Improvement of low speed characteristics of railway vehicle by sensorless control using high frequency injection

2002 ◽  
Author(s):  
Bon-Ho Bae ◽  
Gi-Bum Kim ◽  
Seung-Ki Sul
Keyword(s):  
High Frequency ◽  
Sensorless Control ◽  
Railway Vehicle ◽  
Low Speed

scholarly journals Active Q Flux Concept for Sensorless Control of Synchronous Reluctance Machines

2021 ◽  
Author(s):  
zhendong zhang ◽  
Jacob M. Lamb
Keyword(s):  
High Frequency ◽  
High Speed ◽  
Sensorless Control ◽  
Control Performance ◽  
Unstable Region ◽  
Low Speed ◽  
Salient Pole ◽  
Seamless Transition ◽  
Active Flux

<p>This paper proposes a new scheme to use active flux on q-axis for sensorless control of synchronous reluctance machines (SynRM). Conventionally, “Active Flux” on d-axis is adopted to convert a salient pole machine into a fictitious non-salient pole machine. However, the injected d-axis flux can deteriorate high frequency injection (HFI) sensorless control performance or even run the system into unstable region at low speed. This paper demonstrates active flux on q-axis can support back-EMF sensorless control at high speed and improve low speed HFI performance substantially. A seamless transition from HFI sensorless method to back-EMF voltage method is attained after adopting the proposed active q flux. Experiment results are used to validate the proposed method.</p>

Sign in / Sign up

Export Citation Format

Share Document