Contactless Electrical Energy Transfer System Via

Stan książki: NOWA

Wydawnictwo Politechniki Gdańskiej

Format: B5

Wydział: Elektrotechnika

Opis:

The monograph describes the contactless inductive power transfer system IPT, by which electrical energy may be transmitted, without electrical connection or physical contact, through the large air gap. In this case energy is transmitted via coreless transformer. Coupling between the coils changes and depend on dimension of air gap. The efficiency of IPT is mainly depended on the transmission frequency. Additionally large leakage inductances may be compensated also in resonance condition by adding capacitors to the coils. The monograph presents theoretical analyses and simulation results of transformer equivalent circuit with capacitors. Theoretical developments are compared with practical measurements from a prototype contactless system.

Słowa kluczowe:

air coil, electrical energy transfer

CONTENTS

SYMBOLS..5

1.INTRODUCTION .. 9

2.ANALYSIS OF THE EXPERIMENTAL MODEL OF MAGNETICALLY COUPLED COILS SYSTEM .. 13

2.1. Distribution of magnetic field for a system of air-spaced coils .. 13

2.1.1. Analysis of the parameters of a disc coil .. 13

2.1.2. Analysis of parameters of a magnetically coupled disc coils system .. 15

2.2. Distribution of magnetic flux for a system of coils in the proximity of ferro-magnetic objects.. 17

2.3. Electromagnetic compatibility .. 20

3.ANALYSIS OF CIRCUIT MODEL OF MAGNETICALLY COUPLED COILS .. 25

3.1. Circuit model of magnetically coupled coils system..25

3.2. Analysis of the steady state with harmonic supply .. 27

3.2.1. Resonant circuit in series-series configuration .. 27

3.2.1.1. Global resonance .. 27

3.2.1.2. Branch resonance .. 32

3.2.2. Resonant circuit in series-parallel configuration .. 37

3.3. Analysis of sensitivity.. 42

3.4. Area of acceptable operating parameters .. 46

4.ANALYSIS OF THE IPT SYSTEM FED FROM A VOLTAGE INVERTER .. 51

4.1. Model of the IPT system .. 51

4.2. Simulation of quasi-steady conditions .. 52

4.3. Analysis of control system stability .. 57

4.4. Simulation analysis of transient states .. 66

5.EXPERIMENTAL SETUP OF INDUCTIVE POWER TRANSFER SYSTEM .. 74

5.1. System of coils with weak magnetic coupling .. 74

5.2. High-frequency voltage inverter .. 75

5.3. Microprocessor implementation of control unit .. 72

5.4. Experimental research ... 79

6.SUMMARY .. 90

REFERENCES .. 91