Detailed explanation of electric vehicle motor controller based on TL494 chip
Electric bicycles are generally powered by lead-acid batteries. They are available in 24V, 36V and 48V specifications, but the electric vehicle's lighting, audio, burglar alarm, mileage speed display, motor controller generally only needs 12V DC voltage, the article introduces one The step-down DC-DC switching power supply based on the chip TL494PWM technology stabilizes the output voltage through closed-loop control, and the system has over-current protection and phase compensation design to make the system work stably.
Electric bicycles are generally powered by lead-acid batteries. They are available in 24V, 36V and 48V specifications, but electric vehicle lighting, audio, burglar alarms, mileage speed display, motor controllers generally only need 12V DC voltage.
The electric vehicle controller is the core control device used to control the start, run, advance and retreat, speed, stop and other electronic devices of the electric vehicle. It is like the brain of an electric vehicle and an important part of an electric vehicle. Electric vehicles currently include electric bicycles, electric two-wheeled motorcycles, electric tricycles, electric three-wheeled motorcycles, electric four-wheeled vehicles, battery vehicles, etc. Electric vehicle controllers also have different performance and characteristics due to different models. .
In the face of exhaust pollution and exhaustion of diesel locomotives, electric vehicles are now gradually entering people's lives. The world's major automobile manufacturers are vigorously developing electric vehicle control technology, and have launched electric vehicles at the recent auto show. The motor controller is the most critical part of the electric vehicle control system, and its development has a profound impact on the popularity and promotion of electric vehicles. The mainstream electric vehicle controller is now mainly composed of power electronics, in which the motor controller directly acts as the heart.
The principle of electric motor controller
In this paper, the electric vehicle adopts the excitation DC brush motor, and the power battery adopts 6-section lead-acid batteries in series. The rated voltage of each battery is 6V, and the total rated output voltage is 36V. The rated voltage of the shunt DC motor is 36V, the rated power is 3kW, the output rated torque is 10.84Nm, the rated speed is 2600r/min, the excitation current is 10A, and the maximum load current is 110A.
