To meet the demands of bidirectional motor control in fresh air systems, Geehy introduces the APM32F411 fresh air system solution. It utilizes a sensorless FOC (Field-Oriented Control) algorithm and dual-resistance sampling to control both intake and exhaust fans.

Features of the APM32F411 Fresh Air System Solution

▪  Employs a sensorless FOC algorithm for low torque fluctuations, high efficiency, low noise, and rapid fan response.

▪  Operates from 15V to 26V and supports high-voltage control (AC/DC) with motor speeds up to 10,000 RPM.

▪  Features a closed-loop start-up using back electromotive force for smooth and responsive motor operation.

▪  Supports fan under-voltage, over-voltage, stall, overspeed, overcurrent protection, and bidirectional control.

▪  Supports common industrial control inputs like UART, CAN, and potentiometers.

▪  Additionally, Geehy's dual-motor control solution supports sensored control. Its high-precision ADCs ensure real-time accurate sampling of sensored Hall and encoder signals, enabling precise motor position and speed control. It finds ▪  applications in various fields such as balancing scooters, gates, electric vehicles, washing machines, injection molding machines, lifting equipment, printing equipment, robots, and unmanned transport vehicles.

Advantages of the APM32F411 Fresh Air System Solution

▪  Based on the Arm® Cortex®-M4F core with up to 120MHz frequency for efficient FOC algorithm processing.

▪  Ample memory (512KB Flash, 128KB SRAM) for data processing, storage, and OTA updates.

▪  Two advanced timers with 7 channels of PWM output for dead time and brake input.

▪  Two 12-bit ADCs with a total of 16 external channels for real-time fan control sampling.

▪  Integrated comparator and external amplifier for reliable current control and system protection.

▪  High-precision communication with a +/- 1.5% internal oscillator under full temperature and voltage conditions.

▪  Multiple interfaces (including CAN, QSPI, SDIO, USB) for expanded connectivity options.

▪  Proven sensorless FOC algorithm for enhanced performance.