JPH012984A - elevator control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an elevator rescue operation device.

(Prior Art) Modern elevators use backup power sources such as batteries to operate the elevator during a power outage, so that the elevator does not stop between floors and trap passengers in the event of a power outage, causing anxiety to the passengers. Drive.

An increasing number of aircraft are equipped with automatic landing devices in the event of a power outage, which rescue passengers by landing them on the nearest floor.

The outline of its configuration is shown in FIG. 1 is a commercial power source, 2 is a motor control device, 3 is a main circuit contactor, 4 is an electric motor, 5 is a main sheave, 6 is an elevator, 7 is a counterweight, 8 is a battery power source, 9 is a landing device during power outage, 10 is a contactor operating during a power outage.

This operation will be explained below. In normal elevator operation, the electric motor 4 is driven through a main circuit contactor 3 by a power source 1, a motor control device 2, and the elevator is operated. On the other hand, in the event of a power outage in the power supply 1 for power outage, the main circuit contactor 3 is disconnected, the power outage operation contact I @ device 10 is turned on, the battery power source 8, the power outage landing device 9, the power outage operation contactor 10 requires # -o, pa
The electric motor 4 is operated to drive the elevator to the nearest floor.

Control power for the 'Ki motive control device 2 is supplied from a battery power source 8 via a power outage landing device 9. However, if a power outage occurs, the contactor 3. It takes time to switch the IO and switch the elevator operation control from the control device 2 to the rescue operation device 9.5 During the time required for this switching, the elevator is stopped once by applying the brakes, and after the switching is completed, rescue operation is started. had started.

(Problem to be solved by the invention) As mentioned above, the elevator stops once after a power outage occurs until the rescue operation starts, which causes anxiety for passengers and furthermore takes time to switch. This resulted in increased anxiety among passengers.

An object of the present invention is to provide an elevator rescue operation device which can rescue passengers without causing anxiety as much as possible by minimizing the time required to switch to rescue operation after a power outage occurs as described above.

[Structure of the invention]

(Means for Solving the Problem) The present invention includes a power conversion device that converts AC power from a commercial power source and supplies power to an elevator motor, a power outage detector that detects a power outage in the commercial power source, and a power outage detector that detects a power outage in the commercial power source. A standby power supply device that supplies power to the power conversion device, a direction and position detection means that detects the elevator operating direction and position immediately before the power outage, and a rescue device that outputs a speed command during a power outage according to the elevator operating direction and position immediately before the power outage. An operation control means, an elevator control means that controls the power converter using a normal speed command during normal times, and an elevator control means that controls the power converter using a power outage speed command during a power outage, a direction position detection means during a power outage, and a rescue operation. It is characterized by having a power supply means for supplying electric power from a power supply device to the control means and the elevator control means.

(Function) In the device configured as described above, the power converter is controlled in accordance with the normal speed command, and the AC power from the commercial power source is converted to drive the electric motor and control the elevator.

In the event of a power outage, power is supplied to the power conversion device from the standby power supply device, and power is also supplied to the direction position detection means, the rescue operation control means, and the elevator control means.

The power converter is controlled by a power outage speed command according to the elevator operating direction and position immediately before the power outage.

The elevator is operated to the nearest floor without being stopped between floors due to a power outage.

(Example) An embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is a commercial power supply, 2 is a motor control device,
4 is the electric motor, 5 is the main sheave, 6 is the elevator car,
7 is a counterweight, and 12 is a control circuit for rescue operation. A constant power failure monitoring circuit 1 is included in the rescue operation control circuit 12.
0 is provided to detect the elevator operating direction and position immediately before a power outage. 11 is a power failure detection relay, commercial type 117
Detects power outage of X1.

A speed detector 17 detects the speed of the elevator 6. 21 is a brake, which applies a brake to the elevator when excitation is lost. , 16 is a battery f of the constant power failure monitoring circuit 10 in the rescue operation control circuit 12.
f power source.

The motor control circuit 2 is mainly composed of a power conversion device that converts AC power from the commercial power supply 1, and includes a main circuit contactor 33, a rectifier 32 having bridge-connected diodes, a smoothing capacitor 31 provided in the DC circuit, and a voltage detector. 34. Inverter 261 with bridge-connected transistors Regenerative power absorption circuit 27 for absorbing regenerative energy. It is composed of an elevator control circuit 25.

The DC circuit of the motor control circuit 2 includes a battery power supply 135.
, a contact 36a of the contactor, and a blocking diode 37 for preventing backflow, which supplies power to the main circuit during a power outage.

Elevator control circuit 25, rescue operation control circuit 12, speed detector 17. The brakes 21 each have a perfect weight of 117X28.13.18.22. Relay contact 29
a. 14a.

19a, 23a, and blocking diode 30.
A circuit consisting of 15° 20, 24 is provided to supply power in the event of a power outage.

39 is a current detector for detecting @motor type A, 38 is a door zone and landing zone detector, and 53 is an in-car load detector.

Next, the operation of this embodiment will be explained.

In the case of normal elevator operation, the rectifier 32 converts AC power from the commercial power supply 1 into DC power, and the inverter 26 controlled by the output signal of the elevator control circuit 25 converts this DC power into AC power. drive the elevator.

In the event of a power outage, when the power outage detection relay 11 detects a power outage, the power is transferred from the battery power source 28.13.18.22 to the elevator control circuit 25, rescue operation control circuit 13. Electric power is supplied to the speed detector 17 and the brake 21. The elevator control circuit 25 controls the inverter 26 with a speed command at the time of a power outage according to the operating direction and position of the elevator immediately before the power outage, drives the electric motor 4, and drives the elevator car 6 to the nearest floor to reach the floor. After a power outage occurs, the main circuit's power source is only the charge stored in the capacitor 31, but the voltage detection relay 34 detects that the main circuit voltage has decreased to the same voltage as the battery power source 35, Power is supplied from the battery power supply 35 to the main circuit to continue operation. Note that since the brake 21 is also supplied with power from the battery power source 22, the brake is not applied when a power outage occurs, and the elevator car 6 continues to move due to inertia. FIG. 2 shows the configuration of the constant power failure monitoring circuit 10 provided in the rescue operation control circuit 12 of FIG. 1. In Figure 2, llb is the first
The break contact of the power failure detection relay 511 in the figure, 14 is a relay for supplying itt power to the rescue operation circuit, 19 is a relay for supplying power to the speed detector, 29 is a relay for supplying power to the elevator control device, 23 is a relay for supplying power to the brake 21; 38 is a make contact of the v1 electric device that is excited when a brake release command is output in the elevator control circuit 25; 36 is a contactor that supplies battery power for the main circuit; 34b is the main circuit voltage is the main circuit battery voltage g3
This is the break contact of the detector that is energized when the voltage exceeds 5. 40a is a make contact of a relay that is energized when a direction is selected in the elevator control circuit 25, 41a is a make contact of a relay that is energized when an UP direction is selected in the elevator control circuit 25, and 42 is a make contact of a relay that is energized when an UP direction is selected in the elevator control circuit 25. 42a is relay 4 which is energized when
The make contact 43a of No. 2 is D in the elevator control circuit 25.
44 is a make contact of a relay that is energized when the OWN direction is selected; 44 is a relay that is energized when the DOWN direction is selected; 44a is a make contact of the relay 44;

45 is a relay that is energized when the UP or DOWN direction is selected during a power outage, and 46a is an elevator.
47 is a relay that is energized when it is within the door zone (approx. This is a relay that is energized when the voltage is within ±20 no. 50 is car 6 during power outage
A relay 51 is energized when 6 is outside the door zone, and 51 is a relay energized when 6 is inside the door zone and outside the landing zone.

FIG. 3 is a block diagram showing the configuration of the elevator control circuit. 45C is an electric switch such as an FET that is conductive when the relay 45 is energized, and is energized when direction selection is being performed during a power outage.

45d is an electric switch that becomes conductive when demagnetized. 58 is a speed command circuit that generates a speed command during normal operation, and 59 is a speed command circuit that generates a speed command during a power outage. 52 is a speed control amplifier, 53 is a load detector in the elevator car, 54 is a load adder in the elevator car,
55 is an AC motor current signal calculator for vector control, etc.;
6 is a current control amplifier, and 57 is an inverter drive circuit.

FIG. 4 shows a specific configuration of the power failure speed command generation circuit 59 shown in FIG. In Figure 4, 60.61°74 is a variable resistor, 62, 63, 69-73 are resistors, 68 is a constant voltage diode, 75 is a capacitor, 64-67 is an operational amplifier, and 50c is the door zone in case of a power outage in 50. The electric switch 51c, which is energized when the relay is energized, becomes conductive when the relay is energized. When the a device is energized, the switch becomes 4, 42c is the 42 relay, 44c is the 4
This is an electric switch that becomes conductive when each of the four relays is excited.

During normal elevator operation, the relay 45, which serves as a direction selection relay in the event of a power outage, is not energized in the circuit shown in Fig. 2, so the switch 45d shown in Fig. 3 is in a conductive state, and a speed command is generated within the elevator control device. It is controlled according to the speed command value of the device 58. In this case, the speed command signal is compared with the speed feedback of the elevator speed detector 20, the deviation thereof is amplified by the speed control amplifier 52, and the load signal of the car load of the load detector 53 is added thereto to generate a current signal according to the torque standard. A current reference signal is outputted by the arithmetic unit 55, and this is compared with the feedback signal of the motor current detector 39, and the deviation thereof is amplified by the current control amplifier 56 and becomes a voltage reference, and the inverter main circuit 26 is controlled by the inverter control circuit 57. and the electric motor 4 is controlled according to the speed standard.

When a power outage occurs here, the power outage detection relay 1 shown in Figure 1
1 is demagnetized and the break contact 11b shown in FIG. At this time, if the elevator is in operation and the brake 21 is released, the contact 38 is closed, so the relay 23 is also energized, and the battery power source 22 is also connected to the brake 21, so that the brake continues to be released.

Next, an explanation will be given of the operation in the case where the elevator was operating in the UP direction outside the door zone before the power outage. In this case, since the direction has been selected, the contact 40a is closed in FIG. 2. Since the UP direction is selected, the contact 4La is also closed, so the relay 42 is in an energized state, and the direction selection relay 45 at the time of a power outage is also energized.

Therefore, the switch 45c shown in FIG. 23 becomes conductive, and the switch 45d becomes non-conductive. As a result, the speed command is switched to the power outage speed command generation circuit 59.

Here, if elevator car 6 is outside the door zone, the second
When the relay 50 shown in the figure is energized, the switch 5 shown in FIG.
0c becomes conductive. In this case, the voltage set by the variable resistor 60 and the resistor 62 is input to the operational amplifier 64.

Here, the constant voltage diode 68 serves as a limiter, and when the input voltage exceeds the voltage of the constant voltage diode, it is limited to that value. Furthermore, this output is integrated by an integrating circuit composed of an operational amplifier 66, a variable resistor 74, a resistor 71, and a capacitor 75, and this output is integrated by an operational amplifier 65. resistance 70
．． 69, the input voltage is increased to the value of the input voltage. The pattern created in this way is UP
In the case of direction selection, since the switch 42c is in a conductive state, the third
The signal is input to the speed control amplifier 52 shown in the figure. The following operations are controlled in the same manner as normal elevator operation. However, since the main circuit does not have a power source, only the charge stored in the capacitor 31 is used, and the main circuit voltage decreases. If this is detected by the voltage detection relay 34 and the voltage is set to be demagnetized when the voltage drops to the voltage of the backup battery itt source 35, the contactor 36 shown in FIG.
A is turned on, power is supplied to the main circuit from battery G35, and operation can be continued.

In this case, the speed command value for rescue operation must be set to a speed that allows operation with battery voltage. Normally, in the primary frequency control of an AC motor, in order to obtain the same torque, it is necessary to control the ratio V/f of the supplied voltage V and the operating frequency f to a constant value, so the main circuit battery voltage VB and rescue The operating speed SB must be set as S with respect to the DC voltage ■N during normal elevator operation and the rated speed SN in the relationship Va/Ss≧VN/SN. Continuing the operation in this way, when entering the door zone, the relay 47 is energized, the A appliance 50 is demagnetized, the relay 51 is energized, and the switch 51c
conducts. In this case, the voltage set by the variable resistor 61 and resistor 63 is input. This set voltage is set lower than the set voltages at the variable resistor 60 and resistor 62 described above. Then, the speed command pattern decreases, the speed also decreases, and when the vehicle enters the :R floor zone, the relay 49 is energized, the relay N switch 51 is deenergized, the switch 51c becomes non-conducting, and the speed command becomes zero. At the same time, the relay 23 is demagnetized and the brake is applied to stop the elevator. In this way, the elevator continuously shifts to the rescue operation and ends the rescue operation. In this case, the voltage waveforms at points ■, ■, and ◎ in FIG. 4 are shown in FIG.

Even if the elevator is running down, the relay 42
is replaced by the operation of the relay 44, and the speed command pattern passes through an inverting amplifier composed of an operational amplifier 67 and resistors 72 and 73, resulting in the same operation except that the polarity is reversed. In addition, if a power outage occurs while the elevator car 6 is inside the door zone and outside the landing zone, the resistor 63 and the variable resistor 6
1, and will not operate if the elevator 6 is within the landing zone.

As mentioned above, if a power outage occurs while the elevator is in operation, the control circuit is immediately backed up with backup power, and the operating speed command is switched to the rescue operation pattern in the operating direction before the power outage. Passengers can be rescued by shifting to rescue operation without stopping the elevator, thereby improving service by minimizing passenger anxiety.

[Effect of the invention 1] According to the present invention, there is provided an elevator rescue operation device that can shift to rescue operation after a power outage occurs without stopping the elevator, and can rescue passengers while minimizing their anxiety. can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The specific circuit diagram of the continuous power outage monitoring circuit in the figure, Figure 3 is
A concrete block diagram of the elevator control circuit in the figure, Figure 4 is a concrete circuit diagram of the power outage speed command circuit in Figure 3, and Figure 5 is a concrete block diagram of the elevator control circuit in the figure.
The figure is a voltage waveform diagram at each point of ■■◎ in Figure 4, and Figure 6 is a configuration diagram showing a conventional elevator rescue operation system. 1...Commercial power source 4...Electric motor 6...Elevator car 10...Continuous power outage monitoring circuit 11...Power outage detection relay 12...Rescue operation control circuit 25...Nilevator control circuit 13, 16.28.35...Battery power supply 14a,
29a...Relay contact 368...Contactor contact Fig. 6

Claims (1)

[Scope of Claims] A power conversion device that converts AC power from a commercial power source and supplies power to an elevator motor; a power outage detector that detects a power outage of the commercial power source; and a power conversion device that supplies power to the power conversion device during a power outage. A backup power supply device for supplying the power, a direction and position detecting means for detecting the operating direction and position of the elevator immediately before the power outage, and a rescue operation control means for outputting a speed command during a power outage according to the operating direction and position of the elevator immediately before the power outage; Elevator control means for controlling the power converter according to a normal speed command during normal times, and controlling the power converter according to a power failure speed command from the rescue operation control means during a power outage; and detecting the directional position during a power outage. An elevator rescue operation device, comprising: a rescue operation control means; and a power supply means for supplying electric power to the elevator control means from a power supply device.