How to test the motors of the rising new energy vehicle market?

The heart of electric vehicles - the electric motor, which provides the power source for cars. New energy vehicles have become a very promising vehicle today, and through this surgery, there will be disruptive changes.

The following is the entire energy operation unit for testing motors in pure electric vehicles. The charging process at rest: energy is transmitted unidirectionally through the power grid, DC bus, and battery; In motion, energy is transmitted in both directions from the battery, DC bus, to the load motor.

At this time, the electrical energy from the DC bus battery is released to provide power to the load, and when there is electrical energy feedback, it will be transmitted to the grid through the DC bus, making more efficient use of energy. Now let the editor from the new energy vehicle motor manufacturer talk to you about the energy structure of pure electric vehicles, which can be divided into four parts:

1. Battery charging system: The battery charging system converts AC power from external charging stations, charging stations, and other charging devices into DC power to charge the batteries in pure electric vehicles and store electrical energy in the batteries.

2. Motor drive system: The motor drive system is the core part of electric vehicles, which converts the DC bus voltage output by the battery into AC power and drives the motor to operate using AC power.

3. DC voltage stabilization system: Due to frequent charging and discharging, the voltage at both ends of the battery is a voltage that fluctuates within a certain range. It is necessary to stabilize the voltage within this range at a stable DC bus voltage for direct application or other voltage conversions.

4. DC load power supply system: The main function of the DC load power supply system is to convert the stable high voltage output of the DC bus from the battery in the electric vehicle into low voltage output, providing power for the low-voltage DC load in the vehicle.

The comprehensive testing of the motor stator and the entire motor, which is the heart of new energy vehicles, has become particularly important. This directly affects the operating status of the vehicle, and only the motor that meets the relevant functional project testing can be competent for such a distance task. For the motor test bench, we usually need to complete T-N curve, no-load test, locked rotor test, efficiency cloud map, regenerative energy feedback test motor test, electric high working speed test, electric overspeed test, temperature rise test, etc. The following figure shows the test results of the efficiency cloud map, which can find the working condition matching when the efficiency z is high, facilitating the acquisition of the efficiency characteristics of the motor under any working condition, and assisting users in designing z-optimal motor control algorithms.

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