JPH04117882U - elevator control device - Google Patents

Abstract

(57) [Summary] [Purpose] While effectively utilizing the regenerated energy of elevators,
To provide an elevator control device capable of driving the elevator with a simple auxiliary power source without stopping the elevator even in a power outage and furthermore, even if an abnormality occurs in a main circuit. [Configuration] In order to charge the battery 12 with regenerated energy,
A regenerative transistor 9 is connected to a battery 12 via a reverse blocking diode 11. During power outage, power outage detection device 15
When the elevator detects a power outage, the elevator is operated continuously using the power from the battery 12 to the nearest floor. In addition, when the main circuit is abnormal,
The abnormality detection device 17 issues a command to the controller 8-2 to drive the third inverter bridge 25, thereby operating the elevator to the nearest floor.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention charges the regenerated energy of the elevator to the battery via the regenerative transistor. Configures an uninterruptible power source using electric power and battery power, and controls the uninterruptible power source even during normal operation. By supplying electricity to the elevator, continuous operation is possible even in the event of a power failure while the elevator is running. In addition, if an abnormality occurs in the power converter for normal operation while the elevator is running, you can quickly rescue yourself. The present invention relates to a control device for an elevator that can start operation.

0002

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 1-259736, the conventional device automatically shuts down the converter during a power outage. Compare and detect the point when the output voltage of the battery becomes equal to the battery voltage, and at this point the battery is By driving the elevator with It was designed to shorten the time it takes to rescue customers.

0003

[Problem that the idea aims to solve]

The above conventional technology is designed to effectively utilize regenerative energy unique to elevator loads. This caused problems in terms of energy conservation.

0004 Another problem was that when there was a power outage, the elevators had to stop for a while. .

[0005] Furthermore, if an abnormality occurs in the power converter for normal operation, the elevator will not be able to run. If this abnormality occurs while the elevator is running, passengers will not be able to enter the elevator. There was a problem with being locked in.

[0006] The purpose of this invention is to effectively utilize regenerative energy unique to elevator loads while In addition, the elevator does not stop even when the power goes out, and a power converter for normal operation is installed. Elevator control that can drive the elevator with a simple auxiliary power supply even if an abnormality occurs The goal is to provide equipment.

[0007]

[Means to solve the problem]

To achieve the above purpose, DC power is rectified from AC power source and smoothed by a capacitor. A battery that charges regenerative energy via a regenerative transistor that controls regenerative power is added to the power supply. the first inverter bridge and the third inverter bridge connected in parallel to the circuit. Electric motors each connected to an inverter via a switch, AC power outage detection device, An abnormality detection device for normal operation, consisting of the battery and a second inverter bridge. An intermittent power source or an uninterruptible power source is connected to a control device.

[0008]

[Effect]

The regenerative transistor charges the battery with regenerative energy, so it Raw energy is effectively stored.

[0009] An uninterruptible power source consisting of a second inverter is connected to the battery; The control device is connected and the stored energy can be used effectively for normal operation. Wear.

0010 In addition, the uninterruptible power source consisting of a battery and a second inverter is connected to the control device. Therefore, even if a power outage occurs, not only will the unused elevator equipment not be affected by the power outage, but Since the first inverter device that constitutes the power converter for normal operation is also operable, There is no need to stop the elevator.

[0011] Furthermore, since a third inverter is connected to the battery, the power supply for normal operation is Even if an abnormality occurs in the force transducer, the motor can still be driven by the third inverter, and the It will not make the Beta inoperable.

0012

【Example】

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0013] 1 is an AC power supply, 2 is a rectifier that converts AC power to DC power, 3 is a capacitor, 4 is the first inverter bridge, 5 is the electric motor, 6 is the main rope, 7 is the car, 8 is the A control device, 9 a regenerative transistor, 10 a limiting resistor, 11 a reverse blocking diode, 12 is a battery, 13 is a second inverter bridge, and 25 is a third inverter bridge. 14 is a power supply diode, 15 is a power failure detection device, 16 is a power failure detection signal, and 17 is a power supply diode. Abnormality detection device for normal operation, 18 is an abnormality detection signal, 19 is an encoder, 20 is a counter 27 is a supplementary power transformer, 28 is a supplementary power rectifier, 29 is a supplementary charger. The source capacitor 30 is a power supply diode.

[0014] Next, the configuration and operation will be explained.

[0015] Convert AC power 1 to DC power with rectifier 2, and smooth the DC power with capacitor 3. Ru.

[0016] The smoothed DC power supply is converted into AC with variable frequency and variable voltage by the first inverter bridge 4. It is converted into voltage and supplied to the electric motor 5. The electric motor 5 rotates the sheave 21 and the main rope 6, the car 7 is raised and lowered.

[0017] The car 7 and the counterweight 20 are configured in a hanging type, and mechanical energy is The electric current passes through the motor 5, the regenerative transistor 9, and the reverse blocking diode 11. The battery 12 is charged as regenerative energy.

[0018] The regenerated energy charged in the battery 12 is converted into AC by the second inverter bridge 13. Converted to power source to form an uninterruptible power source.

[0019] AC power from the uninterruptible source is supplied to the transformer 8-1 in the control device 8, and the It is used for loads such as 8-2 and brake 22.

[0020] The controller 15-2 receives power from an uninterruptible source consisting of the battery 12 and a second inverter. and controls the first inverter bridge 4 to control the variable frequency, as described above. It is configured to control a variable AC voltage.

[0021] First, a case where a power outage occurs in the AC power supply 1 will be described. Power outage to AC power supply 1 When this occurs, the power failure detection device 15 operates and sends the power failure detection signal 16 to the controller 8-2. give. Naturally, the voltage across capacitor 3 begins to decrease. The controller 8-2 , starts deceleration operation in response to the power failure detection signal 16, and backs up the voltage across the capacitor 3. When the voltage becomes lower than the voltage of the battery 12, the first inverter is connected via the power supply diode 14. Supplies battery voltage to the train 4, drives to the nearest floor, and safely transports passengers.

[0022] During regenerative operation, if a power outage occurs in AC power supply 1, the regenerative energy is transferred to the regenerative transistor. It decelerates while storing data in the battery 12 via the reverse blocking diode 11 and the nearest Drive to the floor and transport passengers safely.

[0023] Next, a case will be described in which an abnormality occurs in the power converter for normal operation. normal If an abnormality occurs in the power converter for operation, for example, the first inverter bridge 4 If a closing failure occurs in a self-extinguishing element such as a transistor, the upper and lower This results in a short-circuited state of the arm, and the capacitor 3 is short-circuited. This allows instantaneous An excessive current flows through the controller 8, the abnormality detection device 17 operates, and the abnormality detection signal 18 is sent to the controller 8. -Give to 2.

[0024] The controller 8-2 receives the abnormality detection signal 18 and controls the operation of the first inverter bridge. At the same time, the switch 23 is opened. This will stop the elevator. Ru. Next, the controller 8-2 operates the third inverter bridge 25 and switches the switch. 24 is closed and the electric motor 5 is driven to promptly transport the passengers to the nearest floor. During this time, Elevators operate continuously at all times by supplying an uninterruptible power source to the control circuit. It functions extremely safely as it monitors

[0025] Of course, in order to reduce battery capacity, the operating speed of the elevator in the event of an abnormality is By setting the speed to a low level and setting it to operate only in the light load direction, , the control method of the third inverter bridge is the same as that of the first inverter bridge for normal operation. Unlike the control method, constant low frequency control can be used.

[0026] supplementary power transistor 27, supplementary power rectifier 28, supplementary capacitor 29, In the supplementary power supply circuit consisting of the supplementary charge diode 30, the potential of the battery 12 is used as the supplementary power supply. It serves as a supplementary function, supplying power only when the level is lower than that.

[0027]

[Effect of the idea]

According to the present invention, from an uninterruptible source consisting of a battery 12 and a second inverter 13, Since power can be supplied to the control device 8, there will be no power outage to the control device 8-2, and the operation will not stop. Since there is no battery, the first inverter bridge 4, which receives power from the battery 12, is stopped. The elevator can be operated without stopping, and the elevator can safely transport passengers to the nearest location without stopping the elevator. It has the effect of being able to be transported to the floor.

[0028] In addition, even if an abnormality occurs in the power converter for normal operation, the third inverter can be immediately replaced. By starting 25 and operating the elevator, passengers are kept in the car for a long time. It has the effect of being able to be quickly transported to the nearest floor without being packed.

[0029] In addition, the regenerative energy of the elevator is transferred to the regenerative transistor 9 and the reverse blocking diode. The energy can be stored in the battery 12 via 11, and the energy can be effectively used for normal operation. energy saving effect can be obtained.

[0030] Furthermore, by installing an auxiliary power supply circuit, the This makes it possible to compensate for variations in the potential of the battery 12 and decrease in capacity, thereby safely transporting passengers. It has the effect of being able to be transported to the nearest floor.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a circuit diagram of another embodiment of the present invention.

[Explanation of symbols]

4... First inverter bridge, 8... Control device, 9... Regeneration transistor, 11... Reverse blocking diode, 12... Battery, 13... Second inverter bridge, 25... Third inverter bridge, 27... Supplementary power transistor, 28... Supplementary Power supply rectifier, 29...supplementary capacitor, 30...supplementary supply diode.

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Masahiro Kontani 1-6 Kanda Nishikicho, Chiyoda-ku, Tokyo Inside Tate Elevator Service Co., Ltd. (72) Creator Hiromi Inaba 4026 Kuji-cho, Hitachi City, Ibaraki Prefecture Nippon Co., Ltd. Inside Hitachi Research Institute, Tachi, Ltd. (72) Creator Shunsuke Mine 1070 Ichige, Katsuta City, Ibaraki Prefecture Hitachi Corporation Inside the Mito factory

Claims (5)

[Scope of utility model registration request] 1. A rectifier that converts AC power into DC power, a capacitor that smoothes the DC power, a regenerative transistor that controls regenerative power, and a battery that is connected in series with the regenerative transistor and stores the regenerative energy controlled by the regenerative transistor. , a first inverter bridge that receives power from the DC power source and converts it into AC power; a second inverter bridge that receives power from the battery and converts it into AC power;
a third inverter bridge; the first inverter bridge; an elevator drive motor connected to the third inverter bridge via a switch; a power supply diode that supplies power from the battery to the first inverter bridge; The uninterruptible power source includes an uninterruptible power source consisting of a battery and the second inverter bridge, an AC power failure detection device that detects a power failure of the AC power source, and an abnormality detection device for normal operation that detects abnormal current of the capacitor. An elevator control device, characterized in that a control device is connected to the elevator. 2. The elevator according to claim 1, wherein the battery constantly supplies energy to an uninterruptible intermittent source and automatically supplies energy to the first inverter bridge via a power supply diode during a power outage of the AC power source. control device. 3. In claim 1, the control device generates a deceleration command based on a power outage detection signal of the AC power outage detection device that occurs while the elevator is running, and controls the elevator to automatically operate to the target floor. Device. 4. In claim 1, the control device stops the elevator in response to an abnormality signal from the normal operation abnormality detection device generated while the elevator is running, and controls the first inverter by opening and closing the switch. An elevator control device that opens a bridge and the elevator drive motor, closes the third inverter bridge and the elevator drive motor, and operates the elevator toward a target floor. 5. A rectifier that converts AC power into DC power, a capacitor that smoothes the DC power, a regenerative transistor that controls regenerative power, and a battery that is connected in series with the regenerative transistor and stores the regenerative energy controlled by the regenerative transistor. , a first inverter bridge that receives power from the DC power source and converts it into AC power, a second inverter bridge that receives power from the battery and converts it into AC power, a third inverter bridge, the first inverter bridge, and , an elevator driving motor connected to the third inverter bridge via a switch, a power supply diode for supplying power from the battery to the first inverter bridge, and an uninterruptible uninterruptible motor including the battery and the second inverter bridge. a power supply, an AC power failure detection device for detecting a power failure of the AC power source, an abnormality detection device for normal operation for detecting abnormal current in the capacitor, and a supplementary power supply circuit for replenishing energy to the battery, and controlling the uninterruptible power source. An elevator control device, characterized in that the device is connected to the elevator.