Uncontrolled generation in interior permanent magnet machines

Liaw, C.Z.; Soong, W.L.; Welchko, B.A.; Ertugrul, N.

doi:10.1109/ias.2004.1348387

Cited by 3 publications

(6 citation statements)

References 11 publications

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“…Although magnetic saturation in the d-axis has a pronounced effect on the magnitude of the phase currents at low speeds, the application of this work is the high speed PMSG. Also, for the maximum q-axis current produced at rated speed and up to rated load of PMSG, is still in the unsaturated region, so magnetic saturation can be neglected [34].…”

Section: B Pmsg Modelmentioning

confidence: 99%

Real-Time Emulation of a High-Speed Microturbine Permanent-Magnet Synchronous Generator Using Multiplatform Hardware-in-the-Loop Realization

Hasanzadeh

Edrington

Stroupe

et al. 2014

IEEE Trans. Ind. Electron.

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This paper demonstrates a multi-platform hardware-in-the-loop approach to observe the operation of a high speed permanent magnet synchronous generator coupled with a micro-turbine in an all-electric-ship power system. The mathematical model of the gas-turbine and dynamic equations of the high speed generator are implemented in real-time on an FPGA. This real-time simulation interfaces with hardware via a serial peripheral interface to a supervisory DSP of a 3-phase voltage source inverter. The inverter output load is virtually emulated in the FPGA using received hardware measurements from DSP. A user input interface is introduced using dSPACE on a PC to acquire data and adjust the speed reference of the generator system through a serial communications interface to the DSP. The real-time simulation and hardware-in-the-loop experimental setup are validated in a scaled-medium-voltage-DC ship power system. Index Terms-Real-time emulation, gas-turbine (GT), high speed permanent magnet synchronous generator (PMSG), multi-platform hardware-in-the-loop (HIL), simulation, voltage source inverter (VSI), FPGA, DSP, dSPACE, all-electric-ship (AES). NOMENCLATURE , , PMSG phases electromotive forces (EMF), V. Stator resistance, Ω. Stator leakage inductance, H. Applied positive torque, N.m. Applied mechanical torque to shaft, N.m. , Direct and quadrature axis currents, A. , Direct and quadrature axis fluxes, Wb-turns. Synchronous frequency, electrical rad/s. Angular position, electrical rad/s. Total moment of inertia, kg.m 2 . Number of pole pairs. Magnetic flux linkage of permanent magnets, Wb. , Direct and quadrature axis voltages of stator, V. Equivalent Thévenin 3-phase resistances of the power factor corrected (PFC) load across the stator windings, Ω. , , Base torque, power, and speed of micro-turbine (MT), N.m, W, and rad/s, respectively. , Rotor mechanical speed and its reference, rad/s. ). , , Direct and quadrature axis currents and rotor mechanical speed calculated in each iteration, A, A, and rad/s, respectively. , τ, , FPGA arbitrary computational time-step and the desired time delay, SPI communication as well as pulse width modulation (PWM) timesteps, sec. , Generator 3-phase stator root-mean-square (RMS) voltages and currents, V and A. , , Generator 3-phase stator voltages, currents, and linkage fluxes V, A, and Wb-turns, respectively. Derivative operand. , , , Temperature controller parameters of GT. , , VSI output LC filter parameters, H, Ω and F, respectively. , Switching and output frequency of VSI, Hz. , VSI input DC and output RMS voltage, V. Amin Hasanzadeh (M'11) received his B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering from Sharif

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Section: B Pmsg Modelmentioning

confidence: 99%

Real-Time Emulation of a High-Speed Microturbine Permanent-Magnet Synchronous Generator Using Multiplatform Hardware-in-the-Loop Realization

Hasanzadeh

Edrington

Stroupe

et al. 2014

IEEE Trans. Ind. Electron.

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“…At dc-link voltages comparable to the rectified back EMF, the calculated curves show a voltage "overshoot" effect where the voltage under load is greater than the open-circuit voltage [6]. The significant discrepancy with the measured results in this part of the curve is likely due to the discontinuous current waveforms in this region [6], resulting in a breakdown of the model assumptions.…”

Section: Alternator Voltage-current Curvesmentioning

confidence: 68%

“…The significant discrepancy with the measured results in this part of the curve is likely due to the discontinuous current waveforms in this region [6], resulting in a breakdown of the model assumptions.…”

Section: Alternator Voltage-current Curvesmentioning

confidence: 81%

“…In the case of an uncontrolled rectifier, the alternator operates in uncontrolled generation (UCG) [5], [6]. As the speed increases from standstill, the dc output current remains at zero up to the speed at which the rectified back electromotive force (EMF) equals the dc-link (battery) voltage (see Fig.…”

Section: A Uncontrolled Rectifier Operationmentioning

confidence: 99%

“…The model also incorporates the effects of magnetic saturation and stator resistance. A full description of the model is given in [6].…”

Section: A Interior Pm Alternatormentioning

confidence: 99%

See 2 more Smart Citations

Investigation of inverterless control of interior permanent magnet alternators

Liaw¹,

Whaley²,

Soong³

et al.

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

Self Cite

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Abstract-This paper investigates the performance and control of a low-cost 6-kW concept demonstrator of an "inverterless" automotive alternator. This is based on a switched-mode rectifier (SMR) combined with a high-flux interior permanent-magnet (PM) machine. Duty cycle control of the SMR is described and the theoretical predictions are compared with open-loop experimental results. The efficiency of the concept demonstrator is examined as a function of speed and load. Control issues regarding automotive operation are discussed.Index Terms-Alternator, interior permanent-magnet (PM) machine, inverterless, switched-mode rectifier.

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Electric Machines and Drives in HEVs

Masrur

Gao

2011

Hybrid Electric Vehicles

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Advances in electric machines, along with progress in power electronics, are the key enablers for electric, hybrid electric, and plug-in hybrid electric vehicles (HEVs). Induction machines, permanent magnet (PM) synchronous machines, PM brushless DC machines, and switched reluctance machines (SRMs) have all been considered in various types of vehicle powertrain applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Brushed DC motors, once popular for traction applications such as in streetcars, are no longer considered a proper choice due to the bulky construction, low efficiency, the need for maintenance of the brush and commutator, high electromagnetic interference (EMI), low reliability, and limited speed range.When using electric motors for powertrain applications, there are a few possible configurations. Today's electric motors, combined with inverters and associated controllers, have a wide speed range for constant torque operations, and an extended speed range for constant power operations, which make the design of the powertrain much easier. Depending on the configuration of the hybrid powertrain, the design and selection of electric motor drives can also be different. For example, for series hybrid vehicles, the powertrain motor needs to be able to provide the required torque and speed for all driving conditions. Hence, the size of the motor will be fairly large, usually rated at 100 kW or more for passenger cars. A PM motor or an induction motor is the preferred choice. For mild and micro hybrids, only a small-size motor of a few kilowatts is required. Therefore the motor can be a claw pole DC motor, or a switched reluctance motor.Traditional automatic transmission or continuous variable transmission (CVT) used in conventional cars are no longer required in electric vehicles (EVs) and many HEVs. However, a fixed gear ratio speed reduction is often necessary. This is due to the fact that a high-speed motor has smaller size and less weight than a low-speed machine. A two-speed automatic transmission may be beneficial in saving vehicle energy consumption.Hybrid Electric Vehicles: Principles and Applications with Practical Perspectives, First Edition.

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Uncontrolled generation in interior permanent magnet machines

Cited by 3 publications

References 11 publications

Real-Time Emulation of a High-Speed Microturbine Permanent-Magnet Synchronous Generator Using Multiplatform Hardware-in-the-Loop Realization

Real-Time Emulation of a High-Speed Microturbine Permanent-Magnet Synchronous Generator Using Multiplatform Hardware-in-the-Loop Realization

Investigation of inverterless control of interior permanent magnet alternators

Electric Machines and Drives in HEVs

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