JP4619039B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device that stores regenerative energy generated during regenerative operation of an elevator in a power storage device, discharges it during powering operation, reuses it, and uses it as a backup power source during a power failure.

  As shown in FIG. 7, the elevator control device includes a control drive system that supplies predetermined drive power, and a rope type elevator that raises and lowers the car based on the drive power supplied from the control drive system. .

  The control drive system includes a commercial AC power source 1, a rectifier circuit 2, a smoothing capacitor 3, an inverter 4 that converts DC power smoothed by the smoothing capacitor 3 into AC power having a required frequency and supplies the AC power to an electric motor 11, and the inverter A drive control unit 5 for controlling 4 and the like is provided.

  On the other hand, the rope type elevator includes an electric motor 11, a rope 13 wound around a main sheave 12 connected to a rotation shaft of the electric motor 11, a passenger car 14 and a counterweight 15 suspended from the ends of the rope 13. Is provided. Reference numeral 16 denotes a deflecting sheave.

  By the way, in such an elevator control device, when the car 14 rises in a heavy load state or descends in a light load state, the commercial AC power source 1 → the rectifier circuit 2 → the smoothing capacitor 3 → the inverter 4 When a power running operation is performed to supply the generated electric power to the electric motor 11 and the car 14 descends in a heavy load state or rises in a light load state, the electric motor 11 → the inverter 4 → the smoothing capacitor 3 Regenerative operation for generating electric power in order is performed. During this regenerative operation, the power returning from the electric motor 11 to the inverter 4 is blocked by the rectifier circuit 2, so that the voltage on the inverter input end side increases and damages the elements constituting the rectifier circuit 2 and the inverter 4. There is.

  Therefore, conventionally, since it is necessary to consume power corresponding to the voltage increase due to the power returning from the motor 11 to the inverter 4 during the regenerative operation, a serial connection between the self-extinguishing element 6 and the resistor 7 is provided between the DC output lines of the rectifier circuit 2. When the resistance chopper 8 which is a circuit is connected and the DC voltage between the DC output lines exceeds the set voltage during the regenerative operation, the drive control unit 5 sends a control signal for turning on the self-extinguishing element 6, and the voltage increase The power consumption corresponding to 1 is consumed by the resistor 7 (Patent Document 1).

  However, in such an elevator control apparatus, since the electric power generated from the electric motor 11 during the regenerative operation is consumed as heat by the resistor 7, there is a problem that the electric power obtained by the regenerative operation cannot be used effectively.

Therefore, in the technique of Patent Document 1, in order to solve the above problems, energy that is connected between the input side DC voltage lines of the inverter 4 as shown in FIG. An elevator control device having a storage device 21 and a charge / discharge control unit 22 that determines regenerative operation and power running operation from the voltage across the smoothing capacitor 3 and performs charge / discharge control on the energy storage device 21 has been developed. . The energy storage device 21 is turned on in response to a charge control signal from the charge / discharge control unit 22 during the regenerative operation, and the energy energy during the regenerative operation is transferred to the energy storage capacitor or battery via the absorption reactor 23. The absorption switching element 25 that stores power in the power storage device 24 and the on-state operation after being turned on by a control signal from the charge / discharge control unit 22, and the energy stored in the power storage device 24 is transferred to the DC voltage via the discharge reactor 26 A discharge switching element 27 that discharges between the lines is provided. Reference numeral 28 denotes a voltage detector.
Japanese Patent Laid-Open No. 10-236743

  Therefore, in the elevator control device as described above, the regenerative operation and the power running operation are determined, and the regenerative power energy generated from the electric motor 11 during the regenerative operation is stored in the power storage device 24, while the power storage device 24 is used during the next power running operation. The regenerative power stored in the battery is discharged for powering operation and used as a backup power source in the event of a power failure.

  However, when there is no change in the voltage between the DC output lines of the rectifier circuit 2 while the car 14 starts driving, the charge / discharge control unit 22 performs charge control or discharge control from the voltage detected by the voltage detection unit 28. It becomes difficult to judge whether. For example, if a power failure occurs while discharging control is being performed, there is a problem that the role of the backup power source cannot be achieved due to a shortage of energy stored in the power storage device 24. In any case, in the event of a power failure of the AC power supply 1 following the discharge control by the charge / discharge control unit 22, a shortage of the stored energy of the power storage device 24 becomes a problem.

  The present invention has been made in view of the above circumstances, and not only extends the life of the power storage device while considering the status of the individual batteries constituting the power storage device, but also elevator control that eliminates the energy shortage of the power storage device used during a power outage An object is to provide an apparatus.

In order to solve the above-described problems, the present invention provides a rectifier circuit that converts AC power from an AC power source into DC power, and converts the DC power converted by the rectifier circuit into AC power having a variable voltage and variable frequency for output. Inverter, an electric motor driven by the AC power output from the inverter and driving the car, a speed command according to a predetermined driving pattern, a control torque obtained from the deviation of the motor speed, and the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage and variable frequency based on a total torque with a torque compensation value added under a load,
A plurality of command value selection signals are set by powering / regenerative operation in the next travel from the relationship between the travel direction of the travel pattern and the load signal of the car, and the travel direction obtained from the travel pattern and the car A next running operation determining means for selecting and outputting one command value selection signal for power running / regenerative operation during the next running based on a loaded load signal or a torque compensation value added based on the load signal;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
When the current power storage energy of the power storage device exceeds a reference energy, a specified voltage command value based on a command value selection signal from the next traveling operation determination means is output, and the current power storage energy of the power storage device is a reference If becomes lower than the energy, and the voltage command output means for outputting a lower specified voltage command value,
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. It is the structure which provided the charging / discharging electric current control means to control.

  The present invention is configured as described above, so that when a power failure occurs during the next driving operation while performing charge / discharge control while recognizing whether it is a power running operation or a regenerative operation during the next driving based on the traveling direction and load conditions of the elevator. In consideration, since the voltage command value from the voltage command output means is applied in a direction to limit, the life of the power storage device can be extended, and it can be reliably used as a backup power source in the event of a power failure.

The present invention also provides a rectifier circuit that converts AC power from an AC power source into DC power, an inverter that converts the DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency, and the inverter An electric motor driven by the AC power output from the vehicle, a speed command according to a predetermined travel pattern, a control torque obtained from a deviation of the speed of the motor, and a load of the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage variable frequency based on a total torque with a torque compensation value to be added,
A plurality of command value selection signals are set by powering / regenerative operation in the next travel from the relationship between the travel direction of the travel pattern and the load signal of the car, and the travel direction obtained from the travel pattern and the car A next running operation determining means for selecting and outputting one command value selection signal for power running / regenerative operation during the next running based on a loaded load signal or a torque compensation value added based on the load signal;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
Monitoring results as to whether or not the deviation of the storage voltage between the batteries constituting the power storage device is large and voltage change monitoring means for outputting the storage energy of the power storage device;
The monitoring result that the deviation of the storage voltage decrease between the batteries is small from the voltage change monitoring means and the current storage energy of the power storage device exceeds the reference energy, the command from the next running operation determination means outputs a specified voltage command value based on the value selection signal, the reduced current If stored energy is lower than the reference energy monitoring results and the power storage device is large bias condition, the lower specified voltage command value Voltage command output means for outputting
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. It is the structure which provided the charging / discharging electric current control means to control.

  In the present invention, the voltage command value is output from the voltage command device 56a while recognizing whether it is a power running operation or a regenerative operation during the next traveling based on the traveling direction and load conditions of the elevator. Since charging / discharging control is performed, charging / discharging control of the power storage device 54 can be performed in an optimum state, and the voltage command value from the voltage command output means is limited while considering the power failure of the next driving operation and the state of each battery. Therefore, the life of the power storage device can be extended, and it can be reliably used as a backup power source in the event of a power failure.

  If a filter is provided in the output line of the load signal of the car or the torque compensation value corresponding to the load signal and a signal that suppresses a sudden change in the load signal or the torque compensation value is output, the next driving operation The determination means can output an appropriate command value selection signal while reducing malfunction caused by the load signal.

  Even when a weighted average value calculation means is provided in the load line of the car or the output line of the torque compensation value corresponding to the load signal, or when a load data table defining a plurality of load detection ranges is provided, the load signal It is possible to output an appropriate command value selection signal while reducing malfunction caused by.

  (2) Further, according to the present invention, a command value selection signal corresponding to a plurality of energy consumption ranges is set in advance as a next traveling operation determination unit based on a relationship between a traveling direction of a traveling pattern and the speed of the electric motor, and the traveling One command value selection signal can be extracted depending on which energy consumption range the energy consumption obtained from the traveling direction obtained from the pattern and the actual speed of the electric motor belongs.

  Further, the consumed energy by the next traveling operation determining means may be calculated from the torque and the actual speed of the electric motor and take out any one command value selection signal.

  The present invention can provide an elevator control device that eliminates an energy shortage of a power storage device used during a power failure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing an embodiment of an elevator control apparatus according to the present invention. In the figure, the same or equivalent parts as in FIG.
This elevator control device supplies a required AC power to drive the motor 11, a rope-type elevator that receives the power from the drive control system and causes the motor 11 to lift and lower the car 14, An elevator operation control system for driving the car 14 based on a speed command corresponding to the pattern, a next driving operation determination system for determining whether the car is in a regenerative operation or a power running operation during the next driving, and charging / discharging for performing charge / discharge control And a current control system.

  The drive control system includes a rectifier circuit 2 that converts three-phase AC power output from a commercial AC power supply 1 into DC power, a smoothing capacitor 3 that smoothes DC power converted by the rectifier circuit 2, and the smoothing An inverter 4 is provided that converts the DC power smoothed by the capacitor 3 into three-phase AC power having a required frequency and supplies it to the motor 11.

  The rope type elevator has a configuration generally used conventionally. For example, an electric motor 11, a rope 13 wound around a main sheave 12 connected to a rotation shaft of the electric motor 11, an end portion of the rope 13 A suspension sheave 16 and a counterweight 15 suspended from the main sheave 12 to the counterweight 15 in order to avoid interference between the carriage 14 and the counterweight 15, and a sled sheave 16 that shifts the suspension position of the rope 13 that leads from the main sheave 12 to the counterweight 15. Is provided.

  As the elevator operation control system, a speed detection unit 31 that detects the rotational speed of the electric motor 11 and a speed command unit that outputs a speed command corresponding to the travel pattern when an elevator travel pattern is set in advance and an activation command is received. 32, a speed control unit 33 that compares the speed command from the speed command unit 32 and the detected speed of the speed detection unit 31 and calculates and outputs a torque command value such that the deviation becomes zero, for example, a car 14 is provided with a load detection switch 34 composed of a plurality of switch elements that are selectively turned on according to the load weight of 14.

  The load detection switch 34 is, for example, a switch element 34 (1) that operates when the loading weight of the car 14 is lighter than the required loading weight (balanced weight), and an intermediate weight within a predetermined range including the required loading weight. The switch element 34 (2) that operates sometimes and the switch element 34 (3) that operates when the weight is heavier than the intermediate weight, and a load signal due to the ON operation of these switches is sent to the load signal calculation unit 35. The load signal calculation unit 35 converts the load signal detected by the load detection switches 34 (1) to 34 (3) into a torque compensation value and outputs the torque compensation value. For example, the load detection switches 34 (1) and 34 (2) The load signal detected in 34 (3) has a function of converting to a torque compensation value (rotational power) of -10, 0, +10 and outputting it.

  The elevator operation control system includes a torque command determination unit 36 that calculates and outputs the total torque command value of the torque command from the speed control unit 33 and the torque compensation value from the load signal calculation unit 35, and the output of the inverter 4. Of the inverter 4 based on the inverter current detection unit 37 for detecting the inverter current, the real-time command value of the motor current obtained based on the total torque command value, and the inverter detection current of the current detection unit 37. An inverter current control unit 38 and the like for controlling the phase power conversion component are provided.

  The next traveling operation determination system has a function of determining whether the driving is a regenerative operation or a power running operation during the next traveling, and is provided with a driving determination table 41 and a next traveling operation determination unit 42. As shown in FIG. 2, the operation determination table 41 defines power running operation or regenerative operation from the loaded load and traveling direction of the car 14. For example, the driving car has a light loaded load and an upward traveling direction. In the case of, regenerative operation, light loading load, and in the descending traveling direction are defined as power running operation.

  Since the next traveling operation determination unit 42 grasps the traveling direction from the traveling pattern determined in advance by the speed command unit 32, the next traveling direction is fetched from the speed command unit 32 and the torque compensation value is obtained from the load signal calculation unit 35. It has a function of referring to the table 41 for taking in and driving and determining the driving at the next driving. The operation determination table 41 is set with a selection level that determines which level of voltage command is output from the voltage command device 56a described later.

  As the charge / discharge current control system, a plurality of charge / discharge control elements 51a, 51b such as self-extinguishing elements connected between the DC output lines of the rectifier circuit 2 and a common connection of these charge / discharge control elements 51a, 51b are used. A charge / discharge circuit 53 comprising a DC reactor 52 having a function of smoothing DC power, and connected to the charge / discharge circuit 53, storing regenerative energy during the regenerative operation of the electric motor 11, , 54n that discharges the energy stored during powering operation of the motor 11, and the bias that monitors the bias of the decrease in the stored voltage between the batteries 54a,. Monitoring means 55, current command output means 56 for outputting a current command that increases or decreases based on the monitoring result of the bias monitoring means 55, and a plurality of charge / discharge control elements 51a, It is constituted by a 1b charge and discharge current control unit 57 for charge and discharge control.

  The bias monitoring means 55 is a voltage detector 55a1,..., 55an that detects the accumulated voltage of each battery 54a,. A bias tolerance is set, and whether or not the deviation of the stored voltage of each battery 54-1,..., 54-n detected by the voltage detectors 55a1,. That is, a voltage change monitoring unit 55b for calculating whether or not there is a large deviation in the voltage decrease between the batteries and the current storage energy of the power storage device 54 is provided, and the monitoring result and the current storage energy are output as a current command. Send to means 56.

  This current command output means 56 is set with, for example, high, middle, and low specified voltage command values, the monitoring result as to whether or not the bias is large, the current stored energy of the power storage device 54 and the next traveling operation determination unit 42 A voltage command device 56a that outputs any specified voltage command value based on the relationship with the command value selection signal, a voltage detector 56b that detects a DC voltage on the smoothing capacitor 3, and the voltage command device 56a and the voltage detector 56b Current command value output element 56c for calculating and outputting a current command corresponding to the voltage difference (corresponding to the voltage fluctuation value), current detection unit 56d for detecting the storage current of power storage device 54, and current command value output element 56c. A subtraction of the storage current of the power storage device 54 detected by the current detection unit 56d from the output current command and output as a current command based on the voltage fluctuation value of the DC voltage described above. It is constituted by the element 56e and the like.

  The charging / discharging current control unit 57 determines the regenerative operation and the power running operation from the DC voltage output from the smoothing capacitor 3, and based on the current command from the computing element 56e considering the next traveling operation, The charge / discharge current is determined, the regenerative power energy is stored in the power storage device 54, and the energy stored in the power storage device 54 is released to the smoothing capacitor 3 side.

  Next, operation | movement of the above elevator control apparatuses is demonstrated.

  In the elevator operation control system described above, the torque obtained from the load of the car 14 and the torque such that the deviation between the speed command corresponding to the travel pattern output from the speed command unit 32 and the detected speed of the motor 11 becomes zero. A total torque command value composed of the compensation value is sent to the inverter current control unit 38, and here, based on the real-time command value of the motor current obtained based on the total torque command value and the inverter detection current of the current detection unit 37. The three-phase power conversion component of the inverter 4 is controlled.

  At this time, the next traveling operation determination unit 42 sets a balance weight (equal weight) between the car 14 and the counterweight 15, takes in the traveling direction at the next traveling from the traveling pattern of the speed command unit 32, and loads The load of the car 14 is taken in from the signal calculation unit 35, and a heavy load or a light load is determined from a comparison with the uniform load. Then, the next traveling operation determination unit 42 refers to the operation determination table 41 from the loaded load condition of the car 14 and the traveling direction at the next traveling, determines whether the operation is regenerative operation or power running operation, and determines a predetermined command value. The selection signal is extracted and sent to the voltage command device 56a. That is, the next traveling operation determination unit 42 is a signal for selecting the higher specified voltage command value, for example, if the car 14 is a heavy load and the traveling direction is a downward direction, the next traveling operation is a regenerative operation. Is output. Further, for example, if the car 14 is a heavy load and the traveling direction is an upward direction, the next traveling operation is a power running operation, so there is a possibility that the stored energy of the power storage device 54 may rapidly decrease. In order to avoid this, for example, a signal for selecting a lower specified voltage command value is output and sent to the voltage command device 56a.

  In principle, when the voltage command device 56a receives a command value selection signal from the next traveling operation determination unit 42, the voltage command device 56a outputs a specified voltage command value corresponding to the command value selection signal. Output, but give priority to the command value selection signal while ascertaining the status of each battery of the power storage device 54 and the stored energy of the power storage device 54, or lower by one or more steps from the specified voltage command value corresponding to the command value selection signal The specified voltage command value is output.

  That is, the voltage command device 56a is set with, for example, high, medium, and low specified voltage command values and reference energy that can be sufficiently backed up even during a power failure, and the batteries 54a,. In response to the monitoring result indicating that the degree of decrease in the stored voltage is small and the current stored energy, the command for the next traveling operation is issued from the next traveling operation determination unit 42 only when the current stored energy exceeds the reference energy. When the specified voltage command value corresponding to the value selection signal is output, and when the current stored energy exceeds the reference energy when receiving the monitoring result indicating that the bias of the stored voltage decrease is large and the current stored energy For example, in order to operate in a direction to suppress the current, for example, a command value signal for the next traveling operation from the next traveling operation determination unit 42 And it outputs a prescribed voltage command value of one stage or multiple stages lower than the prescribed voltage command value according to Patent. When the current stored energy received from the voltage change monitoring unit 55b is lower than the reference energy, the lowest specified voltage command value is output.

  The current command output means 56 determines the regenerative operation and the power running operation from the DC voltage output from the smoothing capacitor 3 and takes into consideration the stored energy of the power storage device 54 during the next traveling operation and power failure, and from the voltage command device 56a. The charge / discharge current of the charge / discharge circuit 53 is determined based on the current command value that depends on the voltage command value, the regenerative power energy is stored in the power storage device 54, and the energy stored in the power storage device 54 is stored on the smoothing capacitor 3 side. To release.

  Therefore, according to the embodiment as described above, the voltage command value is output from the voltage command device 56a while recognizing whether it is a power running operation or a regenerative operation during the next traveling based on the traveling direction and load conditions of the elevator. Since the discharge control is performed, the power storage device 54 can be charged / discharged in an optimum state, and the voltage command value from the voltage command device 56a is limited while considering the power failure during the next driving operation and the state of each battery. Since it acts in the direction, the life of the power storage device 54 can be extended, and it can be reliably used as a backup power source in the event of a power failure.

  FIG. 3 is a block diagram showing another embodiment of the elevator control apparatus according to the present invention. In the figure, the same or equivalent parts as in FIG. 1 are denoted by the same reference numerals, and the details will be given in the explanation of FIG.

  In this embodiment, when detecting the loading load of the car 14 detected by one load detection switch 34, there is a possibility that the load detection signal may vary greatly. Is connected to the filter circuit 43 to suppress the fluctuation of the load that changes suddenly, and is sent to the next traveling operation determination unit 42. The load signal calculation unit 35 determines a torque compensation value corresponding to the load signal in advance, and outputs a torque compensation value to be compensated according to the load signal detected by the load detection switch 34.

  Since other operations are the same as those in FIG. 1, the description is omitted here and will be omitted here.

  Therefore, according to such an embodiment, it is possible to avoid malfunction due to wobbling of the load detection signal, and to stably take in the loaded load of the car and to control the voltage command for charge / discharge control in the next driving operation. The value can be selected and output, and the power storage device 54 can be charged / discharged in the optimum state as in FIG. 1, and from the voltage command device 56a in consideration of the power failure during the next driving operation and the state of each battery. Therefore, it is possible to extend the life of the power storage device 54 and reliably use it as a backup power source in the event of a power failure.

  The filter circuit 43 may have a configuration provided on the output side of the load signal calculation unit 35.

  FIG. 4 is a block diagram showing still another embodiment of the elevator control apparatus according to the present invention. In the figure, the same or equivalent parts as in FIG. 1 are denoted by the same reference numerals, and the details will be given in the explanation of FIG.

  In this embodiment, when detecting the loading load of the car 14 detected by one load detection switch 34, there is a possibility that the load detection signal may vary greatly. Alternatively, a weighted average value calculation unit 44 is provided on the output side of the load signal calculation unit 35, and a load detection signal detected every moment or a torque compensation value corresponding to the load detection signal is integrated, and the average value is used as a load average value signal. Then, it is sent to the next traveling operation determination unit 42.

Since other operations are the same as those in FIG. 1, they will be omitted from the description of FIG.
Therefore, according to such an embodiment, by using the weighted average of the load detection signals, malfunctions due to the load signals can be avoided, and the same effects as in FIG. 1 can be obtained.

  FIG. 5 is a block diagram showing still another embodiment of the elevator control apparatus according to the present invention. In the figure, the same or equivalent parts as in FIG. 1 are denoted by the same reference numerals, and the details will be given in the description of FIG.

In this embodiment, when detecting the loaded load of the car 14 detected by the load detection switch 34, there is a possibility that the load detection signal may vary greatly. Therefore, the output side of the load detection switch 34 or the load signal A load data table 45 is provided on the output side of the calculation unit 35. Load detection values having a plurality of load detection ranges are set in the load data table 45, and the output of the load detection switch 34 or the load signal calculation unit 35 is set to any value. The load detection value is determined depending on whether the load detection range is entered, and is sent to the next traveling operation determination unit 42.

  Therefore, according to such an embodiment, the next traveling operation determination unit 42 uses the load detection value having a unity regardless of the fluctuation of the load detection signal of the load detection switch 34 during the next traveling operation. The command value selection signal can be determined, the malfunction due to the load signal can be avoided, and the same operational effects as in FIG. 1 can be obtained.

  FIG. 6 is a block diagram showing still another embodiment of the elevator control apparatus according to the present invention. In the figure, the same or equivalent parts as in FIG. 1 are denoted by the same reference numerals, and the details will be given in the description of FIG.

  In this embodiment, the driving determination table 41a describes the energy consumption range and the command value selection signal at that time corresponding to the actual speed range of the motor 11 and the traveling direction at the next traveling obtained from the traveling pattern. Further, the next traveling operation determination unit 42a refers to the operation determination table 41a based on the actual speed of the electric motor 11 by the speed detection unit 31 and the traveling direction obtained from the speed command unit 32, and outputs a command value selection signal as a voltage command. Send to device 56a. The reason why the actual speed range of the electric motor 11 is set in the operation determination table 41a is that the higher the actual speed, the larger the fluctuation of the DC voltage and the greater the consumed energy. Therefore, the actual speed of the electric motor 11 and the traveling of the car 14 are increased. It is possible to grasp which energy consumption range belongs to the direction, and when it belongs to a large energy consumption range, a command value selection signal for outputting a higher specified voltage command value is sent to the voltage command device 56a. That is, the next running operation determination unit 42a outputs a command value for outputting one of the specified voltage command values of high, middle, and low from the energy consumption range obtained from the actual speed of the motor 11 and the traveling direction of the car 14. The selection signal is determined and sent to the voltage command device 56a.

  In this voltage command device 56a, for example, high, medium and low specified voltage command values and reference energy capable of sufficiently backing up even in the event of a power failure are set, and the battery 54a,. The command value for the next driving operation is determined from the next driving operation determination unit 42 only when the current storage energy exceeds the reference energy when the monitoring result indicating that the bias of the decrease in the accumulated voltage is small and the current storage energy is received. Only when the specified voltage command value corresponding to the selection signal is output, and the monitoring result indicating that the bias of the decrease in the stored voltage is large and the current stored energy is received, the current stored energy exceeds the reference energy In order to operate in a direction to suppress the current, for example, the command value selection signal for the next traveling operation is sent from the next traveling operation determination unit 42 Flip was prescribed voltage command value to output a specified voltage command value of one stage or multiple stages lower than. When the current stored energy received from the voltage change monitoring unit 55b is lower than the reference energy, the lowest specified voltage command value is output.

  The current command output means 56 determines the regenerative operation and the power running operation from the DC voltage output from the smoothing capacitor 3 and takes into consideration the stored energy of the power storage device 54 during the next traveling operation and power failure, and from the voltage command device 56a. The charge / discharge current of the charge / discharge circuit 53 is determined based on the current command value that depends on the voltage command value, the regenerative power energy is stored in the power storage device 54, and the energy stored in the power storage device 54 is stored on the smoothing capacitor 3 side. To release.

  Therefore, according to the above embodiment, the consumption energy range is determined from the actual speed of the electric motor 11 and the traveling direction of the car, and the specified voltage command corresponding to the command value selection signal belonging to this consumption energy range is given. Since the charging / discharging control is performed by outputting, the charging / discharging control of the power storage device 54 can be performed in an optimum state, and the voltage command from the voltage commanding device 56a is taken into consideration at the time of power failure in the next driving operation and the state of each battery Since it acts in the direction of limiting the value, the life of the power storage device 54 can be extended, and it can be reliably used as a backup power source in the event of a power failure.

  As an example of calculating the energy consumption, for example, the output torque of the torque command determination unit 36 and the actual speed of the motor detected by the speed detection unit 31 are extracted, and the output torque and the actual speed are multiplied to calculate the power consumption. Since it can be obtained, the driving determination table 41a may be applied based on the obtained power consumption.

  Therefore, it goes without saying that this embodiment also has the same operational effects as the embodiment shown in FIG.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  In addition, the embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Further, each of the above embodiments includes various higher-level and lower-level inventions, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted because some constituent elements can be omitted from all the constituent elements described in the means for solving the problem, the omitted part is used when the extracted invention is implemented. Is appropriately supplemented by well-known conventional techniques.

The block diagram which shows one Embodiment of the elevator control apparatus which concerns on this invention. The table data figure explaining the example which determines a command value selection signal from a load condition and a running direction. The block diagram which shows other embodiment of the elevator control apparatus which concerns on this invention. The block diagram which shows other embodiment of the elevator control apparatus which concerns on this invention. The block diagram which shows other another embodiment of the elevator control apparatus which concerns on this invention. The block diagram which shows other another embodiment of the elevator control apparatus which concerns on this invention. The block diagram of the conventional elevator control apparatus. The block diagram of the conventional elevator control apparatus which performs charging / discharging operation | movement at the time of regeneration / power running operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Commercial AC power source, 2 ... Rectifier circuit, 3 ... Smoothing capacitor, 4 ... Inverter, 11 ... Electric motor, 12 ... Main sheave, 13 ... Rope, 14 ... Ride car, 15 ... Counterweight, 31 ... Speed detection part, 32 ... speed command part, 33 ... speed control part, 34 ... load detection switch, 35 ... load signal calculation part, 36 ... torque command determination part, 37 ... inverter current detection part, 38 ... inverter current control part, 41, 41a ... operation Table for determination, 42, 42a ... Next traveling operation determination unit, 43 ... Filter circuit, 44 ... Weighted average value calculation unit, Weighted data table, 51a, 51b ... Charge / discharge control element, 53 ... Charge / discharge circuit, 54 ... Power storage device 54a, ..., 54n ... battery, 55 ... bias monitoring means, 55a1, ..., 55an ... voltage detection part, 55b ... voltage change monitoring part, 56 ... current command output means, 56a Voltage command unit, 56b ... voltage detection unit, 56c ... current command value output element, 56d ... current detection unit, 56e ... computing elements, 57 ... discharge current control unit.

Claims (8)

A rectifier circuit that converts AC power from an AC power source into DC power, an inverter that converts DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency, and AC power output from the inverter A motor driven by a car to drive the car, a speed command according to a predetermined running pattern, a control torque obtained from the deviation of the motor speed, and a torque compensation value added based on the loading load of the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage variable frequency based on the total torque with
A plurality of command value selection signals are set by powering / regenerative operation in the next travel from the relationship between the travel direction of the travel pattern and the load signal of the car, and the travel direction obtained from the travel pattern and the car A next running operation determining means for selecting and outputting one command value selection signal for power running / regenerative operation during the next running based on a loaded load signal or a torque compensation value added based on the load signal;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
When the current power storage energy of the power storage device exceeds a reference energy, a specified voltage command value based on a command value selection signal from the next traveling operation determination means is output, and the current power storage energy of the power storage device is a reference If becomes lower than the energy, and the voltage command output means for outputting a lower specified voltage command value,
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. An elevator control device comprising charge / discharge current control means for controlling. A rectifier circuit that converts AC power from an AC power source into DC power, an inverter that converts DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency, and AC power output from the inverter A motor driven by a car to drive the car, a speed command according to a predetermined running pattern, a control torque obtained from the deviation of the motor speed, and a torque compensation value added based on the loading load of the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage variable frequency based on the total torque with
A plurality of command value selection signals are set by powering / regenerative operation in the next travel from the relationship between the travel direction of the travel pattern and the load signal of the car, and the travel direction obtained from the travel pattern and the car A next running operation determining means for selecting and outputting one command value selection signal for power running / regenerative operation during the next running based on a loaded load signal or a torque compensation value added based on the load signal;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
Monitoring results as to whether or not the deviation of the storage voltage between the batteries constituting the power storage device is large and voltage change monitoring means for outputting the storage energy of the power storage device;
The monitoring result that the deviation of the storage voltage decrease between the batteries is small from the voltage change monitoring means and the current storage energy of the power storage device exceeds the reference energy, the command from the next running operation determination means outputs a specified voltage command value based on the value selection signal, the reduced current If stored energy is lower than the reference energy monitoring results and the power storage device is large bias condition, the lower specified voltage command value Voltage command output means for outputting
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. An elevator control device comprising charge / discharge current control means for controlling. In the elevator control device according to claim 1 or 2,
An elevator control device characterized in that a filter is provided on an output line of a load signal of the passenger car or a torque compensation value corresponding to the load signal, and an abrupt change in the load signal or torque compensation value is suppressed and output. In the elevator control device according to claim 1 or 2,
A weighted average value calculating means is provided in an output line of a load signal of the car or a torque compensation value corresponding to the load signal, the load signal or the torque compensation value is added, and the average value is output. Elevator control device. In the elevator control device according to claim 1 or 2,
A load data table defining a plurality of load detection ranges is provided in an output line of the load signal of the car or the torque compensation value corresponding to the load signal, and the torque compensation value corresponding to the load signal or the load signal is provided. elevator controller, wherein you output one of the signals belonging to any of the load detection range. A rectifier circuit that converts AC power from an AC power source into DC power, an inverter that converts DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency, and AC power output from the inverter A motor driven by a car to drive the car, a speed command according to a predetermined running pattern, a control torque obtained from the deviation of the motor speed, and a torque compensation value added based on the loading load of the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage variable frequency based on the total torque with
Command value selection signals corresponding to a plurality of energy consumption ranges are set in advance from the relationship between the traveling direction of the traveling pattern and the speed of the electric motor, and the consumption obtained from the traveling direction obtained from the traveling pattern and the actual speed of the electric motor. A next traveling operation determining means for taking out one of the command value selection signals according to which energy consumption range the energy belongs to;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
When the current storage energy of the power storage device exceeds a reference energy, a specified voltage command value based on a command value selection signal from the next traveling operation determining means is output, and the current storage energy of the power storage device is a reference energy when it becomes lower Ku than the voltage command output means for outputting a subordinate specified voltage command value,
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. An elevator control device comprising charge / discharge current control means for controlling. A rectifier circuit that converts AC power from an AC power source into DC power, an inverter that converts DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency, and AC power output from the inverter A motor driven by a car to drive the car, a speed command according to a predetermined running pattern, a control torque obtained from the deviation of the motor speed, and a torque compensation value added based on the loading load of the car In an elevator control device provided with drive control means for controlling the inverter so as to output AC power of the variable voltage variable frequency based on the total torque with
Command value selection signals corresponding to a plurality of energy consumption ranges are set in advance from the relationship between the traveling direction of the traveling pattern and the speed of the electric motor, and the consumption obtained from the traveling direction obtained from the traveling pattern and the actual speed of the electric motor. A next traveling operation determining means for taking out one of the command value selection signals according to which energy consumption range the energy belongs to;
A power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the motor and release the stored energy to the inverter side during power running operation of the motor;
Monitoring results as to whether or not the deviation of the storage voltage between the batteries constituting the power storage device is large and voltage change monitoring means for outputting the storage energy of the power storage device;
The monitoring result that the deviation of the storage voltage decrease between the batteries is small from the voltage change monitoring means and the current storage energy of the power storage device exceeds the reference energy, the command from the next running operation determination means outputs a specified voltage command value based on the value selection signal, if the current stored energy of the monitoring results and the power storage device and the bias of the reduced degree is large becomes lower Ku than the reference energy, the specified voltage command subordinate Voltage command output means for outputting a value;
Based on the specified voltage command value from the voltage command output means and a current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the power storage device is charged and discharged during the regenerative operation and power running operation. An elevator control device comprising charge / discharge current control means for controlling. In the elevator control device according to claim 6 or 7,
The elevator control device according to claim 1, wherein the energy consumed by the next traveling operation determining means is calculated from the total torque and the actual speed of the electric motor.

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