Skip to main content

Absolute Inductive Position Sensor

Overview

Description

This simple and cost-effective design utilizes off-the-shelf components like a standard PCB, a Renesas' position sensor, passive components, and a metal piece as a target. The sensing element consists of a set of coils on the PCB rather than inside the Renesas IC, allowing the sensor system to be tailored to specific customer applications. This flexibility enables the sensor system to be customized to the customer's needs. It uses dual inductive position sensors (IPS) for absolute position detection, optimizes coil size, and aligns with market trends such as 35mm motors.

System Benefits​:

  • Offers a budget-friendly solution while supporting high speeds up to 250,000 RPM.
  • Customizable for customer applications, supporting all three mechanical embodiment phases, with the number of motor pole pairs matching sensor sectors.
  • The MCU includes three ADC units with channel-dedicated sample and hold functions, allowing AD conversion to start with a synchronous trigger.
  • Provides high accuracy with an actual resolution of 15-bit and 12-bit accuracy.

Comparison

Applications

  • Rotor position detection for BLDC; adaptable to any pole pare count
  • Replacement of brushless resolvers
  • Magnet-free rotor speed sensors

Winning Combinations Interactive Diagram

Select a block to discover products for your design

4:3 ratio Outer Position Sensor Outer Position Sensor Outer Position Sensor Inner Position Sensor Inner Position Sensor Inner Position Sensor Sheet.1 Sheet.2 Sheet.3 Sheet.4 CN317 CN317 CN317 VCC-, GND-, RST, MD, A-, B- VCC- GND- RST MD A- B- VCC-GND-RSTMDA-B- Rotor with Motor Rotor with Motor Rotor with Motor Stator Stator Stator Vcc Opt2 LDO Vcc Opt2 LDO Vcc Opt2 LDO RS-422/RS-485 RS-422/RS-485 RS-422/RS-485 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Sheet.27 Sheet.28 Sheet.29 Sheet.30 Sheet.31 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.41 Sheet.42 Sheet.43 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Sheet.56 Sheet.57 Sheet.58 12V 12V 12V RS485/422 RS485/422 RS485/422 TX TX TX SinRX SinRX SinRX CosRX CosRX CosRX Sheet.65 Sheet.66 Sheet.67 TX TX TX SinRX SinRX SinRX CosRX CosRX CosRX Connector 1.156 Connector 1.156.73 5.0V 5.0V 5.0V Connector 1.156.75 Connector 1.156.76 SinP SinP SinP SinN SinN SinN CosP CosP CosP CosN CosN CosN SCLO, SDA0 SCLO, SDA0 SCLO, SDA0 SCL1, SDA1 SCL1, SDA1 SCL1, SDA1 SinP, SinN, CosP, CosN SinP, SinN, CosP, CosN SinP, SinN, CosP, CosN IRQ0 IRQ0 IRQ0 IRQ1 IRQ1 IRQ1 Label Text 10pt.262 Vcc Option 1 Vcc Option 1 5V/300mAmax 5V/300mAmax 5V/300mAmax UART UART UART 5/3.3V 5/3.3V 5/3.3V Sheet.94 System Control System Control System Control IRQ IRQ IRQ UART UART UART 12bit AD0/AD1 12bit AD0/AD1 12bit AD0/AD1 I2C0 I2C0 I2C0 I2C1 I2C1 I2C1 12bit AD2 12bit AD2 12bit AD2
Exiting Interactive Block Diagram