Extended DQ Transformation for Vectorial Control Applications of Non-sinusoidal Permanent Magnet AC Machines

Oliveira, Azauri Albano de; Monteiro, José Roberto Boffino de Almeida; Aguiar, Manoel Luís de; Gonzaga, D.P.

doi:10.1109/pesc.2005.1581876

Cited by 15 publications

(29 citation statements)

References 4 publications

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“…The problem is further addressed in [36][37][38], in which a modified Park method is proposed. This method uses an on-line estimation of the back-EMF harmonic contents and is used to calculate an angle and amplitude perturbation, which are injected into the phases.…”

Section: Appendix B Bldc Motor Model In the Rotating Reference Framementioning

confidence: 99%

High-Bandwidth Active Impedance Control of the Proprioceptive Actuator Design in Dynamic Compliant Robotics

2019

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Dynamic compliant robotics is a fast growing field because of its ability to widen the scope of robotics. The reason for this is that compliant mechanisms may ensure safe/compliant interactions between a robot and an external element-for instance, a human operator. Active impedance control may widen the scope even further in relation to passive elements, but it requires high-bandwidth robust torque and active impedance control which induces high-noise issues even if high-end sensors are used. To address these issues, a complete controller design scheme, including Field-Oriented Control (FOC) of a Brushless Direct Current (BLDC) motor, is proposed. In this paper, controller designs for controlling the virtual impedance, motor torque and field are proposed which enables high-bandwidth robust control. Additionally, a novel speed and angle observer is proposed that aims to reduce noise arising in the angle sensor (typically a 12-bit magnetic encoder) and a Kalman/Luenberger based torque observer is proposed that aims to reduce noise arising in the phase current sensors. Through experimental tests, the combination of the controller designs and observers facilitated a closed-loop torque bandwidth of 2.6 kHz and a noise reduction of 13.5 dB (in relation to no observers), at a sample rate and Pulse Width Modulation (PWM) frequency of 25 kHz. Additionally, experiments verified a precise and high performing controller scheme both during impacts and at a variety of different virtual compliance characteristics.

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Section: Appendix B Bldc Motor Model In the Rotating Reference Framementioning

confidence: 99%

High-Bandwidth Active Impedance Control of the Proprioceptive Actuator Design in Dynamic Compliant Robotics

2019

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“…The vectorial model for a sinusoidal SM-PMSM is obtained by considering the magnetic fluxes linked with a stator phase and rotor magnets, given by (17) and applying dq transformation (16) to (1) and (3), which is equivalent to (10) with a x ¼ 1 and u x ¼ 0. Considering the dq axes angle ( Figure 5) equal to rotor angle (u r ), equations (18)-(21) are obtained.…”

Section: Sinusoidal Machine Vectorial Modelmentioning

confidence: 99%

“…This model has already been shown in a short form in Refs. [16,17], but here, it is shown in details together with the results of its practical implementation as well as of its simulation.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic torque ripple and copper losses reduction in permanent magnet synchronous machines

Monteiro

Oliveira

Aguiar

et al. 2011

Int Trans Elec Energy Syst

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SUMMARY This paper presents a method for electromagnetic torque ripple and copper losses reduction in (non‐sinusoidal or trapezoidal) surface‐mount permanent magnet synchronous machines (SM‐PMSM). The method is based on an extension of classical dq transformation that makes it possible to write a vectorial model for this kind of machine (with a non‐sinusoidal back‐EMF waveform). This model is obtained by the application of that transformation in the classical machine per‐phase model. That transformation can be applied to machines that have any type of back‐EMF waveform, and not only trapezoidal or square‐wave back‐EMF waveforms. Implementation results are shown for an electrical converter, using the proposed vectorial model, feeding a non‐sinusoidal synchronous machine (brushless DC motor). They show that the use of this vectorial mode is a way to achieve improvements in the performance of this kind of machine, considering the electromagnetic torque ripple and copper losses, if compared to a drive system that employs a classical six‐step mode as a converter. Copyright © 2011 John Wiley & Sons, Ltd.

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“…Considering the inverter operation, stator voltages are expressed in relation with the DC voltage (V DC ) as in (7).…”

Section: Inverter Modelingmentioning

confidence: 99%

“…We consider a power conservative to define three duty cycles in the Park frame (α d , α q , α h ). Those duty cycles permit an use of the inverter similar to the classical one in the (abc) frame (7). Output voltages in the Park frame are defined in (10).…”

Section: Inverter Modelingmentioning

confidence: 99%

Analytical modeling of the input admittance of an electric drive for stability analysis purposes

Girinon

Baumann

Piquet

et al. 2009

Eur. Phys. J. Appl. Phys.

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of the input admittance of an electric drive for stability analysis purposes.Abstract. Embedded electric HVDC distribution network are facing difficult issues on quality and stability concerns. In order to help to resolve those problems, this paper proposes to develop an analytical model of an electric drive. This self-contained model includes an inverter, its regulation loops and the PMSM. After comparing the model with its equivalent (abc) full model, the study focuses on frequency analysis. The association with an input filter helps in expressing stability of the whole assembly by means of Routh-Hurtwitz criterion.

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Extended DQ Transformation for Vectorial Control Applications of Non-sinusoidal Permanent Magnet AC Machines

Cited by 15 publications

References 4 publications

High-Bandwidth Active Impedance Control of the Proprioceptive Actuator Design in Dynamic Compliant Robotics

High-Bandwidth Active Impedance Control of the Proprioceptive Actuator Design in Dynamic Compliant Robotics

Electromagnetic torque ripple and copper losses reduction in permanent magnet synchronous machines

Analytical modeling of the input admittance of an electric drive for stability analysis purposes

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