Programmable Motor Controllers with Full Torque at Zero Speed for Sensorless Brushless DC Motors

Published  December 6, 2023   0
S Staff
New Motor Driver ICs - Renesas brushless DC Motor Controller

Renesas Electronics introduced its new family of brushless DC motor controllers. These new devices have Renases’s new patent-pending technologies that enable sensorless full torque at zero speed, which is an industry first. The new motor driver ICs enable customers to design sensorless BLDC motor systems with higher horsepower and speed at a given torque. They also improve power consumption and reliability while reducing cost and board space by lowering the number of components designers need to use. This new sensorless method is based on the following two innovations: 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 new motor driver ICs use conventional methods. Both of the new EIS and MRI algorithms include patent-pending technology developed by Renesas.
The new family has three new motor controller ICs. The RAA306012 65V, 3-phase Smart Driver is a standalone device that can be paired with a variety of MCUs from Renesas or from other sources. The RAJ306101 integrates a Renesas RX13T 32-bit MCU with the RAA306012 in a single package, reducing board space and improving cost and reliability. The RAJ306102 integrates a 16-bit Renesas RL78/G1F MCU with the RAA306012, providing similar integration benefits.

Key Features of the New RAJ306xxx Motor Driver ICs

  • High integration, including drivers, power management, and current sensing
  • Adaptive and adjustable dead time improves efficiency
  • The charge pump maintains steady gate drive voltage at programmed settings
  • Programmable gate drive voltage enables the driving of N MOSFETs and GaN FETs
  • Rich sensing blocks allow for better accuracy and wide-speed RPM drive
  • 16 programmable slew rate settings minimize electromagnetic emissions
  • Supports all types of motor control algorithms, such as Trapezoidal, Sinusoidal, and FOC
  • Extensive protection functions improve system safety