines in the handle, which can be found by looking at the color or measured by a multimeter.

Step 7: Connect the brake power cord.

When you remove the brake handle, you will find that the brake handle has two wires, which is a normally open switch. Connect these two wires directly to the controller and you can brake and cut off the power.

Step 8: Start self-study.

After the installation is completed, use the pedal to balance the whole vehicle, connect the controller and insert the learning line in the opposite direction, and then open the electric door lock. At this time, you will enter self-learning. When the motor rotates normally, if it is found that the motor runs in the opposite direction, you can change the motor running direction and then unplug the learning line.

References:

Baidu encyclopedia-electric vehicle controller