Motor control on STM32
Preface A current sensing resistor (shunt resistor) is usually placed on one of the three-phase lines. The voltage drop across this resistor can be amplified by an operational amplifier (op-amp), and then received by a sensor and converted into a digital signal. In this way, we can detect the current of the motor in the […]
Shunt resistor based current sensing design Read More »
Preface When using the ST FOC motor control library with Hall signals as the position feedback, synchronous electrical angle data must be input based on the characteristics of the motor being used. This data synchronizes the electrical angle with the Hall signal at each signal change. If the angle deviation is large, it may affect
ST Motor Control Adjust Method-1 Read More »
Preface In MC SDK 5.x, there are two control loops, the current loop and the speed (torque) loop. Some applications require the use of a position loop, such as motor control for UAV gimbal or subway gates. This article will explain how to add a simple position loop on top of the existing ST motor
Add Position Controll on MC SDK 5.x Read More »
Preface The previous post described the main program structure generated by the STM32 Motor Control Workbench. Here we will continue to explain the three core task flows and structures that depend on the main structure, which are mainly divided into three parts: safety tasks, medium frequency tasks, and high frequency tasks. The safety task mainly
MCSDK Software Architecture-2 Read More »
Preface Here, there are many online resources available for reference, such as the video tutorials on FOC control principles and motor application development based on STM32. This discussion focuses on the code generated by ST’s Workbench after setting up the parameters, mainly on the program architecture and important code explanations. After understanding the architecture, users
MCSDK Software Architecture Read More »
Preface On the ST side, Motor Profiler and MotorControl Workbench are introduced to facilitate the complete construction of the underlying program and provide basic APIs for applications. They are relatively easy to use for beginners and have the advantage of having all their code fully open for viewing, including the writing methods of each API.
Motor Profiler and MotorControl Workbench Read More »
Preface After discussing all the mathematical transformations, we come to the final step of FOC control. First, let’s take a look at the Three Phase Inverter shown in the diagram below, which is generally included in the motor driver. The green box typically represents the MCU control calculation. The final complete FOC algorithm The physical
Theory For Field Oriented Control -4 Read More »
Preface In the previous section, we discussed the decomposition of feedback signals. In this section, we will delve into the introduction of input signals. PWM to SPWM We need to drive a three-phase inverter circuit, and if we use only switching, we will get a control signal similar to a 6-step square wave, which is
Theory For Field Oriented Control -3 Read More »
Preface In the previous chapter, we introduced the types of motors and briefly described their control methods. In this chapter, we will delve into the mathematical model and FOC control method in depth Control state Here you can refer to the dynamic diagram of the left image, where it can be seen that different current
Theory For Field Oriented Control -2 Read More »
Preface We will be discussing the ‘Y-type winding brushless DC motor’, and will explain the motor type, principle of rotation, control methods, theoretical control, and step-by-step implementation. are shown in the following figure. Principle of Motor Rotation The two circular magnets in the figure below will rotate due to the rotation of the upper magnet,
Theory For Field Oriented Control -1 Read More »
