Microchip Technology (Asia General Manager and Korea Representative Byung-Don Han) is leading the global trend toward moving away from expensive, low-accuracy magnet-based solutions for position monitoring of electric vehicle (EV) motors through inductive sensors.

Microchip Technology Inc. (NASDAQ: MCHP) today announced the expansion of its industry-leading family of inductive position sensors into the electric vehicle motor control market with the LX34070 integrated circuit (IC) designed specifically for electric vehicle motor control applications.

The product offers differential output, fast sampling rates, and features that help achieve functional safety certification for ISO 26262 compliance up to Automotive Safety Integrity Level C (ASIL-C).

Today, developers of motor control systems are rapidly replacing Hall-effect position sensors and older magnetic resolver solutions with inductive sensors.

Inductive sensors enable integration onto simple, compact printed circuit boards (PCBs) by eliminating expensive magnets and other heavy transformer-based structures.

“The LX34070 inductive position sensor enables designers to develop lighter, smaller and more reliable motor control solutions that meet stringent safety requirements, reduce total system cost and operate smoothly and accurately in the noisy environments of automotive DC motors, high currents and solenoids,” said Fanie Duvenhage, vice president of Microchip’s Mixed-Signal and Linear Analog Business Unit.Can be pronounced. Developers can further simplify electric vehicle motor control designs by pairing the LX34070 with Microchip’s other functional safety-certified devices, including Microchip’s 8-bit AVR® and PIC® microcontrollers (MCUs), 32-bit MCUs, and dsPIC® digital signal controllers,” he explained.

■ LX34070 offers a variety of benefits at a much lower cost

The LX34070 inductive position sensor solution offers several benefits at a significantly lower cost than magnetic resolvers and linear voltage differential transducers (LVDTs).

The LX34070 device uses PCB traces rather than transformer-based magnetic windings or coil structures, making it negligible in size and mass compared to other devices that weigh up to 500 grams.

Additionally, the LX34070 is more accurate because it does not rely on magnet strength, and is more robust because it actively rejects stray magnetic fields.

These and other features provide developers with greater flexibility when deciding where to deploy the thin, lightweight PCB-based LX34070 solution in electric vehicle motor control designs.

PCB-based inductive position sensors use a primary coil to generate an AC magnetic field that is connected to two secondary coils.

A small metal target object disturbs the magnetic field, causing the two secondary coils to receive different voltages, the ratio of which is used to calculate absolute position.

Meanwhile, e4ds news will hold the 2022 e4ds Industrial Motor Control Technology Conference at the main auditorium of the Korea Conference Center (Gangnam Station) on July 22.

This conference will explain the operating principles of transformers, generators, and electric motors, which are the core of motor control, and will share key development points and help developers understand by implementing actual models using MATLAB Simulink.

More information about the conference can be found on the e4ds conference page ( https://www.e4ds.com/seminar_introduce.asp?idx=132 ).