How to connect a battery for an electric vehicle with four motors inside wheels in simulink?

Hello, I am building a model for electric vehicle with four motors. Each wheel has a single motor in its hub. I have a question regarding the battery connection. In the normal case like the HEV (hybrid or electric vehicle) ,only one motor is connected to the battery..but in my case I need to connect the four motors to the battery. I connected one motor directly to the battery and then took some branches from the same connection points and connected to the other three motors.my question is : will simulink understand that other three motors are loads too that affect the drawn current from the battery ? and if not, How should I connect them to the battery properly ?

Answer 1

[Aishwarya Shukla]

Hi @Mohamed Abdullah

In Simulink, if you connect multiple motors to the same battery, Simulink will understand that all the motors are loads that affect the drawn current from the battery. When you connect the motors in parallel, the total current drawn from the battery will be the sum of the currents drawn by each motor.

1. In your case, connecting one motor directly to the battery and then taking branches from the same connection points and connecting to the other three motors is a valid approach. Simulink will correctly model the four motors as loads on the battery.
2. However, it is important to ensure that the battery can supply the total current required by all four motors simultaneously. If the total current drawn by the motors exceeds the battery's capacity, the voltage may drop, causing the motors to operate at a lower voltage and potentially affecting their performance.
3. Additionally, you should consider the impact of the wiring resistance between the battery and each motor. The wiring resistance can cause a voltage drop, which may also affect the performance of the motors. To mitigate this, you can use thicker wires with lower resistance or minimize the length of the wiring between the battery and each motor.

In summary, Simulink will understand that all the motors are loads that affect the drawn current from the battery, and connecting the motors in parallel as you described is a valid approach. However, you should ensure that the battery can supply the total current required by all four motors simultaneously and consider the impact of wiring resistance.