Evaluation and Modeling of Rotor Position Sensor Characteristics for Electric Traction Motors

2016 ◽  
Author(s):  
Jens Gaechter ◽  
Mario Hirz
Keyword(s):  
Position Sensor ◽  
Rotor Position ◽  
Traction Motors ◽  
Electric Traction

scholarly journals Benchmark of Rotor Position Sensor Technologies for Application in Automotive Electric Drive Trains

Electronics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1063 ◽  
Author(s):  
Christoph Datlinger ◽  
Mario Hirz
Keyword(s):  
Evaluation Criteria ◽  
Position Sensor ◽  
Permanent Magnet Synchronous Machines ◽  
Rotor Position ◽  
Powertrain Control ◽  
Alternative Technologies ◽  
Traction Motors ◽  
Drive Trains ◽  
Automotive Powertrain ◽  
Electric Powertrains

Rotor shaft position sensors are required to ensure the efficient and reliable control of Permanent Magnet Synchronous Machines (PMSM), which are often applied as traction motors in electrified automotive powertrains. In general, various sensor principles are available, e.g., resolvers and inductive- or magnetoresistive sensors. Each technology is characterized by strengths and weaknesses in terms of measurement accuracy, space demands, disturbing factors and costs, etc. Since the most frequently applied technology, the resolver, shows some weaknesses and is relatively costly, alternative technologies have been introduced during the past years. This paper investigates state-of-the-art position sensor technologies and compares their potentials for use in PMSM in automotive powertrain systems. The corresponding evaluation criteria are defined according to the typical requirements of automotive electric powertrains, and include the provided sensor accuracy under the influence of mechanical tolerances and deviations, integration size, and different electrical- and signal processing-related parameters. The study presents a mapping of the potentials of different rotor position sensor technologies with the target to support the selection of suitable sensor technologies for specified powertrain control applications, addressing both system design and components development.

Research and Develop on Static Frequency Converter of Pumped Storage Power Plant

2012 ◽  
Vol 608-609 ◽  
pp. 1120-1126 ◽  
Author(s):  
De Shun Wang ◽  
Bo Yang ◽  
Lian Tao Ji
Keyword(s):  
Power Plant ◽  
Control Strategy ◽  
Large Scale ◽  
Frequency Converter ◽  
Position Estimation ◽  
Position Sensor ◽  
Storage Unit ◽  
Rotor Position ◽  
Start Up ◽  
Pumped Storage

A static frequency converter start-up control strategy for pumped-storage power unit is presented. And rotor position detecting without position sensor is realized according to voltage and magnetism equations of ideal synchronous motor mathematics model. The mechanism and implementation method of initial rotor position determination and rotor position estimation under low frequency without position sensor are expounded and validated by simulations. Based on the mentioned control strategy, first set of a static frequency converter start-up device in China for large-scale pumped-storage unit is developed, which is applied to start-up control test in the 90 MW generator/motor of Panjiakou Pumped-storage Power Plant. Test results show that rotor position detecting, pulse commutation, natural commutation, and unit synchronous procedure control of static start-up are all proved. The outcomes have been applied in running equipment, which proves the feasibility of mentioned method.

Fault Tolerant and Nano Displacement Drive Control Method of Photoelectric Motor for Battery Electric Vehicle

2021 ◽  
Vol 16 (2) ◽  
pp. 293-302
Author(s):  
Weiping Liu ◽  
Zhaofeng Wang ◽  
Ximing Zhang ◽  
Yulin Wang ◽  
Bochun Hu ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Control Method ◽  
Displacement Sensor ◽  
Battery Electric Vehicle ◽  
Position Sensor ◽  
Low Resolution ◽  
Rotor Position ◽  
Displacement Sensors ◽  
Position Signal ◽  
Three Phase

The low-resolution photoelectric position sensor is used, that is, Hall position sensor replaces the traditional photoelectric encoder and other high-resolution position sensors to monitor the rotor position. However, because the three-phase Hall position sensor can only output six position signals, a hardware circuit design of low-resolution position sensor monitoring rotor position signal is proposed. Meanwhile, nanotechnology has been introduced in the study of micro drive of battery electric vehicle (BEV). BEV driver has some disadvantages such as hysteresis, creep and nonlinearity, which seriously affects its application in nano environment. A nano displacement sensor is designed for the characteristics of BEV driver. The nonlinear problem of micro driver is solved through the closed-loop control of position feedback. In the test, through the verification of rotor position and current waveform, it can be proved that the method based on photoelectric position sensor and rotor position signal monitoring can ensure the low deviation of rotor position calculation and correct output signal of three-phase photoelectric position sensor. The decoupling performance of vector control is verified by 3/2 transformation. In the displacement detection of micro driver, the designed nano displacement sensor has higher resolution and its performance is better than that of the previous three generations of displacement sensors.

Shaft Design for Electric Traction Motors

2018 ◽  
Vol 4 (3) ◽  
pp. 720-731 ◽  
Author(s):  
Jianbin Liang ◽  
James Weisheng Jiang ◽  
Berker Bilgin ◽  
Ali Emadi
Keyword(s):  
Traction Motors ◽  
Electric Traction

scholarly journals An Extended Approach for Validation and Optimization of Position Sensor Signal Processing in Electric Drive Trains

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 77 ◽  
Author(s):  
Christoph Datlinger ◽  
Mario Hirz
Keyword(s):  
Data Processing ◽  
Electric Drive ◽  
Reference System ◽  
Test Bench ◽  
Position Angle ◽  
Drive Train ◽  
Position Sensor ◽  
Sensor Systems ◽  
Rotor Position ◽  
Rotor Shaft

Due to the increasing electrification of automotive drive train systems, accurate position and speed sensors play an important role to achieve an optimum drive train performance and driving range. These sensor systems determine the rotor shaft position to deliver exact data for efficient drive train control. The system itself must be reliable, sufficiently accurate and cost efficient at the same time. In this way, the design process of the sensor system is influenced by a trade-off, which influences the system performance in view of different parameters, e.g., resolution and data processing accuracy. The focus of the present work is to introduce a method for benchmarking the performance of not only the rotor shaft position sensor, but the whole electric drive train sensor systems by use of a highly accurate reference system on a specifically developed test bench. To achieve a significant benchmark statement by determination of the rotor position angle error, the independent measuring systems, the automotive drive train system and the reference system are synchronized by the use of a common trigger/clock signal. The mentioned signal defines the time steps of the system under test rotor position angle capturing procedure and those of the reference system simultaneously. This enables a common time-base for two independent working measurement systems. This publication provides information about a concept for enhanced rotor position sensor evaluation that enables the merging of real-time data processing with test bench measurement. This procedure provides an important basis for the selection and optimization of position sensor systems for sophisticated electric powertrains.

Research on the Claw Pole Machine with Outer PM Rotor Driven by Trapezoidal Current

2012 ◽  
Vol 588-589 ◽  
pp. 530-533
Author(s):  
Feng Ge Zhang ◽  
Jin Xiang Gao ◽  
Guang Wei Liu
Keyword(s):  
Permanent Magnet ◽  
Special Kind ◽  
Current Drive ◽  
Operating Mechanism ◽  
Position Sensor ◽  
Rotor Position ◽  
Material Characteristics ◽  
Static Performance

The claw pole machine with outer permanent magnet rotor (CPMPM) is a special kind of the claw pole machine. The trapezoidal current drive as a new drive in this motor is a new attempt. On the basis of analyzing its structure, material, characteristics and operating mechanism have proposed a new conduction manner of the trapezoidal current drive；For this machine is not easy to place position sensor, a new function of rotor position-based approach has been put forward to estimate the rotor position in this paper. It has been show that this method can accurately and quickly estimate the rotor position by simulation .It has been prove that this method has good dynamic and static performance.

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