---
title: Coreless motor data - EURARI
description: Coreless DC motor technical data: construction, performance characteristics, speed-torque behavior and selection notes. EURARI coreless motor reference.
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Technical Information for Motor-Gearbox Combinations, ⑨，Coreless motor data

### TDC coreless brush motor features:

No magnetic cogging  
Rigorous structure and small size  
High energy conversion rate  
Multi-pole commutator to reduce torque ripple  
Low moment of inertia,good servo characteristics  
Flexibe with reducer and encoder  
Outstanding linear parameter characteristic relationship

### TDC coreless brush motor winding form:

High-power chip array winding  
Low-power laminated winding  
The above two types of windings can be based on parameter requirements Choose differently,the wire diameter and the number of turns of the enameled wire comply with The following features

### Low impedance between phases:

The winding wire diameter is large,and the number of winding turns is small  
Large starting current  
High speed constant（high KV value）

### High impedance between phases:

The winding wire diameter is small,and the winding turns are many  
Low startin current  
Low speed constant (low kt value)

### TDC coreless brush motor service life:

Under normal circumstances,the service life of the motor and the work of the motor.The environment has a huge impact.In a good environment,electrical engineering.The working life is longer than that in harsh environments.Generally,our The service life of the motor can reach about 1000 hours.

### Foctors affecting life:

1. The higher the speed the greater the mechanical wear of the brush set
2. Working mode:high start/stop frequency or forward/reverse switching High frequency will accelerate the service life of the motor
3. Load The greater the current load,the greater the wear
4. Environment Dust,temperature/humidity,vibration,and installation methods will all have an impact on life
 
### Features of TBC Coreless Brushless motor:

long lasting high efficiency No slot effect under reasonable design Good servo characteristics Strong overload capacity High power density Can operate in high temperature environment Adopt boron strong magnet

### TDC coreless beushless motor winding type and Coreless brushed motors have the same winding from Features of TBC-4 pole series:

The rotor adopts 2 pairs of ppoles, with super power density Really small size and high power Winding adopts chip array method High speed,high torque output Fast startup response

### TBC series classification:

Switch latch type Hall, sensor Linear Hall senor(linear Hall driver can be configured),No Hall sensor,Internal integrated drive,High temperature medical sterilization

### TBC service life:

TBC coreless brushless motor,with a long service life when matched with NMB ball bearing Up to tens of thousands of hours,the service life is affected by high speed,dynamic balance vibration and bearing load

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