Actual measurement on regenerative elevator drive and energy saving benefits

Lin, Kun-Yu; Lian, Kuang‐Yow

doi:10.1109/cacs.2017.8284249

Cited by 10 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation 8 shows the rising and falling slope of the inductor current in the boost converter; where m is the slope of the rising inductor current, is the slope of the falling inductor current, is the input voltage, is the output voltage, and is the value of the boost converter inductor. Therefore, if Equations (4) and (5) are summarized, the relationship between m 2 and m a in the falling current period is expressed by Equation 6:…”

Section: Problems With the Slope Compensation Methodsmentioning

confidence: 99%

“…As research into regenerative braking becomes more active, the importance of fast storage of electric energy is increasing. Due to long charging and discharging cycles and a long lifetime, super capacitors are being increasingly used instead of batteries in many applications [5][6][7]. For energy storage system applications that use super capacitors, a voltage controller with quick response characteristics is required for fast charging of the super capacitor.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Hybrid Current Mode Controller with Fast Response Characteristics for Super Capacitor Applications

Kim

et al. 2019

Electronics

View full text Add to dashboard Cite

A wide-bandwidth current-controller is required for the fast charging and discharging of applications containing super capacitors. To accomplish this, peak current mode is generally used due to the speed of its response characteristics. On the other hand, peak current mode control must be provided with a slope compensation function to restrain sub-harmonic oscillations. However, if the controlled output voltage is varied, the slope must be changed accordingly. Nonetheless, it is not easy to change the slope for every change in output voltage. Another solution involves the slope being set at the maximum value, which results in a slow response. Therefore, in this paper, a hybrid mode controller was proposed that uses a peak current and a newly-specified valley current. Using the proposed hybrid mode control, sub-harmonic oscillation did not occur for duty cycles larger than 0.5 and response times were fast.

show abstract

Section: Problems With the Slope Compensation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Hybrid Current Mode Controller with Fast Response Characteristics for Super Capacitor Applications

Kim

et al. 2019

Electronics

View full text Add to dashboard Cite

show abstract

“…AC gearless motor machines are used in more elevators today despite that they are more expensive. This is because they have higher overall efficiency and may be utilized for a greater amount of time [5,7,8] .…”

Section: Geared and Gearless Motorsmentioning

confidence: 99%

“…The elevator uses brakes to maintain its rated speed when the elevator car is loaded less than or more than 50% of its maximum capacity (cars moving up are light or heavy, respectively). When applying breaks, the AC motor functions as an energy generator by converting mechanical "heat" energy into electrical energy and channeling it back into the facility's electrical grid [7,10] . Further, because there is no longer a requirement to cool equipment that is subjected to the excessive heat generated by traditional motors, this results in an extra reduction in the amount of energy consumed (Figure 2).…”

Section: Regenerative Drivesmentioning

confidence: 99%

Smart Elevator Systems

Al‐Kodmany

2023

j. of mech. mater. and mech. res.

View full text Add to dashboard Cite

Effective vertical mobility is a crucial element in the design and construction of tall buildings. This paper reviews recent “smart” developments in elevator technologies and analyzes how they affect the construction and operation of tall buildings. In an approachable and non-technical discourse, it maps out, arranges, and compiles complicated and dispersed information on various elements of elevator design. It discusses hardware-based machinery, such as AC and gearless motors, machine-room-less (MRL) elevators, regenerative drives, elevator ropes, and LED lighting, as well as software-based solutions, such as destination dispatching systems, people flow solutions, standby mode, and predictive maintenance applications. Future vertical transportation models are also discussed, including multi-directional elevators, and circulating multi-car elevators. Lastly, the paper suggests fruitful avenues for further studies on the subject, such as robotics, 3D printing, and the impact of COVID-19 pandemic on elevator design.

show abstract

“…For example, Black et al (2012) and Christiansen et al (2015) characterized MELs use in hospitals; Roth et al (2014) and Urban et al (2017) studied a variety of consumer electronics; Goetzler et al (2013) studied electric motors; and Bush et al (2009) and ENERGY STAR (2011) characterized coffeemakers. Additionally, substantial reductions in the energy consumption of many MELs through applications of new technologies have been identified, including set-top boxes (Lee and Yun, 2011), office equipment (Choi et al, 2015), wireless access infrastructure (Gomez et al, 2013), and elevators (Lin and Lian, 2017).…”

Section: Early Field Measurements Of Melsmentioning

confidence: 99%

Miscellaneous electric loads: Characterization and energy savings potential

Butzbaugh

Hosbach

Meier

2021

Energy and Buildings

View full text Add to dashboard Cite

Over time, miscellaneous electric loads (MELs) are expected to increase both in magnitude and share of residential and commercial building energy consumption. This trend is most apparent in North America, but it is also occurring in Japan and Europe. However, the contribution of MELs to building energy use is not currently well understood, both because the products in this category are transforming rapidly and the definition and classification of MELs is ambiguous. This study estimated the national energy consumption of 36 MELs using bestavailable data and found them to comprise 12% of delivered electricity to the U.S. residential and commercial building sectors. If 26 of these MELs were replaced with the most energyefficient product models available on the market, their energy consumption could be halved to 6% of delivered electricity. National energy models will better account for building energy consumption by incorporating the MELs data collected and analyzed for this study, leading to improved policy decisions.Keywords: miscellaneous electric loads; U.S. national energy consumption; energy savings potential; buildings; end uses; forecast 1. Introduction Substantial energy efficiency improvements have been made in the equipment associated with the major electricity end uses, such as refrigerators, heating and cooling systems, and lighting. The result has been a leveling, and sometimes even a decline, in building energy use in many developed countries (EIA, 2019a; IEA, 2018). Further reductions are envisioned (as shown by different scenarios in Figure 1). However, reductions in total building energy consumption are limited (if not altogether eliminated) by a growth in energy consumption from oftenuncategorized equipment that is not considered a major end use. This collection of uncategorized equipment, which is often labelled "miscellaneous electric loads (MELs)" among other names ("Other" in Figure 1), is therefore of rising importance in energy policy. What activities and devices comprise it? Is it growing or shrinking? What technologies can be applied to reduce the

show abstract

Actual measurement on regenerative elevator drive and energy saving benefits

Cited by 10 publications

References 0 publications

A Hybrid Current Mode Controller with Fast Response Characteristics for Super Capacitor Applications

A Hybrid Current Mode Controller with Fast Response Characteristics for Super Capacitor Applications

Smart Elevator Systems

Miscellaneous electric loads: Characterization and energy savings potential

Contact Info

Product

Resources

About