IEE Proceedings - Electric Power Applications
Volume 141, Issue 1, January 1994
Volumes & issues:
Volume 141, Issue 1
January 1994
-
- Author(s): I. Boldea ; N. Muntean ; S.A. Nasar
- Source: IEE Proceedings - Electric Power Applications, Volume 141, Issue 1, p. 1 –6
- DOI: 10.1049/ip-epa:19949789
- Type: Article
- + Show details - Hide details
-
p.
1
–6
(6)
The paper presents an implementation of a low-cost robust digital-analogue (hybrid) speed (and position) vector controller for cageless-rotor reluctance synchronous motors. Separate control of id and is is performed with id* (reference value) constant up to the base speed and reducing gradually above the base speed. On the other hand, iq* (reference value) is set by a sliding-mode analogue speed (and position) controller for which a simplified design methodology is presented. A 6-pole experimental reluctance synchronous motor with an axially laminated anisotropic cageless rotor is introduced with its inductances Ld, Lq and torque measured through standstill tests. Digital simulation and test results for position and speed vector control are presented. - Author(s): R. Rabinovici
- Source: IEE Proceedings - Electric Power Applications, Volume 141, Issue 1, p. 7 –11
- DOI: 10.1049/ip-epa:19949775
- Type: Article
- + Show details - Hide details
-
p.
7
–11
(5)
A simple and effective method for calculating the core eddy current losses in permanent magnet motors is presented. It uses the back EMF per tooth induced in the stator windings by the rotation of the permanent magnets. The eddy current losses of the stator yoke can also be evaluated as a function of the back EMF per tooth waveform. Simple expressions are obtained for motors with an even number of slots per pole pair. The experimental results refer to a permanent magnet motor with four poles and 36 slots. The proposed method is a general one, which does not depend on the number of motor slots or poles. It gives the possibility of using back EMF waveforms which are acquired experimentally or by numerical methods. - Author(s): I.M. Canay
- Source: IEE Proceedings - Electric Power Applications, Volume 141, Issue 1, p. 13 –18
- DOI: 10.1049/ip-epa:19949862
- Type: Article
- + Show details - Hide details
-
p.
13
–18
(6)
A method is presented for the advance calculation of the characteristic quantities of synchronous machines. The method is based on the determination of the frequency response xd(js), xq(js) from primary equivalent circuits with an approximate consideration of the solid rotor part in accordance with the machine geometry. The procedure is explained using a turbogenerator as a practical example. The characteristic values are determined for the standard model with two rotor circuits in each axis and are compared with the results of the short circuit and standstill frequency response tests. - Author(s): R. Itoh and K. Ishizaka
- Source: IEE Proceedings - Electric Power Applications, Volume 141, Issue 1, p. 19 –25
- DOI: 10.1049/ip-epa:19949857
- Type: Article
- + Show details - Hide details
-
p.
19
–25
(7)
The paper presents a novel single-phase, single-way, current-source rectifier. This is based on the cascade combination of a diode bridge rectifier and a current-source Cuk power convertor. The supply current can be sinusoidally waveshaped with suppressed resonance by an appropriate switching strategy, whereas a parallel inductance-capacitance circuit of a conventional form excites the resonant frequency. Furthermore, step-up and step-down characteristics of the output current and near-unity power factor operation can be obtained. To predict steady-state and transient characteristics of the rectifier with a digital PI controller, rigorous and approximate state-space analyses are introduced. The experimental and predicted results confirm the usefulness of the rectifier presented. - Author(s): G. Qishan and H. Shuhong
- Source: IEE Proceedings - Electric Power Applications, Volume 141, Issue 1, p. 27 –32
- DOI: 10.1049/ip-epa:19949863
- Type: Article
- + Show details - Hide details
-
p.
27
–32
(6)
Performance analysis for saturated axial-field induction machines is rather complicated due to their disc-shaped geometry and the saturation effect. A three-dimensional field computation is generally too expensive to predict their performance with engineering accuracy. To obtain the axial-field distribution in the disc-shaped planar airgap, a distributed magnetic circuit model, composed of a set of concentric ring circuit elements, is presented. By using the circuit model and an analytic method, the airgap flux and the axial-force density distributions in axial-field induction machines can be easily determined. Computed results obtained by the method are in excellent agreement with the measured results. Finally, several typical airgap field and axial force density patterns generally existing in axial-field induction machines are given.
Robust low-cost implementation of vector control for reluctance synchronous machines
Eddy current losses of permanent magnet motors
Advance calculation of the characteristic quantities of synchronous machines and comparison with measured values
Single-phase step-up/down current-source rectifier with suppressed resonance
Analytic approach to magnetic circuit for saturated axial-field induction machines
Most viewed content for this Journal
Article
content/journals/ip-epa
Journal
5
Most cited content for this Journal
We currently have no most cited data available for this content.