最佳化_mtpa.pptx
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This document discusses maximum torque per ampere (MTPA) control for permanent magnet synchronous motors (PMSM). It introduces Clarke and Park transforms which transform time-varying currents to direct currents. Field-oriented control with id set to 0 is presented, along with the method of calculating motor torque from d-q axis currents. MTPA control aims to find the ratio of id and iq currents to maximize torque while minimizing current. Analytical and numerical approaches are described and simulated results show MTPA control improves torque and reduces current compared to non-MTPA control. Future work involves implementing the golden search method on a microcontroller.
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To Design and simulate 3-Ø Induction motor drive
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meteorological changes. The improved control certifies a better stature for operation and maximizes the photovoltaic power in the grid-tied system.FPGA-Based Implementation Nonlinear Backstepping Control of a PMSM Drive
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Maximum power point tracking system for photovoltaic systems
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1) MPPT is used to maximize the power extracted from solar panels by adjusting the operating voltage to match the maximum power point. This can increase efficiency by 20-30%.
2) The main MPPT techniques are offline (open-circuit voltage, short-circuit current), online (perturb and observe, incremental conductance), and intelligent (artificial neural networks, fuzzy logic).
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IRAMY Inverter Control for Solar Electric Vehicle
Solar Electric Vehicles (SEV) are considered the future vehicles to solve the issues of air pollution, global warming, and the rapid decreases of the petroleum resources facing the current transportation technology. However, SEV are still facing important technical obstacles to overcome. They include batteries energy storage capacity, charging times, efficiency of the solar panels and electrical propulsion systems. Solving any of those problems and electric vehicles will compete-complement the internal combustion engines vehicles. In the present work, we propose an electrical propulsion system based on three phase induction motor in order to obtain the desired speed and torque with less power loss. Because of the need to lightweight nature, small volume, low cost, less maintenance and high efficiency system, a three phase squirrel cage induction motor (IM) is selected in the electrical propulsion system. The IM is fed from three phase inverter operated by a constant V/F control method and Space Vector Pulse Width Modulation (SVPWM) algorithm. The proposed control strategy has been implemented on the texas instruments TM320F2812 Digital Signal Processor (DSP) to generate SVPWM signal needed to trigger the gates of IGBT based inverter. The inverter used in this work is a three phase inverter IRAMY20UP60B type. The experimental results show the ability of the proposed control strategy to generate a three-phase sine wave signal with desired frequency. The proposed control strategy is experimented on a locally manufactured EV prototype. The results show that the EV prototype can be propelled to speed up to 60km/h under different road conditions.
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Drives
1. Concept on drives
2. What is drives ?
3. How drive does ?
4. What is torque ?
5. What is Motor Torque ( Tm )?
6. What is Motor Speed?
7. Drive are two types
8. AC Drive
9. DC Drive
10. Pulse Width Modulation
11. Sinusoidal PWM
12. Components of ASTAT
13. What is DTC ?
14. Direct Torque Control
15. Control Display Panel
16. ABB ACS800 DRIVE FOR CRANE
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最佳化_mtpa.pptx
- 1. 國立成功大學 National Cheng Kung University (NCKU) Maximum Torque per Ampere (MTPA) Control Student ：歐晉豪、湯為博 Date ：2020/06/23
- 2. 國立成功大學 National Cheng Kung University (NCKU) PMSM PMSM (permanent-magnet synchronous motor) Input three phase voltage to control the speed and torque of motor. 2
- 3. 國立成功大學 National Cheng Kung University (NCKU) Clarke and Park transform 3 Clarke transform Park transform time-varying current direct current
- 4. 國立成功大學 National Cheng Kung University (NCKU) FOC (field-oriented control) with id = 0 4 d,q α,β Inverter SV PWM d,q α,β PID PID α,β a,b,c PID MOTOR Speed/Rotor position feedback ic ib ia iα iβ id iq i* d + + - - ωr ω* r + - vq vd vβ vα Clarke Park Inverse Park 0 i* q
- 5. 國立成功大學 National Cheng Kung University (NCKU) Motor electrical torque(d-q axis) 5 When 𝑖𝑑 = 0, 𝑇𝑒 = 3𝑃 4 𝜆𝑚𝑖𝑞 Advantage : Easy to implement. Disadvantage : Because 𝑖𝑑 is zero, motor aquire more current to perform the same torque. λm: magnet flux linkage P : pole number LdLq: d-q inductance 𝐼𝑠: The total current we use 𝑇𝑒 𝑖𝑑 2 + 𝑖𝑞 2 = 𝐼𝑠 2 𝐼𝑠
- 6. 國立成功大學 National Cheng Kung University (NCKU) MTPA 6 I1 I2 I3 Id Iq T1 T2 T3 Is β Goal : Find the maximum torque by applied different ratio of 𝑖𝑑, 𝑖𝑞 𝑖𝑑 2 + 𝑖𝑞 2 = 𝐼𝑠 2
- 7. 國立成功大學 National Cheng Kung University (NCKU) Method Analytical approach (By build a table): 7 Numerical approach(Gold search method) : 5-9 ilterations Find optimal β to maximum the Torque function.(0 < β<359) Numerical approach(SQP) : Use the matlab function “fmincon()” to find the optimal value of 𝑖𝑑 and 𝑖𝑞 with constriant. 𝑖𝑑 2 + 𝑖𝑞 2 = 𝐼𝑠 2 Cost function :
- 8. 國立成功大學 National Cheng Kung University (NCKU) Motor specification 8 3.7kW motor
- 9. 國立成功大學 National Cheng Kung University (NCKU) Simulation result (under matlab simulink) 9 T e (N*m) No mtpa Analytical mtpa Numerical mtpa
- 10. 國立成功大學 National Cheng Kung University (NCKU) Simulation result (under matlab simulink) 10 Speed(rpm) No mtpa Analytical mtpa Numerical mtpa
- 11. 國立成功大學 National Cheng Kung University (NCKU) Simulation result (under matlab simulink) 11 Is Redune 1 A current in the 1000rpm and 16 N*m condition. 2600mAh No mtpa Analytical mtpa Numerical mtpa
- 12. 國立成功大學 National Cheng Kung University (NCKU) Future work 12 Apply the golden search method on the mcu compare to the traditional way(Look-up table)
- 13. 國立成功大學 National Cheng Kung University (NCKU) 13 THANK YOU FOR LISTENING