POWER SUPPLY ARRANGEMENT OF AN ELEVATOR

• US 20110068629A1
• Filed: 11/08/2010
• Published: 03/24/2011
• Est. Priority Date: 05/20/2008
• Status: Active Grant

• Current Assignee: Kone Corporation
• Original Assignee: Kone Corporation
• Inventors: HYTTI, Pekka, HELVILÄ, Jari, KÄHKIPURO, Matti, TÄHTINEN, Joni
• Granted Patent: US 8,471,403 B2
• Time in Patent Office: Days
• US Class Current: 307/46
• CPC Class Codes: B66B 1/302 for energy saving

Abstract

The invention relates to a power supply arrangement of a transport system. The transport system comprises a motor for moving the transport appliance; a power supply circuit of the transport system, for supplying power between the power source of the transport system and the motor; a power controller of the energy storage, which power controller comprises at least one controllable switch; an energy storage, which is connected to the power supply circuit of the transport system via the power controller of the energy storage; and also a power control, which is fitted to control the aforementioned at least one controllable switch of the power controller of the energy storage, for adjusting at least one electrical magnitude relating to the power supply between the power supply circuit of the transport system and the energy storage. The power controller of the energy storage is fitted to discharge the aforementioned energy storage with a power limitation.

Claims

1. Power supply arrangement of a transport system, which comprises

a motor for moving the transport appliance

a power supply circuit of the transport system, for supplying power between the power source of the transport system and the motor

a power controller of the energy storage, which comprises at least one controllable switch

an energy storage, which is connected via the power controller of the energy storage to the power supply circuit of the transport system

a power control, which is fitted to control the aforementioned at least one controllable switch of the power controller of the energy storage, for adjusting at least one electrical magnitude relating to the power supply between the power supply circuit of the transport system and the energy storage.

wherein the power controller of the energy storage is fitted to discharge the aforementioned energy storage with a power limitation.

2. Power supply arrangement according to claim 1, wherein the aforementioned transport system is an elevator system without counterweight.

3. Power supply arrangement according to claim 1 or 2, wherein the energy storage comprises at least one supercapacitor.

4. Power supply arrangement according to claim 1, wherein the power control is fitted to limit the discharge power of the energy storage to a set limit value (Plim);

and in that the power control is fitted to determine the voltage of the energy storage (UE);

and in that the power control is further fitted to determine the instantaneous limit value (Ilim) for the discharge current of the energy storage on the basis of the quotient

5. Power supply arrangement according to claim 1, wherein the power controller of the energy storage is fitted to precharge the energy storage with a power limitation during a standstill of the transport system, wherein the limit value of the precharging power is fitted to be smaller than the limit value of the discharge power of the energy storage during operation of the transport system.

6. Power supply arrangement according to claim 1, wherein the power supply arrangement comprises a precharging circuit for precharging the energy storage, which precharging circuit comprises at least one controllable switch, for disconnecting the current flowing in the precharging circuit.

7. Power supply arrangement according to claim 1, wherein the power supply circuit of the transport system comprises a frequency converter with intermediate circuit, and in that the power controller of the energy storage is connected to the intermediate circuit of the frequency converter, for supplying power between the intermediate circuit of the frequency converter and the energy storage.

8. Power supply arrangement according to claim 7, wherein the power supply arrangement comprises a precharging circuit for precharging the energy storage, which precharging circuit comprises a transformer connected to the power source of the transport system and also a rectifying bridge, which rectifying bridge is connected to the intermediate circuit of the frequency converter, and in that the precharging current for precharging the energy storage is supplied to the energy storage via the precharging circuit and the power controller of the energy storage.

16. Power supply arrangement according to claim 2, wherein the power control is fitted to limit the discharge power of the energy storage to a set limit value (Plim);

and in that the power control is fitted to determine the voltage of the energy storage (UE);

and in that the power control is further fitted to determine the instantaneous limit value (Ilim) for the discharge current of the energy storage on the basis of the quotient

9. Apparatus for storing energy, and also for discharging stored energy, which apparatus comprises

a power controller of the energy storage, which power controller comprises at least one controllable switch, and which power controller of the energy storage comprises a connection to the power supply circuit of the transport system

an energy storage, which is connected to the power controller of the energy storage

a power control, which is fitted to control the aforementioned at least one controllable switch of the power controller of the energy storage, for adjusting at least one electrical magnitude relating to the power supply between the power supply circuit of the transport system and the energy storage.

wherein the power controller of the energy storage is fitted to discharge the aforementioned energy storage with a power limitation.

10. Apparatus according to claim 9, wherein the energy storage comprises at least one supercapacitor.

11. Apparatus according to claim 9 or 10, wherein the power control is fitted to limit the discharge power of the energy storage to a set limit value (P_lim);

and in that the power control is fitted to determine the voltage (U_E) of the energy storage;

and in that the power control is further fitted to determine the instantaneous limit value (I_lim) for the discharge current of the energy storage on the basis of the quotient

12. Method for supplying power in a transport system, in which method:

the power controller of the energy storage is connected to the power supply circuit of the transport system

at least one electrical magnitude relating to the power supply between the power supply circuit of the transport system and the energy storage is adjusted with a power control

wherein;

the energy storage is discharged with a power limitation.

13. Method according to claim 12, wherein:

at least one supercapacitor is fitted to the energy storage.

14. Method according to claim 12 or 13, wherein:

the discharge power of the energy storage is limited to the set limit value (P_lim)

the voltage (U_E) of the energy storage is determined

the instantaneous limit value (I_lim) for the discharge current of the energy storage is determined on the basis of the quotient

15. Method according to claim 12, wherein

a limit value for the precharging power of the energy storage is determined

a limit value for the charging current of the energy storage is determined

the energy storage is precharged with a power limitation of the precharging power during a standstill of the transport system

the energy storage is charged with a current limitation during operation of the transport system.