NTN-SNR Sensor Bearing for e-drive motors rewarded

INTRODUCTION

NTN-SNR and EFI have combined their superior bearing technology and automotive magnetic sensor

knowledge to create a series of integrated sensor bearings for e-drive motors.

The sensor bearing is the combination of a high speed automotive bearing with a magnetic angle sensor to

provide a solution dedicated to synchronous motor control for hybrid / electric vehicles. It delivers two

analog sine and cosine voltages that allow computing the absolute angular electric position. Its high

accuracy enables an optimized motor control with high efficiency.

The sensor bearing can be easily customized to different electric motor sizes and number of pole pairs.

This document describes the all in one solution but other configurations are also available like two parts

sensors or end of shaft integration.

HIGHLIGHTS

High compactness thanks to bearing and sensor integration Typical accuracy: 1°el for a 4 pole pairs motor, not dependent on assembly Easy mounting, no adjustment to take care of

1. High speed and acceleration capability, low delay, no front-end filtering

2. Lowest overall cost

3. Designed for safety applications according to ISO26262

4. Sine and cosine single ended or differential signals

5. Radial or axial wire output

6. Possibility of integrating a spring washer for pre-load

7. Possibility of integrating an axial stop

8. Compatible with harsh environment, dust, oil

APPLICATIONS

NTN-SNR absolute angular sensor bearing is designed for automotive applications with high speeds and

high accuracy such as synchronous electric motor control.

1. Traction for electric and hybrid vehicles

2. Electric Power Steering

3. Actuators

The adoption of NTN-SNR integrated sensor bearing allows detection of the rotor position required for

electric motor drive (commutation control) or positioning loop. The angular position value is available

immediately upon switch-on and can be called at any time by the subsequent electronics. There is no need

to move the shaft to find the reference position.

About BHR Bearing ( Shenzhen Qinggong Bearing Co, Ltd.)

Shenzhen Qinggong Bearing Co., Ltd. （www.bhrbearing.cn）is a well-know bearing manufacturer in China since the year 1996 with its own factory. Despite our own BHR bearings, we also distribute kinds of famous branded bearings from worldwide manufacturers SKF bearings, FAG bearings, NSK bearings, KOYO bearings, NTN bearings, NACHI bearings, ASAHI bearings, TOYOTA auto bearings......and OEM can also be supplied.

We BHR bearing is focused and committed to deliver our customers high quality products and solutions because they are at the core of everything we do. By combining technology with our design engineering expertise we are able to offer a breadth of advanced bearings and solutions. With variety of bearings, competitive prices, fast delivery and good after-sale service, hope we will get a chance to talk bearings together.