JP2000233876A - Power supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability and safety of a power supplying system by storing a DC power supplied from a first power source, such as natural energy in a battery to supply it through an AC power source circuit system, and supplying a power to a control device through the power source circuit system of a second power source of a commercial AC. SOLUTION: The power by a first power source generated in a solar 1 is stored in a battery 2, and this stored power is converted into an AC power source by an inverter circuit 3. An escalator is rotated to downward or upward by an electric motor 30 by the use of this AC power source. The power for the control circuit of the electric motor 30 is supplied from a different system circuit from the first power source or a power source A100, that is a second power source of commercial AC through a no-fuse breaker F2. According to this structure, since the control system belongs to the stable second power source system of the commercial AC that is a different system from natural energy, the function of a safety device important for personal protection will not be lost, and the reliability and safety can be maintained.

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 equipment such as an elevator, which functions by the output of a motor, and more particularly to a power supply device utilizing a natural energy power supply such as a solar power.

[0002]

2. Description of the Related Art Conventionally, in the case of equipment that exerts its function by rotating an electric motor (defined as a power supply transmitted from a power plant by wire), for example, an escalator that is a kind of elevator, see Japanese Utility Model Application Laid-Open No. 33574/1985. As disclosed, a power saving control method is known in which an electric motor is used to drive a passenger transporter, and the windings are switched according to the passenger load. Further, a method of applying an inverter device for switching the operation speed of an escalator (for example, JP-A-8-198564) and its application examples are also known.

[0003]

The above prior art is based on the premise that a motor is rotated by a commercial power source (defined as a power source transmitted from a power plant by wire) and its electric control is performed.
It relied on traditional power sources that generated electricity from fossil fuels and nuclear power. Therefore, the idea of utilizing natural energy such as solar power (hereinafter abbreviated as solar) and wind power, which have recently attracted particular attention as clean natural energy without fear of environmental destruction such as global warming and oxygen rain, is used as a power source. However, there was no technical point of view to ensure the situation and reliability and safety when utilizing these renewable energy sources.

[0004] It is an object of the present invention to provide a power supply device that utilizes electric power supplied from natural energy as an input power supply of a motor, and can improve the reliability and safety of the power supply system.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a facility, such as an elevator, which functions by an output of a motor and a control device for controlling the output of the motor. As a power source, DC power supplied from a first power source such as natural energy other than a commercial power source is stored in a battery, and the DC power is supplied via an AC power supply circuit system which converts the DC power storage into an AC power supply by an inverter circuit. On the other hand, as the power source of the control device, the first
The control is performed via a power supply circuit system of a second power supply of commercial alternating current supplied from a separate system from the power supply.
Further, in a facility that exerts a function by an output of a motor, such as a lift, and a control device that controls the output of the motor, a DC supplied from a first power source such as natural energy other than a commercial power source is used as a power source for the motor. The power is stored in a battery, and the DC stored power is converted into AC power by an inverter circuit and supplied to the motor. An AC power supply circuit system and a second commercial AC power supplied from a system different from the first power supply. Since the power supply circuit includes two power supplies of a power supply circuit system of the power supply, the power supply of the control device is constituted by a power supply circuit system of a commercial AC second power supply supplied from a separate system from the first power supply. is there. In addition, the control device includes a power supply switching determination unit that instructs the two power supplies for motor output to switch to one of the first and second power supplies.

According to the above configuration, the rotation output of the motor is:
The power supplied from a first power source such as a solar power source is used as a main power source. For example, a control system such as a safety device for protecting passengers uses a commercial second power source that is electrically stable. A reliable and safe power supply can be obtained. In addition, a commercial power source such as a solar
Switching to the power supply and the reverse switching can be appropriately commanded by the power supply switching determination means, so that it can respond quickly to insufficient solar power supply caused by unexpected weather such as stormy weather, and conversely, to satisfy the solar power supply and use it Appropriate measures can be taken and a stable and reliable motor output can always be obtained.
Also, in the case of wind power generation, the instability can be complemented similarly to solar power generation.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an escalator, which is a kind of elevator, will be described below as an example of a facility that exerts a function by the rotation output of an electric motor, and a solar power supply as a typical example of natural energy. explain. In FIGS. 1 and 2, the same components and working parts are denoted by the same reference numerals. The escalator (not shown) of the first embodiment is supplied with necessary electric power by the electric control circuit shown in FIG. That is, the first generated in solar 1
The power from the power supply is stored in the battery 2, and the stored power is converted into an AC power supply (for example, three-phase 200 V) normally used to rotate the electric motor 30 by an inverter circuit 3 that converts the stored power from DC to AC. The AC power converted by the inverter circuit 3 via the no-feed breaker (FFB) F1 is supplied to the contactor 1 for ascending operation.
The escalator is rotated downward or upward by the motor (IM) 30 by switching the contactor 12 for 1 or lowering operation.

On the other hand, the control circuit of the electric motor 30 includes a power supply A100 (for example, AC10), which is a second power supply of commercial AC, which is a circuit separate from the first power supply generated by the solar power 1.
0V) through the no-feed breaker F2, and when the escalator is to be operated upward, when the operation switch 20 is operated to the upward (UP) side, the coil 11C of the upward contactor 11 is excited. At the same time, the contactor 11 for ascending operation is turned on, and at this time, the electric motor 30 rotates the escalator to the ascending side to transport the passenger. On the other hand, when it is desired to perform the descending operation, when the operation switch 20 is operated to the descending (DOWN) side, the coil 12C of the descending operation contactor 12 is excited and the descending operation contactor 12 is turned on at the same time. 30 rotates the escalator to the downside to transport passengers. Here, when the operation of the motor 30 is stopped on the ascending side, the stop switch 50 is operated to cut off the excitation circuit of the coil 11C of the contactor 11 for ascending operation, thereby canceling the input of the contactor 11 for ascending operation to cancel the electric motor. This is done by stopping the rotation of 30. Conversely, when the operation on the descending side is stopped, the excitation circuit of the coil 12C of the descending operation contactor 12 is cut off by operating the stop switch 50, thereby canceling the turning-on of the descending operation contactor 12 and rotating the motor 30. Is performed by stopping the operation. Reference numeral 11cb in FIG. 1 denotes a normally closed contact of the contactor 11 for ascending operation, and reference numeral 12cb denotes a normally closed contact of the contactor 12 for descending operation, which are provided for preventing reverse operation input.

Reference symbol S in FIG. 1 denotes a contact point of various safety devices for ensuring passenger safety and detecting abnormality of components.
When these safety devices operate, the circuit of the commercial power supply A100, which is the second power supply thereof, is cut off, the rotation of the electric motor 30 is stopped, and the operation of the escalator is stopped.

According to the first embodiment, even if inconveniences such as a decrease in the storage capacity of the first power supply generated in the solar cell 1 and a disturbance in the frequency due to an abnormality in the inverter circuit 3 occur, the control system is provided in another system. Since the power supply belongs to the second power supply system of stable commercial AC, the function of the safety device, which is particularly important for personal protection, is not lost, and the trustworthiness and security to be provided can be maintained.

An escalator (not shown) according to the second embodiment of the present invention is supplied with necessary electric power by an electric control circuit shown in FIG. That is, as an AC power supply circuit system of the solar 1 serving as a power supply of the electric motor 30, electric power as a first power supply generated in the solar 1 is stored in the battery 2,
A circuit is provided for converting the DC storage power into an AC power supply generally used for rotating the electric motor 30 by the inverter circuit 3. Then, the escalator is rotated downward or upward by the electric motor 30 via the contactor 11 for upward operation or the contactor 12 for downward operation via the no-feed breaker F1. In addition, a commercial AC power supply A20, which is a second power supply, is used as an AC power supply circuit system of another system other than the solar power 1 serving as a power supply of the motor 30
0 (for example, 200 V AC three-phase) is connected between the inverter circuit 3 and the no-feed breaker F1. On the other hand, the control circuit of the electric motor 30 is configured from a commercial AC power supply A100 (for example, AC100V), which is a second power supply in a circuit separate from the solar 1, via a no-feed breaker F2. The relationship between the operation of the operation switch 20 and the operation direction in this circuit, the contactor 11 for ascending operation and the coil 11C, the contactor 12 for descending operation and the coil 12C, the stop switch 50, the safety device S, the normally closed contacts 11cb, 12cb. The electrical relationships, functions, and operations of are the same as in FIG.

Further, in the second embodiment, an AC power supply circuit system for the electric motor 30 connected to the first power supply generated by the above-mentioned solar power 1, and a commercial power supply for the electric motor 30 of the second power supply which is separate from the solar power supply 1. A power supply switching determiner S200 is connected to the circuit of the commercial AC power supply A100 as a power supply switching determination unit for the two-system power supply of the AC power supply circuit system. The power supply switching determiner S200 receives an electric power shortage signal from a separately provided power storage amount detector (not shown) of the battery 2 or a sunlight presence / absence detector (not shown), and receives an AC power of the solar 1 From power supply circuit to commercial AC power supply circuit A
200, the coil 210C of the commercial power switching contactor is excited, and the normally open contact 210a of the commercial power switching contactor is turned on, and at the same time, the normally closed contact 210b of the power switching contactor on the solar 1 side is turned on. In this state, the electric motor 30 is disconnected from the commercial AC power supply A200.
To rotate. On the other hand, the power supply switching determiner S200 receives a signal indicating that the amount of power stored in the
When a command for switching to the AC power supply circuit system of the solar 1 is issued from 200, the coil 2 of the contactor for switching the commercial power supply is used.
The excitation of 10C is released, whereby the normally closed contact 210b of the power switching contactor on the solar 1 side is turned on. In this state, the electric motor 30 is rotated by the AC power supply circuit system of the solar 1.

According to the second embodiment, the first power supply of the solar power 1 whose power supply is considered to be unstable can be supplemented with a stable commercial power supply of the second power supply, and the reliability of power supply can be improved. it can. Also in this case, since the stabilizer system belongs to the second power supply system of the commercial power supply as in the first embodiment, predetermined reliability and safety can be ensured.

The configuration of the present embodiment is not limited to the illustrated solar system, but can be applied to a wide range of fields such as wind power generation and private power generation utilizing other natural energy. The present invention is not limited to the escalator, and is suitable for motor-applied devices, such as elevators and conveyors, which particularly emphasize reliability and safety.

[0015]

According to the present invention described above, it is possible to provide a highly reliable and stable power supply device as a power source for a motor.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of a power supply device according to a first embodiment of the present invention.

FIG. 2 is a control circuit diagram of a power supply device according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Solar (1st power supply), 2 ... Battery, 3 ... Inverter circuit, 11 ... Contactor for ascending operation, 11C
... Coil of contactor for ascending operation, 11cb ... Normal contact of contactor for ascending operation, 12 ... Contactor for descending operation, 12C ... Coil of contactor for descending operation, 1
2cb: normally closed contact of the contactor for descending operation, 20: operation switch, 30: electric motor, 50: stop switch, A1
00: commercial AC power supply (second power supply), A200: commercial AC power supply (second power supply), S200: power supply switching determiner, 21
0a: Normally open contact of commercial power supply contactor, 210
b: normally closed contact of a power switching contactor, 210C: coil of a commercial power switching contactor, F1, F2: no-feed breaker (FFB), S: contacts of various safety devices.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhei Kojima 1070 Ma, Hitachinaka-shi, Ibaraki Pref. Mito Plant, Hitachi, Ltd. (72) Inventor Yoshiyuki Sugiyama 4-6-6 Kanda Surugadai Chiyoda-ku, Tokyo (72) Inventor Yoko Enomoto 6-36 Shin-Ogawa-cho, Shinjuku-ku, Tokyo F-term (reference) in Kyotani Consulting Co., Ltd. (reference) 3F002 GA03 3F321 AA06 DA03 DD00 DD01

Claims (3)

[Claims] In a facility that exerts a function by an output of a motor such as an elevator, and a control device for controlling the output of the motor, a main power source of the motor is supplied from a first power source such as natural energy other than a commercial power source. The supplied DC power is stored in a battery, and the DC power is supplied through an AC power supply circuit system that converts the DC power into AC power by an inverter circuit. A power supply device, wherein the motor is controlled via a power supply circuit system of a second commercial AC power supply supplied from another system. 2. A facility, such as an elevator, which functions by an output of an electric motor and a control device for controlling the output of the electric motor, wherein the electric power of the electric motor is supplied from a first power supply such as natural energy other than a commercial power supply. DC power stored in a battery, and the DC stored power is converted into AC power by an inverter circuit and supplied to the motor, and a commercial AC power supplied from a system different from the first power source. Power supply circuit system for the second power supply, and a power supply circuit system for a commercial AC second power supply supplied from a system different from the first power supply as a power supply for the control device. A power supply device comprising: 3. The motor output motor according to claim 2, wherein
A power supply device comprising: a power supply switching determination unit that instructs a power supply of a system to switch to one of the first and second power supplies.