The LX34070 IC, now offered by Microchip Technology Inc, is specifically made for electric vehicle motor control applications. It combines differential output, fast sampling rates and features to make it functionally safe and compliant with ISO 26262 classification at Automotive Safety Integrity Level c (ASIL-C).
"Designers can use the LX34070 to pair with other functionally safe Microchip devices to further simplify electric vehicle motor control designs, including our 8-bit AVR and PIC microcontrollers, 32-bit microcontrollers and dsPIC digital signal controllers.” and “The LX34070 inductive position sensor enables lighter, smaller, more reliable motor control solutions that meet stringent safety requirements, reduce overall system cost, and Seamless and precise operation in the noisy environment of automotive DC motors, high currents and solenoid valves.”
Since the device is not dependent on magnet strength, the accuracy is higher and robustness is enhanced by actively rejecting stray magnetic fields. These features provide designers with greater flexibility to apply thin and lightweight PCB-based solutions to electric vehicle motor control designs. Inductive position sensor solutions offer many advantages over magnetic transformers and LVDTs at a fraction of the cost. By using PCB traces, rather than a transformer-based magnetic winding and coil structure, the size and mass of the device are negligible compared to one-pound alternatives.
A PCB-based inductive position sensor utilizes a primary coil to generate an AC magnetic field coupled to two secondary coils. Since a small metal target object interferes with the magnetic field, each secondary coil gets a different voltage, and its ratio is used to calculate the absolute position，the device now brings the same proven PCB materials, methods, and simplified low-cost packaging to electric vehicle motor control and other applications that require its high-speed and low-latency benefits.
