MFC/IMC Control Algorithm for Reduction of Load Torque Disturbance in PMSM Servo Drive Systems

Pietrusewicz, K.; Waszczuk, Paweł; Kubicki, Michał

doi:10.3390/app9010086

Cited by 9 publications

(9 citation statements)

References 15 publications

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“…Permanent magnet synchronous motors (PMSMs) have been widely used in automotive traction drives due to their high performance, efficiency, and power density [1][2][3]. PMSMs should be operated within a specified range of temperature rise without any risk of demagnetization and stator winding failure [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Simplified Thermal Model and Online Temperature Estimation Method of Permanent Magnet Synchronous Motors

Zhu

Xiao

et al. 2019

Applied Sciences

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Monitoring critical temperatures in permanent magnet synchronous motors is crucial for improving working reliability. Aiming at resolving the difficulty in online temperature estimation, an accurate and simple five-node lumped parameter thermal network (LPTN) is proposed and the mathematical model of the LPTN is built. Both radial and axial heat transfer paths inside the motor are considered to model the complete thermal circuit. In addition, an innovative parameter identification method based on multiple linear regression is applied to identify the parameters of the LPTN model. The parameters in the state equation are identified instead of the data of the motor, which are strongly dependent on the material and geometrical parameters. Finally, an open-loop estimation scheme based on the state equation and Kalman filter algorithm is adopted to predict the motor temperature online. The model performances are validated by extensive experiments under varying speed and torque conditions in terms of the accuracy and robustness. The results indicate that the temperature estimation error is within the range of ±5 • C in most cases and the proposed model can quickly follow the load variation. Besides, the online temperature estimation scheme and parameter identification method are easy and convenient to implement in an embedded system, which is feasible in automobile applications. Appl. Sci. 2019, 9, 3158 2 of 18 permanent magnet but also changed the transient resistance of the rotor. If the transient resistance of the rotor can be obtained, the temperature of the rotor can be obtained indirectly. Therefore, when the rotor transient impedance was observed under the condition of high-frequency voltage, the rotor temperature information can be obtained by the relationship between the transient resistance and the temperature [12].However, the above-mentioned methods have some drawbacks. FEM has high estimation accuracy, but this method depends on the motor geometry, material properties, and boundary conditions, resulting in complex calculation and longer computing times. Thus, it can only be used for off-line analysis in the motor temperature field. Although the motor rotor temperature estimation algorithm based on rotor flux linkage is simple and easy to conduct, it is only able to predict the rotor temperature. In addition, the estimation accuracy depends on the observation accuracy of the rotor flux linkage, and the change of the flux linkage caused by temperature is not completely linear. Therefore, it is difficult to obtain a more accurate estimation of the rotor temperature. Compared with the method based on the rotor flux observation, the advantage of the approach based on the high frequency injection is that the change in rotor transient impedance is easier to detect. However, the injected high frequency signal may bring additional rotor loss, causing an increase in temperature.A suitable alternative to monitor motor temperature is lumped parameter thermal networks (LPTNs). This thermal network model is a simplifi...

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Section: Introductionmentioning

confidence: 99%

A Simplified Thermal Model and Online Temperature Estimation Method of Permanent Magnet Synchronous Motors

Zhu

Xiao

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…where ˆ( ) f  and ˆ( ) b  are respectively estimates of the real functions () f  and () b  . In this case, a compensating control law can be so designed (8) that guarantees the fulfillment of the condition (6) and correct operation of the system.…”

Section: Classical Sliding Mode Control Law With Reaching Phasementioning

confidence: 99%

The Positioning of the Electromechanical System Using Sliding Mode Control without a Reaching Phase

Brock¹

2020

Preprint

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Precise and fast position tracking is essential for the correct operation of many industrial robots and CNC machine tools. This subject is also important in the control of the mount of the astronomical telescope, especially for the tracking of artificial satellites. As system parameters can change, a control method that is robust to changes in parameters must be used. Such a method is the sliding control, which, however, ensures the robustness only after reaching the sliding surface. Therefore, a new method was proposed in the paper, which eliminates the phase of reaching the sliding surface. The method consists of using a reference trajectory generator and determining the generalized error in relation to this trajectory. The procedure for designing the control system is presented. Next, the proposed method was verified on the laboratory stand. The described control method provides a robust system operation and can be easily implemented in the control system.

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“…To simplify the analysis, the remaining 5th and 7th harmonics are ignored. By performing the Fourier decomposition on the stator voltage in the stationary coordinate system according to equation (9), the fundamental component of the voltage can be expressed as…”

Section: Derivation and Comparison Of Current Andmentioning

confidence: 99%

“…In order to solve the environmental problem caused by automobile exhaust emissions, vehicle manufacturers have spared no effort to develop new energy vehicles, especially electric vehicles [1]. And among the different motor types, permanent magnet synchronous motors (PMSMs), especially internal PMSMs, have been widely used in electric vehicles and hybrid vehicles, due to their high power density, high efficiency, and small size [2,3], and the design and development of motor controllers for electric vehicles has also been extensively studied [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Suppression of Current Fluctuations and the Brake Torque for PMSM Shutoff in Electric Vehicles

Zhu

et al. 2019

Mathematical Problems in Engineering

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When a safety-related fault in the motor controller is detected, the torque output of the motor cannot be effectively shut off in time and an overcurrent occurs at the moment of switching. The advantages and disadvantages of the open circuit and active short-circuit methods are analyzed. Combining the advantages of these two operations, this paper proposes a new mixed voltage modulation method. It introduces a voltage modulation ratio that represents the duty cycle of the open circuit operation during a PWM period. This ratio is first set to a fixed value and gradually reduced to zero. The inverter is switched at a mixed operation and finally remains in the active short-circuit mode. The current can be quickly converged by a freewheeling diode of open circuit. After switching to active circuit, the brake torque is safety. The effectiveness of this shutoff method was verified by simulations and experiments. It shows that current fluctuations are suppressed and the torque output is also within a safety range. In addition, this shutoff method does not require any additional sensor information and is simple to implement.

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MFC/IMC Control Algorithm for Reduction of Load Torque Disturbance in PMSM Servo Drive Systems

Cited by 9 publications

References 15 publications

A Simplified Thermal Model and Online Temperature Estimation Method of Permanent Magnet Synchronous Motors

A Simplified Thermal Model and Online Temperature Estimation Method of Permanent Magnet Synchronous Motors

The Positioning of the Electromechanical System Using Sliding Mode Control without a Reaching Phase

Suppression of Current Fluctuations and the Brake Torque for PMSM Shutoff in Electric Vehicles

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