The boards may also be utilized in any battery-operated purposes that utilise brushless 3-phase motors with single-shunt management
Aiding the event of state-of-the-art cordless house and backyard energy instruments, two new plug-and-play boards have been launched for controlling 3-phase brushless motors powered by as much as 56V Li-ion batteries.
Based mostly on STSPIN32 motor-control Methods-in-Bundle, the STEVAL-PTOOL1V1 and STEVAL-PTOOL2V1 analysis boards fulfil key necessities of energy instruments together with small dimensions and low standby present. Firmware is provided for six-step motor commutation utilizing Corridor-effect rotor-position sensing, which ensures low torque ripple and optimum energy effectivity.
The STEVAL-PTOOL1V1 for tools powered by Li-ion battery packs from two cells (7.4V) to 6 cells (22.2V) has a 70mm x 30mm footprint and delivers as much as 15A steady present. Standby present is lower than 1µA. On the coronary heart of the board is the STSPIN32F0B motor controller, which accommodates:
- STM32F0 microcontroller
- 3-phase half-bridge gate driver
- 12V and three.3V voltage regulators
- op-amp for present sensing
- power-stage safety options corresponding to programmable over-current safety (OCP), cross-conduction prevention and under-voltage lockout (UVLO).
The STEVAL-PTOOL1V1 energy stage options the ST Energy MOSFET N-channel 60V STripFET F7 expertise.
The STEVAL-PTOOL2V1, for battery sizes from eight cells (29.6V) to 15 cells (55.5V), can ship as much as 19A steady present. It’s managed by STSPIN32F0252 motor controller, which accommodates:
- 3-phase 250V gate driver
- STM32F0 microcontroller
- comparator designed that gives very quick and versatile OCP.
The STSPIN32F0252’s rugged design permits output pins to withstand below-ground spikes right down to -120V, which boosts the reliability of energy instruments. That includes onboard bus voltage sensing, the STEVAL-PTOOL2V1 board measures 77mm x 54mm. The ability stage options the ST Energy MOSFET N-channel, 80V, STripFET F7 expertise.
Each boards present a potentiometer for velocity variation, inputs for set off and rotation-direction setting, thermal shutdown and safety in opposition to reverse biasing of power-stage outputs. They’re provided with a heatsink already mounted.
The STEVAL-PTOOL1V1 and STEVAL-PTOOL2V1 can be found and will be obtained now from STMicroelectronics. The STSW-PTOOL1 firmware for STEVAL-PTOOL1V1 and STSW-PTOOL2 for STEVAL-PTOOL2V1 are downloadable freed from cost from the corporate web site.