Lawnmower controller scheme based on ST SP32G4+STL130N6F7

Lawn has risen to a necessary consumer product for Europeans and Americans, and lawn mowing has become a necessity for many European and American families, with 2~3 times a month during the peak season. As far as the common people seem, mowing is simple, but in fact the process is tedious, cutting a few hours and spending hundreds of dollars.

Data show that the global lawn mower market size of $30.4 billion in 2021, and grow at a compound annual growth rate of 5.7%. Among them, North America has the largest lawn area, so the customer unit price is also the highest. According to conservative statistics: the total lawn area in North America is about 190~240 million acres, in order to take care of it, Americans alone have to buy nearly 8 million mowers of various types every year, and the expenditure for this project alone is up to 9 billion USD.

STSPIN32G4 is an integrated DCDC, LDO, motor pre-drive (1A drive capability) Soc, the core is a main frequency 170Mhz with DSP function of wide temperature MCU, while with CAN, LIN, interface, and a wealth of analog peripherals to help designers choose the most suitable drive mode and reduce the PCB area and the overall bill of materials. The official open-source firmware library provides a complete development program that can quickly and easily complete the algorithm of FOC, BLDC, while having sensorless, hall, abz interface to meet the needs of different applications.

►Scene application diagram

►Display board photo

►Program Block Diagram

►Core technology advantage

STSPIN32G4

1. Integrated three-phase half-bridge driver, DCDC, LDO, OPA, high main frequency, small size, with hardware division, trigonometric algorithm function, low cost, support Sensor, hall, abz three sensing detection;

2. Standby power consumption is very low, less than 15uA, in standby mode;

3. Working temperature: -40 ° -125 °, can be suitable for more application scenarios

4. Complete hardware and software design information, especially the ST visual open source graphical development interface to meet the FOC control needs, ABZ interface input

5. Can be through the STMCWORKBENCH online debugging motor control-related parameters (such as PID, etc.)

6. Can set multiple groups of parameters to meet product specifications need

►Specifications

1. Input voltage : DC 5.5V-75V (type :20V)

2. Maximum output power : 100W

3. Maximum output current : 2A @ DC20V

4. PWM frequency : 30 kHz

5. Motor feedback : sensorless

6. Sensing accuracy : 0.1°

7. Control mode : FOC