Development of Full Speed Range ACC with SiVIC, a virtual platform for ADAS Prototyping, test and evaluation

The paper presents a new method for mode selecting which includes constant torque mode and flux-weakening mode. The proposed method modifies the working modes not by LUT (look-up table), but by the size of T0. Attractive features of this state transition technique include no dependency on the machine parameters, the least calculated quantities, making full use of the source voltage of the battery, and smooth and fast transition into and out of the flux-weakening mode. Simulation results at various operating conditions are presented to verify the feasibility of the proposed mode transition scheme.

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Sensorless Position Estimation for Slotless Surface Mounted Permanent Magnet Synchronous Motors in Full Speed Range

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2019.2908408 ◽

2019 ◽

Vol 34 (12) ◽

pp. 11566-11579 ◽

Cited By ~ 1

Author(s):

Chen Zhao ◽

Marko Tanaskovic ◽

Federico Percacci ◽

Sebastien Mariethoz ◽

Patrik Gnos

Keyword(s):

Permanent Magnet ◽

Position Estimation ◽

Permanent Magnet Synchronous Motors ◽

Synchronous Motors ◽

Speed Range ◽

Full Speed

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Kinematics Measurement and Power Requirements of Fruitflies at Various Flight Speeds

Energies ◽

10.3390/en13164271 ◽

2020 ◽

Vol 13 (16) ◽

pp. 4271

Author(s):

Hao Jie Zhu ◽

Mao Sun

Keyword(s):

The Body ◽

Flight Speed ◽

Specific Power ◽

Flight Performance ◽

Wingbeat Frequency ◽

Body Angle ◽

Flying Insects ◽

Speed Range ◽

Full Speed ◽

Stroke Amplitude

Energy expenditure is a critical characteristic in evaluating the flight performance of flying insects. To investigate how the energy cost of small-sized insects varies with flight speed, we measured the detailed wing and body kinematics in the full speed range of fruitflies and computed the aerodynamic forces and power requirements of the flies. As flight speed increases, the body angle decreases and the stroke plane angle increases; the wingbeat frequency only changes slightly; the geometrical angle of attack in the middle upstroke increases; the stroke amplitude first decreases and then increases. The mechanical power of the fruitflies at all flight speeds is dominated by aerodynamic power (inertial power is very small), and the magnitude of aerodynamic power in upstroke increases significantly at high flight speeds due to the increase of the drag and the flapping velocity of the wing. The specific power (power required for flight divided by insect weigh) changes little when the advance ratio is below about 0.45 and afterwards increases sharply. That is, the specific power varies with flight speed according to a J-shaped curve, unlike those of aircrafts, birds and large-sized insects which vary with flight speed according to a U-shaped curve.

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Back-EMF-Based Sensorless Control Using the Hijacker Algorithm for Full Speed Range of the Motor Drive in Electrified Automobile Systems

IEEE Transactions on Transportation Electrification ◽

10.1109/tte.2015.2426574 ◽

2015 ◽

Vol 1 (2) ◽

pp. 126-137 ◽

Cited By ~ 13

Author(s):

Philip Mike Johnson ◽

Kevin Bai ◽

Xiaofeng Ding

Keyword(s):

Sensorless Control ◽

Motor Drive ◽

Speed Range ◽

Full Speed

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Simultaneous Load Disturbance Estimation and Speed Control for Permanent Magnet Synchronous Motors in Full Speed Range

Applied Sciences ◽

10.3390/app10249006 ◽

2020 ◽

Vol 10 (24) ◽

pp. 9006

Author(s):

Yingming Tian ◽

Yi Chai ◽

Li Feng

Keyword(s):

Permanent Magnet ◽

High Speed ◽

High Efficiency ◽

Weight Ratio ◽

Permanent Magnet Synchronous Motors ◽

Position Information ◽

Synchronous Motors ◽

Speed Range ◽

Combined Control ◽

Full Speed

Permanent magnet synchronous motors (PMSM), which are with the advantages of high torque-to-weight ratio and high efficiency, are widely applied in modern industrial systems. However, existing approaches may fail to accurately track the speed trajectory because of the load disturbances. This paper proposes an equivalent and combined control strategy to mitigate the slow time-varying load disturbances and decrease the overshoot for PMSM in full speed range. First, a state observer is proposed to reconstruct the current variables and speed state in the d-q axis. Hence, one can get the speed and position information without the sensors. Then, the disturbance and the load are estimated by the estimating law. Thus, it can reduce the effect of load and disturbances. Further, the PD control is introduced to weaken the overshoot. As a result, the speed trajectory can be more effectively hold both in high speed and low speed. Finally, numerical examples are presented to demonstrate the validity and effectiveness of the proposed estimation scheme and its robustness under different conditions.

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