JP2005324880A - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize energy saving irrespective of varying voltage of the commercial AC power supply. <P>SOLUTION: The elevator control device is equipped with a drive control part 5 to control an inverter 4 so as to emit an AC power in conformity to a speed command and drive a motor 11, an accumulating device 34 of a plurality of batteries to accumulate the regenerated power at the time of regenerative operation and discharge the accumulated power at the time of power running, a voltage variation monitoring part 35b to monitor whether the eccentricity in the voltage decrease of batteries from each other is greater than the eccentricity allowable value, a current command output means 36 to output a current command depending upon the voltage variation between rectifier circuit output lines when the eccentricity in the voltage decrease of batteries from each other remains small and issue a current command in the direction of suppressing the current while depending upon the voltage variation when the eccentricity is large, a current bias setting part 37 to add the prescribed current bias value to the current command when the eccentricity is small and add a current smaller than the prescribed current bias value when the eccentricity is large, and a current control part 38 to control the charging and discharging to/from the accumulating device at the time of regenerative and power running operation in conformity to the current command including the additional current bias value. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator control device that realizes energy saving despite a voltage fluctuation of a commercial AC power supply.

  In general, an elevator control device is composed of a control drive system that supplies a predetermined motor drive power as shown in FIG. 8, and a rope type elevator that raises and lowers a passenger car based on the drive power supplied from the control drive system. Has been.

  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 rotating 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 is lifted with a heavier load than the counterweight 15 or when the car 14 is lowered with a heavier load than the counterweight 15, the commercial AC power source 1 → rectifier circuit 2 → smooth A power running operation for supplying electric power generated in the order of the capacitor 3 to the inverter 4 to the electric motor 11 is performed, and conversely, when the car 14 descends with a heavier load than the counterweight 15 or when the load is lighter than the counterweight 15 When it rises in a state, a regenerative operation for generating electric power in the order of the electric motor 11 → the inverter 4 → the smoothing capacitor 3 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. . During the regenerative operation, the energy storage device 21 is turned on in response to the charge control signal from the charge / discharge control unit 22, and the energy energy during the regenerative operation is stored in the energy storage capacitor 24 via the absorption reactor 23. The power switching device 25 is turned on after being turned on by a control signal from the absorption switching element 25 and the charge / discharge control unit 22, and the power energy stored in the energy storage capacitor 24 is transferred between the DC voltage lines via the discharge reactor 26. A discharge switching element 27 for discharge is provided. Reference numeral 28 denotes a voltage detector.
Japanese Patent Laid-Open No. 10-236743

  Therefore, in the elevator control apparatus as described above, the regenerative operation and the power running operation are determined, the electric power generated from the electric motor 11 during the regenerative operation is accumulated in the energy storage capacitor 24, and the electric power energy accumulated during the power running operation is stored. Is used for powering operation, so that regenerative energy can be used effectively. A battery using a lead storage battery that can be charged and discharged in place of the storage capacitor 24 has been proposed.

  Conventionally, in the control device as described above, the DC voltage smoothed by the smoothing capacitor 3 is detected by the voltage detector 28, and the magnitude of the DC voltage detected by the voltage detector 28, that is, the rectifier circuit 2 is detected. When the voltage fluctuation of the DC voltage detected by the voltage detector 28 is large as well as determining whether the charge / discharge control unit 22 is in a regenerative operation or a power running operation according to whether or not it is larger than the rectified output voltage of When the switching elements 25 and 27 are turned on / off at a high speed to pass a large amount of current, and when the voltage fluctuation of the DC voltage detected by the voltage detector 28 is small, the switching elements 25 and 27 are moved at a low speed. On / off control is performed so that a small current flows.

  As a result, there is a problem that the energy saving current value from the energy storage device 21 side is significantly changed by the voltage fluctuation of the DC voltage on the smoothing capacitor 3 side.

  In addition, there are variations such as performance deterioration in a plurality of storage capacitors 24 and a plurality of lead storage batteries that function as a power storage device, and the charge / discharge current is uniformly distributed according to the voltage fluctuation of the DC voltage detected by the voltage detector 28. The change causes a problem that the deterioration of the plurality of storage capacitors 24 and the plurality of lead storage batteries is accelerated and the life is shortened.

  The present invention has been made in view of the above circumstances, and in consideration of the situation of each battery constituting the power storage device, not only a current command due to a change in DC voltage but also a predetermined bias current is applied to reduce the energy saving rate. An object of the present invention is to provide an elevator control device that enhances.

  (1) In order to solve the above problems, the present invention converts 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. Output the inverter, an electric motor driven by the AC power output from the inverter and driving the car, and output AC power of the variable voltage and variable frequency based on a speed command according to a predetermined driving pattern In an elevator control device provided with drive control means for controlling the inverter, the regenerative power energy is stored during the regenerative operation of the motor, and the stored energy is released to the inverter side during the power running operation of the motor Outputs a current command that depends on the voltage fluctuation of the DC voltage between the power storage device composed of a plurality of batteries and the output line of the rectifier circuit. Current command output means for changing the current bias value based on voltage fluctuations of the DC voltage between the output lines of the rectifier circuit, and setting the current bias value to be added to the current command; and the current bias value And a charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and the power running operation.

  With this configuration, the current command output means changes the magnitude of the current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit. On the other hand, the current bias setting means changes the current bias value, and the charge / discharge current control means performs charge / discharge control with a large current command to reduce the energy consumption on the AC power supply side. The current bias setting means changes the current bias value based on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, adds to the current command from the current command output means, and the charge / discharge current control means Charge / discharge control is performed so that the battery performance degradation is minimized, and the energy during regenerative operation is effectively used, reducing the overall energy consumption of the AC power supply and improving the energy saving rate. Become.

  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 to drive the car, and a drive for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command according to a predetermined driving pattern In an elevator control apparatus provided with a control means, an electric storage 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 electric motor Whether or not the deviation of the storage voltage between the battery and each battery constituting the battery is larger than a predetermined bias tolerance Voltage change monitoring means for monitoring the voltage change of the DC voltage between the output lines of the rectifier circuit when a monitoring result is received from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small. Current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result indicating that the deviation of the decrease is large. And a current bias setting means for changing the current bias value based on a voltage fluctuation of a DC voltage between the output lines of the rectifier circuit and setting it to be added to the current command, and a current command plus the current bias value. And a charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and the power running operation.

  With this configuration, the voltage change monitoring means monitors whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value. The monitoring result is sent to the current command output means and the current bias setting means. When the current command output means receives the monitoring result that the deviation of the storage voltage between the batteries is small, the performance of each battery is sufficiently maintained and functions equally. Change the magnitude of the current command depending on the voltage fluctuation of the DC voltage between lines, and suppress the current depending on the voltage fluctuation of the DC voltage when receiving the monitoring result that the bias of the decrease is large The current command in the direction to be output is output. On the other hand, the current bias setting means changes the current bias value when it receives a monitoring result indicating that the decrease in bias is small from the voltage change monitoring means, and the charge / discharge current control means performs charge / discharge control with a large current command. Reduce the energy consumption on the AC power supply side. Further, the current bias setting means adds to the current bias value when receiving the monitoring result that the deviation of the decrease is large, so that the charge / discharge current control means is in a state where the performance deterioration of each battery is minimized. It is possible to perform charge / discharge control, effectively use energy during regenerative operation, reduce the energy consumption of the AC power supply as a whole, and improve the energy saving rate.

  In addition, if a limiter unit that saturates when the current command plus the current bias value exceeds a predetermined upper limit value and flows the saturated upper limit value as a current command into the charge / discharge current control unit is provided, It is possible to avoid the effects of command runaway and eventually malfunction.

  (2) The present invention also provides a rectifier circuit that converts AC power from an AC power source into DC power, and an inverter that converts the DC power converted by the rectifier circuit into AC power of variable voltage and variable frequency and outputs the AC power. An electric motor driven by the AC power output from the inverter to drive the car, a speed command according to a predetermined driving 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 and variable frequency based on a total torque with a torque compensation value originally added, the regeneration of the motor A plurality of regenerative electric energy stored during operation, and the stored energy released to the inverter side during powering operation of the motor A power storage device comprising a battery, a current command output means for outputting a current command depending on a voltage fluctuation of a DC voltage between the output lines of the rectifier circuit, and a current based on the total torque of the drive control means. Current bias setting means for changing the bias value so as to be added to the current command, and charging / discharging the power storage device during the regenerative operation and power running operation based on the current command plus the current bias value Charge / discharge current control means for controlling the power supply.

  With this configuration, the current command output means changes the magnitude of the current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, so that the voltage fluctuation of the DC voltage is reduced. Output dependent current command.

  On the other hand, the current bias setting means takes in the total torque of the drive control means, changes the current bias value based on the magnitude of the total torque, and sets it to be added to the current command, so that the charge / discharge current control means The charging / discharging control is performed by increasing the current bias value as the total torque increases, thereby greatly reducing the energy consumption on the AC power source side and improving the energy saving rate.

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 power storage device comprising a plurality of batteries that store regenerative power energy during regenerative operation of the electric motor and release the stored energy to the inverter side during power running operation of the electric motor, and each battery constituting the power storage device Voltage variation monitoring means for monitoring whether or not the deviation of the mutual storage voltage decrease is greater than a predetermined bias allowable value, and if the deviation of the storage voltage between the batteries from the voltage change monitoring means is small When the monitoring result is received, the current command that depends on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit is output, and when the monitoring result that the deviation of the decrease is large is received, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation, and a current bias value based on the magnitude of the total torque of the drive control means The charging / discharging to the power storage device is controlled during the regenerative operation and the power running operation based on the current bias setting means that is changed and set to be added to the current command and the current command plus the current bias value. The charge / discharge current control means is provided.

  With this configuration, the voltage change monitoring means monitors whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value. The monitoring result is sent to the current command output means. When the current command output means receives the monitoring result that the deviation of the storage voltage between the batteries is small, the performance of each battery is sufficiently maintained and functions equally. Change the magnitude of the current command depending on the voltage fluctuation of the DC voltage between lines, and suppress the current depending on the voltage fluctuation of the DC voltage when receiving the monitoring result that the bias of the decrease is large The current command in the direction to be output is output.

  On the other hand, the current bias setting means takes in the total torque of the drive control means, changes the current bias value based on the magnitude of the total torque, and sets it to be added to the current command, so that the charge / discharge current control means Increases the current bias value as the total torque increases, but the current command is suppressed when receiving the monitoring result that the bias of the decrease is large, so the performance degradation of each battery is minimized. Charge / discharge control is performed so that the battery is in a state of balance, and when there is little deviation between the batteries, charge / discharge control is performed under a large current command depending on the voltage fluctuation of the DC voltage and according to the magnitude of the torque. The energy consumption on the AC power supply side will be significantly reduced to improve the energy saving rate.

  (3) The current bias can be varied by the current bias setting means by various means as follows.

(I) The current bias value is changed based on the differential change of the DC voltage between the output lines of the rectifier circuit, and added to the current command from the current command output means.

(II) The current bias value is changed based on a decrease in the AC power output from the AC power source, and added to the current command from the current command output means.

(III) The current bias value is changed based on a decrease in weekly power consumption obtained from the motor speed and the total torque of the drive control means, and is added to the current command from the current command output means.

(IV) Based on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, the specified current bias is added to the current command from the current command output means.

  The present invention can provide an elevator control device capable of increasing the energy saving rate by providing a predetermined bias current as well as a current command based on a change in DC voltage.

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 includes a drive control system that supplies required AC power to drive the motor 11, a rope-type elevator that receives the power from the drive control system, and that causes the car 11 to move up and down the car 14, and a charging system. And a discharge 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 Based on the inverter 4 that converts the DC power smoothed by the capacitor 3 into three-phase AC power having a required frequency and supplies the three-phase AC power to the electric motor 11, the speed command according to a predetermined traveling pattern, and the rotational speed of the electric motor 11. A drive control unit 5 that controls the inverter 4 and outputs three-phase AC power having a frequency according to the speed command is provided. Reference numeral 8 denotes a resistance chopper in which the self-extinguishing element 6 and the resistor 7 are serially connected.

  On the other hand, the rope type elevator has a configuration that is generally used conventionally. For example, the electric motor 11, the rope 13 wound around the main sheave 12 connected to the rotating shaft of the electric motor 11, and the rope 13 A swaying sheave that shifts the suspension position of the rope 13 that leads from the main sheave 12 to the counterweight 15 in order to avoid interference between the cab 14 and the counterweight 15 that are respectively suspended at the ends, and the counterweight 14 and the counterweight 15. 16 etc. are provided.

  As the charge / discharge current control system, a plurality of charge / discharge control elements 31a, 31b such as a self-extinguishing element connected between the DC output lines of the rectifier circuit 2 and a common connection of these charge / discharge control elements 31a, 31b are used. A charge / discharge circuit 33 comprising a DC reactor 32 having a function of smoothing DC power, connected to the unit, and connected to the charge / discharge circuit 33, storing regenerative energy during regenerative operation of the electric motor 11, 34n that discharges the energy stored during the power running operation of the motor 11, and the bias that monitors the bias of the decrease in the accumulated voltage between the batteries 34a, ..., 34n. A monitoring means 35; a current command output means 36 for outputting a current command that increases or decreases based on a monitoring result of the bias monitoring means 35; and a monitoring result of the bias monitoring means 35. The current bias setting unit 37 that outputs different current bias values based on the current bias value, the current bias value of the current bias setting unit 37, and the current command of the current command output means 36, and the plurality of charge / discharge control elements 31a and 31b. It is comprised by the charging / discharging electric current control part 38 which performs charging / discharging control.

  The bias monitoring means 35 is a voltage detection unit 35a1,..., 35an that detects the accumulated voltage of each battery 34a,. A bias tolerance is set, and whether or not the deviation of the accumulated voltage of the batteries 34-1 ... 34-n detected by the voltage detectors 35a1, ..., 35an exceeds the bias tolerance, In other words, the voltage change monitoring unit 35b is provided for monitoring whether or not the voltage decrease between the batteries is largely biased, and the monitoring result is sent to the current command output means 36 and the current bias setting unit 37.

  When the current command output means 36 receives a monitoring result indicating that the bias of the decrease in the stored voltage between the batteries 34a,..., 34n is small from the voltage change monitoring unit 35b, the current command output means 36 outputs a predetermined specified voltage command and stores it. A voltage command device 36a that outputs a voltage command that is smaller than the specified voltage command in order to operate in a direction that suppresses the current when receiving a monitoring result indicating that the bias of the voltage decrease is large, and the DC voltage on the smoothing capacitor 3 side A voltage detection unit 36b for detecting the current, a current command value output element 36c for calculating and outputting a current command corresponding to a voltage difference (corresponding to a voltage fluctuation value) between the voltage command device 36a and the voltage detection unit 36b, and the power storage device 34. Current detection unit 36d for detecting the storage current of the battery, and storage of the power storage device 34 detected by the current detection unit 36d from the current command output from the current command value output element 36c. Subtracting the current is constituted by a calculation element 36e for outputting a current command according to a voltage change value of the DC voltage mentioned above.

  The bias current setting unit 37 outputs a predetermined specified current bias value when receiving a monitoring result indicating that the bias of the decrease in the accumulated voltage between the batteries 34a,..., 34n is small from the voltage change monitoring unit 35b. In addition, when a monitoring result indicating that the bias of the stored voltage decrease is large is received, a current bias value smaller than the specified current bias value is output so as not to affect the performance deterioration of each battery 34a,..., 34n. Has function.

  Therefore, as the calculation element 36e constituting the current command output means 36, a current command obtained by adding a current command due to the voltage fluctuation of the DC voltage to the current bias value from the current bias setting unit 37 is output, and the charge / discharge current control unit 38 is output. To send.

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

  In general, the motor 11 is driven using the commercial AC power source 1 and the elevator 14 is controlled to rise and fall. The charge / discharge current control unit 38 determines that the motor 11 is in regenerative operation from the DC voltage of the smoothing capacitor 3. Then, the charging / discharging circuit 33 is controlled to charge, and the regenerative energy generated by the electric motor 11 is stored in the electric storage device 34. On the other hand, if the electric motor 11 is determined to be in the power running operation from the DC voltage of the smoothing capacitor 3, the charging / discharging circuit 33 is discharged, and the energy stored in the power storage device 34 is discharged to the smoothing capacitor 3 side. Therefore, since the energy stored in the power storage device 34 is used during the power running operation of the electric motor 11, it is possible to realize energy saving of the commercial AC power supply 1.

  Furthermore, as long as the performance degradation of the power storage device 34 is not affected, if a large charge / discharge current is supplied to the power storage device 34 during charging / discharging of the charge / discharge circuit 33 to charge / discharge, the energy consumed by the commercial AC power supply 1 is correspondingly increased. It becomes less and it becomes possible to increase the energy saving rate.

  Therefore, in the device according to the present invention, the charge / discharge current control unit 38 determines the voltage difference between the voltage command A shown in FIG. 2A output from the voltage command device 36a and the DC voltage B of the smoothing capacitor 3, that is, the DC by the load. The charge / discharge current is controlled based on the current command signal corresponding to the difference current between the current command shown in FIG. 5B corresponding to the magnitude of voltage fluctuation and the stored current of the power storage device 34 by the current detector 36d. However, a predetermined current bias value shown in FIG. 5C is set from the current bias setting unit 37, and a current command obtained by adding the current command to the current bias value is extracted by the calculation element 36e, and charge / discharge current control is performed. The data is sent to the unit 38.

  The charge / discharge current control unit 38 performs charge / discharge control of the charge / discharge circuit 33 so that the charge / discharge current is based on the current command obtained by adding the current command to the current bias value, and the regenerative energy generated from the motor 11 is stored in the power storage device. 34, and by using the energy stored in the power storage device 34 during powering operation of the electric motor 11, the energy consumption of the commercial AC power source 1 is reduced as much as possible and the energy saving rate is increased.

  However, increasing the charging / discharging current of the charging / discharging circuit 33 is a factor that degrades the performance of the nuclear batteries 34a,.

  Therefore, the voltage change monitoring unit 35b compares the deviation of the accumulated voltage between the batteries 34a,..., 34n constituting the power storage device 34 with a preset bias allowable value, and each battery 34a,. When the bias of the decrease in the stored voltage exceeds the allowable bias value, it is confirmed that the bias of the voltage decrease of each battery 34a,..., 34n is large, and the monitoring result is used as the current bias setting unit 37 and the voltage. It is sent to the command device 36a.

  When the deviation of the accumulated voltage decrease between the batteries 34a,..., 34n is small, the current bias setting unit 37 and the voltage command device 36a output a specified current bias value and a predetermined specified voltage command, respectively. Is received, the current bias setting unit 37 sets a current bias value smaller than the specified current bias value, and the voltage command device 36a is specified to operate in a direction to suppress the current. A voltage command smaller than the voltage command is output. Therefore, while hoping to reduce the energy consumption of the commercial AC power supply 1 as a whole, the charging / discharging current of the charging / discharging circuit 33 is increased while considering the performance deterioration of the power storage device 34, and the energy saving rate is increased.

  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 detailed description thereof will be given in FIG.

  In this embodiment, by providing a limiter circuit 40 between the calculation element 36e and the charge / discharge current control unit 38, the runaway of the current command due to malfunction including failure of each component is avoided, and the power storage device 34 and This prevents damage to the charge / discharge circuit 33.

  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 detailed description thereof will be given in FIG.

  In this embodiment, the voltage change monitoring unit 35b sends to the voltage command unit 36a the monitoring result of the decrease in the accumulated voltage of the batteries 34a,..., 34n constituting the power storage device 34, and the current bias setting unit 35b. Reference numeral 37 denotes a configuration in which a signal based on the magnitude of the torque of the electric motor 11 is input instead of the monitoring result of the voltage change monitoring unit 35b.

Hereinafter, an elevator operation control system that acquires the torque of the electric motor 11 that performs the raising / lowering operation of the car 14 and controls the inverter 4 will be described.
The elevator operation control system includes a speed detection unit 41 that detects the rotation speed of the electric motor 11, and a speed command unit 42 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. And a speed control unit 43 that compares the speed command from the speed command unit 42 with the detected speed of the speed detection unit 41 and calculates and outputs a torque command value such that the deviation becomes zero, for example, the car 14 And a load detection switch 44 composed of a plurality of switch elements that are selectively turned on in accordance with the load weight.

  The load detection switch 44 is, for example, a switch element 44 (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. A switch element 44 (2) that operates sometimes and a switch element 44 (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 45. The load signal calculation unit 45 converts the load signal detected by the load detection switches 44 (1) to 44 (3) into a torque compensation value and outputs the torque compensation value. For example, the load detection switches 44 (1), 44 (2) The load signal detected at 44 (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 46 that calculates and outputs the total torque command value of the torque command from the speed control unit 43 and the torque compensation value from the load signal calculation unit 45, and the output of the inverter 4. An inverter current detection unit 47 for detecting an inverter current, a 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 47. An inverter current control unit 48 and the like for controlling the phase power conversion component are provided.

  Accordingly, since the total torque of the electric motor 11 considering the torque compensation value can be obtained from the torque command determination unit 46 according to the loaded weight of the car 14, the torque command determination unit 46 extracts the magnitude of the torque or the torque value itself. And sent to the current bias setting unit 37. The current bias setting unit 37 outputs a specified current bias value when receiving a large torque signal from the torque command determining unit 46, and a current bias value smaller than the specified current bias value when receiving a small torque signal including the middle. Is output. A configuration may be adopted in which the current bias value is subdivided and output by dividing it into an intermediate torque force signal and a small torque force signal.

  Therefore, according to the embodiment as described above, when the loading weight of the car 14 is heavy, not only a large regenerative energy is generated during the regenerative operation but also the torque is large. When a large regenerative energy can be stored in the power storage device 34 under a large charging current and a large power running energy is required during power running, but the loading weight of the car 14 is heavy Since the torque is large as described above, a current command with a specified current bias added can be output, and the energy stored in the power storage device 34 can be discharged under a large discharge current. Energy consumption can be reduced, and the energy saving rate can be increased.

  Note that the current bias may be sequentially changed and output according to the magnitude of the torque without being divided into the magnitudes of the torque.

  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 FIGS. 1 and 4 are denoted by the same reference numerals, and detailed description thereof will be given in FIGS.

  In this embodiment, a limiter circuit 40 is provided between the arithmetic element 36e and the charge / discharge current control unit 38, as in FIG. 3, to avoid a runaway current command due to a malfunction including a failure of each component and the like. Damage to the device 34 and the charge / discharge circuit 33 is avoided in advance.

  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 detailed description thereof will be given in FIG.

  In this embodiment, a predetermined voltage fluctuation value is set in advance as the voltage detection unit 36, the voltage fluctuation of the DC voltage on the smoothing capacitor 3 side is compared with the predetermined voltage fluctuation value, and the voltage fluctuation of the DC voltage is predetermined. When the voltage fluctuation value exceeds the voltage fluctuation value, a signal indicating a large voltage fluctuation or an actual voltage fluctuation is output, and when the voltage fluctuation of the DC voltage does not exceed the predetermined voltage fluctuation value, a signal indicating a small voltage fluctuation or The actual voltage fluctuation is output and sent to the current bias setting unit 37.

  The current bias setting unit 37 outputs a specified current bias value based on a signal indicating a large voltage fluctuation or an actual voltage fluctuation, and is smaller than the specified current bias value based on a signal indicating a small voltage fluctuation or an actual voltage fluctuation. Current bias value is output, and the current command determined from the bias voltage of the capacitor 3 side, the storage current of the power storage device 34, and the voltage decrease of each battery constituting the power storage device 34 is stacked on the current bias value. The current command is sent to the charge / discharge current control unit 38.

  The charge / discharge current control unit 38 uses more of the stored energy of the power storage device 34 by performing on / off control at a high speed so as to increase the charge / discharge current for the charge / discharge circuit 33 when voltage fluctuations increase. As a result, the energy consumption of the commercial AC power source 1 can be reduced and the energy saving rate can be increased.

  Although the voltage fluctuation is divided into large and small, for example, if the actual voltage fluctuation calculated by the voltage detection unit 36 is sent to the current bias setting unit 37 as it is, the current continuously changes according to the actual voltage fluctuation. The bias value can be changed and output.

FIG. 7 is a block diagram showing still another embodiment of the elevator control apparatus according to the present invention.
In the embodiment, a differential calculation element (not shown) is provided between the voltage detection unit 36 and the current bias setting unit 37, and the voltage change of the DC voltage on the smoothing capacitor 3 side with respect to time t by this differential calculation element, that is, The differential value dv / dt is taken out. At this time, the differential value is large when the load of the motor 11 is large, and the differential value is small when the load is small. Therefore, even if the current bias setting unit 37 varies and outputs the current bias value based on the differential value. Good.

  Furthermore, in the elevator control device according to the present invention, a voltage detection unit (not shown) is provided on the output side of the commercial AC power supply 1, and the power supply voltage of the commercial AC power supply 1 detected by the voltage detection unit is set to a current bias. The current bias value may be changed according to a drop in the power supply voltage.

  Further, in the elevator control device according to the present invention, the output torque T of the torque command determination unit 46 and the rotation speed w of the motor 11 detected by the speed detection unit 41 shown in FIG. Since the power consumption P can be obtained by multiplying by the speed w, the obtained power consumption P is sent to the current bias setting unit 37, and the current bias value is changed in accordance with the reduction in power consumption. Also good. Incidentally, P = T × w ← = V × I ×%, and the power consumption P can be expressed as V × I ×% with respect to the power output V × I. Even w can be expressed.

  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 figure which shows the relationship between the original electric current command with respect to the smoothing capacitor side DC voltage, and a current bias value. 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 figure explaining the relationship between the differential value which is a voltage change with respect to time, and a load. 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, 5 ... Drive control part, 11 ... Electric motor, 12 ... Main sheave, 13 ... Rope, 14 ... Ride car, 15 ... Counterweight, 31a , 31b ... charge / discharge control element, 33 ... charge / discharge circuit, 34 ... power storage device, 34a, ..., 34n ... battery, 35 ... bias monitoring means, 35a1, ..., 35an ... voltage detector, 35b ... voltage change monitor, 36 ... Current command output means, 36a ... Voltage command device, 36b ... Voltage detection unit, 36c ... Current command value output element, 36d ... Current detection unit, 36e ... Calculation element, 37 ... Bias current setting unit, 38 ... Charging / discharging current Control unit 40 ... Limiter circuit 41 ... Speed detection unit 42 ... Speed command unit 43 ... Speed control unit 44 ... Load detection switch 45 ... Load signal calculation unit 46 ... Torque command determination unit 47 ... inverter current detection unit, 48 ... inverter current controller.

Claims (14)

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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
A current bias setting means for changing a current bias value based on a voltage fluctuation of a DC voltage between the output lines of the rectifier circuit and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
A current bias setting means for changing a current bias value based on a voltage fluctuation of a DC voltage between the output lines of the rectifier circuit and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. In the elevator control device according to claim 1 and 2,
Limiter means is provided that saturates when the current command plus the current bias value exceeds a predetermined upper limit value, and flows into the charge / discharge current control means using the saturated upper limit value as a current command. Elevator control device. 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 speed of the motor, and a torque compensation value added based on the 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 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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
A current bias setting means for changing a current bias value based on the magnitude of the total torque of the drive control means and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 speed of the motor, and a torque compensation value added based on the 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 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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
A current bias setting means for changing a current bias value based on the magnitude of the total torque of the drive control means and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. In the elevator control device according to claim 4 and 5,
Limiter means is provided that saturates when the current command plus the current bias value exceeds a predetermined upper limit value, and flows into the charge / discharge current control means using the saturated upper limit value as a current command. Elevator control device. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
A current bias setting means for changing a current bias value based on a differential change of a DC voltage between the output lines of the rectifier circuit and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
A current bias setting means for changing a current bias value based on a differential change of a DC voltage between the output lines of the rectifier circuit and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
A current bias setting means for changing the current bias value based on a decrease in the AC power output from the AC power supply and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
A current bias setting means for changing the current bias value based on a decrease in the AC power output from the AC power supply and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
A current bias setting means for changing the current bias value based on a decrease in power consumption obtained from the motor speed and the total torque of the drive control means, and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 speed of the motor, and a torque compensation value added based on the 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 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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
A current bias setting means for changing the current bias value based on a decrease in power consumption obtained from the motor speed and the total torque of the drive control means, and setting the current command to be added to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Current command output means for outputting a current command depending on voltage fluctuation of a DC voltage between output lines of the rectifier circuit;
Current bias setting means for adding a specified current bias value to the current command;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value. 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 And a drive control means for controlling the inverter to output AC power of the variable voltage and variable frequency based on a speed command corresponding to a predetermined travel pattern. In the elevator control device,
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;
Voltage change monitoring means for monitoring whether or not the deviation of the storage voltage between the batteries constituting the power storage device is larger than a predetermined bias allowable value;
When receiving a monitoring result from the voltage change monitoring means that the deviation of the stored voltage between the batteries is small, output a current command depending on the voltage fluctuation of the DC voltage between the output lines of the rectifier circuit, A current command output means for outputting a current command in a direction to suppress the current while depending on the voltage fluctuation of the DC voltage when receiving a monitoring result that the deviation of the decrease degree is large;
When a monitoring result is received from the voltage change monitoring means that the deviation of the degree of decrease is small, a specified current bias value is added to the current command, and when a monitoring result is received that the deviation of the degree of reduction is large. Current bias setting means for adding a current bias value smaller than the specified current bias value;
An elevator control device comprising charge / discharge current control means for controlling charge / discharge of the power storage device during the regenerative operation and power running operation based on a current command plus the current bias value.

Images