INNOVATIVE EFFICIENT RELIABLE POWERFUL Induction Motor - PowerPoint PPT Presentation

INNOVATIVE EFFICIENT RELIABLE POWERFUL Induction Motor Computation

Design criteria for induction motors Standardization • Efficiency (IEC 60034-30) • Sizing (IEC 60072-1) • Measurement methods (IEC 60034-2-1) Variety / Customization • Behaviour under grid restrictions (IEC 60034-1) • Winding variants • Cooling methods (IEC 60034-6) Inverter controlled drives • Behaviour at different setpoints (IEC 61800-9-2) • Possible Basis: Equivalent circuit data (IEC 60034-28) Design criteria • Comply with all given constraints • Minimize resources / costs

Design criteria for induction motors Standardization Standardization • Efficiency (IEC 60034-30) • Efficiency ( IEC 60034-30 ) • Sizing (IEC 60072-1) • Sizing ( IEC 60072-1 ) • Measurement methods • Measurement methods ( IEC 60034-2-1 ) (IEC 60034-2-1) Variety / Customization Variety / Customization • Behaviour under grid restrictions • Behaviour under grid restrictions ( IEC 60034-1 ) (IEC 60034-1) • Winding variants • Winding variants • Cooling methods ( IEC 60034-6 ) • Cooling methods (IEC 60034-6) Inverter controlled drives Inverter controlled drives • Behaviour at different setpoints • Behaviour at different setpoints (IEC 61800-9-2) ( IEC 61800-9-2 ) • Possible Basis: Equivalent circuit data • Possible Basis: Equivalent circuit data (IEC 60034-28) ( IEC 60034-28 ) Design criteria Design criteria • Comply with all given constraints • Comply with all given constraints • Minimize resources / costs • Minimize resources / costs

Design cycle for induction motors • Customized Design Analytical motor Design model Measure- Prototype ment • Comparison • Motor Data "chick21" by MattX27 is licensed under CC BY-SA 2.0 "egg" by zero.the.hero is licensed under CC BY-SA 2.0 Definition Which came first: Prototype or model?

Design cycle for induction motors • Customized • Customized Design Design Analytical Analytical motor motor Design Design model model Measure- Measure- Prototype Prototype ment ment • Comparison • Comparison • Motor Data • Motor Data "chick21" by MattX27 is licensed under CC BY-SA 2.0 "egg" by zero.the.hero is licensed under CC BY-SA 2.0 Definition Definition Which came first: Prototype or model?

Modeling example: based on IEC 60034-28 𝚫 -equivalent circuit

Modeling example: based on IEC 60034-28 • No-load test, i.e. 𝑡 = 0 • Measurements of Current and Power for varying Voltage at 60Hz 𝚫 -equivalent circuit Measurement: no-load test

Modeling example: based on IEC 60034-28 • No-load test, i.e. 𝑡 = 0 • Measurements of Current and Power for varying Voltage at 60Hz • Get machine data by IEC Standard 𝚫 -equivalent circuit Measurement: no-load test Model data derived from no-load test

Modeling example: based on IEC 60034-28 • No-load test, i.e. 𝑡 = 0 • Measurements of Current and Power for varying Voltage at 60Hz • Get machine data by IEC Standard • Fit Data to get applicable model 𝚫 -equivalent circuit Measurement: no-load test Model data derived from no-load test

Analytical motor models – the big picture • Induction machine can be described in 𝑔 𝑆 /𝐽 𝑇 -plane (analogy to 𝐽 𝑒 /𝐽 𝑟 -plane for PM) (see e.g. Winzer/Doppelbauer 2013) • No-load results are for 𝑔 𝑆 = 0 Stator flux (absolute value) from measurement-based model in 𝒈 𝑺 /𝑱 𝑻 -plane

Analytical motor models – the big picture • Induction machine can be described in 𝑔 𝑆 /𝐽 𝑇 -plane (analogy to 𝐽 𝑒 /𝐽 𝑟 -plane for PM) (see e.g. Winzer/Doppelbauer 2013) • No-load results are for 𝑔 𝑆 = 0 • Load-test from IEC 60034-2-1 has constant flux Stator flux (absolute value) from measurement-based model in 𝒈 𝑺 /𝑱 𝑻 -plane

Analytical motor models – the big picture • Induction machine can be described in 𝑔 𝑆 /𝐽 𝑇 -plane (analogy to 𝐽 𝑒 /𝐽 𝑟 -plane for PM) (see e.g. Winzer/Doppelbauer 2013) • No-load results are for 𝑔 𝑆 = 0 • Load-test from IEC 60034-2-1 has constant flux • Inverter-fed motor requires to fill the plane. How to? More Measurements? Stator flux (absolute value) from measurement-based model in 𝒈 𝑺 /𝑱 𝑻 -plane

Analytical motor models – the big picture • Induction machine can be described in 𝑔 𝑆 /𝐽 𝑇 -plane (analogy to 𝐽 𝑒 /𝐽 𝑟 -plane for PM) (see e.g. Winzer/Doppelbauer 2013) • No-load results are for 𝑔 𝑆 = 0 • Load-test from IEC 60034-2-1 has constant flux • Inverter-fed motor requires to fill the plane. How to? More Measurements? • Computation needed • Need for Accuracy! A model must be tunable to meet the measurement results ! Stator flux (absolute value) from Stator flux (absolute value) from measurement-based model in 𝒈 𝑺 /𝑱 𝑻 -plane computation-based model in 𝒈 𝑺 /𝑱 𝑻 -plane

Conclusion: Requirements for motor design software for induction motors • Customized Design Analytical motor Design model Measure- Prototype ment • Comparison • Motor Data Definition

Conclusion: Requirements for motor design software for induction motors Analytical motor Design model Measure- Prototype ment

Conclusion: Requirements for motor design software for induction motors 1) Reproduction : Accurate reproduction of (standardized) measurements Analytical motor Design model FE-Model/ Data Prototype

Conclusion: Requirements for motor design software for induction motors 1) Reproduction : Accurate reproduction of (standardized) measurements 2) Extension: Accurate computation of load-points or cooling conditions Calibrated Analytical that have not been measured (AEDM) analytical motor Design Design motor model model FE-Model/ FE-Model/ Data Data Prototype Prototype

Conclusion: Requirements for motor design software for induction motors 1) Reproduction : Accurate reproduction of (standardized) measurements 2) Extension: Accurate computation of load-points or cooling conditions Calibrated Analytical that have not been measured (AEDM) analytical motor Design Design motor 3) Extrapolation : model model For Predesign: compute results under small design changes with FEM only FE-Model/ Data Data FE-Model Prototype Reference: Calculation of Efficiency Maps of Induction Motors Using Finite Element Method - Winzer, Doppelbauer 2013