Our multi-motor FOC solution integrates four FOC brushless motor channels together with a flight control algorithm, making it the industry's only single-chip solution of its kind. The evaluation board can be used as an AI learning board, and the solution also serves drones, industrial robots and IoT multi-motor applications.
Solution Overview
The i.MX RT105X is the main controller: on one side it provides 4 sets of PWM and ADC to drive four brushless motors, and on the other side it measures the drone's flight attitude through IMU sensors and a barometer.
Recommended MCU
- i.MX RT series: i.MX RT1052: Arm® Cortex®-M7@600MHz, 512KB RAM, MAPBGA196, 10mm×10mm; 8/16bit external memory controller interface (SEMC) for external SDRAM, Nor Flash and SRAM; dual-channel QSPI interface for external NOR Flash; 2 × USB-OTG interfaces; security: true random number generator (TRNG), AES-128 engine, bus encryption engine; 2 × 12-bit ADC and 4 analog comparators; quadrature decoder and FlexPWM modules; drives up to 4 sensorless FOC channels simultaneously
Core Components
- MCU: i.MX RT1052 (NXP)
- Power module: MPS/onsemi, full part number available on request
- DCDC: MPS, full part number available on request
- NOR Flash: ISSI, full part number available on request
Key Features
- High agility
- Single-chip "4 FOC + flight control" solution with high-speed control bandwidth
- Energy efficient
- 5%~20% more power-efficient than square-wave ESCs
- Fast acceleration and deceleration
- More than twice as fast in acceleration and deceleration as square-wave ESCs
- Sinusoidal current, with no current noise from start-up all the way to top speed
- Reliable start-up
- Zero-speed start-up, with over 3,000 consecutive reliable instant starts from standstill to top speed
- Stable high speed
- Over 5% higher speed than typical square-wave ESCs
- Propeller self-adaptation
- Automatically adapts to any propeller, with no parameter tuning required
- Automatic compensation
- Automatically compensates for motor parameter drift while running
Applications
Drones, industrial sewing machines, beauty therapy devices, massage and health care equipment
Reference Design ESC-10A-RT
- Production-grade design balancing high power and EMC
- Complete BOM, ready for direct mass production
- Integrated driver chip for a compact footprint
- 7V-12V/16A at system level (customizable on request)
- Built on the AMetal-FOC motor library, agile and efficient
- Built on the AMetal-Soar flight control library, flexible and stable
Functional Block Diagram
