A Simple Inverter-Motor System to Improve Energy Consumption and Maximum Torque

2012 ◽  
Author(s):  
Tohru Watanabe ◽  
Yukishige Fujita ◽  
Mikio Totani
Keyword(s):  
Energy Consumption ◽  
High Speed ◽  
Motor System ◽  
Power Lines ◽  
Maximum Torque ◽  
Coil Current ◽  
Ac Motor ◽  
Three Phase ◽  
Constant Strength ◽  
Precise Constant

A new inverter-AC motor system having four power source lines, which can control each coil current independently, is compared to an ordinary inverter-AC motor system using a Y-type coil connection and three power lines. In this paper, three-phase rectangular-type currents are generated by the inverter made of simple ICs. In a previous paper[1], similar comparison experiments were executed using a high-speed DSP board. The board can calculate the three-phase currents to generate a rotating, resultant, magnetic flux with a precise constant strength and phase. It was verified by experiments that an energy consumption of 15% can be saved by using the proposed independent, motor-coil currents. However, it requires high speed and high cost DSP or CPU. In this paper, it is verified by using a new inverter-AC motor system that an energy consumption of 15% can be saved, and also the maximum torque increases 10%.

Research on Energy Consumption Test and Data Process Method of Gravure Printing Machine

2015 ◽  
Vol 738-739 ◽  
pp. 854-857
Author(s):  
Jian Jun Bai ◽  
Yi Ming Wang ◽  
Ying Cai Yuan
Keyword(s):  
Energy Consumption ◽  
Energy Balance ◽  
High Speed ◽  
Electric Energy ◽  
Test Method ◽  
Gravure Printing ◽  
Balance Test ◽  
Data Process ◽  
Three Phase ◽  
Printing Machine

In order to achieve high-speed gravure printing machine energy consumption tested and analyzed process efficiently, put forward a kind of electric energy balance test and analysis method, using power analyzer acquire and record the electric energy balance parameters of motors input ports of the three-phase power supply, and processing the data with the method of successive difference. By means of experiment, tested and analyzed the main motor energy consumption of gravure printing machine, the results verify the feasibility of electric energy balance test method and the method of successive difference.

scholarly journals Trajectory Optimization Algorithm for a 4-DOF Redundant Parallel Robot Based on 12-Phase Sine Jerk Motion Profile

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 80
Author(s):  
Shengqiao Hu ◽  
Huimin Kang ◽  
Hao Tang ◽  
Zhengjie Cui ◽  
Zhicheng Liu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Trajectory Optimization ◽  
High Speed ◽  
Degrees Of Freedom ◽  
Sudden Change ◽  
Parallel Robot ◽  
Joint Space ◽  
Allowable Limit ◽  
Three Phase ◽  
Motion Profile

To improve high motion accuracy and efficiency in the high-speed operation of a 4-DOF (4 degrees of freedom) redundant parallel robot, this paper introduces a trajectory planning of the parallel robot in joint space based on the twelve-phase sine jerk motion profile. The 12-phase sine jerk motion profile utilizes the characteristics of a sine function. Furthermore, the penalty function is used to optimize the trajectory energy consumption under the constraint condition. The simulation and experimental results show that the energy consumption of joint space is slightly higher than that of the three-phase sine jerk motion profile, but the overall operation is more accurate and stable. Specifically, the sudden change of force and velocity in each joint is eliminated, which is the cause of mechanism oscillation. Moreover, the force of each joint is more average. The results indicate that each movement is closer to the maximum allowable limit and the running efficiency is higher.

Proposal of current control method of high-speed AC motor system

2011 ◽  
Vol 176 (1) ◽  
pp. 37-45
Author(s):  
Shinichi Furutani ◽  
Akira Satake
Keyword(s):  
High Speed ◽  
Motor System ◽  
Control Method ◽  
Current Control ◽  
Ac Motor

scholarly journals Assessment of the Energy Consumption and Drivability Performance of an IPMSM-Driven Electric Vehicle Using Different Buried Magnet Arrangements

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1418
Author(s):  
Pedram Asef ◽  
Ramon Bargallo ◽  
Andrew Lapthorn ◽  
Davide Tavernini ◽  
Lingyun Shao ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Permanent Magnet ◽  
High Speed ◽  
Maximum Torque ◽  
Longitudinal Acceleration ◽  
Driving Cycles ◽  
Interior Permanent Magnet ◽  
Maximum Torque Per Ampere ◽  
The Impact

This study investigates the influence of the buried magnet arrangement on the efficiency and drivability performance provided by an on-board interior permanent magnet synchronous machine for a four-wheel-drive electric car with two single-speed on-board powertrains. The relevant motor characteristics, including flux-linkage, inductance, electromagnetic torque, iron loss, total loss, and efficiency, are analyzed for a set of six permanent magnet configurations suitable for the specific machine, which is controlled through maximum-torque-per-ampere and maximum-torque-per-voltage strategies. Moreover, the impact of each magnet arrangement is analyzed in connection with the energy consumption along four driving cycles, as well as the longitudinal acceleration and gradeability performance of the considered vehicle. The simulation results identify the most promising rotor solutions, and show that: (i) the appropriate selection of the rotor configuration is especially important for the driving cycles with substantial high-speed sections; (ii) the magnet arrangement has a major impact on the maximum motor torque below the base speed, and thus on the longitudinal acceleration and gradeability performance; and (iii) the configurations that excel in energy efficiency are among the worst in terms of drivability, and vice versa, i.e., at the vehicle level, the rotor arrangement selection is a trade-off between energy efficiency and longitudinal vehicle dynamics.

Transient Torsional Vibration of Steam Turbine and Generator Shafts due to High Speed Reclosing of Electric Power Lines

1976 ◽  
Vol 98 (3) ◽  
pp. 968-979 ◽  
Author(s):  
A. Hizume
Keyword(s):  
Electric Power ◽  
Steam Turbine ◽  
Torsional Vibration ◽  
High Speed ◽  
Elastic Limit ◽  
Power Lines ◽  
Transient Vibration ◽  
First Approximation ◽  
Three Phase ◽  
Large Response

Transient torsional vibration induced on modern large turbine and generator shafts by high-speed reclosing is investigated qualitatively and quantitatively, assuming linearity and no damping as the first approximation. The effect of repeated impositions is analyzed both for sinusoidal torque fluctuation and for stepwise torque fluctuation. It is shown that the danger of high-speed reclosing is attributable to repetitive imposition (as many as four times); furthermore, the severity of transient vibration is decisively influenced by the timing of repeated impositions. The effect of three-phase high-speed reclosing on a typical 600MW machine is calculated both by computer and by modal analysis. The large response predicted, which is far beyond the elastic limit, is possible to be induced under actually feasible timing. Absolutely safe three-phase high-speed reclosing could not be achieved by strengthening the shaft because the strengthened shaft becomes sensitive to sinusoidal torque fluctuation.

Parameter Sensitivity Study for Optimization of 12Slot-8Pole Three-Phase Wound Field Switched-Flux Machine

2014 ◽  
Vol 695 ◽  
pp. 765-769
Author(s):  
Faisal Khan ◽  
Erwan Sulaiman ◽  
Md Zarafi Ahmad ◽  
Zhafir Aizat
Keyword(s):  
Current Density ◽  
High Speed ◽  
Sensitivity Study ◽  
Parameter Sensitivity ◽  
Design Parameters ◽  
Optimization Approach ◽  
Maximum Torque ◽  
Initial Design ◽  
Three Phase ◽  
Excitation Coil

This paper presents parameter sensitivity study and performance analysis of 12Slot-8Pole three-phase wound field switched-flux machine (WFSFM). The proposed machine consists of 6 armature slots, 6 field-excitation coil (FEC) slots and 8 rotor poles. All active parts such as armature coil and FEC are located on the stator, while the rotor part consists of only single piece iron. This makes the machine becoming more robust and more suitable to be apply for high speed motor drive system applications. The deterministic design optimization approach is used to treat several design parameters defined in rotor, armature and FEC slot area to achieve better results than initial design. 2-D finite element analysis (FEA) is used to study various characteristics of machine. Since the initial design fail to attain the maximum torque and power, therefore the performance of machine is enhanced by refinement of several design parameters. After design refinement, WFSFM has achieved the maximum torque of 22.34 Nm and power of 5.27 kW at maximum field current density, Je of 30 A/mm2 and armature current density, Ja of 30Arms/mm2 which is approximately 3 times the torque and 2 times the power of initial design.

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