JP2002338150A - Elevator car power supply - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a power supply device for an elevator car capable of reliably supplying power to the car. SOLUTION: Power supply means 51, 52 installed on the building side and outputting a current of a predetermined frequency, power supply lines 51a, 51b connected to the power supply means 51 and extending into the hoistway 1, and connected to the power supply means 52 And the feeder lines 52a, 52b extending in the hoistway 1 in parallel with the feeder lines 51a, 51b, and the car 1 facing the feeder lines 51a, 51b, 52a, 52b.
1, an iron core 61a, a coil 61b wound around the iron core 61a, and an inverter 61f for converting an electromotive force generated in the coil 61 into a predetermined voltage, and an abnormality occurs in one of the power supply means or the power supply line. Even so, the power required for operating the car is secured via the other power supply means and the power supply line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an elevator car, and more particularly to a power supply device for an elevator car suitable for supplying electric power to the car in a non-contact manner.

[0002]

2. Description of the Related Art A power supply device for supplying power to a moving body traveling along a traveling path in a non-contact manner includes a power supply means for outputting a current of a predetermined frequency, and a power supply means connected to the power supply means and extending in the traveling path. An exciting line, i.e., a power supply line, a coil provided on the moving body side facing the power supply line, and a converter for converting an electromotive force generated in the coil by an electromagnetic induction action into a predetermined voltage. .

When such a power supply device is used in an elevator car, the maximum value of power that can be received by the car side depends on the voltage value of the power supply means and the inductance of the power supply line, that is, the length of the power supply line. It is determined. In general, depending on various conditions, the length of the hoistway that can supply the required power of the car based on the voltage value of the power supply means is about 100 m. Therefore, conventionally, when power is supplied to an elevator car having a hoistway length of 100 m or more, a plurality of power supply means and a plurality of power supply lines are provided.

Incidentally, as this kind, there is a special opening and closing 9-9.
No. 3841 can be mentioned.

[0005]

By the way, the above-mentioned conventional power supply device is provided with a plurality of power supply means and a plurality of power supply lines in order to supply electric power to a car of a super-stroke elevator having a hoistway length exceeding 100 m. However, no consideration is given to backup of a failure that may occur in these power supply means and the power supply line. Therefore, for example, if a failure occurs in one of the power supply means, power cannot be supplied to the car in the section of the power supply line supplied by the power supply means. And passengers will be trapped in the car.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to provide an elevator car power supply device capable of reliably supplying power to the car.

[0007]

In order to achieve this object, the present invention provides a power supply means installed on a building side for outputting a current of a predetermined frequency, and connected to the power supply means and extended into a hoistway. A power supply line, an iron core provided on the car side facing the power supply line, and a coil wound around the iron core,
A power converter for converting an electromotive force induced in the coil into a predetermined voltage, the power supply device for an elevator car, comprising a plurality of the power supply means and the plurality of power supply lines, and these power supply lines are provided in a hoistway. A configuration is provided in which in-phase means is provided to extend in parallel to face the iron core and make the phase of the current supplied to the power supply line the same.

According to the present invention having the above-described structure, in-phase current is supplied from the respective power supply means to the respective feeder lines extending in parallel in the hoistway via the in-phase means. The electromotive force induced in the coil moving in opposition is converted into a predetermined voltage by a converter to obtain the power of the car. Then, when an abnormality occurs in one of the power supply means or the power supply line, the electromotive force induced in the coil is reduced by half, but the power required for operating the car is secured via the other power supply means and the power supply line. Thereby, electric power can be reliably supplied to the car.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a power supply device for an elevator car according to the present invention, and FIG. 2 is an electric circuit diagram of the power supply device of FIG.

As shown in FIG. 1, the elevator generally has a car 11 which moves up and down in a hoistway 1, a main rope 12 having one end connected to the car 11, and an other end connected to the other end of the main rope 12. , Counterweight 1 to go up and down in hoistway 1
3 and a sheave 2 around which the middle part of the main rope 12 is wound
1 and an electric motor 22 for applying a driving force to the sheave 21
And a control device 23 for controlling the electric motor 22.

The power supply device according to the present embodiment includes a power supply means 51 installed on the building side and outputting a current of a predetermined frequency.
52, a forward feed line 51a and a return feed line 51b connected to the power supply means 51 and extended into the hoistway 1.
And a forward-side power supply line 52a and a return-side power supply line 52b that are connected to the power supply means 52 and extend into the hoistway 1 in parallel with the forward-side power supply line 51a and the return-side power supply line 51b. An iron core 61a mounted on the car 11 via mounting hardware 61d in opposition to 51a, 51b, 52a, 52b, and a coil 61 wound around the iron core 61a.
b and an output line 61 having one end connected to the coil 61b.
c is connected to the other end of the output line 61c.
b, a converter for converting the rectified electromotive force into a predetermined voltage, for example, an inverter 61f, and a detector for detecting a voltage generated in the coil 61b by the electromagnetic induction effect. 61 g. The load 14 including a car lighting, a door drive, a signal power supply, and the like (not shown) provided in the car 11 is connected to the inverter 61f. The power supply lines 51a and 51b connected to the power supply means 51 and the power supply lines 52a and 52b connected to the power supply means 52 have the same length, respectively, and the upper part of the hoistway 1 and the hoistway 1 Supports 15a and 15 respectively installed at the lower part
b.

The above-mentioned power supply means 51 and 52 are
As shown in the figure, AC power supplies 51c, 52c and rectifier circuits 51d, 5d connected to these AC power supplies 51c, 52c.
2d, inverter circuits 51e and 52e connected to the rectifier circuits 51d and 52d, and a pulse generator 53 for outputting a pulse signal to the inverter circuits 51e and 52e. Then, the inverter circuit 51e
Are connected to the power supply lines 51a and 51b, and the power supply lines 52a and 52b are connected to the inverter circuit 52e.

Further, power supply lines 51a, 51b, 52a,
The in-phase means for making the phase of the current supplied to 52b in-phase includes, for example, a pulse generator 53. That is, since the coil 61b obtains the maximum electromotive force by the addition current of the currents flowing through the power supply lines 51a and 52a,
It is necessary to make the phases of the currents in-phase.
The power supply lines 51a and 51b connected to the power supply means 52 and the power supply lines 52a and 52b connected to the power supply means 52 have the same length. Simultaneous output produces in-phase voltages in the power supply means 51, 52,
In response, the power supply lines 51a and 52a obtain a current in phase.

In this embodiment, first, the pulse generators of the power supply means 51 and 52 are connected to inverter circuits 51e and 51e.
Simultaneous output of the pulse signal to 52e generates an in-phase voltage, and accordingly, the phases of the currents supplied to the feed lines 51a and 52a become in-phase. And the feed line 51
When the coil 61b faces the a and 52a, an electromotive force is generated by an electromagnetic induction action, and the electromotive force is
In addition to rectification by e, the voltage is converted to a predetermined voltage by the inverter 61f and supplied to the load.

If an abnormality occurs in one of the power supply means 51 and current is not supplied to the power supply lines 51a and 51b, the electromotive force induced in the coil 61b is reduced by half.
The power required for operating the car 11 is secured via the other power supply means 52 and the power supply lines 52a and 52b, and the load 14
Supplied to That is, by setting such that the power required for the operation of the car 11 such as the door drive and the signal power supply can be secured even with the reduced electromotive force, the car 11 can be operated even if one of the power supply means 51 has an abnormality. It is possible to travel to the destination floor and open the door, thereby preventing a trap failure in which passengers are trapped in the car 11. Thereafter, the detector 61
g, the voltage generated in the coil 61b is detected to recognize that an abnormality has occurred in the power supply means 51.
1 prevents it from restarting.

In the embodiment configured as described above, even if an abnormality occurs in one of the power supply means or the power supply line, the power required for operating the car 11 is secured via the other power supply means and the power supply line. As a result, the electric power can be reliably supplied to the car 11, thereby preventing a confinement failure in which passengers are confined in the car 11.

FIG. 3 is a perspective view showing another embodiment of the power supply line provided in the power supply device for an elevator car according to the present invention. The same components as those shown in FIG. 1 are denoted by the same reference numerals.

In the embodiment shown in FIG. 1 described above, an example is shown in which two power supply lines 51a and 51b and two power supply lines 52a and 52b are provided. However, the present invention is not limited to this.
As shown in the figure, power supply lines 51a, 51b, power supply lines 52a, 5
2b and three feed lines 53a and 53b may be provided so as to be applicable to a super-stroke elevator.

FIG. 4 is a plan view showing another embodiment of the iron core provided in the power supply device for an elevator car according to the present invention. The same components as those shown in FIG. 1 are denoted by the same reference numerals.

In the embodiment shown in FIG. 1 described above, an example is shown in which an iron core 61a having a substantially E-shaped cross section is provided. However, the present invention is not limited to this. For example, as shown in FIG. By providing the coil 62b around the ring portion and arranging the feeder lines 51a and 52a in the through holes, the power receiving efficiency can be further increased as compared with the E-shaped core 62a.

[0022]

According to the present invention, a plurality of power supply means and power supply lines are provided. Even if an abnormality occurs in one power supply means or power supply line, the power supply means and power supply line are connected to each other. By ensuring that the power required to operate the car can be secured, power can be reliably supplied to the car,
This has the effect of preventing a confinement failure in which passengers are confined in the car.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an embodiment of a power supply device for an elevator car according to the present invention.

FIG. 2 is an electric circuit diagram of the power supply device of FIG.

FIG. 3 is a perspective view showing another embodiment of the power supply line provided in the power supply device for an elevator car of the present invention.

FIG. 4 is a plan view showing another embodiment of the iron core provided in the power supply device of the elevator car of the present invention.

[Explanation of symbols]

11 car 51, 52 power supply means 51a, 51b, 52a, 52b, 53a, 53b power supply line 61a, 62a iron core 61b, 62b coil 61e rectifier circuit 61f inverter 61g detector 7a, 7b support

Continued on the front page (72) Inventor Fumihiro Ogawa 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Co., Ltd. (72) Inventor Sansoji Hayasaka 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Co., Ltd. F term in Hitachi Building System (reference) 3F002 GA03 GB02 3F305 BA11 BB08 3F306 AA11 CB00 CB06

Claims (2)

[Claims] 1. A power supply means installed on a building side for outputting a current of a predetermined frequency, a power supply line connected to the power supply means and extending into a hoistway, and the car side facing the power supply line. And a coil wound around the core, and a converter for converting an electromotive force induced in the coil into a predetermined voltage. Equipped with multiple wires,
A feeder for an elevator car, characterized in that these feeder lines are extended in parallel in a hoistway so as to face the iron core, and in-phase means for making the phase of a current supplied to the feeder lines in-phase is provided. apparatus. 2. The power supply device for an elevator car, wherein the power supply line is supported by supports installed at an upper portion of the hoistway and at a lower portion of the hoistway, respectively.