FOC industry overview, what is the technology?

FOC, also known as vector frequency conversion, can accurately control the size and direction of the magnetic field, making the motor torque stable, low noise, and high efficiency. In recent years, the development of FOC motor has been constantly promoted and widely used in many fields; FOC requires complex mathematical algorithms. The chip writes relevant code to implement it. Next, I will introduce it to you.

1、 FOC Industry Overview

1. A large number of motor control applications have been constantly seeking ways to improve efficiency and reduce system costs. Therefore, FOC (Field Oriented Control) has attracted much attention in the motion control industry. Now it has gradually replaced traditional control methods in many applications. At present, FOC technology has been perfectly matched with BLDC motor. With the acceleration of MCU localization, non inductive FOC will gradually become popular.

2. FOC is also known as vector frequency conversion. It can accurately control the size and direction of magnetic field, so that the motor torque is stable, noise is low, efficiency is high, and it has high-speed dynamic response. Therefore, in recent years, FOC is widely welcomed in the market in low cost, brushless motor applications. At present, FOC has gradually replaced the traditional control mode in many applications, and is favored in the motion control industry. For a long time, motor control has not been the focus of electronic engineers, and many developers are unable to easily design necessary control circuits due to lack of experience or professional knowledge.

3. However, although electronic control has long been the weakness of Chinese electronic engineers, Chinese enterprises are not immersed in the research and development of traditional AC motors due to control technology difficulties. In recent years, the research and development of FOC motors has been constantly promoted. Air conditioners, drones, robots, medical equipment, CNC machine tools and other fields have been widely used in FOC technology. The market penetration of FOC motors has increased year by year.

2、 FOC technology

1. FOC requires complex mathematical algorithms, which may not be familiar to ordinary designers. In the past, designers usually relied on complex digital signal processing (DSP) chips to achieve sensorless FOC.

2. Moreover, as far as FOC technology is concerned, although many chip manufacturers have developed chips dedicated to motor control, and also used their chips to implement related algorithms for FOC motor control, their FOC motor control algorithms are not completely open source, but only provide a functional API for users to use.

3. There are also some domestic chip manufacturers that integrate FOC control related modules in the chip by using hardware. Users only need to configure some related registers to use FOC algorithm to control the motor. It is also true that the above methods have been applied to the corresponding projects.

4. At present, there is no manufacturer that can truly achieve the open-source FOC algorithm in the market. The vast majority of engineers do not understand the FOC motor control algorithm, nor can they independently write relevant code, but only limited to minor repairs to the original non core code to complete the project development.