MCU reference model tailored for high-performance range hoods
In recent years, with the improvement of the living standards of domestic residents, the requirements for a clean kitchen environment are also increasing. When consumers start to buy range hoods and walk into home appliance stores, they see a wide variety of range hoods that are difficult to choose. Most of the range hoods on the market currently have large air volume and strong suction as their main advantages, because these range hoods can make the kitchen cleaner and are deeply favored by consumers. In response to market demand, Toshiba has developed a variable frequency drive solution using a brushless DC motor, which can enable the range hood to achieve the functions of strong suction, large air volume, and high static pressure, bringing consumers a high-quality experience.
Inverter Range Hood MCU Reference Model
Frequency conversion range hood MCU system block diagram
constitute
This reference design uses Toshiba's motor drive dedicated microcontroller TMPM375FSDMG and intelligent power module (IPD) TPD4123AK for motor control. This solution uses vector control algorithm to achieve sensorless variable frequency motor control, and uses an Arm ® Cortex ® -M3 core MCU with Toshiba's unique vector engine to achieve precise control of the range hood. The hardware structure is simple and reliable, and the software uses a vector engine to implement vector operations, which is high-speed, reliable, and has a simple program structure.
Features
Protection function: hardware overcurrent/overvoltage/undervoltage protection
PWM/control frequency: 15.625kHz
Speed range: 300-1600RPM
Starting current: 0.4A
FG output : output 3 pulses per electrical cycle
V SP input: Motor is controlled by V SP (ADC)
advantage
1. Single resistor current sampling, high reliability;
2. Wide speed adjustment (300~1600RPM or more) (maximum air volume is more than 20m3 per minute , maximum static pressure is more than 600Pa);
3. The air volume and air pressure curve are easy to adjust;
4. Easy switching between constant torque and constant speed modes (switching between the same speed or different speed gears);
5. It is also easy to debug new motors.
Compared with the AC motor solution, the range hood variable frequency solution can achieve a larger air volume, a higher static pressure, and a more flexible speed regulation range, and can also achieve stepless speed regulation within a certain range.
The variable frequency drive solution of this brushless DC motor enables the range hood to achieve excellent functions, reflecting Toshiba's deep insight into the market. With its strong technical strength and pioneering spirit, Toshiba has been cultivating the field of integrated circuits, making continuous breakthroughs and innovations in technology, and continuously launching products with stronger performance, higher cost performance and more efficient technology, making outstanding contributions to users' high-quality life.
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