New Sensorless Vector Control Methods Based on a New Minimum-Order Flux State-Observer in the "D-Module" for Permanent Magnet Synchronous Motors

Shinnaka, Shinji

doi:10.1541/ieejias.123.1446

Cited by 33 publications

(47 citation statements)

References 15 publications

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“…(13) is the extended flux ψ e . A minimum order rotor flux position state observer based on the extended flux model is proposed in [15]. By chaning the coordinate system of Equ.…”

Section: B Actual Stator Flux Trajectory Observationmentioning

confidence: 99%

See 1 more Smart Citation

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Fang¹,

Lin²,

Yang³

2016

Journal of Power Electronics

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Central 60° synchronous modulation is an easy pulse-width modulation (PWM) method to implement for the traction inverters of urban rail trains at a very low switching frequency. Unfortunately, its switching patterns are determined by a Fourier analysis of assumed steady-state voltages. As a result, its transient responses are not very good with over-currents and high instantaneous torque pulses. In the proposed solution, the switching patterns of the conventional central 60° modulation are modified according to the dynamic error between the target and actual stator flux. Then, the specific trajectory of the stator flux and current vector can be guaranteed, which leads to better system transients. In addition, stator flux control is introduced to get smooth mode switching between the central 60° modulation and the other PWMs in this paper. A detailed flow chart of the control signal transmission is given. The target flux is obtained by an integral of the target voltage. The actual PMSM flux is estimated by a minimum order flux state observer based on the extended flux model. Based on a two-level inverter model, improved rules in the α-β stationary coordinate system and equations of the switching patterns amendment are proposed. The proposed method is verified by simulation and experimental results.

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“…(13) is the extended flux ψ e . A minimum order rotor flux position state observer based on the extended flux model is proposed in [15]. By chaning the coordinate system of Equ.…”

Section: B Actual Stator Flux Trajectory Observationmentioning

confidence: 99%

“…The main calculation process is expressed by Equ. (15). -ρ is the pole of the observation error equation, and I is the unit matrix.…”

Section: B Actual Stator Flux Trajectory Observationmentioning

confidence: 99%

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Fang¹,

Lin²,

Yang³

2016

Journal of Power Electronics

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“…However, position sensors for detection of this signal decrease reliability and restrict the environment for installation. Therefore, position sensorless control has been required, and various strategies have been proposed so far (1)- (4) . The maximum torque per ampere (MTPA) control, which optimizes the overall torque including the reluctance torque, is often utilized as the most efficient drive of IPMSMs.…”

Section: Introductionmentioning

confidence: 99%

Position Sensorless Control of IPMSMs using Full-Order Flux Observer Based on an Algebraic Design Method

et al. 2013

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In this paper, a position sensorless control method for IPMSMs using a full-order observer based on an algebraic design is proposed. The full-order observer is well known to be one of the powerful estimators for sensorless control of AC motors, for which design strategies have already been discussed. Although many numerical design and heuristic design approaches have been proposed so far, the design formulation for improving robustness with respect to mismatches in some parameters, however, is now an open problem. First, the proposed flux model for position sensorless control of IPMSMs has been reviewed, in which this model can approximately estimate the maximum torque control (MTC) frame, which stands for a new coordinate aligned with the current vector at the MTPA control. Next, an algebraic design of the full-order observer based on the proposed flux model has been proposed. In this paper, a design guideline to suppress the sensitivity of the speed estimation error has also been proposed. Finally, some experimental results demonstrate the effectiveness of the proposed method.

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“…The phase estimation methods for the low and medium to high speed range, using the fundamental wave components of the driving voltage and current, can be in turn divided into three groups in terms of the directly estimated object and the estimation principle, namely, (1) methods that estimate the rotor flux using a second-order (minimum order) or fourth-order (full order) observer, and then extract the rotor phase information contained in the estimate [3][4][5][6][7][8]; (2) methods that estimate the voltage (EMF) induced via the rotor flux using a state observer or a disturbance observer, and then extract the rotor phase infor-mation contained in the estimate [9][10][11]; and (3) methods that estimate the extended EMF using a disturbance observer, and then extract the rotor phase information contained in the estimate [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…As regards rotor phase estimation using a D-module state observer (minimum order magnetic-flux state observer), it is known that the robustness of rotor phase estimation to noise and disturbances can be improved if the observer's convergence characteristic is adjusted to the speed variation (speed-varying characteristic) [3]. In extended EMF estimation using a disturbance observer, too, a speed-varying characteristic is helpful in suppressing high-frequency components (see Note 1 at the end of this section) [12].…”

Section: Introductionmentioning

confidence: 99%

A new sensorless vector control method using high‐order filters with speed‐varying bandwidth for permanent magnet synchronous motors

Shinnaka¹

2010

Elect Comm in Japan

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SUMMARYThis paper proposes a new rotor phase estimation method for sensorless drive of permanent-magnet synchronous motors (PMSMs), which uses the motor-driving stator voltage and current information for estimation. The proposed estimation method utilizes two high-order low-pass filters that can change their bandwidth according to the speed estimate. The high-order filters are potentially able to attenuate sufficiently the harmonics contaminating the stator voltage and current and to produce an almost puresinusoidal rotor flux estimate consisting of only the fundamental component. Such a sinusoidal rotor flux estimate allows highly accurate estimation of the rotor phase even at very low speed. In order to separate the fundamental component of the rotor flux estimate from its harmonics with no phase lag/lead in variable-speed environments, the proposed low-pass filters have the capability to change the bandwidth adaptively to the rotor speed. The sensorless drive system using the proposed phase estimation method has several strong capabilities: (1) it can start up PMSMs from standstill at the rated load; (2) it can drive PMSMs stably even at very low speed, such as 1/60 of the rated speed under the rated motoring/regenerating load; (3) it can drive PMSMs accompanied with an inertial load factor of over 50. The proposed estimation method is simple and easily installed into sensorless drive systems. This paper presents the new estimation method in detail and shows how it is installed into the drive systems by using a concrete example. The usefulness of the method and the performance of the drive system are examined and confirmed through extensive experiments.

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New Sensorless Vector Control Methods Based on a New Minimum-Order Flux State-Observer in the "D-Module" for Permanent Magnet Synchronous Motors

Cited by 33 publications

References 15 publications

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

An Improved Central 60° Synchronous Modulation for High Transient Performance with PMSM Stator Flux Control Used in Urban Rail Transit Systems

Position Sensorless Control of IPMSMs using Full-Order Flux Observer Based on an Algebraic Design Method

A new sensorless vector control method using high‐order filters with speed‐varying bandwidth for permanent magnet synchronous motors

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