JPH0578051A - Control device for elevator - Google Patents

Abstract

PURPOSE:To fix the route of wiring as well as to prevent an ZNR sage absorber from being shortcircuited between lead wires by housing a surge absorber means absorbing induction noise which comes in the lead wire of a power supply, and a thunder surge absorber means in a same unit. CONSTITUTION:When inductive noise comes in a power supply for motive power 3phi.AC, noise is absorbed by the resistance R1 of a CR absorber and a capacitor C1. And identical reaction is shown in phase S and phase T. When inductive noise comes in a lighting power supply 1phi.AC, inductive noise is absorbed by a noise absorbing capacitor C2. And identical reaction is shown in the other phases. In the second place, when thunder surge comes in the power supply for motive power 3phi.AC, thunder surge is absorbed by a ZNR surge absorber Z2. And identical reaction is shown in phase S and phase T. When thunder surge comes in between wires R and T, thunder surge is absorbed by a ZNR surge absorber Z1. And identical reaction is shown in between other wires. When thunder surge comes in the lighting power supply 1phi.AC, thunder surge is absorbed by the ZNR surge absorber Z1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving safety for protecting equipment of an inverter main circuit from inductive noise and lightning surge.

[0002]

2. Description of the Related Art A conventional device is equipped with a lightning sensor as described in Japanese Patent Application No. 2-97609, and the elevator is stopped to the nearest floor by the operation of the lightning sensor to shut off the power supply. .. Further, generally, a noise filter for inductive noise and a ZNR surge absorber for lightning surge are separately installed as needed.

[0003]

In the above-mentioned prior art, since the noise filter and the ZNR surge absorber are separately installed, the wiring becomes discrete wiring. Therefore, it has been difficult to always keep the wiring route constant. .. Also, when a large surge voltage of dv / dt is applied between the power supply and ground, ZNR installed between each phase of the power supply and ground
There was a problem that an arc was generated between the lead wires of the surge absorber, causing a power supply short circuit accident.

The present invention is to make the route of the wiring constant,
The purpose is to prevent a short circuit accident between the lead wires of the ZNR surge absorber.

[0005]

In order to achieve the above object, a noise filter component and a ZNR surge absorber are mounted on a printed circuit board, the printed circuit board is housed in a unit case, and an insulator is filled in the unit case. There is something I did.

[0006]

Function: The wiring route can be kept constant, and dv / d
When a surge voltage with a large t is applied, an arc is not generated between the lead wires of each component and a power source short circuit does not occur.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a system configuration diagram of an inverter elevator. FIG. 2 shows a surge absorption circuit diagram. FIG. 3 shows a unit structure diagram.

Elevator power source 3 ¢. AC is a three-phase converter COV via a fuse-free breaker FFB
Is powered. The power source converted into direct current by the three-phase converter COV is connected to the smoothing capacitor Fil. Charged to C. When a traveling command is generated in the elevator, the traveling contactor 10T is energized to short-circuit the inrush current limiting resistor R1 shown in FIG. 1 and a microcomputer (not shown) generates a speed command and a rotation direction signal. This signal serves as a drive command for the inverter INV, the inverter INV generates an output, the induction motor IM rotates, and the rider's K balance weight C. W starts. On the other hand, the brake opening / closing contactor 15B is energized. 1 in FIG. AC-F
FB-transformer TR-fuse F2-10T2-rectifier Si-15B1-Mg. Magnet brake Mg. Br is energized, the brake is opened, and the electric base runs. Next, when there is a stop command, both the brake opening / closing contactor 15B and the traveling contactor 10T are de-energized, and the contact 15B1 of the brake opening / closing contactor and the normally-closed contact 10T2 of the traveling contactor are opened to release the magnetic brake Mg.Br and the brake is released. The hanging Elebase stops. The lighting circuit shown in FIG. AC is pulled in. This is because the lighting on the ceiling inside the car is kept on even if the power supply is cut off for some reason. Lighting power supply 1 ¢.
AC-Cover switch K.SW-Lamp output buffer ZLP-Lamp LAMP-Light switch SW-Lighting power supply 1
¢. The lighting of the ceiling in the car is turned on by the AC route.

Next, inductive noise is generated by the power source 3 ¢. The case of infiltration into AC will be described with reference to FIG. If inductive noise invades, power source 3 ¢. AC-Fuse Free Breaker FFB-Unit Case Terminal R-Fuse F1-
CR absorber resistance R1, capacitor C1-ground wire G
The induced noise is absorbed by the resistor R1 and the capacitor C1 of the CR absorber in the path of. S. Since the T phase is also the same, the description is omitted. Next, lighting power source 1 ¢. The case of infiltration into AC will be described with reference to FIG. When induction noise enters, lighting power source 1 ¢. AC-Cover Switch K. The noise absorption capacitor C2 absorbs the induced noise in the path of SW-noise absorption capacitor C2-ground line G. Since the other phases are the same, the description is omitted.

Next, a lightning surge is generated in the power source 3 ¢. The case of infiltration into AC will be described with reference to FIG. When a lightning surge enters between the power source and the ground, power source 3 ¢. AC-Fuse free breaker FFB-Terminal R of unit case-Fuse F1-ZNRZ2-ZNRZ2 absorbs lightning surge in the path of ground line G. S. Since the T phase is also the same, the description is omitted. Next, when the lightning surge occurred in R. The case where it penetrates between the lines of T will be described. Power source 3 when lightning surge enters
¢. AC-Fuse free breaker FFB-Unit case terminal R-Fuse F1-ZNRZ1-Fuse F
1-Unit case terminal S-Fuse-free breaker FFB-Power supply 3 ¢. The lightning surge is absorbed by ZNRZ1 in the AC path. The description is omitted because the same applies to other lines. Next, lighting power source 1 ¢. A case where a lightning surge enters the AC will be described. When a lightning surge enters, lighting power source 1 ¢. AC-Cover Switch K. SW-Unit case terminal A-ZNRZ1-ZNRZ1 absorbs a lightning surge along the path of the unit case terminal G. Next, FIG. 2 shows a detailed circuit diagram of the inductive noise absorbing surge absorber and the lightning surge absorbing ZNR of the power source and the illumination power source. FIG. 3 shows a structural diagram of the unit. The printed circuit board PCB1 has ZNRZ1. Z2 is mounted, and the resistance R2 of the CR surge absorber and the capacitors C1. The noise absorbing capacitor C2 is mounted and the wiring is a pattern wiring. The wirings of PCB1 and PCB2 are connected by a copper plate CU, and the case CASE is filled with an insulating material. In addition, a fuse F1 is provided on the surface of the case CASE, and a wiring terminal R. S. T.
A. B. G is provided.

[0011]

According to the present invention, when inductive noise or lightning surge is applied to the service line, the wiring route can be always kept constant, so that the device can be prevented from being destroyed or malfunction due to the surge. Further, even when a surge voltage with a large dv / dt intrudes, the insulation between the lead wires of each component can be strengthened by filling the case with an insulating material. Further, surge countermeasures can be taken in a short time even for an Elebase currently in operation without suspending the Elebase for a long time.
In addition, when each device of the surge absorber cloaks punctures, there is an effect that the circuit is protected by the fuse and the influence on other devices is prevented and an abnormality can be easily found during maintenance and inspection.

[Brief description of drawings]

FIG. 1 is a system circuit diagram of an inverter base according to an embodiment of the present invention.

FIG. 2 is a surge absorption circuit diagram.

FIG. 3 is a sectional view and a side view of the structure of the unit.

[Explanation of symbols]

AC power source for electric base, FFB ... Fuse free breaker, COV ... Three-phase converter, 10T1 ... Contact of traveling contactor, 10T2 ... Normally open contact of traveling contactor, R1 ... Inrush current limiting resistance, FiL. C ... Smoothing capacitor, INV ... Inverter, TR ... Transformer, Si ...
Rectifier, 15B1 ... Brake opening / closing contactor contact, M
g. Br ... Magnet brake, IM ... Induction motor.

Claims (3)

[Claims] 1. A converter device comprising a rectifying element for converting a three-phase alternating current power supply into a direct current power supply, a full-wave rectifying annealer, a capacitor for maintaining a constant voltage with respect to a load change, and an inverter for converting the direct current into alternating current. Device, electromagnetic contactor for separating the converter device and inverter device, and an elevator equipped with an inrush current limiting resistance connected in parallel with the electromagnetic contactor, surge absorber device for absorbing inductive noise and lightning surge absorber device that penetrates the power supply lead wire An elevator control device characterized in that the two are housed in the same unit. 2. The elevator according to claim 1, wherein the ground line of the surge absorber device for absorbing inductive noise and the ground line of the absorber device for absorbing lightning surge that penetrate into the power line and the lighting power line are common buses. Control device. 3. The elevator control device according to claim 1, wherein a fuse is provided on the primary side of the surge absorber device for absorbing inductive noise and the surge absorber device for absorbing lightning surge that penetrates into the power supply lead-in wire.