ICs hone sensorless BLDC motor design
Three motor driver ICs from Renesas enable full torque at zero speed from brushless DC (BLDC) motors without sensors. The parts enable the creation of sensorless BLDC motor systems with higher horsepower and speed at a given torque. According to the manufacturer, the ICs improve power consumption and reliability, while reducing board space by lowering the number of components needed.
The RAA306012 is a 65-V, 3-phase smart gate driver that pairs with a variety of MCUs from Renesas or from other sources. Two other devices, the RAJ306101 and RAJ306102, save board space by integrating the smart gate driver with a Renesas 32-bit or 16-bit MCU, respectively, in a single package.
The ability to enable full torque at zero speed without sensors is made possible by two Renesas patent-pending algorithms. Enhanced inductive sensing (EIS) offers stable position detection when the motor is completely stopped. When the motor is operating at extremely low speed, motor rotor position identification (MRI) is used. At higher speeds, the driver ICs use conventional methods.
All three devices are available now. The RAA306012 comes in a 7×7-mm, 48-pin QFN package. The RAJ306101 and RAJ306102 are housed in 8×8-mm QFNs with 56 pins and 64 pins, respectively. Evaluation kits for each device are also available.
Find more datasheets on products like this one at Datasheets.com, searchable by category, part #, description, manufacturer, and more.
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