The synthetic loading of three-phase induction motors using microprocessor controlled power electronics

Grantham, C.; Sheng, Minhao

doi:10.1109/peds.1995.404876

Cited by 9 publications

(2 citation statements)

References 35 publications

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“…2 ). The experiments conducted with this method explored a range of 10%-30% of rated voltage magnitude for the auxiliary voltage, and 45-55 Hz for auxiliary frequency [7,9]. The vector representation of this method is depicted in Figure 2(c).…”

Section: Dual Frequency Supply Methodsmentioning

confidence: 99%

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Equivalent loading of induction motors using a new composite power supply with a linear (U/Hz) characteristic

Soltani

Szabados

Hajian

2006

Euro. Trans. Electr. Power

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SUMMARYThis paper describes a mixed variable voltage magnitude variable frequency (VVMVF) power supply with linear U/Hz characteristic that can be used for equivalent loading of ac machines. The proposed voltage source ensures the rated air gap flux as well as forces the rated current (I rms ) inside the test machine without the need to connect a mechanical load to the shaft. This means that the motor total losses essentially will be the same as under normal full load operation. A comparison is first made between those of equivalent loading schemes of induction machine that use the frequency and magnitude modulating voltage sources. Then the practical implementation of a 1.5 kW voltage source of the above mentioned type is presented which is achieved by series connection of a regular constant voltage and frequency source (the motor-rated source) and a special PWM inverter (auxiliary source), using an isolating transformer. The mixed single-phase source is used for synthetic loading of a capacitor start single-phase induction motor. Simulation and experimental results obtained are in close agreement.

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Section: Dual Frequency Supply Methodsmentioning

confidence: 99%

“…So far, several schemes have been developed for synthetic loading of induction motors [1][2][3][4][5][6][7]. According to Kron [1,2], the two-frequency method (DF) proposed by Ytterberg in 1921, is one of the most the rated flux in the motor air gap.…”

Section: Introductionmentioning

confidence: 99%

Equivalent loading of induction motors using a new composite power supply with a linear (U/Hz) characteristic

Soltani

Szabados

Hajian

2006

Euro. Trans. Electr. Power

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Synthetic loading applied to linear permanent magnet synchronous machines

Abbas

Fletcher

2010

IET Renew. Power Gener.

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Linear permanent magnet (PM) machines are applicable to a number of prototype renewable energy devices and therefore are candidates for deployment. Synthetic loading for efficiency evaluation of linear PM synchronous machines is described and evaluated. Synthetic loading is a technique that eliminates the need for an external mechanical load to absorb generated shaft power during rated load efficiency tests. As such it is a technique ideally suited to the large linear PM generators proposed for renewable applications. Mathematical expressions for synthetic loading are derived for the linear PM synchronous machine using the dq machine model that includes core loss. Synthetic loading and standard efficiency tests, as methods of efficiency evaluation, are simulated using MATLAB and SIMULINK. Simulation data are verified by experiment for both the synthetic loading test and the standard efficiency test. Simulation and experimental results show that the synthetic loading method is capable of evaluating the efficiency of linear PM synchronous machine under test. The results show good agreement with standard efficiency tests. The key contribution of this work includes the mathematical expressions of synthetic loading applied to linear PM synchronous machines, the hardware and software implementation of the technique and the validation of the synthetic loading as a technique for efficiency evaluation of linear PM synchronous machines

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Investigation of Losses in Regenerative Testing for a 240-kW Sectored Dual-Three-Phase PMSM

Guo,

Cheng,

Shao

et al. 2023

2023 26th International Conference on Electrical Machines and Systems (ICEMS)

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The synthetic loading of three-phase induction motors using microprocessor controlled power electronics

Cited by 9 publications

References 35 publications

Equivalent loading of induction motors using a new composite power supply with a linear (U/Hz) characteristic

Equivalent loading of induction motors using a new composite power supply with a linear (U/Hz) characteristic

Synthetic loading applied to linear permanent magnet synchronous machines

Investigation of Losses in Regenerative Testing for a 240-kW Sectored Dual-Three-Phase PMSM

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