Review of upcoming changes to global motor efficiency regulations

2009 ◽  
Author(s):  
Robert Boteler ◽  
John Malinowski
Keyword(s):  
Motor Efficiency

scholarly journals Eco-Driving for Different Electric Powertrain Topologies Considering Motor Efficiency

2021 ◽  
Vol 12 (1) ◽  
pp. 6
Author(s):  
Alexander Koch ◽  
Tim Bürchner ◽  
Thomas Herrmann ◽  
Markus Lienkamp
Keyword(s):  
Dynamic Programming ◽  
Electric Vehicles ◽  
Quadratic Functions ◽  
Simultaneous Optimization ◽  
Speed Profile ◽  
Power Demand ◽  
Electric Motors ◽  
Car Following ◽  
Motor Efficiency ◽  
Computationally Expensive

Electrification and automatization may change the environmental impact of vehicles. Current eco-driving approaches for electric vehicles fit the electric power of the motor by quadratic functions and are limited to powertrains with one motor and single-speed transmission or use computationally expensive algorithms. This paper proposes an online nonlinear algorithm, which handles the non-convex power demand of electric motors. Therefore, this algorithm allows the simultaneous optimization of speed profile and powertrain operation for electric vehicles with multiple motors and multiple gears. We compare different powertrain topologies in a free-flow scenario and a car-following scenario. Dynamic Programming validates the proposed algorithm. Optimal speed profiles alter for different powertrain topologies. Powertrains with multiple gears and motors require less energy during eco-driving. Furthermore, the powertrain-dependent correlations between jerk restriction and energy consumption are shown.

The contribution of motor efficiency to drawing performance of older people with and without signs of cognitive decline

2021 ◽  
pp. 1-8
Author(s):  
Maria Chiara Fastame ◽  
Ilaria Mulas ◽  
Valeria Putzu ◽  
Gesuina Asoni ◽  
Daniela Viale ◽  
...  
Keyword(s):  
Older People ◽  
Cognitive Decline ◽  
Motor Efficiency

Effects of Different Attentional Strategies and Practice on Motor Efficiency

1990 ◽  
Vol 71 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Antonio Oña
Keyword(s):  
Reaction Times ◽  
Limited Attention ◽  
Motor Efficiency ◽  
Subject Design ◽  
Preparatory Set ◽  
Actual Movement ◽  
Construct Theory ◽  
Motor Set ◽  
Attentional Strategies ◽  
Attentional Models

The effect of different attentional strategies on motor efficiency, measured by reaction-response time components, has historically been based on memory-drum construct theory, which implied limited attention and motor-response processing. The present study contrasts these principles by using a recording system and automatic analysis of reaction-response parameters. A within-subject design allowed detailed observation of the frequency of each preparatory set within each parameter and with control of the effects of practice. Analysis indicates (a) practice changes the effects of the attentional strategies on the components of reaction response but not the actual movement; (b) the motor-set strategy produces shorter movement times and, inversely, higher motor reaction times; and (c) the motor-sensory set integrated strategy produces improvements on each component of the reaction response. These findings suggest the memory-drum construct theory needs revision and should be based on other attentional models.

Rocket Motor Efficiency: What Performance Can Be Expected of the Motor?

Astronautics ◽  
1937 ◽  
Vol 7 (37) ◽  
pp. 13-16 ◽  
Author(s):  
Alfred Africano
Keyword(s):  
Rocket Motor ◽  
Motor Efficiency

scholarly journals QUANTITATIVE THERMOGRAPHY FOR ELECTIC MOTOR EFFICIENTY DIAGNOSIS

2011 ◽  
Author(s):  
Matt Narrol ◽  
Warren Stiver
Keyword(s):  
Climate Change ◽  
Global Climate Change ◽  
Environmental Sustainability ◽  
Thermal Imaging ◽  
Mechanical Load ◽  
Global Climate ◽  
Electrical Power ◽  
Motor Efficiency ◽  
Power Draw ◽  
Quantitative Thermography

Global climate change is one of the most important challenges and threats to economic, social and environmental sustainability.. Reducing electrical power demand is an important and necessary step in lessening global climate change and preserving our energy resources for future generations. The objective of this work is the development and demonstration of a quantitative thermographic system to rapidly and noninvasively determine in-use electrical motor efficiency. The development has included testing of four motors in a controlled laboratory setting. This setting permits the complete and steady measurement of electrical power draw, mechanical load applied in addition to the thermal imaging. It provides a reliable means to validate the quantitative thermographic system. The thermographic technique proved to be reliable for all motors at 60% or more of full load.

Efficiency Optimization in Speed-Sensorless Control of Induction Motors

2014 ◽  
Vol 672-674 ◽  
pp. 1214-1218
Author(s):  
Hai Fang Yu ◽  
Peng Gao ◽  
Shun Jie Han
Keyword(s):  
Control Strategy ◽  
Induction Motors ◽  
Sensorless Control ◽  
Direct Torque Control ◽  
Torque Control ◽  
Optimal Control Strategy ◽  
Speed Sensorless ◽  
Efficiency Optimization ◽  
Motor Efficiency ◽  
Loss Efficiency

An efficiency optimization model for induction motors with speed-sensorless control is presented in this paper. An mathematical loss model with stator iron loss in DTC(Direct Torque Control) system is used to calculate the motors loss, the loss efficiency and the optimal flux. Additionally, the efficiency optimization control strategy combined with the speed-sensorless model is used to rebuild the simulation modeling. The simulation results with the proposed control strategy show superior effects compared to the traditional control methods. The optimal control strategy can be achieved to improve the motor efficiency.

Sign in / Sign up

Export Citation Format

Share Document