JP2014009075A - Elevator system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize electric power energy obtained by individual elevator units.SOLUTION: An elevator system comprises: unit correspondence main circuit power sources 2n that convert a customer AC power source into DC power by using PWM converters receiving control signals of unit controllers and a plurality of diode converters not receiving the control signals, convert the DC power converted into desired AC power by unit correspondence inverters and drive individual unit motors; unit power source connection means for selectively turning ON DC link contacts 6n through which common DC bus bars 7P and 7N are individually connected among DC power source lines of individual main circuit power sources 2n by instructions from an outside; and a multiple units controller 5 that determines powering operation or regenerative operation of individual units on the basis of a magnitude relation among DC power source voltages of the individual main circuit power sources 2n, selectively turns ON the DC link contacts 6n in response to the powering operation or the regenerative operation of the individual units determined and accommodates and controls powering energy and regenerative energy among the units.

Description

  Embodiments of the present invention relate to an elevator system that exchanges power energy between a plurality of elevators.

  In general, a main circuit power supply in an elevator system is smoothed by a converter that converts AC power from a commercial AC power supply into DC power, a smoothing capacitor that smoothes DC power (voltage) converted by the converter, and the smoothing capacitor. An inverter for converting the DC power into variable voltage and variable frequency AC power, and controlling the rotational speed of the hoisting motor while changing the AC voltage and frequency output from the inverter, It is the structure which raises / lowers a passenger car.

  Conventionally, in an elevator system including a plurality of elevators, several power utilization techniques have been proposed in order to effectively use the power energy of the entire system.

  In this elevator system, the power utilization technology is such that a plurality of elevators equipped with smoothing capacitors and inverters are connected in parallel to the output terminal of a converter that converts AC power from a commercial AC power source into DC power. The DC power is supplied to a plurality of elevators in parallel.

  Another power utilization technique is to install a new power generation source (for example, a solar cell module) in addition to a commercial AC power source, and use power energy obtained from this power generation source for operation of the elevator. In addition, when the electric power energy obtained with the electric power generation source is surplus, it regenerates to the commercial AC power source side, and reduces the energy of the commercial AC power source.

  However, the former power utilization technology increases the installed capacity of the converter, and increases in cost and size are inevitable. In addition, the regenerative energy of the regenerative unit is used for the operation of the power unit only when there is a regenerative unit and a power unit, and the powering energy and regenerative energy cannot be interchanged between multiple elevators. Absent.

  The latter type of power utilization technology uses a power source such as a solar cell separately from a commercial AC power source, and uses the power energy generated by the added power source for supplementary equipment. , To reduce the power of commercial AC power supply. Therefore, the power energy of the existing power source is not effectively used, and the power energy is not interchanged between a plurality of elevators.

JP 2010-168154 A International Publication No. 98/25849 Pamphlet

  The problem to be solved by the present invention is that the DC power generated by the main circuit power supply is shared by a plurality of elevators, and the regenerative energy and powering energy are mutually interchanged between the plurality of elevators. An object of the present invention is to provide an elevator system that increases the use efficiency of electric power energy.

  In order to solve the above-described problems, an elevator system according to an embodiment is compatible with each unit control device that outputs a switching control signal, and a customer AC power supply that receives at least one unit that receives the switching control signal of the unit control device. A DC converter using a PWM converter and a diode converter compatible with a plurality of units that does not receive the switching control signal, and an inverter corresponding to the unit that receives the switching control signal of the unit control device is converted to DC power. A common DC bus is connected via a DC link switch between the main circuit power supply for each unit that converts the desired AC power to the desired motor and drives the corresponding motor for each unit, and the DC power line of each main circuit power supply for each unit, Unit power supply connection means to selectively turn on the DC link switch in response to instructions from the outside, and each Based on the magnitude relationship of the DC power supply voltage of the circuit power supply, the power running / regeneration of each unit is determined, and the DC link switch is selectively turned on according to the determined power running / regeneration state of each unit. This is an elevator system provided with a multiple unit control device that controls interchange of powering energy and regenerative energy between units.

The schematic block diagram of the elevator system which concerns on 1st Embodiment. The figure which shows the example of 1 structure of a multiple machine control apparatus. The data array example figure of a machine management table. The flowchart explaining the flow of a series of processes in the elevator system which concerns on 1st Embodiment. The schematic block diagram of the elevator system which concerns on 2nd Embodiment. The flowchart explaining the flow of a series of processes in the elevator system which concerns on 2nd Embodiment. The schematic block diagram of the elevator system which concerns on 3rd Embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)
The first embodiment includes, for example, an elevator to which a PWM converter is applied and an elevator to which a diode converter is applied, and an elevator that creates a relationship in which each elevator selectively shares a DC power supply portion of a main circuit power supply. System.

  FIG. 1 is a schematic configuration diagram of an elevator system according to a first embodiment including, for example, four elevator cars (hereinafter simply referred to as “cars”).

  The elevator system includes a plurality of main circuit switches 1-1 to 1-4 corresponding to the number of units, main circuit power sources 2-1 to 2-4 corresponding to the units, and these main circuit power sources 2-1 to 2-4. The unit control devices 3-1 to 3-4 that control the operation by sending a switching control signal (gate signal) to each other, and the switching control signals (gate signals) from the respective unit control devices 3-1 to 3-4 In addition, the hoist is driven to rotate by receiving AC power having a desired AC voltage and frequency output from the main circuit power supplies 2-1 to 2-4 corresponding to the above-mentioned unit, and moving a car (not shown) up and down. This is a configuration that includes AC motors 4-1 to 4-4 for the machine and a multiple machine control device 5.

  The multi-unit control device 5 may be referred to as a controller, a general control device, a group management control unit, or a group management control device. All shall be included.

  The plurality of main circuit switches 1-1 to 1-4 are connected to a customer power supply (commercial AC power supply), and by turning on each switch, the customer circuit power supply is connected to the main circuit power supply 2-1 to the elevator corresponding to the customer power supply. 2-4.

  The main circuit power supplies 2-1 to 2-4 use the AC power of the customer power supply to convert the AC power into a variable AC voltage and a variable frequency AC power for each unit, and to each AC motor 4-1 to 4-4. It is a power conversion part supplied as drive power.

  The main circuit power supplies 2-1 to 2-4 are a PWM converter 21-1 applied to the first elevator and a diode converter 21-2 to 21-4 applied to the second elevator to the fourth elevator and a smoothing capacitor 22-1. 22-4, inverters 23-1 to 23-4 configured by semiconductor switching elements, and surplus energy absorption circuits 24-1 (Q1) to 24-4 (Q4) are provided.

  The PWM converter 21-1 is connected to the main circuit switch 1-1, and has an orthogonal (forward / reverse) conversion function capable of regenerative braking toward the customer power supply side. That is, the PWM converter 21-1 has a bidirectional characteristic of power running / regeneration, and has a role as a converter during power running operation.

  The PWM converter 21-1 converts AC power supplied through the main circuit switch 1-1 into DC power, and the unit DC power supply lines 25-1a, b (25-1a, b are 25-1a and 25-1b). Hereinafter, the same is applied to 25-2a, b to 25-4a, b).

  The diode converters 21-2 to 21-4 are individually connected to the main circuit switches 1-2 to 1-4, respectively, and convert AC power from the customer power source to DC power, and corresponding unit DC power line 25- 2a, b to 25-4a, b.

  Smoothing capacitors 22-1 to 22-4 smooth the DC power (DC voltage) converted by each converter 21-1 to 21-4.

  In the inverters 23-1 to 23-4, the semiconductor switching elements are ON / OFF controlled in accordance with switching control signals (gate signals) output from the machine control devices 3-1 to 3-4, and the smoothing capacitors 22-1 to 22-22 are controlled. The DC voltage smoothed at -4 is converted into AC power having a desired variable AC voltage and variable frequency, and supplied to the AC motors 4-1 to 4-4 that move the elevator car (not shown) up and down. .

  DC link contacts (DC link switches) 6-1 to 6-4 having two contacts forming a pair are interposed between each unit DC power supply line 25-1a, b to 25-4a, b. A common DC bus 7P is connected to one contact side of the contacts 6-1 to 6-4, and a common DC bus 7N is connected to the other contact side.

  Between the common DC buses 7P-7N, an inter-bus DC voltage detector 8-0 is provided, and between the DC power supply lines 25-1a, 25 to 25-4a, b, the DC power supply voltage detectors are provided. 8-1 to 8-4 are provided. The DC voltages (voltage monitoring signals) detected by these voltage detectors 8-0 to 8-4 are sent to the multi-unit control device 5.

  As shown in FIG. 2, the multi-unit control device 5 includes an input unit 51 such as a keyboard / pointing device for inputting various data, program data and necessary control instructions, a program data storage unit 52 composed of a ROM, An auxiliary storage device 53 that stores various data necessary for control, a multiple-unit control processing unit 54 configured by a CPU, and a display unit 55 are provided.

  For example, as shown in FIG. 4, the program data storage unit 52 stores an energy interchange control program that defines the flow of energy interchange processing of a plurality of units.

  The auxiliary storage device 53 is provided with, for example, a data setting unit 53a in which the rated voltage Vdr of the DC power supply is set, a delay timer 53b that generates an energy consumption determination time, a unit management table 53c, and the like.

  In the unit management table 53c, as shown in FIG. 3, the multiple unit control processing unit 54 determines the power running state and regenerative state of each unit, and each unit sets “0” data for power running and “1” for regeneration. It is a table to do.

  The multiple machine control processing unit 54 functionally includes a power running / regeneration determining unit 54A and a multiple machine control processing unit 54B.

  The power running / regeneration determining means 54A is connected between the DC power supply lines 25-1a, b to 25-4a, b (voltage monitoring signals) Vd1 to Vd4 and the unit control devices 3-1 to 3-4. The power running and regenerative states of each unit are determined using the unit operation control signals exchanged in step.

  The plurality of units control processing means 54B controls interchange of regenerative energy and powering energy among a plurality of units, and includes contact operation means 54Ba, converter operation control means 54Bb, and energy utilization means 54Bc.

  The contact operating means 54Ba selectively turns on each unit DC link contact 6-1 to 6-4 according to the regenerative state of each unit, and each unit is connected to the DC power supply line 25-1a, b to 25-4a. , B has a function of setting a state in which the regenerative energy appearing between b can be shared.

  The converter operation control means 54Bb performs reverse conversion (customer power regeneration) or forward conversion (original converter function) with respect to the PWM converter 21-1 having bidirectional characteristics of power running / regeneration according to whether all units are regenerated. A function of giving a PWM converter operation command for performing

  The energy utilization means 54Bc selectively turns on / off the DC link contacts 6-1 to 6-4 of each unit according to the power running and regeneration state of each unit, and generates regenerative energy and power running energy among a plurality of units. It has a function of effectively using regenerative energy by controlling interchange of each other.

  The number of elevators to which the PWM converter is applied and the number of elevators to which the diode converter is applied are not limited to the example in FIG. 1 and may be a combination of arbitrary numbers.

(1) Next, the operation of the elevator system according to the first embodiment will be described with reference to FIG. Here, a series of processing procedures in which the multiple machine control device 5 exchanges power running energy and regenerative energy between each machine in accordance with an energy interchange control program stored in the program data storage unit 52 to effectively use power energy. Will be described.

  When the operation starts, the multiple machine control device 5 reads the energy interchange control program from the program data storage unit 52, stores it in an appropriate area (work memory) of the auxiliary storage device 53, and executes the power running / regeneration determination means 54A. To do.

  The power running / regeneration determining means 54A of the multiple unit control device 5 includes a DC voltage Vd1 between the unit DC power supply lines 25-1a, b-25-4a, b detected by the voltage detectors 8-1 to 8-4. After acquiring Vd4 and temporarily storing it in the auxiliary storage device 53 (S1), it is determined whether each unit is powering or regenerating (S2).

  Specifically, the determination of power running / regeneration is based on the unit operation control signals for the unit control devices 3-1 to 3-4, and each unit elevator is moving up and down, and is temporarily stored in the auxiliary storage device 53. The DC voltages Vd1 to Vd4 corresponding to the respective units are compared with the DC power supply rated voltage Vdr set in the data setting unit 53a of the auxiliary storage device 53. As a result of this comparison, when each unit is moving up and down and the DC voltages Vd1 to Vd4 are less than or equal to the rated voltage Vdr, the corresponding unit is determined to be powering. On the other hand, when each unit is moving up and down and the DC voltages Vd1 to Vd4 exceed the rated voltage Vdr, the corresponding unit is determined to be regenerative. The determination result is stored in the number machine management table 53c as shown in FIG.

That is, while the corresponding machine is moving up and down, Vdn (n = 1 to 4) ≦ Vdr.
While the corresponding machine is moving up and down, Vdn (n = 1 to 4)> Vdr ... Regenerative operation.

  Next, the multiple machine control device 5 executes the contact operation means 54Ba. The contact operating means 54Ba determines which of the DC link contacts 6-1 to 6-4 is turned on / off.

  First, the contact operating means 54Ba determines whether all the units are powered by the unit management table 53c (S3). If all units are powered, it is determined that it is difficult to interchange power energy with all units, and all DC link contacts 6-1 to 6-4 are turned off (S4).

  When it is determined in step S3 that all the units are not in power running, the contact operating unit 54Ba turns on only the DC link contacts corresponding to the regenerative unit, for example, DC link contacts 6-1 and 6-4 based on FIG. S5). Further, the contact operating means 54Ba determines whether or not all the units are regenerative after the DC link contact corresponding to the regenerative unit is turned on (S6).

  The multiple machine control device 5 executes the converter operation control means 54Bb in order to reflect the determination result of step S6. That is, the converter operation control means 54Bb determines that the power running machine and the regenerative machine are mixed when all the cars are not regenerative, and issues an operation command for stopping the regenerative switching operation to the PWM converter 21-1. Sending out (S7), utilizing the original forward conversion (converter) function.

  On the other hand, the converter operation control means 54Bb sends an operation command for starting the regenerative switching operation to the PWM converter 21-1 when it is determined that all units are regenerated from the determination result of step S6 (S7). The reverse conversion function for regenerating to the power source side is utilized (S8).

  The multiple machine control device 5 executes the energy utilization means 54Bc after the forward / reverse conversion of the PWM converter 21-1.

  After utilizing the original forward conversion (converter) function for the PWM converter 21-1 (S7), the energy utilization unit 54Bc refers to the machine management table 53c in FIG. 3 to determine whether the first machine is a regenerative machine. (S9).

  For example, when the energy utilization means 54Bc determines that the first unit is not a regenerative unit, the other unit other than the first unit is a regenerative unit. Therefore, in order to use the regenerative energy of the regenerative unit, it corresponds to the first unit The DC link contact 6-1 is turned on (S10).

  On the other hand, the energy utilization means 54Bc turns on the DC link contact 6-2 corresponding to the power running machine according to the machine management table 53c when determining that the machine 1 is the regenerative machine, for example (S11), and regenerates at least the first machine. Energy will be used for Unit 2 power running. If the first machine is a regenerative machine, the DC link contact 6-1 has already been turned on in step S5.

  The energy use means 54Bc activates the delay timer 53b of the auxiliary storage device 53 after turning on the DC link contact 6-1 or 6-2 in step S10 or S11 in order to use the regenerative energy, and sets a predetermined delay. Time is measured (S12).

When the delay timer 53b reaches the delay time, the energy utilization unit 54Bc has a magnitude relationship between the DC voltage Vd1 (same as the common bus voltage Vd0) detected by the DC power supply voltage detector 8-1 and the rated voltage Vdr. Are compared (S13). Here, if Vd1 ≦ Vdr, the power running operation of the first unit by S10 or the power running operation of the other unit by S11,
Judge that regenerative energy is consumed.

  If Vd1> Vdr, the energy utilization unit 54Bc proceeds to step S14 and determines whether the DC link contacts 6-1 to 6-4 corresponding to all the power running machines are on. If it is not turned on, the process proceeds to step S11, the DC link contact 6-3 corresponding to the third power unit in the next powering operation is turned on according to the unit management table 53c, and the same processing is repeated. (S12 to S14) When the DC link contacts 6-1 to 6-4 of all the power running machines are turned on and Vd1> Vdr, the process proceeds to step S8.

  In step S8, the converter operation control means 54Bb is executed as described above. That is, the converter operation control means 54Bb determines whether all the units are regenerative (S6) or when all the DC link contacts 6-1 to 6-4 are on (S14), It is determined that it has not been consumed, and an operation command for starting regenerative switching of the PWM converter 21-1 is sent (S8), and a No. 1 operation control signal is sent to the No. 1 controller 3-1. Thereby, the remaining regenerative energy is regenerated to the customer power supply side.

  That is, the energy utilization unit 54Bc reverse-converts the PWM converter 21-1, and then activates the delay timer 53b to measure a predetermined time (S15).

  The energy utilization means 54Bc compares the magnitude relationship between the DC voltage Vd1 (same as the common bus voltage Vd0) detected by the DC power supply voltage detector 8-1 and the rated voltage Vdr when the delay timer 53b measures a predetermined time. (S16). Here, if Vd1 ≦ Vdr, it is determined that the regenerative energy has been consumed.

  If the energy utilization means 54Bc does not satisfy Vd1 ≦ Vdr, the energy utilization means 54Bc determines that the regenerative energy has not yet been consumed, activates the surplus energy absorption circuit 24-1 (Q1) having resistance, and is excessive. Energy is consumed (S17). Then, after the surplus energy absorption circuit 24-1 is activated, the surplus energy absorption circuits 24-2, 24-3,... Are sequentially increased until Vd1 ≦ Vdr (S18, S16).

  Finally, if there is a unit that is suspended, the DC link contact corresponding to the suspended unit is turned off (S19), and then the process returns to step S1 and the same process is repeated.

  Therefore, according to the embodiment as described above, by turning on the DC link contact of the regenerative machine, another power running machine is generated in a state where it can be selectively shared. And when the DC link contact corresponding to another power running machine is turned on, interchange of power running energy and regenerative energy is performed between the relevant machines. At this time, the utilization state of the regenerative energy is confirmed by monitoring the magnitude relationship between the DC voltage of the main circuit power supply 2-1 and the rated voltage.

  Further, when the regenerative energy cannot be consumed by the power unit and surplus energy is generated, or when the PWM converter 21-1 is in a regenerative overload state, the surplus energy absorption circuits 24-1 to 24-4 are sequentially activated. To consume.

(2) Next, a series of processing procedures in the multiple unit control device 5 has been described. Hereinafter, an example of operation of a DC link contact or the like will be described in order, divided into power running and regenerative operation states of the multiple unit.

(I) When all units are powered (Units 1-4: Powering)
The multiple unit control device 5 turns off the DC link contacts 6-1 to 6-4 corresponding to all the units, and does not interchange power energy between the units.

(B) When powering and regenerators are mixed (for example, Units 1 and 4: Regeneration, Units 2 and 3: Powering, see Figure 3)
The multiple machine control device 5 turns on the DC link contacts 6-1 and 6-4 corresponding to the regenerative machine (S5). Since the DC voltage of the DC power lines 25-1a, b, 25-4a, b of the corresponding machine is the same, it is simply turned on and there is no problem.

  When the first unit is a regenerative unit, the multiple unit control device 5 first stops the regenerative switching of the PWM converter 21-1, and uses the regenerative energy of the first unit as a DC link contact 6 corresponding to the second unit that is a power running unit. 2 is turned on and a process for using regenerative energy is executed (S11). Then, after a predetermined time, the direct-current voltage Vd1 is compared with the rated voltage Vdr, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy of the first unit can be recovered by the power unit that is the second unit (S13). , Maintain this regenerative energy interchange.

  If Vd1> Vdr, the multiple unit control device 5 determines that the regenerative energy is still remaining, and turns on the DC link contact 6-3 corresponding to another power running unit in steps S13 to S14 (S11). . Then, after a predetermined delay time, if Vd1 ≦ Vdr, it is determined that all of the regenerative energy of Unit 1 can be recovered by powering Units 2 and 3 (S13), and this regenerative energy interchange state is maintained. To do.

  However, if the Vd1> Vdr, the multi-unit control device 5 determines that the regenerative energy still remains, starts the regenerative switching of the PWM converter 21-1 (S8), and brings the regenerative energy to the customer power source side. Regenerate.

  The multiple unit control device 5 determines that all regenerative energy has been regenerated to the second and third units and the customer power supply side if Vd1 ≦ Vdr after a predetermined delay time. To maintain. Here, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

(C) When the power and regenerators are mixed (Units 1-2: Powering, Units 3.4: Regeneration)
The multiple machine control device 5 turns on the DC link contacts 6-3 and 6-4 corresponding to all the regenerative machines (S5). Since the DC voltage of the DC power supply 25-3a, b, 25-4a, b of the corresponding machine is the same, it is simply turned on and there is no problem.

  When the first unit is a power running unit, the multiple unit control device 5 first stops the regenerative switching of the PWM converter 21-1, performs forward conversion, and then turns on the DC link contact 6-1 (S10). An energy use process is executed (S12 to S14, S11). That is, if Vd1 ≦ Vdr after a predetermined time, it is determined that all of the regenerative energy has been recovered by the powering machine that is the first machine (S13), and this regenerative energy accommodation state is maintained.

  If Vd1> Vdr, the multiple unit control device 5 determines that the regenerative energy is still present, and turns on the DC link contact 6-2 corresponding to another power unit through steps S13-S14 (S11). . Then, after a predetermined time has elapsed, if Vd1 ≦ Vdr, it is determined that all of the regenerative energy has been recovered by the powering No. 1 and No. 2 units (S13), and this regenerative energy accommodation state is maintained.

  If Vd1> Vdr, the multiple unit control device 5 determines that the regenerative energy is still present, starts regenerative switching of the PWM converter 21-1 corresponding to the first unit (S8), and regenerates to the customer power source. Further, if Vd1 ≦ Vdr after a predetermined delay time, it is determined that all the regenerative energy has been regenerated to the first and second machines and the customer power supply, and the regenerative energy is maintained in an interchangeable state.

  However, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

(D) When all units are regenerated (Units 1-4: Regeneration)
The multiple machine control device 5 turns on the DC link contacts 6-1 to 6-4 corresponding to all the cars (S5, S6). Since the DC power lines 25-1a, b to 25-4a, b of the corresponding unit have the same DC voltage, there is no problem in simply turning them on.

  Thereafter, the multi-unit control device 5 starts regenerative switching of the PWM converter 21-1 (S8) and regenerates to the customer power supply. If Vd1 ≦ Vdr after a predetermined delay time, it is determined that all of the regenerative energy has been regenerated to the customer power supply, and the regenerative energy is maintained in an interchangeable state.

  However, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

  Therefore, according to the embodiment as described above, after the DC link contact of the regenerative unit is turned on, the DC link contact corresponding to the other power running unit is turned on, and the first unit DC voltage Vd1 and the rated voltage Vdr are compared. If Vd1> Vdr, it is determined that the regenerative energy is still surplus, the DC link contacts of the power unit are sequentially turned on, the regenerative energy is sequentially passed to the power unit, and the regenerative energy is surplus. Starts regenerative switching of the PWM converter 21-1 and regenerates to the customer power supply side, so that the regenerative energy can be used efficiently.

  In addition, when the multiple unit control device 5 cannot generate regenerative energy and generates surplus energy, or the PWM converter 21-1 is in a regenerative overload, the plural energy control circuits 24-1 to 24-4 are provided. It can be consumed by operating sequentially.

  In addition, the multi-unit control device 5 sequentially turns on the DC link contacts of the power running unit and passes the regenerative energy to the power running unit. However, the DC detection is performed after a predetermined delay time has elapsed after turning on the DC link contact of the power running unit. Since the magnitude relationship between the voltage Vd1 and the rated voltage Vdr is determined, the digestion state of surplus regenerative energy can be accurately grasped.

  In the present embodiment, a delay timer 53b is provided, and after a predetermined time is measured, the magnitude relationship between the DC detection voltage Vd1 and the rated voltage Vdr is determined. However, since the series of processes shown in FIG. 4 is repeatedly executed, the measurement time of the delay timer 53b is cleared before the series of processes is executed or at a predetermined stage of the series of processes, and a predetermined start command is issued. It shall be prepared for a state where it can be quickly activated when given.

(First other embodiment)
(1) In the above embodiment, the magnitude relationship between the DC voltage Vd1 of the main circuit power supply 2-1 and the rated voltage Vdr is determined and the consumption state of regenerative energy is determined. In order to eliminate the operation, the magnitude relationship between the voltages Vd1 and Vdr may be determined by providing a hysteresis characteristic in advance.

(2) Although the above embodiment has been described on the assumption of the configuration shown in FIG. 1, for example, the number of units, the number of combinations of PWM converter 21-1 and inverter converters 21-2 to 21-4, DC link contact 6-1. Even if the turn-on order of ˜6-4 and the turn-on order of the surplus energy absorption circuits 24-1 to 24-4 are different, the regenerative energy is efficiently used by applying substantially the same processing procedure as the process shown in FIG. be able to.

(3) Of the multiple units, for units that do not share DC power, such as stopped units, breakdown units, maintenance units, and outage units, no processing is performed for the corresponding units, and DC link contacts corresponding to the corresponding units are provided. Turn off.

  Further, when each unit wants to operate independently, the DC link contacts 6-1 to 6-4 corresponding to each unit are all turned off to turn off the common DC buses 7P and 7N and the DC power supply line 25- corresponding to each unit. You may make it isolate | separate 1a, b-25-4a, b, and make each unit operate independently.

(Second Embodiment)
FIG. 5 is a schematic configuration diagram of an elevator system according to the second embodiment.

  In the second embodiment, the storage battery 32 is added via the charge / discharge converter 31 between the common DC buses 7P and 7N described in the first embodiment. In addition, charge / discharge control means 54Bd is added to the multiple machine control device 5.

  The charge / discharge control means 54Bd sends a charge / discharge command to the charge / discharge converter 31, causes the regenerative energy of the main circuit power supplies 2-1 to 2-4 to be stored in the storage battery 32, or the power stored in the storage battery 32. It has a function of reducing and discharging energy to the common DC buses 7P and 7N.

  Since the rest of the configuration is almost the same as in FIG. 1, the same or equivalent components are all given the same reference numerals as in FIG.

  It should be noted that the charging current upper limit value of the storage battery 32 is set in advance in the data setting unit 53a of the auxiliary storage device 53 of the multiple unit control device 5, and the multiple unit control device 5 is controlled so as not to charge beyond the charging current upper limit value. To do. The data setting unit 53a or the unit management table 53c defines the load capacity of each unit as required.

(1) Next, with reference to FIG. 6, a series of processing procedures for operating by increasing the energy efficiency by using the multiple unit control device 5 with the power running energy and the regenerative energy interchanged between each unit will be described. .

  The second embodiment is performed according to substantially the same processing procedure as that of the first embodiment (see FIG. 4). A particularly different point is that a charge / discharge control process for the storage battery 32 is added.

  First, the multiple machine control device 5 executes the power running / regeneration determining means 54A. Since the process (steps S1 and S2) of the power running / regeneration determination unit 54A is the same as that in the first embodiment, the description is given here with reference to FIG.

  Subsequently, the multiple machine control device 5 executes the contact operation means 54Ba. The contact operating means 54Ba decides to turn on / off the DC link contacts 6-1 to 6-4 of any unit based on the power running / regeneration determination result of each unit, and determines the regeneration / power running energy of each unit. Selectively share between each unit.

  That is, the contact operating means 54Ba determines whether or not all the units are powered by the unit management table 53c (S3). Here, if all the units are in power running, the DC link contact corresponding to the power running unit having the largest load capacity among the unit load capacity set in the data setting unit 53a or the like, for example, 6-2 is turned on (S21).

  Furthermore, the charge / discharge control means 54Bd of the multi-unit control processing unit 54 sends a discharge command to the charge / discharge converter 31 to perform discharge control. As a result, the energy stored in the storage battery 32 is voltage-converted by the charge / discharge converter 31 and output to the common DC buses 7P and 7N, which is used for the operation of the power running machine having the largest load capacity (S22). In addition, although it was set as the power running number machine with the largest load capacity as a discharge object number machine, arbitrary numbers machine may be sufficient.

  Further, the multiple-unit control processing unit 54 determines that all the units are regenerated at step S6 or DC link contacts 6-1 to 6 corresponding to all the power units when the regenerative energy is not consumed at step S14. When -4 is determined to be in the ON state, the charge / discharge control means 54Bd is executed.

  As shown in FIG. 4, the charge / discharge control means 54Bd sends a charge command to the charge / discharge converter 31 prior to the start of regenerative switching of the PWM converter 1-1 (S8), and the regenerative energy that has not yet been consumed. While charging the storage battery 32 (S23), the energy utilization means 54Bc is executed and the delay timer 53b is started.

  When the delay timer 53b measures a predetermined time (S24), the energy utilization unit 54Bc compares the magnitude relationship between the DC voltage Vd1 of the DC power supply voltage detector 8-1 and the rated voltage Vdr (S25). Here, if Vd1 ≦ Vdr, it is determined that the regenerative energy is consumed by charging the power running machine and the storage battery 32.

  If Vd1> Vdr, the energy utilization unit 54Bc proceeds to step S8, and sends the operation command for starting the regenerative switching operation to the PWM converter 21-1 as described above, and uses the regenerative energy as the customer. The reverse conversion function for regenerating to the power source side is utilized (S8).

  Other processes are the same as those in the first embodiment, and thus are omitted.

(2) Next, an example of the on / off operation of the DC link contact and the like will be described by dividing into the power running and regenerative operation states of the plurality of units.

(B) When powering and regenerators are mixed (Units 1: 4: Regeneration, Units 2: 3, Powering)
DC link contacts 6-1 and 6-4 of all regenerative machines are turned on. When the first unit is a regenerative unit, first, after the regenerative switching of the PWM converter 1-1 of the first unit is stopped and forward conversion is performed (S7), the DC link contact 6- 2 is turned on (S11), after a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy has been recovered by the powering machine that is the second machine (S13). This regenerative energy interchange is maintained.

  If Vd1> Vdr, the multiple unit control device 5 determines that the regenerative energy is still present, and turns on the DC link contact 6-3 of the power unit that is the third unit (S11). Then, if Vd1 ≦ Vdr after a predetermined time has elapsed, it is determined that all of the regenerative energy has been recovered by the second and third units, which are power running units (S13), and the regenerative energy interchange state is maintained.

  However, if Vd1> Vdr, the multiple machine control device 5 sends a charge command to the charge / discharge converter 31 and absorbs the regenerative energy by charging the storage battery 32. After a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy has been regenerated to the No. 2 and No. 3 power storage units and the storage battery 32 (S25). Maintain energy accommodation.

  However, if Vd1> Vdr, the multi-unit control device 5 determines that the regenerative energy still remains, starts regenerative switching of the PWM converter 21-1 of the first unit (S8), and uses the regenerative energy as the customer. Regeneration is performed on the power supply side (S8).

  The multiple unit control device 5 acquires the DC voltage Vd1 after a predetermined delay time, and if Vd1 ≦ Vdr, all of the regenerative energy can be regenerated to the second unit / third unit, the storage battery 32, and the customer power supply side. The regenerative energy is maintained in a flexible state. Here, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

(B) When powering and regenerators are mixed (Units 1-2: Powering, Units 3.4: Regeneration)
The DC link contacts 6-3 and 6-4 of all regenerative machines are turned on (S5). Since the DC voltage of the DC power lines 25-1a, b, 25-4a, b of the corresponding machine is the same, it is simply turned on and there is no problem.

  If the first unit is a power running unit, first, the regenerative switching of the PWM converter 1-1 of the first unit is stopped and the DC link contact 6-1 is turned on (S10). After a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy can be recovered by the power unit that is the first unit (S13), and the regenerative energy is maintained in a flexible state. To do.

  If Vd1> Vdr, the multiple machine control device 5 determines that the regenerative energy is still remaining, and turns on the DC link contact 6-2 of the powering machine that is the second machine (S11). Then, after a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy can be recovered by the first and second power generators (S13). Maintain the flexibility of

  However, if Vd1> Vdr, the multiple machine control device 5 sends a charge command to the charge / discharge converter 31 and absorbs the regenerative energy by charging the storage battery 32. After a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy has been regenerated to the No. 1 and No. 2 power storage units and the storage battery 32 (S25). Maintain energy accommodation.

  However, if Vd1> Vdr, the multi-unit control device 5 determines that the regenerative energy still remains, starts regenerative switching of the PWM converter 21-1 of the first unit (S8), and uses the regenerative energy as the customer. Regeneration is performed on the power supply side (S8).

  The multiple unit control device 5 acquires the DC voltage Vd1 after a predetermined delay time, and if Vd1 ≦ Vdr, all of the regenerative energy can be regenerated to the first and second units, the storage battery 32, and the customer power supply side. The regenerative energy is maintained in a flexible state. Here, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

(C) When all units are regenerating (Units 1-4: Regeneration)
All the DC link contacts 6-1 to 6-4 are turned on (S5). Since the DC voltage of the DC power supply lines 25-1a, b, 25-4a, b of each unit is the same, it is simply turned on and there is no problem.

  The multiple machine control device 5 sends a charge command to the charge / discharge converter 31 and absorbs the regenerative energy by charging the storage battery 32. After a predetermined time has elapsed, the DC voltage Vd1 is acquired, and if Vd1 ≦ Vdr, it is determined that all of the regenerative energy has been regenerated to the storage battery 32 (S25), and the regenerative energy interchange state is maintained.

  However, if Vd1> Vdr, the multi-unit control device 5 determines that the regenerative energy still remains, starts regenerative switching of the PWM converter 21-1 of the first unit (S8), and uses the regenerative energy as the customer. Regeneration is performed on the power supply side (S8).

  The multiple unit control device 5 acquires the DC voltage Vd1 after a predetermined delay time, and if Vd1 ≦ Vdr, it determines that all of the regenerative energy has been regenerated to the customer power source side, and this regenerative energy is accommodated. Maintain state. Here, if Vd1> Vdr, it is determined that the regenerative energy is still surplus, and the surplus energy absorption circuits 24-1,... Are sequentially connected to consume surplus energy.

  Therefore, in the embodiment as described above, in addition to the effects obtained in the first embodiment, when the regenerative energy is surplus, the charge / discharge converter 31 is charged prior to the start of the regenerative switching of the charge / discharge converter 31. Since the control is performed and the regenerative energy is charged and absorbed by the storage battery 32, an appropriate power running machine can be selected at the time of all units power running, and the energy stored in the storage battery 32 can be effectively utilized for the power running machine.

  That is, in this embodiment, the DC link contact of the regenerator is turned on, the DC voltage Vd1 of the DC power supply line is compared with the rated voltage Vdr, and when the relationship of Vd1> Vdr is satisfied, Since the storage battery 32 and the charge / discharge converter 31 are sequentially turned on, regenerative energy can be used effectively.

  When the voltage difference between the DC voltage of the DC power supply line, that is, the voltage between the common DC buses 7P-7N and the storage voltage of the storage battery 32 is large, it is necessary to protect the charge / discharge converter 31 by the inrush current due to the voltage mismatch. . Therefore, when the difference between the DC voltage detected by the voltage detector 8-0 and the voltage of the storage battery 32 is within a predetermined range, a charge / discharge command is sent to the charge / discharge converter 31.

(Third embodiment)
FIG. 7 is a schematic configuration diagram of an elevator system according to the third embodiment. The third embodiment is an embodiment in which the stored energy of the storage battery 32 is used as a backup power source for the multiple machine control device 5 and each of the machine control devices 3-1 to 3-4 at the time of a power failure of the customer power supply.

  In the third embodiment, a power failure changeover switch 35 and a power failure power supply line 36 are newly provided in the configuration of the second embodiment (see FIG. 5). Furthermore, as the multiple unit control processing unit 54 of the multiple unit control device 5, in order to effectively use the stored energy of the storage battery 32, an operation order control means 54be for controlling the operation of each unit according to a predetermined operation sequence is provided. Yes.

  The power failure changeover switch 35 is provided between the positive and negative power supply lines of the storage battery 32 (see FIG. 5) and the power supply line 36 at the time of power failure, and receives a power failure changeover signal from the multiple unit control device 5 when a power failure of the customer power supply is detected. Turn on.

  The power supply line 36 at the time of a power failure supplies a storage battery power to the multiple machine control device 5 and each of the machine control devices 3-1 to 3-4 when the power failure changeover switch 35 is turned on.

  As the multiple unit control processing unit 54, each unit operation sequence (priority order) data at the time of power failure is stored in the data setting unit 53a of the auxiliary storage device 53 in advance. Here, the operation order of each unit is determined in consideration of the user's demand and usability during a power failure.

  As the operation sequence control means 54be of the multiple unit control processing unit 54, a discharge command is sent to the charge / discharge converter 31 at the time of a power failure, the DC link contact, for example, 6-1 is turned on according to the operation sequence data, and the power failure changeover switch 35 is turned on. When the battery is turned on, the storage battery power is supplied to the target number machine control device 3-1 through the power supply line 36 at the time of power failure, for example, the first machine is operated.

  When the first machine arrives at the reference floor or the nearest floor and drops the passenger, the DC link contact, for example, 6-2 is turned on according to the operation sequence data, and for example, the second machine is moved to the reference floor or the nearest floor.

  As described above, when the main circuit DC power obtained from the storage battery power supply is sequentially supplied to the operation target unit through the DC link contact in accordance with the operation sequence, and the passengers are lowered to the nearest floor or the like, the next unit is operated. In this way, at the time of a power failure, only the stored energy of the storage battery 32 is used to sequentially operate each unit according to the operation order.

  In addition, when the storage capacity of the storage battery 32 is sufficiently large, a plurality of machines can be operated simultaneously.

  Therefore, according to this embodiment, in addition to the various effects obtained from the first and second embodiments, the power storage of the storage battery 32 is performed in accordance with a predetermined operation order (priority order) when a customer power supply is interrupted. Since the operation is continued by supplying energy, it is possible to operate a plurality of elevator cars with failure redundancy.

  The first to third embodiments are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  1-1 to 1-4 ... main circuit switch, 2-1 to 2-4 ... main circuit power source, 3-1 to 3-4 ... machine controller, 4-1 to 4-4 ... AC motor for hoisting machine 5 ... Plural machine control device, 6-1 to 6-4 ... DC link contact, 7P, 7N ... Common DC bus, 8-0 to 8-4 ... Voltage detector, 21-1 ... PWM converter, 21-2 21-4 ... Diode converter, 22-1 to 22-4 ... Smoothing capacitor, 23-1 to 23-4 ... Inverter, 24-1 (Q1) to 24-4 (Q4) ... Surplus energy absorption circuit, 25- 1a, b to 25-4a, b ... Unit DC power supply line, 31 ... Charge / discharge converter, 32 ... Storage battery, 35 ... Power failure switch, 36 ... Power supply line during power failure, 53 ... Auxiliary storage device, 53a ... Data setting unit 53b ... Delay timer 53c ... Unit management table 54 Multiple unit control processing unit, 54A ... Power running / regeneration determination unit, 54B ... Multiple unit control processing unit, 54Ba ... Contact operation unit, 54Bb ... Converter operation control unit, 54Bc ... Energy utilization unit, 54Bd ... Charge / discharge control unit, 54Be ... Operation sequence control means.

In order to solve the above-described problems, an elevator system according to an embodiment has at least a forward / reverse conversion function for receiving each unit control device that outputs a switching control signal, and a customer AC power source that receives the switching control signal of the unit control device. It is using one unit corresponding plurality unit corresponding diodes converter not subjected to PWM converter and the switching control signal having converted into DC power, and these converted DC power, receiving a switching control signal of the unit control device Commonly connected via a DC link switch between the main circuit power supply corresponding to the unit that converts the desired AC power using an inverter compatible with the unit and drives the motor corresponding to each unit, and the DC power supply line of each main circuit power supply corresponding to each unit A DC bus is connected, and the DC link switch is selectively turned on in response to an external instruction. Unit and power connection means, based on said magnitude of each unit corresponding main circuit power of the DC power source voltage, to determine the power running, regeneration of each unit, depending on the power running and regeneration of the state of each unit of this has been determined, optionally the DC link switch turned on, and a plurality of unit controller for flexible control regenerative energy,
The multiple unit control device includes a power running / regeneration determining means for determining power running / regeneration of each elevator from the magnitude relationship between the DC power supply voltage of the main circuit power supply corresponding to each unit and a predetermined DC voltage, and this power running / regeneration determination. The DC link switch is selectively turned on according to the power running / regeneration state of the elevator determined by the means, and at least when all the elevators are regenerated, a reverse conversion operation command is issued to the PWM converter to generate the regeneration. When energy is regenerated to the customer's AC power source and power running and regenerative states are mixed between each elevator, mutual control of power running energy and regenerative energy generated in the main circuit power supply corresponding to each unit is performed. It is the structure which provided the multiple machine control processing means.

Claims (7)

Each unit controller that outputs a switching control signal;
The customer AC power supply is converted into DC power using at least one unit-compatible PWM converter that receives the switching control signal of the unit control device and a plurality of unit-compatible diode converters that do not receive the switching control signal, and these The converted direct current power is converted into desired alternating current power using an inverter corresponding to the number machine that receives the switching control signal of the number machine control device, and the main circuit power supply corresponding to the number machine that drives the corresponding number machine electric motor,
A common DC bus is connected via a DC link switch between the DC power lines of the main circuit power supply corresponding to each unit, and a unit power supply connection means for selectively turning on the DC link switch in response to an instruction from the outside,
Based on the magnitude relationship of the DC power supply voltage of each main circuit power supply, the power running / regeneration of each unit is determined, and the DC link switch is selectively turned on according to the determined power running / regeneration state of each unit. An elevator system comprising a plurality of unit control devices that control interchange of powering energy and regenerative energy between units. The elevator system according to claim 1,
The multiple unit control device is determined by a power running / regeneration determining unit that determines power running / regeneration of each elevator from the magnitude relationship between the DC power supply voltage of each unit and a predetermined DC voltage, and the power running / regeneration determining unit. Multiple unit control processing means for selectively turning on the DC link switch according to the power running / regeneration state of the elevator and controlling interchange of power running energy and regenerative energy generated in the main circuit power supply corresponding to each unit An elevator system characterized by comprising: In the elevator system according to claim 1 or 2,
If the at least one unit is regenerated based on the determination result of the power running / regeneration determination unit, the plurality of units control processing unit turns on the DC link contact corresponding to the regenerative unit, and uses the common regenerative energy. Contact operation means for outputting to the DC bus, converter operation control means for performing forward conversion operation of the PWM converter after the DC link contact is turned on by the contact operation means, and a predetermined order during the forward conversion operation of the PWM converter And an energy utilization means for sequentially turning on the DC link contacts corresponding to the power running machine and utilizing the regenerative energy for operation of the power running machine. The elevator system according to claim 3.
The converter operation control means regenerates energy even if all units are regenerated from the determination result of the power running / regeneration determination unit or the DC link switch corresponding to all of the power running units is turned on by the energy utilization unit. When the power cannot be consumed, an inverse conversion operation of the PWM converter is performed, and the regenerative energy is regenerated to the customer AC power supply. The elevator system according to any one of claims 1 to 4,
A charge / discharge converter connected between the common DC buses and receiving charge command or discharge command from outside to control charge / discharge,
A storage battery that charges and discharges electric energy according to the charge and discharge control of the charge and discharge converter;
Provided in the multiple unit control processing means, and when all the units are determined to be regenerated from the determination result of the power running / regeneration determination unit, prior to the reverse conversion operation of the PWM converter by the converter operation control unit, The DC link switch corresponding to the predetermined order of the power running machine, if the power running / regenerative judgment means determines that all units are powered from the power running / regenerative judgment means. An elevator system further comprising charge / discharge control means for selectively turning on the battery and sending out the charge command to use the stored energy of the storage battery through the common DC bus for the operation of the power running machine. In the elevator system according to claim 4 or 5,
Even if regenerative energy is regenerated to the customer AC power supply by performing the reverse conversion operation by the PWM converter, when the regenerative energy still remains, an excess energy absorption circuit is provided between the DC power supply lines of the main circuit power supplies. Elevator system characterized by sequentially inserting and consuming surplus regenerative energy. The elevator system according to claim 5 or 6,
A power failure changeover switch connected to the positive and negative power supply lines of the storage battery;
A power supply line at the time of a power failure connected to the multiple unit control device and each unit control device from the output side of the power failure changeover switch,
Provided in the multiple unit control processing means, predetermined unit operation sequence data is stored, and a power failure changeover switch is turned on at the time of a power failure of the customer AC power supply, and a discharge command is output to the charge / discharge converter, and The elevator system further comprises operation sequence control means for turning on the DC link switch of the corresponding vehicle according to the operation sequence data and controlling the operation of the corresponding vehicle.

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