Copyright by Hyundai Motor Company. All rights reserved. MDPS

2 System Structure MDPS Control Module Torque Sensor Reduction gear (Plastic worm wheel) EPS Motor PCM(ECM) Vehicle speed ENG speed

3 MDPS Torque Sensor Non-Contact type [Linear Hall] Contact type [Potentiometer] Main, Sub signals have opposite phase each other Main, Sub signals have same phase each other MCPA Voltage cross type Voltage straight type

4 MDPS Torque Sensor [Internal Structure] Input shaft Rotor Stator Hall Sensor Stators Rotor Hall IC [Sensor principle] N N N S S S S

5 MDPS Engine Speed & Vehicle Speed Signal Engine speed from PCM(ECM) MDPS Control Module PCM(ECM) Vehicle speed Eng. speed Vehicle speed from PCM(ECM)

6 MDPS Power Supply & Warning Lamp MDPS Warning Lamp IG ON, Engine Stop: Keep ON Engine Starting : Turns off 2sec later after engine starting in normal condition. I/P junction box (Cluster 10A) Engine room junction box (MDPS 80A)

7 MDPS Motor Coil Permanent magnet Brush-less type DC motor (vs. brush type) - Small size and light weight - Higher rotating speed - More complicated control is required (higher cost) Max. Current: 65A Permanent magnet Stator

8 MDPS MDPS Control Module System Supplier: MANDO Thermister to detect the temperature is embedded in control module. Motor connector

9 MDPS Communication