release time：2024/06/07
As a convenient and fast means of transportation, cars have long been closely related to people's daily lives. The rapid development of the automobile industry has also driven the development of related supporting industries, and the automotive motor industry is one of them. A large number of motors are installed inside modern cars, ranging from dozens to hundreds. In addition to being the core components of automobile drive, motors are also used in automobile air conditioners, wipers, electric doors, airbags, electric seats and rearview mirror adjustment systems. Automobile air conditioners are one of the more important supporting products for automobiles. The performance of air conditioners directly affects the comfort of passengers during the ride, so the performance and driving technology of automobile air conditioner motors are required to be high.
At present, the development trend of automobiles is safer, smarter and more energy-efficient. As an important component of automobiles, automotive motors have the same development trend as automobiles, and also have some development characteristics of their own.
The safety of automobiles is achieved by collecting corresponding information through various sensor modules, and the ECU analyzes and makes decisions on the collected information, and then sends the decision results to the actuator for execution. Automotive motors are an actuator that can perform operations such as steering and braking to ensure safety.
Safety has always been the first requirement for automobiles, and automotive motors are also very important in terms of automobile safety. For example, before the emergence of automatic braking systems, once drivers drive fatigued, it is easy to rear-end the car in front and cause traffic accidents, and even cause car damage and death. The current measure is to sense the road conditions ahead through cameras and radars. Once there is an obstacle in front and the distance is close, the automatic braking system will work. The actuator of the automatic braking system is a brushless DC motor, which pushes the brake lever through a transmission mechanism to perform braking operations. In the braking operation of the automotive motor and the driver's braking, as long as there is one action, safe braking can be ensured.
From another dimension, automotive motors and their electronic control units (ECUs) are also different from conventional motors and their drivers in terms of safety requirements, especially automotive motors related to safety. The multi-phase motor on the car is designed with redundancy to ensure that the basic functions of the motor can be guaranteed when some phases fail.
The development trend of automotive motors is the intelligence of each node. This intelligence mainly refers to the intelligence with parameter identification and self-diagnosis. For example, the automotive motor ECU calculates the winding resistance from the current and voltage signals through the motor model algorithm, and then calculates the temperature rise of the motor through the resistance model of the winding. In this way, the working state of the motor can be dynamically monitored. Once overheating is found, corresponding actions are taken to prevent excessive temperature rise, and the state is reported to the relevant ECU. Many motor algorithms are sensitive to motor parameters. Differences in current size, ambient temperature and motor manufacturing process will cause deviations in motor parameters. If each point is calibrated, the workload is relatively large. The current trend is to use intelligent algorithms to identify and automatically calibrate motor parameters online. These are all manifestations of the intelligence of automotive motors.
Energy-saving brought by automobile electrification
Energy-saving brought by improved motor efficiency
Energy-saving brought by optimized motor control algorithm
With the advancement of motor manufacturing technology, the trend of automotive motors is integration (motor controller and motor are integrated together). The advantage of integration is compact size, easy installation, and can optimize system design.
At present, most automotive motors are still brushed DC motors. The advantages of brushed DC motors are simple control and low cost, but the disadvantages are easy wear of brushes, poor electromagnetic compatibility, and low efficiency. Therefore, brushless automotive motors are the trend of the future. At present, automotive electronic water pumps have basically realized brushless design, and cooling fans are still in the initial stage. At present, automotive motors on cars are both brushed and brushless, but brushless is already the mainstream.
With technological breakthroughs, DC brushless motors have gradually been used in the manufacture of various automotive motors in recent years.
Advantages of automotive DC brushless motors
Compared with traditional DC brushed motors, the application of DC brushless motors in automotive motors has the following advantages.
From an energy perspective, DC brushless motors can more efficiently convert electrical energy into mechanical energy, thereby reducing energy consumption and emissions.
From a structural perspective, DC brushless motors have no carbon brushes, do not generate friction and sparks, and reduce the need for failures and maintenance.
In addition, DC brushless motors have faster response speeds and can be adjusted more accurately according to engine temperature changes, providing more precise cooling effects.
DC brushless motors use permanent magnets and sensors to accurately control current and speed through electronic controllers. This design reduces friction and wear and improves the life and reliability of the motor.
Ningbo Nide Mechanical Equipment Co., Ltd., was established in 2010, committing to provide customers with highly automated, intelligent, and flexible motor manufacturing solutions, and focusing on the production line of stator, rotor and final assembly of various motors.
We provide customers with a variety of brushless motor manufacturing solutions, including BLDC needle winding machines, inner stator slot paper insertion machines, BLDC motor assembly lines, brushless stator and rotor production machines, etc., which are mainly used in automotive air conditioners, wipers, electric doors, airbags, electric seats and rearview mirror adjustment systems, etc. We can also customize complete brushless motor manufacturing solutions according to customer needs. If you need, please feel free to contact us.
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