Sökning: "polarity detection"
Visar resultat 1 - 5 av 11 avhandlingar innehållade orden polarity detection.
1. Modeling and Control of a PMSynRel Drive for a Plug-InHybrid Electric Vehicle
Sammanfattning : This thesis presents two transient models for a prototype integrated charger for use in a plug-in hybrid-electrical vehicle application. The models can be useful in order to develop control algorithms for the system or to recommend improvements to the machine design. LÄS MER
2. Sample Preparation of Organic Compounds in Environmental Analysis using Liquid Membrane Extraction
Sammanfattning : This thesis demonstrates the potential of the liquid membrane extraction technique as an alternative method for the analysis of trace ionisable organic compounds in the environment. Liquid membrane based extraction methods for the analysis of s-triazine herbicides and phenolic compounds were developed. LÄS MER
3. Growth and characterisation of InGaAs-based quantum dots-in-a-well infrared photodetectors
Sammanfattning : This thesis presents results from the development of quantum dot (QD) based infrared photodetectors (IPs). The studies include epitaxial growth of QDs, investigations of the structural, optical and electronic properties of QD-based material as well as characterisation of the resulting components. LÄS MER
4. Partial Discharge Analysis at Arbitrary Voltage Waveform Stimulus
Sammanfattning : Partial discharge (PD) detection is widely used to diagnose the defects and degradation in an electrical insulation system. Generally, PD are measured with 50 Hz AC sinusoidal voltage in the on-line situation, but can also be detected at other voltage stimulus in some off-line situations. LÄS MER
5. New Materials and Improved Ambient Techniques in Mass Spectrometry
Sammanfattning : Mass spectrometry (MS) is used in several fields, e.g. biology, environmental monitoring, medicine and forensics due to excellent qualitative and quantitative capabilities. The development of new instrumental setups and ionization sources is crucial to analyze a variety of compounds at trace levels. LÄS MER