JP2006103905A - Control device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for an elevator, capable of reducing occupied area by the device, and facilitating maintenance work. <P>SOLUTION: This control device for an elevator is provided with semiconductor modules 31-36 and reactors 51 and 52. The semiconductor modules 31-36 are forcedly cooled with air, and the reactors 51 and 52 are naturally cooled with air. Depth size is set different between a forcedly air cooled equipment part 11 including forcedly air cooled parts and a naturally cooled equipment part 12 including the reactors 51 and 52 that are naturally cooled with air. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator control device.

In general, in an elevator control device, power of a desired frequency is supplied from an external power source to a motor that drives the elevator by a power conversion circuit using a semiconductor module. And the semiconductor module which comprises a power converter circuit is a heat generating body, and when the capacity | capacitance becomes large from the restrictions of allowable temperature, it will be necessary to carry out forced air cooling. As an example of this forced air cooling, there is a configuration in which a fan is used from the back side of the control device to the heat dissipating fin portion of the cooler and exhausted to the front side (see cited document 1).
JP 2003-329553 A

  However, in the configuration of the above prior art, ventilation is not possible if there is no space on the front and back surfaces of the control panel. In addition, the fan needs to be replaced at the time of failure, and a work space is required on the back side, so that there is a problem that an area necessary for installing the elevator control device increases.

  An object of the present invention is to provide an elevator control apparatus that can reduce the installation area of the apparatus and is suitable for maintenance work.

  In order to solve the above-described problems, in the present invention, in an elevator control apparatus including a semiconductor module and a reactor, the semiconductor module is forced air-cooled, the reactor is naturally air-cooled, and the forced-air cooling including the forced air-cooling unit is performed. The depth dimension is different between the equipment portion and the natural cooling equipment portion including the natural air-cooled reactor.

  By adopting the structure and arrangement of the control device as described above, there is an advantage that the cooling efficiency can be improved, the size of the control device including the maintenance space can be reduced, and the machine room area can be reduced.

  Embodiments of an elevator control apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing an arrangement configuration of main circuit portions of a power conversion circuit in an elevator control apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. However, illustration of fine parts and wiring is omitted. FIG. 3 is a wiring diagram of the main circuit portion shown in FIG.

  1 to 3, the power conversion circuit is a circuit for supplying desired power from an external commercial power supply 91 to the elevator drive motor 92. The main circuit 1 basically includes reactors 51 and 52, a converter (forward conversion circuit) 37, a smoothing capacitor 4, and an inverter (inverse conversion circuit) 38. The converter 37 is composed of semiconductor modules 31 to 33, and the inverter 38 is composed of semiconductor modules 34 to 36. The reactors 51 and 52 serve not only as a boost converter but also as a filter together with the filter capacitor 53. Further, a reactor 54 is connected to the output of the inverter 38 in order to suppress the surge voltage of the motor 92. These filter portions are not necessarily required and may be omitted if there is no noise problem.

  An electromagnetic contactor 61 is connected to the preceding stage of the reactor 51, and an initial charging electromagnetic contactor 62 and an initial charging resistor 63 are connected in parallel with the electromagnetic contactor 61 to perform the initial charging of the smoothing capacitor 4. Further, the wiring connection with the outside of the main circuit is made by the terminal blocks 71 and 74. Furthermore, connection with other components of the semiconductor modules 31 to 36 which are forced air-cooling equipment portions is also made through the terminal blocks 72 and 73.

  Each of the semiconductor modules 31 to 36 is attached to a cooler and is forcedly cooled by air. The cooler includes a mounting plate 21, a heat radiating portion 22, and a heat pipe 23 for the semiconductor modules 31 to 36. Heat is transported from the mounting plate 21 to the heat radiating unit 22 through a coolant such as water in the heat pipe 23. The heat dissipating part 22 radiates heat by forced air cooling by a blower fan 24 with a large number of fins. The blower fan 24 is configured to take in air from the front surface of the control device and exhaust it to the back surface as indicated by arrows in FIG. An exhaust duct 25 is attached to the rear surface so that the exhaust gas flows smoothly upward. The exhaust duct 25 may be omitted if there is no problem.

  The forced air cooling device portion 11 is smaller in depth than the natural air cooling device portion 12 and has a sufficient space on the back side, so that air flows smoothly and cooling efficiency does not decrease.

  In the example of FIGS. 1 and 2, four smoothing capacitors 41 to 44 are configured, and the connection to the semiconductor modules 31 to 36 is made by the laminated conductor 40.

  Further, gate drive circuits 301 and 302 for driving the semiconductor modules 31 to 36 are attached to the side of the heat radiating portion as shown in FIG. This is because the space is vacant, and other places may be used, but the vicinity of the heating element is not so preferable because of the influence of an increase in ambient temperature.

  On the other hand, reactors 51, 52, and 54, a filter capacitor 53, electromagnetic contactors 61 and 62, an initial charging resistor 63, and terminal blocks 71 to 74 are attached to the natural cooling device portion 12. As shown in FIG. 3, the initial charging resistor 63 is composed of three resistors, but may have a structure in which a plurality of resistors are integrated. Reactors 51, 52, and 54 also generate heat, but not as much as semiconductor modules 31 to 36, and since the allowable temperature is high, natural cooling is sufficient.

  However, by providing an exhaust hole a in a portion where the forced air cooling device portion 11 is not on the natural cooling device portion 12, the air can be smoothly exhausted as indicated by a broken line arrow in FIG. 2.

  Further, the forced air cooling portion 11 is provided with a wheel 13 and is structured to be movable back and forth by a rail 14. The rail is provided with stoppers 15 at the front and rear to prevent it from falling off. In addition, although the forced air cooling part 11 is fixed on a rail during driving | operation, illustration about the details, such as a fixing method, was abbreviate | omitted.

  FIG. 4 is an overview diagram during maintenance work. FIG. 4 shows a state in which the forced air cooling device portion 11 is slid rearward during maintenance work and the front door 111 is open. In this way, not only the passage but also the part in front of the forced air cooling device part 11 can be used as a work space, so that workability is improved. In addition, although it was set as the structure where two doors open from the center here, it is not the limitation.

  When sliding back and forth, the wiring connecting the upper and lower portions may be removed by the terminal blocks 72 and 73, or depending on the case, it may not be removed by leaving a margin for sliding. In that case, the terminal blocks 72 and 73 may be removed and the components may be wired together.

  In addition, the code | symbol 112 represents the ventilation opening, and this part has many holes or is like a net | network.

  A second embodiment of the present invention is shown in FIGS. FIG. 5 is a front view showing the arrangement of the main circuit portion of the power conversion circuit in the elevator control apparatus according to the second embodiment of the present invention, and FIG. 6 is a side view of FIG.

  In this embodiment, the semiconductor modules 31 to 36 are attached to the heat sinks 201 to 206 one by one and cooled. The heat sinks 201 to 206 are composed of a base surface to which the semiconductor modules 31 to 36 are attached and fins, and are cooled by forced air cooling by sending air to the fin portions from the front to the back of the apparatus by a fan. The other parts have the same functions as in the example of FIG. In the example of FIG. 5, the depth dimensions of the forced air cooling device portion 11 and the natural cooling device portion 12 are not different from those in the case of FIG.

  7 and 8 are configurations in which the elevator control device shown in FIG. 1 or FIG. 5 is arranged on a machine beam, FIG. 7 is a perspective view, and FIG. 8 is a front view. 1 and 5, the upper forced air cooling device portion 11 is positioned on the machine beam 93, and the lower natural air cooling device portion 12 is positioned between the machine beams 93. By doing so, the problem of the height of the elevator control device can be solved. Further, if a floor plate 94 is provided between the machine beams 93 in front of the elevator control device, the workability during maintenance can be improved. Reference numeral 81 denotes a signal circuit unit provided in the vicinity of the forced air-cooling device part 11.

  Further, the wiring between the forced air cooling device portion 11 and the natural cooling device portion 12 between the machine beams 93 is covered with a wiring housing 75. By electrically connecting these cases, noise caused by the wiring conductor can be reduced.

  Here, the entire natural cooling device portion 12 is placed between the machine beams 93, but only a portion thereof may be used. For example, when the capacity of the elevator becomes large, the current supplied to the motor increases, so that each component becomes large. In such a case, although not shown, only the reactor 54 connected to the motor side among the three reactors in FIG. 1 can be placed between the machine beams 93. At this time as well, noise reduction is achieved by covering the wiring conductors of the inverter part and the reactor part with a casing having the same potential as the control device casing. In this case, since the reactor 54 is also wired to the motor 92 of the hoisting machine, the reactor 54 is arranged between the elevator control device and the motor, but from the viewpoint of noise reduction, it is closer to the elevator control device. Is good.

  Next, an embodiment in which a plurality of elevator control apparatuses according to the present invention are arranged will be described.

  In FIG. 9, two control devices are arranged back to back. Each control device includes a signal circuit unit 81A or 81B, a forced air cooling unit 11A or 11B, and a self-cooling unit 12A or 12B. One control unit is composed of alphabets having the same code end.

  The signal circuit unit is a part related to elevator control other than the power conversion circuit, and is mainly composed of a printed circuit board, a relay, and the like, and generates a small amount of heat.

  The main circuit part has a forced air cooling part and ventilates as shown. With the arrangement shown in FIG. 9, exhausts from the main circuit unit do not interfere with each other, so that the air can be smoothly ventilated, the cooling efficiency does not decrease, and the heat load is also distributed. Further, since the signal circuit part (for example, 81A) and the main circuit part (11A and 12A) of one control device are arranged in the same front direction, the maintenance work efficiency is not lowered.

  As a third embodiment of the present invention, a case where a matrix converter is applied to a power conversion circuit portion will be described. FIG. 10 shows a circuit configuration of the matrix converter. The matrix converter is a power conversion circuit that supplies AC power directly from the AC power supply 91 to the motor 92, and is composed of nine bidirectional switches. Here, an example is shown in which the bidirectional switch includes reverse blocking devices 3101 and 3102 having reverse breakdown voltage, and the matrix converter includes one semiconductor module 310. However, the present invention is not limited thereto. An LC filter including a reactor 55 and a capacitor 56 is connected between the power supply 91 and the semiconductor module 310 to reduce power supply harmonics and jumping voltage by switching operation.

  Even in this case, the semiconductor module 310 is a heating element and needs to be forcedly air-cooled due to the restriction of the allowable temperature. Therefore, by arranging the semiconductor module 310 constituting the matrix converter in the forced air cooling device portion 11 of FIGS. 1 and 2 and arranging the reactor 55 in the natural air cooling device portion 12, the same effect as in the case of FIGS. Is obtained.

  As a fourth embodiment of the present invention, an example in which a power conversion circuit including not only the external power supply 91 but also the secondary battery 96 and the step-up / step-down circuit is applied will be described. FIG. 11 shows a circuit configuration in this case. In FIG. 11, the rectifier circuit 39 composed only of a diode is connected between the external power supply 91 and the smoothing capacitor 4.

  The secondary battery 96 is connected to the smoothing capacitor 4 via a reactor 97 and a step-up / down circuit 98, and the elevator is powered in parallel from the external power source 91 and the secondary battery 96 when powering, and the secondary battery 96 is connected during regeneration. It is configured to charge.

  Even in this case, since the rectifier circuit 39, the inverter 38, and the step-up / step-down circuit 98 are constituted by semiconductor modules, it is necessary to perform forced air cooling. Therefore, by arranging these semiconductor modules in the forced air cooling device portion 11 and the reactor 97 in the natural air cooling device portion 12, the same effect as in the case of FIGS.

It is a front view which shows the arrangement configuration of the main circuit part of the power converter circuit in the control apparatus of the elevator which becomes one Embodiment of this invention. It is a side view of FIG. It is a wiring diagram of the main circuit part shown in FIG. It is a general-view figure at the time of maintenance work. It is a front view which shows the arrangement configuration of the main circuit part of the power converter circuit in the control apparatus of the elevator which becomes the 2nd Embodiment of this invention. FIG. 6 is a side view of FIG. 5. It is the perspective view which has arrange | positioned the control apparatus of the elevator shown in FIG. 1 or FIG. 5 to the machine beam. FIG. 8 is a front view of FIG. 7. It is a top view which shows the example of multiple arrangement | positioning of the control apparatus regarding this invention. It is a circuit block diagram of the matrix converter applicable to this invention. It is a circuit block diagram of the secondary battery combined use applicable to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main circuit part 11 Forced air cooling equipment part 12 Natural air cooling equipment part 21 Mounting plate 22 Cooler heat radiating part 23 Heat pipe 24 Blower fan 31-36 Semiconductor module 37 Converter (forward conversion circuit)
38 Inverter (inverse conversion circuit)
39 Rectifier circuit 310 Matrix converter semiconductor module 41-44 Smoothing capacitor 51, 52, 54 Reactor 61, 62 Electromagnetic contactor 63 Initial charging resistance 71-74 Terminal block 75 Wiring housing 91 Power supply 92 Motor 93 Machine beam 96 Secondary battery 97 Reactor 98 Buck-Boost circuit

Claims (9)

In an elevator control device having a semiconductor module and a reactor,
The semiconductor module is forced air-cooled, the reactor is natural air-cooled, and the depth dimension is different between the forced air-cooling device part including the forced air-cooling part and the natural cooling device part including the natural air-cooled reactor. Elevator control device.   The control device for an elevator according to claim 1, wherein cooling air of the forced air-cooling device portion is flowed in the depth direction.   3. The elevator control device according to claim 1, wherein the forced air cooling device portion is positioned above the natural air cooling device portion. 4.   The elevator control device according to any one of claims 1 to 3, wherein the casing for storing the forced air-cooling device portion and the casing for storing the natural air-cooling device portion are different from each other.   The elevator control device according to claim 4, wherein the forced air-cooling device portion is movable in the depth direction.   6. The forced air cooling device portion and the natural air cooling device portion are arranged so as to substantially coincide with each other during operation, and the forced air cooling device portion is moved rearward during maintenance inspection. Elevator control device.   2. The elevator control according to claim 1, wherein at least a part of the natural air cooling device part is installed in a machine base for installing a hoisting machine or in an area surrounded by a machine beam and a machine room floor. apparatus.   8. The elevator control apparatus according to claim 7, wherein a reactor of the natural air cooling device portion is installed in an area surrounded by the machine base or a machine beam and a machine room floor.   9. The elevator control apparatus according to claim 8, wherein a wiring connecting the reactor and other components is covered with a conductive enclosure.

Images