Hybrid-Electric Turbocharger and High-Speed SiC Variable-Frequency Drive Using Sensorless Control Algorithm

2018 ◽  
Vol 140 (12) ◽  
Author(s):  
Andrew L. Carpenter ◽  
Troy L. Beechner ◽  
Brian E. Tews ◽  
Paul E. Yelvington
Keyword(s):  
High Temperature ◽  
Control Algorithm ◽  
Sensorless Control ◽  
Speed Control ◽  
Test Stand ◽  
Switching Frequency ◽  
Variable Frequency ◽  
Variable Frequency Drive ◽  
High Switching Frequency ◽  
Hybrid Electric

Electrically assisted engine boosting systems lend themselves to better throttle response, wider effective operating ranges, and can provide the ability to extract excess energy during deceleration and high-load events (and store it in a vehicle's onboard batteries). This can lead to better overall vehicle performance, emissions, and efficiency while allowing for further engine downsizing and increased power density. In this research effort, a hybrid-electric turbocharger, variable-frequency drive (VFD), and novel sensorless control algorithm were developed. An 11 kW permanent-magnet (PM) machine was coupled to a commercial turbocharger via an in-line, bolt-on housing attached to the compressor inlet. A high-efficiency, high-temperature VFD, consisting of custom control and power electronics, was also developed. The VFD uses SiC MOSFETS to achieve high-switching frequency and can be cooled using an existing engine coolant loop operating at up to 105 °C at an efficiency greater than 98%. A digital sliding mode-observer sensorless speed control algorithm was created to command and regulate speed and achieved ramp rates of over 68,000 rpm/s. A two-machine benchtop motor/generator test stand was constructed for initial testing and tuning of the VFD and sensorless control algorithm. A gas blow-down test stand was constructed to test the mechanical operation of the hybrid-electric turbocharger and speed control using the VFD. In addition, a liquid-pump cart was assembled for high-temperature testing of the VFD. Initial on-engine testing is planned for later this year. This paper intends to present a design overview of the in-line, hybrid-electric device, VFD, and performance characterization of the electronics and sensorless control algorithm.

Hybrid-Electric Turbocharger and High-Speed SiC Variable-Frequency Drive Using Sensorless Control Algorithm

2017 ◽  
Author(s):  
Andrew L. Carpenter ◽  
Troy L. Beechner ◽  
Brian E. Tews ◽  
Paul E. Yelvington
Keyword(s):  
High Temperature ◽  
Control Algorithm ◽  
Sensorless Control ◽  
Speed Control ◽  
Test Stand ◽  
Switching Frequency ◽  
Variable Frequency ◽  
Variable Frequency Drive ◽  
High Switching Frequency ◽  
Hybrid Electric

Electrically-assisted engine boosting systems lend themselves to better throttle response, wider effective operating ranges, and can provide the ability to extract excess energy during deceleration and high-load events (and store it in a vehicle’s onboard batteries). This can lead to better overall vehicle performance, emissions, and efficiency while allowing for further engine downsizing and increased power density. In this research effort, a hybrid-electric turbocharger, variable-frequency drive (VFD), and novel sensorless control algorithm were developed. An 11kW permanent-magnet machine was coupled to a commercial turbocharger via an in-line, bolt-on housing attached to the compressor inlet. A high-efficiency, high-temperature variable-frequency drive, consisting of custom control and power electronics, was also developed. The variable-frequency drive uses SiC MOSFETS to achieve high-switching frequency and can be cooled using an existing engine coolant loop operating at up to 105 °C at an efficiency greater than 98%. A digital sliding mode-observer (DSMO) sensorless speed control algorithm was created to command and regulate speed and achieved ramp rates of over 68,000 rpm/sec. A two-machine benchtop motor/generator test stand was constructed for initial testing and tuning of the VFD and sensorless control algorithm. A gas blow-down test stand was constructed to test the mechanical operation of the hybrid-electric turbocharger and speed control using the VFD. In addition, a liquid-pump cart was assembled for high-temperature testing of the VFD. Initial on-engine testing is planned for later this year. This paper intends to present a design overview of the in-line, hybrid-electric device, VFD, and performance characterization of the electronics and sensorless control algorithm.

Automatic Speed Control of a Three Phase Induction Motor by Variable Frequency Drive

2021 ◽  
pp. 277-286
Author(s):  
Sayantan Chanda ◽  
Chayan Bandopadhyay ◽  
Maitreyee Banerjee ◽  
Shalini Mondol ◽  
Ankur Bhattacharjee
Keyword(s):  
Induction Motor ◽  
Speed Control ◽  
Variable Frequency ◽  
Variable Frequency Drive ◽  
Three Phase

Evaluation of Low Cost, High Temperature Die and Substrate Attach Materials for Silicon Carbide (SiC) Power Modules

2018 ◽  
Vol 2018 (1) ◽  
pp. 000317-000325
Author(s):  
Sayan Seal ◽  
Brandon Passmore ◽  
Brice McPherson
Keyword(s):  
High Temperature ◽  
Room Temperature ◽  
Operating Conditions ◽  
Acoustic Microscopy ◽  
Switching Frequency ◽  
Power Devices ◽  
Formidable Challenge ◽  
Die Attach ◽  
Power Modules ◽  
High Switching Frequency

Abstract The performance of SiC power devices has demonstrated superior characteristics as compared to conventional Silicon (Si) devices. Some of the advantages of SiC power devices over Si include higher voltage blocking capability, low specific on-resistance, high switching frequency, high temperature operation, and high power density. Thus, SiC modules are capable of processing significant levels of power within much smaller volumes compared with its Si counterparts. These high thermal loads present a formidable challenge in integrating SiC devices in power modules. For example, known-good materials and processes for silicon power modules are not rated at the aggressive operating conditions associated with SiC devices. Two of the most critical interfaces in a power electronics module are the die-attach and substrate- attach. A degradation in these interfaces often results in potentially catastrophic electrical and thermal failure. Therefore, it is very important to thoroughly evaluate die-attach materials before implementing them in SiC power modules. This paper presents the methodology for the evaluation of die attach materials for SiC power modules. Preforms of a lead-free high-temperature attach material were used to perform a die and substrate attach process on a conventional power module platform. The initial attach quality was inspected using non- destructive methods consisting of acoustic microscopy and x-ray scanning. Die attach and substrate attach voiding of < 5% was obtained indicating a very good attach quality. Cross-sectioning techniques were used to validate the inspection methods. The initial attach strength was measured using pull tests and shear tests. The measurements were repeated at the rated temperature of the module to ensure that the properties did not degrade excessively at the service temperature. At the rated module temperature of 175 °C, the die bonding strength was found to be ~ 75 kg. This was only 25% lower than the strength at room temperature. In addition, the contact pull strength was measured to be > 90 kg at 175 °C, which was 25% lower than the value measured at room temperature. The effect of power cycling and thermal cycling on the quality and strength of the die and substrate attach layers was also investigated.

Research on Multi-Speed Control of Variable-Frequency Drive

2014 ◽  
Vol 538 ◽  
pp. 425-428
Author(s):  
Xiao Na Song
Keyword(s):  
Previous Experiment ◽  
Speed Control ◽  
Variable Frequency ◽  
Variable Speed ◽  
Variable Frequency Drive ◽  
Experimental Teaching ◽  
Three Phase ◽  
Speed Mode ◽  
Plc Program

This paper introduces a noval experimental teaching project. Different from previous experiment, in this project, three-phase motor can operate at multi-speed mode or continuously variable speed mode controlled by PLC and VFD. The obvious characteristic of the experiment is that the VFD is controlled by PLC automatically. The configuration of the experiment including hardware and software is introduced in detail. The results of the execuation of the PLC program reveals that three-phase motor can operate in two modes according to the instructions from PLC. In addition, the speed can be changed with the corresponding parameters seting. Therefore, the knowledge of PLC and VFD are combined in one teaching project, through which student can master more practical technique. The work of this paper is significant for improving the students’ comprehensive capability.

scholarly journals Solar PV fed non-isolated DC-DC converter for BLDC motor drive with speed control

2019 ◽  
Vol 13 (1) ◽  
pp. 313
Author(s):  
G. G RajaSekhar ◽  
Basavaraja Banakar
Keyword(s):  
Control Method ◽  
Speed Control ◽  
Current Control ◽  
Operating Conditions ◽  
Switching Frequency ◽  
Bldc Motor ◽  
Solar Pv ◽  
Pv System ◽  
High Switching Frequency ◽  
Interleaved Boost Converter

<p>Brushless DC motors (BLDC) are predominantly used these days due to its meritorious advantages over conventional motors. The paper presents PV fed BLDC speeds control system. A closed-loop interleaved boost converter increases the voltage from PV system to required level. Converter for BLDC operates at fundamental switching frequency which reduces losses due to high switching frequency. Internal current control method is developed and employed for the speed control of PV fed BLDC motor by sensing the actual speed feedback. Internal current controlled PV fed BLDC drive is analyzed with increamental speed with fixed torque and decreamental speed with fixed torque operating conditions. Also the system with speed control is verified for variable torque condition. The system is developed and results are developed using MATLAB/SIMULINK software.</p><p><em> </em></p>

Design ADRC for Cutter Suction Dredger Cutter Motor Variable Frequency Drive System

2014 ◽  
Vol 1008-1009 ◽  
pp. 650-653 ◽  
Author(s):  
Ming Bai ◽  
Jin Hua Chen ◽  
Cheng Ning Xie ◽  
Fang Hui Li
Keyword(s):  
Virtual Instrument ◽  
Design Method ◽  
Harmonic Distortion ◽  
Speed Control ◽  
Mathematic Model ◽  
Drive System ◽  
Variable Frequency ◽  
Fundamental Wave ◽  
Variable Frequency Drive ◽  
Labview Platform

In order to achieve precise speed control for cutter suction dredger cutter motor, the controller should adapt well to uncertainties, such as geological environment, water flow, mechanical disturbance, etc. It makes the design of cutter motor controller always a hard work. This paper proposes an active disturbance rejection controller (ADRC) approach for cutter suction dredger cutter motor variable frequency drive system. Firstly, the LabVIEW platform was established by virtual instrument technology, which collected operating data of cutter motor in fundamental wave and total harmonic distortion (THD). Then cutter motor motion mathematic model was built and the ADRC design method was introduced. Lastly, the simulation results in the cutter velocity control and disturbance environments were done. The results show that the ADRC controller has strong robustness, and the precise speed control can be implemented.

scholarly journals Redesain Speed Control Submerged Scraper Conveyor (Ssc) Bottom Ash Menggunakan Ac Drive

2020 ◽  
Vol 2 (1) ◽  
pp. 39-53
Author(s):  
Fahrizal Reza ◽  
Ilmi Rizki Imaduddin
Keyword(s):  
Fly Ash ◽  
Local Control ◽  
Bottom Ash ◽  
Speed Control ◽  
Spare Part ◽  
Motor Drive ◽  
Variable Frequency ◽  
Variable Frequency Drive ◽  
Ac Drive ◽  
Machine Interface

Sistem kontrol penggerak Submerged Scrapper Conveyor (SSC) mempunyai peran yang sangat vital dalam proses kerja transportasi material limbah abu berat (bottom-ash) yang merupakan sisa hasil pembakaran batubara di boiler. Sistem kontrol penggerak SSC bekerja secara kontinyu 24 jam untuk menjaga agar material bottom ash tidak menumpuk di boiler hopper . Sistem ini harus selalu dijaga kehandalannya, karena apabila bermasalah maka akan berdampak langsung pada keberlangsungan operasi boiler di pembangkit yaitu menyebabkan derating.Sistem kontrol penggerak eksisting pada SSC menggunakan speed variator. Speed variator bekerja secara mekanis untuk mengatur kecepatan dari SSC yaitu dengan sistem hidrolik transmisi. Kecepatan perlu diatur untuk mengendalikan laju material bottom ash akibat variasi beban pembangkit. Apabila beban tinggi, maka material bottom ash akan lebih banyak dibanding pada beban rendah. Sistem penggerak SSC di PLTU Paiton Unit 1 dan 2 dengan speed variator dewasa ini banyak mengalami permasalahan. Mulai dari overheating, kerusakan inner part, hingga spare part yang sudah tidak tersedia (obsolete), selain itu penurunan nilai kalori batubara yang dipakai pada boiler juga menambah beban pada SSC dikarenakan limbah bottom ash yang semakin banyak.Untuk memaksimalkan kehandalan SSC di PLTU Paiton, maka dilakukan redesain speed control SSC. Redesain ini dilakukan dengan mengganti sistem kontrol penggerak SSC yang lama, yaitu speed variator dengan VFD (variable frequency drive) atau motor drive AC (Alternating Current). Redesain tersebut terdiri dari beberapa tahap, antara lain: (i) melakukan  penggantian peralatan pada sistem kontrol penggerak SSC antara lain motor SSC serta mengganti speed variator dengan VFD, (ii) memodifikasi wiring  dan logic  pada PLC sistem untuk mengontrol kecepatan SSC, (iii) melakukan modifikasi panel kontrol sehingga operasi SSC dapat dimonitor di CCR Fly Ash HMI Human Machine Interface dan local control station baik secara auto atau lokal.

scholarly journals Current Sensorless Control of Front-end Bidirectional AC/DC Converter Based on Half-bridge Topology

2013 ◽  
Vol 4 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Alexander Suzdalenko
Keyword(s):  
Control Algorithm ◽  
Sensorless Control ◽  
Reference Value ◽  
Current Control ◽  
Switching Frequency ◽  
Electrical Grid ◽  
Average Value ◽  
Control Functions ◽  
Continuous Current ◽  
Current Sensorless

Abstract Electrical grid modernization concept promotes the use of DC subgrids in order to improve efficiency, minimizing energy conversion count in the source-to-load chain. The present paper discusses an average current sensorless control algorithm for proposed bidirectional AC/DC converter, which is based on a dual half-bridge topology with common neutral wire that is not commutating during converter operation. The proposed current sensorless control algorithm has been obtained analytically for rectification, grid-tied and stand-alone inverter modes. The average value of inductor current tracks the reference current signal with constant switching frequency. Two control functions for inductor’s discontinuous and continuous current modes have been defined for each of the operation modes, and a sensorless transition between DCM and CCM modes has been stated. The proposed sensorless control algorithm has been also adapted for use with LCL input filter. The results of simulation in the PSIM software approved the analytical model, keeping the average inductor current to follow the reference value in inductor discontinuous and continuous conduction modes. Experimental investigation of the proposed current control algorithm provided similar results confirming the discussed theory.

scholarly journals MATLAB /Simulink Modelings and Experimental Design of Variable Frequency Drive for Speed Control of Three-Phase Induction Motor

2019 ◽  
Vol 8 (2) ◽  
pp. 3046-3052
Keyword(s):  
Induction Motor ◽  
Continuous Process ◽  
Speed Control ◽  
Drive System ◽  
Variable Frequency ◽  
Inrush Current ◽  
Variable Frequency Drive ◽  
Matlab Simulink ◽  
Three Phase ◽  
Wide Range

This paper presents the PWM (Pulse Width Modulation) based speed control of three-phase asynchronous (Induction) motor. Induction motor is the leading machine used in many industrial controls, automation processes and in the field of HVAC applications. However, induction motor has fixed rated speed when directly connected to ac supply. It is necessary to design a drive system to obtain variable speed at its output to fulfill the application requirement. For this reason, we have designed a “VFD (Variable Frequency Drive)”, which gives desired speed- according to load changes unlike the DC motors, which do not require any speed controlling drive. Currently with the technological elevation in drive systems, the speed control of induction motor is more economical, convenient, reliable, and accurate. It provides continuous process control over a wide range of speed. VFD not only controls the speed of induction motor but also make its starting smooth by reducing starting inrush current and improves power factor. In result, power consumption is also reduced. In this paper, we have designed and analyzed the MATLAB/Simulink model of open loop drive system and then implemented an experimental hardware design.

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