WP6-Brochure-E4 brochure - ELA European Lift Association.

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Other manufacturers decided to keep the radial flux design while taking advantage of multipole design and permanent magnets to achieve a very slim and compact machine. Instead of disposing the traction machine elements (sheave, brake, motor, and encoder) along a straight line, which limited its possible reduction in length, in the slim traction machine, developed by Mitsubishi, these elements are disposed radially. The drive sheave is integrated with the rotor which has been given a hollow cylindrical form, allowing the inner surface to be used for an internal expanding double brake. The encoder has been installed within the space inside the brake mechanism [10]. A comparative scheme of a conventional and slim traction machine is shown in Figure 3‐18. Figure 3‐18. Mitsubishi’s Slim traction machine PMSM (source: Mitsubishi) Even with larger sized PMSM machines for high‐rise / high‐speed applications that can no longer fit within the hoistway, the machine room size can be drastically reduced. The overhead machine room no longer has to extend beyond the size of the hoistway. Another option is to place the traction machine and controls in a very small side machine room as show in Figure 3‐19. 30
Figure 3‐19. Possible configurations of lift machine rooms when using PMSM Even though the present asynchronous VVVF gearless technology is very energy efficient, the motor and drive efficiencies are usually less than 90%, for lower powers. Figure 3‐20 shows the much higher efficiency levels of PM motors when compared to induction motors fed by inverters. Figure 3‐20. Comparison of Inverter fed Induction and Permanent Magnet Motor efficiencies (source: Leroy ‐ Somer) The difference is even more noticeable as the speed decreases, as it can be seen in Figure 3‐21. 31
Page 1 and 2: E4 ENERGY EFFICIENT ELEVATORS AND E
Page 3 and 4: Contents 1 Introduction ...........
Page 5 and 6: 1 Introduction Means of vertical tr
Page 7 and 8: 2 Lift and Escalator Technologies T
Page 9 and 10: Figure 2‐3. Configuration of Gear
Page 11 and 12: Some manufacturers have gone even f
Page 13 and 14: • Conventional hydraulic units do
Page 15 and 16: [2] Sachs, H., “Opportunities for
Page 17 and 18: High efficiency motors are typicall
Page 19 and 20: Figure 3‐3. Effect of load on pow
Page 21 and 22: If the linear motor is mounted on t
Page 23 and 24: 3 Phase AC input 50 Hz AC/DC Conver
Page 25 and 26: preventing the car from falling. Ty
Page 27 and 28: Figure 3‐14. Regenerative operati
Page 29: occupied by lift support systems. A
Page 33 and 34: After the introduction of relay log
Page 35 and 36: It is evident that the way lifts ar
Page 37 and 38: When combined with hall call contro
Page 39 and 40: of the torque of the 1:1 roping sch
Page 41 and 42: times as quickly as a 720 mm sheave
Page 43 and 44: LEDs are also a very efficient solu
Page 45 and 46: • Car electronics • Light curta
Page 47 and 48: The major cause of energy consumpti
Page 49 and 50: 3.9 Efficient Escalators and Moving
Page 51 and 52: These bearings feature optimised in
Page 53 and 54: 4 Market Characterisation As part o
Page 55 and 56: Figure 4‐2. Lift Distribution acc
Page 57 and 58: The next three figures show the lif
Page 59 and 60: 5 Results of the Monitoring Campaig
Page 61 and 62: the lift, but does not include addi
Page 63 and 64: Where, E standby Standby Energy use
Page 65 and 66: Figure 5‐4 shows a typical cycle
Page 67 and 68: Figure 5‐6. Travel cycle consumpt
Page 69 and 70: Figure 5‐9. Measured standby powe
Page 71 and 72: Figure 5‐12. Annual Energy consum
Page 73 and 74: Figure 5‐16. Annual Energy consum
Page 75 and 76: Figure 5‐19. Annual electricity c
Page 77 and 78: 6.1.1 Determination of the average
Page 79 and 80: Where, P mech E cycle η system h v
Page 81 and 82:
6.2. Electricity consumption of lif
Page 83 and 84:
6.3. Estimation of potential saving
Page 85 and 86:
The results show that overall savin
Page 87 and 88:
6.5. Estimation of Savings Potentia
Page 89 and 90:
Identification of stakeholders and
Page 91 and 92:
Table 7‐1. Categories of stakehol
Page 93 and 94:
esults were presented and discussed
Page 95 and 96:
We also asked which stakeholder inf
Page 97 and 98:
not rate an item. Reasons for non
Page 99 and 100:
Further barriers We asked responden
Page 101 and 102:
Raising awareness Setting a standar
Page 103 and 104:
Further topics This section address
Page 105 and 106:
The scope of the present study is o
Page 107 and 108:
Table 7‐4. Energy efficiency: Spe
Page 109 and 110:
10 Check system architecture Ropes
Page 111 and 112:
17 Avoid stalled motor door operato
Page 113 and 114:
24 Switch off other lift components
Page 115 and 116:
passenger arrives. However, an addi
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