JP2005053628A - Elevator controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively obtain energy saving effect by effectively utilizing commercial electric power and regenerative electric power even when power running operation frequency of an elevator differs depending on type of building and difference of application. <P>SOLUTION: Electric power of commercial power supply 1 is converted into direct current electric power by a converter 2, and this direct current electric power is reversely converted into alternate current electric power having variable voltage and variable frequency by an inverter 4 to operate an electric motor 5 at variable speed based on alternate current output of the inverter 4. A capacitor 7 charged by direct current electric power rectified by the converter 2 or power generation electric power regenerated onto a direct current circuit side from the electric motor 5 is provided on a direct current input side of the inverter 4. A charging and discharging circuit 6 for charging and discharging electric power stored in the capacitor is provided. A control circuit 14 controls charging and discharging of electric power stored in the capacitor 7 and changes setting of a time zone in which charging and discharging control from the capacitor 7 is mainly performed freely based on the detection of power running operation frequency of the elevator. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

 The present invention relates to an elevator control device that reduces power consumption of a commercial power supply by supplying power necessary for driving an electric motor from a power storage device in addition to a method of supplying the power from only the commercial power supply.

 In the elevator, a suspension rope is hung around a sheave of an electric motor installed at the top of a hoistway, a car is suspended at one end of the suspension rope, and a counterweight is suspended at the other end. When the electric motor is driven and controlled, the car and the counterweight are raised and lowered in opposite directions.

 In the electric motor, DC power is obtained from AC power of a commercial power source through a converter, and this DC power is supplied to an inverter with pulsation suppressed by a smoothing capacitor, and converted to AC power of variable voltage and variable frequency by this inverter. Electric power is supplied to the electric motor, and the electric motor is operated at a variable speed.

 In such an electric power supply system for an electric motor, when the electric motor is decelerated while driving at a variable speed, or when the electric motor load works in the direction of rotating the electric motor even when no commercial power is supplied, the generated torque of the electric motor Becomes negative (hereinafter referred to as regenerative operation).

 For example, the balance weight of the elevator is set to be lighter than the weight of the car, so when the car is raised, the motor is in a power running state where it is supplied with power from the main power circuit, and when the car is lowered, the motor at this time The kinetic energy possessed by the load becomes regenerative power and enters a regenerative operation state in which the kinetic energy is returned to the DC circuit via the inverter, and the voltage of the DC circuit is increased.

 As a countermeasure, a discharge circuit consisting of a discharge resistor and a switching element is provided in the DC circuit. When the DC voltage approaches the overvoltage level, the switching element is turned on and the discharge resistor is connected to the DC circuit. There is a method for suppressing overvoltage by converting the energy into heat energy and consuming it. However, it is not desirable from the viewpoint of energy saving to consume the regenerative power as thermal energy by the discharge resistor.

 As another countermeasure, there is a method that uses a converter that can convert power bidirectionally (AC → DC, DC → AC) and regenerates the regenerative power generated from the motor side to the commercial power supply side. The circuit configuration and its control become complicated.

On the other hand, in recent years, a power storage device is connected to a DC circuit, and electric power regenerated from the electric motor is stored in the electric power storage device, and the electric energy is stored when the electric motor performs a power running operation (power is supplied from a commercial power source). There has been proposed a method (energy saving operation) that reduces the consumption of commercial power by supplying it for driving an electric motor.
JP 2000-318938 A JP2003-165678A

 In this case, supplying power from the power storage device in a specific time zone is an effective means in consideration of the fact that the frequency of elevator usage in a day varies depending on the time zone. Therefore, the method for uniformly determining the time zone for charging / discharging the stored energy from the power storage device is not necessarily a good solution.

 In addition, it has been found that the amount of power demanded by the power companies from around the country peaks during times that do not depend on the frequency of elevator use. It is known that there is a large difference between the electricity rate and the electricity rate during the daytime when demand is at its peak.

 If the above points are not taken into consideration, it will not be the original energy saving from the power supply side, and it will not be a countermeasure against power shortage.

 Accordingly, the present invention has been made to solve the above-described problem. In consideration of the case where the operation frequency of the elevator varies depending on the type of building and the use, the energy saving effect is achieved by effectively using commercial power and regenerative power. An object of the present invention is to provide an elevator control device capable of effectively obtaining the above.

 In order to solve the above problems, the present invention provides a commercial power source, a converter that converts the power of the commercial power source into DC power, an inverter that converts DC power back into AC power of variable voltage and variable frequency, and AC of the inverter A control circuit that operates the motor at a variable speed based on the output; and a power storage device that is provided on the DC input side of the inverter and that can be charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side A charging / discharging circuit that charges and discharges the electric power stored in the power storage device, and the control circuit controls charging / discharging of the electric power stored in the power storage device and performs charge / discharge control from the power storage device with priority. It is possible to change the setting freely.

  One aspect of the control circuit is a circuit that automatically changes the setting of charge / discharge control in response to outputs from the load sensor, position sensor, and start-up counter of the car.

  In this case, the control circuit can perform charge / discharge control in a focused manner in accordance with a time zone in which the demand for the power company peaks among the daily power consumption.

 In addition, the control circuit has multiple types of time periods in which charge / discharge control is focused on the day as the time period during which the power demand to the electric power company is peaking changes according to the climate of the year. Can have.

 Furthermore, the control circuit sets the time zone in which charge / discharge control is prioritized according to the power running frequency of the elevator during the day, and the actual situation of the elevator car running frequency deviates from the assumed time zone It is also possible to automatically correct it.

 In addition, the control circuit can change the ratio of the amount of power supplied from the power storage device to the inverter input unit to the amount of power when only the commercial power supply is supplied to the inverter input unit depending on the time of day.

 Furthermore, the control circuit determines the ratio of the amount of power supplied from the power storage device to the inverter input unit to the amount of power supplied from the commercial power source only to the inverter input unit. It can also be made variable according to the time zone.

 In addition, the control circuit should have a plurality of ratios of the amount of power supplied from the power storage device to the inverter input unit to the amount of power supplied from the commercial power source to the inverter input pad in accordance with the yearly climate change. You can also.

  In addition, the control circuit can vary the ratio of the amount of power supplied from the power storage device to the inverter input unit to the amount of power supplied from the commercial power source to the inverter input unit according to the power running frequency of the elevator during the day. It can also be.

 In addition, the control circuit sets the ratio of the amount of power supplied from the power storage device to the inverter input unit to the amount of power when only the commercial power supply is supplied to the inverter input unit according to the power running frequency of the elevator during the day However, when the actual state of the elevator car operation frequency is deviated from the assumed time zone, the previously set energy saving rate can be automatically corrected.

According to the present invention, the content of the charge / discharge control (energy saving rate, etc.) is focused on the charge / discharge in a necessary time zone, so that the method or the charge / discharge control is made common throughout the day or year. Compared with the method of uniformly setting the belt, the efficiency of energy saving operation can be increased, and the life of the power storage device can be extended.
It is possible to reduce the supply load of the power company and to increase the electricity bill by focusing on the time when charging / discharging is particularly focused on the time when power demand peaks during the day. It is possible to reduce the amount (charge) consumed in the time zone.
In addition, as time periods when power demand to electric power companies peak change according to the climate of the year, by responding to multiple periods of time periods that focus on charge / discharge control of the day, Enables more optimal power-saving operation.

 Furthermore, a method for initial setting uniformly according to the assumed powering operation frequency of the elevator by automatically correcting the time zone for charging and discharging the electric power stored in the power storage device according to the actual powering operation frequency of the elevator, and In comparison, the effect of energy saving operation can be enhanced.

 In addition, by changing the energy saving rate during energy saving operation according to the time of the day, the charge / discharge control method (energy saving rate, etc.) is shared throughout the day or year, or the time of charge / discharge control. Compared with the method of uniformly setting the charging / discharging amount within a certain period, the efficiency of the energy saving operation can be increased and the life of the power storage device can be extended.

 Furthermore, by making the energy-saving rate when performing energy-saving operation during the day variable according to the time when the power demand of the power company peaks, it becomes possible to reduce the supply load of the power company, It is possible to reduce the amount (fee) consumed during the high electricity bill.

 In addition, as the time when power demand to power companies peaks changes according to the climate of the year, the energy saving rate when performing energy saving operation in one day is handled by multiple types, Enables more optimal power-saving operation.

 In addition, by changing the ratio of energy saving operation during the day according to the frequency of power running of the elevator during the day, the contents of the charge / discharge control (energy saving rate, etc.) can be changed throughout the day and year. Compared with the common method or the method of uniformly setting the time zone for charge / discharge control, the efficiency of energy-saving operation can be increased and the life of the power storage device can be improved by reducing the maximum charge / discharge within a certain period. Can be extended.

  In addition, if the ratio of performing energy saving operation during the day is variable according to the power running frequency of the elevator during the day, the actual state of the elevator power running frequency deviates from the assumed time zone. By automatically correcting the energy saving rate set to, the effect of energy saving operation can be further enhanced.

 FIG. 1 is an overall configuration diagram of an elevator control device showing an embodiment of the present invention. In FIG. 1, the power source main circuit is converted by a converter 2 that converts commercial AC power from a commercial power source 1 into DC power, a smoothing capacitor 3 that suppresses pulsation of DC voltage converted by the converter 2, and a converter 2. The inverter 4 is configured to convert DC power into AC power having variable voltage and variable frequency. An electric motor 5 constituting an elevator hoisting machine is connected to the AC output side of the inverter 4, and the electric motor 5 is based on the AC output of the inverter 4. Variable speed operation. As this electric motor 5, an induction motor or a permanent magnet type synchronous motor is used.

 The DC circuit between the converter 2 and the inverter 4 is provided with a power storage device 7 composed of a battery or an electric double layer capacitor that charges and discharges electric power via a step-up / step-down chopper circuit (charge / discharge circuit) 6 described later.

 The step-up / step-down chopper circuit 6 is connected between the DC circuit and the power storage device 7, and generates DC power (commercial power) converted by the converter 2 or regenerative power regenerated from the motor 5 to the DC circuit side by a step-down chopper operation. The electric power is stored in the power storage device 7, and power is discharged from the power storage device 7 to the DC circuit side by a step-up chopper operation when the power running operation of the electric motor 5 or the voltage of the DC circuit decreases.

 In other words, the step-up / step-down chopper circuit 6 connects a series circuit of switching elements 10 and 11 having diodes 8 and 9 connected in reverse parallel to a DC circuit, and also connects a series connection point of the switching elements 10 and 11 and the power storage device 7. A reactor 12 is connected between them.

 The switching operation of the switching elements 10 and 11 is controlled by the control circuit 13. The control circuit 13 is a control circuit that controls the operation of the elevator car by operating the electric motor 5 at a variable speed. The control circuit 13 is connected to a voltage detection device 14 that detects the voltage of the DC circuit and a voltage detection device 15 that detects the voltage of the power storage device 7. The control circuit 13 is connected to a load sensor 16 provided in the car and a position sensor 17 provided in the hoistway for detecting the position of the car. Information that provides information such as demand and time of occurrence in comparison with power supply capacity), power demand curves (curves that represent power demand that varies greatly depending on conditions such as day of the week and season), and external information such as weather forecasts (temperature) A power source 18 is connected, and on the basis of these pieces of information, the frequency of use of the elevator, the number of power running operations, the power, etc. are provided by the functions of the activation number counter 19, the calendar, the clock means 20, the car travel distance meter 21 in the control circuit 13, etc. A peak of consumption is detected, and the calculation unit 22 is configured to control so as to achieve optimum energy saving for the operation of the elevator.

 In the power supply system having such a configuration, the DC power converted from the commercial AC power supply 1 by the converter 2 is first charged by the smoothing capacitor 3, but the electrostatic capacity of the power storage device 7 is insufficient (initial state). In this case, the voltage is stepped down (smoothing capacitor 3 is discharged) via switching element 10 and reactor 12, and DC power is supplied to power storage device 7. When the electric motor 5 enters operation and enters a regenerative operation state, regenerative power is supplied to the DC circuit and the DC voltage rises. This DC voltage is detected by the voltage detection device 14 provided in the DC circuit, and the control circuit 13 turns on the switching element 10 when the DC voltage becomes equal to or higher than a preset value.

 Thus, regenerative power is supplied from the DC circuit to power storage device 7 via switching element 10 and reactor 12. At this time, current energy is stored in the reactor 12. After that, by turning off the switching element 10, the current energy stored in the reactor 12 flows through the closed loop of the diode 9, the reactor 12, and the power storage device 7 connected in reverse parallel to the switching element 11 and is stored in the power storage device 7. Is done.

 FIG. 2 is a time chart showing the step-down chopper operation, and shows the relationship between the DC voltage of the DC circuit, the ON / OFF operation of the switching element 10, the current i flowing through the circuit, and the voltage of the power storage device 7.

 When the electric motor 5 is in a regenerative operation state, the regenerative power increases the DC voltage of the DC circuit, and the switching element 10 is turned ON when the DC voltage becomes higher than a set value. Then, current i flows from the DC circuit through switching element 10 and reactor 12, and electric power is stored in power storage device 7. The switching element 10 is turned off when the current i is about to exceed the allowable current of the switching element 10 itself or when the DC voltage is about to become zero. After the switching element 10 is turned off, the current energy stored in the reactor 12 flows through the closed loop of the diode 9, the reactor 12, and the power storage device 7, attenuates with a time constant, and is stored in the power storage device 7.

 When the switching element 10 is turned off, the DC voltage rises again and becomes equal to or higher than the set value, the switching element 10 is turned on and power storage is started again, and thereafter the same operation is repeated.

 On the other hand, when the electric motor 5 is in a power running state, the switching element 11 shown in FIG. 1 is turned on. As a result, the power storage device 7 is discharged in a closed loop of the reactor 12, the switching element 11, and the power storage device 7, and current energy is stored in the reactor 12. At this time, when the switching element 11 is turned off, the current energy stored in the reactor 12 is discharged to the DC circuit through the reactor 12 and the diode 8 to supply power to the DC circuit.

 When the emitted power is attenuated, the switching element 11 is turned on again, the current energy of the reactor 12 is accumulated, and then the power is released when the switching 11 is turned off. Thereafter, the same operation is repeated.

 The capacitance of the power storage device 7 is detected by a voltage detection device. When the capacitance is insufficient, the capacitance is lowered (the smoothing capacitor 3 is discharged) from the DC circuit via the switching element 10 and the reactor 12. DC power is supplied to the power storage device 7.

 It should be noted that when ON / OFF control of the switching elements 10 and 11 is performed, the powering operation / regenerative operation of the electric motor 5 is detected by detecting whether the DC voltage of the DC circuit on the input side of the inverter 4 is sufficient or insufficient. In addition to being able to be determined by the control circuit 13 by detecting with the device 14, it can also be performed by detecting the speed of the electric motor 5.

 With this configuration, when the electric motor 5 is performing a regenerative operation, the generated energy is stored in the power storage device 7 and stored when the electric motor 5 is performing a power running operation or when the DC voltage of the DC circuit is reduced. The released energy can be released from the power storage device 7. If a protection circuit 25 composed of a series circuit of the discharge resistor 23 and the switching element 24 is connected to the DC circuit and the energy generated from the electric motor 5 is excessive with respect to the capacity of the power storage device 7, the control circuit 13 Thus, the switching element 24 can be operated so that surplus energy flows into the discharge resistor 23.

 Next, a charge / discharge control method for energy saving operation will be described with reference to FIG. FIG. 3 shows a conventional control method in which a time zone for performing charge / discharge control is limited when performing energy saving operation, and a time zone for performing charge / discharge control is set based on an elevator usage frequency (times / h). Show. Here, 26 represents the daily use frequency of the elevator, and 27 represents a time zone in which charge / discharge control is prioritized in the form of a timing chart. The charge / discharge control is not necessarily performed in a time zone other than the time zone in which the charge / discharge control is focused.

 The first embodiment of the present invention is characterized in that the time zone of charge / discharge control by the control circuit 13 is not uniformly determined, and the setting can be freely changed.

 As shown in FIG. 3, there is a control method for performing efficient energy-saving operation by performing charge / discharge control for the power storage device in a time zone in which the elevator is frequently used, but requires more power than a commercial power supply. This timing depends on the amount of power running rather than the frequency of elevator use. In addition, the time period during which the elevator is frequently operated varies greatly depending on the purpose of the building (office building, condominium, etc.). According to the first embodiment of the present invention, the contents of charge / discharge control (such as the energy saving rate) are made common throughout the day or year by focusing on the number of times of charge / discharge in a necessary time zone. Compared with a method of uniformly setting a time zone for performing charge / discharge control, the efficiency of energy-saving operation can be increased, and the life of the power storage device can be extended.

  Next, a second embodiment of the present invention will be described. In the second embodiment, charge / discharge control is performed by the control circuit 13 in the same manner as the first embodiment. However, in the amount of power consumed per day, the time is adjusted to the time when the demand for the power company peaks. Therefore, charge / discharge control is focused on.

  This embodiment will be described with reference to FIG. In FIG. 4, 28 represents a change in demand for the electric power company for one day. As described above, it is known that power (kw) more than twice as much as that in a small time period is required in a time period when there is a large demand. Reference numeral 29 denotes a time zone in which charge / discharge control is focused in the present embodiment in the form of a timing chart, and is characterized in that charge / discharge control is performed particularly during a time zone when there is a great demand for power.

 According to the present embodiment, it is possible to reduce the supply load of the electric power company, and it is possible to reduce the amount (fee) consumed in the time zone when the electricity rate is high.

  Next, a third embodiment of the present invention will be described. In the present embodiment, with respect to the charge / discharge control by the control circuit 13, the daily charge / discharge control is emphasized as the time when the power demand to the power company peaks changes according to the climate of the year. It is characterized by having a plurality of types of time zones.

  This embodiment will be described with reference to FIG. In FIG. 5, 28 represents a change in demand for the electric power company during a certain period of time. In contrast, in order to adapt to the environment, for example, during the spring and fall in one year. The demand transition 30 at a time when the power demand required for the power supply is relatively small compared to other times is shown. Reference numeral 31 represents a time zone of charge / discharge control for the demand transition 30 in the form of a timing chart. In this way, if it is known that power demand can be relatively small throughout the year, more optimal power-saving operation can be achieved by controlling so that the time period during which charge / discharge control is prioritized is reduced. can do.

  Next, a fourth embodiment of the present invention will be described. In the present embodiment, the time zone in which the charge / discharge control by the control device 13 is prioritized is set according to the usage frequency of the elevator during the day, and the previously set time zone is actually used frequently. It is characterized in that it automatically corrects when it deviates from the time zone.

  This embodiment will be described with reference to FIGS. 6 and 7. FIG. In FIG. 6, reference numeral 32 represents the frequency (times / h) of powering operation during daily elevator operation in an office building or the like. In FIG. 7, 34 represents the frequency of power running in daily elevator operation in an apartment or the like, which is different from the power running frequency of FIG. 6. In FIG. 3, since it is the frequency of use of an elevator for an office building or the like, a peak appears at the time of working, lunch break, and leaving work. However, it is separate from the fact that the frequency of elevator use is high and the amount of electric power required for the elevator drive device, but rather the amount of electric power required for the elevator drive device when the frequency of power running is high. Become. Moreover, it turns out that the frequency of a power running operation changes like FIG. 6 and FIG. 7 with the use of a building. Here, the time period during which charge / discharge control is prioritized is initially set as shown in the timing chart of 33 in FIG. 6 and 35 in FIG. 7, but the frequency of power running depends on the use of the building. Since it is known that there is a difference, the high and low frequency is re-recognized according to the actual state of the power running frequency, and the time zone in which charge / discharge control is focused is automatically corrected.

 According to the present embodiment, compared to a method in which the time period for mainly charging and discharging the electric power stored in the power storage device is uniformly set according to the assumed elevator usage frequency, it is automatically set according to the actual usage frequency. By correcting, the effect of energy saving operation can be enhanced.

  Next, a fifth embodiment of the present invention will be described. In the present embodiment, regarding charge / discharge control by the control circuit 13, the ratio of the amount of power when supplying power from the power storage device to the inverter input unit to the amount of power when supplying only the commercial power source to the inverter input unit (energy saving rate) Is variable according to the time of day. Here, the meaning of variable means that it is not discontinuous but changes continuously.

 According to the present embodiment, by making the energy-saving rate when performing energy-saving operation variable according to the time zone of the day, the content of the charge / discharge control (energy-saving rate etc.) is made common throughout the day or year or Compared with the method of uniformly setting the time period for charge / discharge control, the amount of charge / discharge within a certain period is reduced, so the efficiency of energy-saving operation can be increased and the life of the power storage device can be extended. .

  Next, a sixth embodiment of the present invention will be described. In the present embodiment, for charge / discharge control by the control circuit 13, the ratio (energy saving rate) of the amount of power supplied from the power storage device to the inverter input unit to the amount of power when only the commercial power source is supplied to the inverter input unit, It is characterized by being variable according to the time of day when the power demand to the electric power company peaks during the day.

  This embodiment will be described with reference to FIG. Reference numeral 35 denotes an energy saving rate that is continuously changed in accordance with the peak of the electric power demand 28 to the electric power company. As shown in the figure, the amount of power supplied from the power storage device is set in proportion to the power demand curve.

 According to the present embodiment, it is possible to reduce the supply load of the electric power company, and it is possible to reduce the amount (fee) consumed in the time zone when the electricity rate is high.

  Next, a seventh embodiment of the present invention will be described. In the present embodiment, for charge / discharge control by the control circuit 13, the ratio (energy saving rate) of the amount of power supplied from the power storage device to the inverter input unit to the amount of power when only the commercial power source is supplied to the inverter input unit, It is characterized by having multiple species according to the annual climate change.

  This embodiment will be described with reference to FIG. 28 and 30 represent the daily power demand at different times of the year. Reference numerals 36 and 37 denote energy saving rates that are continuously changed in accordance with a demand transition at a time when the power demand required to adapt to the environment is relatively small. As shown in this figure, paying attention to the fact that the power demand curve changes up and down throughout the year, a plurality of set values for the amount of power supplied from the power storage device are selected and applied as necessary.

 According to the present embodiment, a plurality of energy-saving rates when performing energy-saving operation during the day are adjusted in accordance with the change of the time when the power demand to the power company peaks in accordance with the climate of the year. By responding to seeds, more optimal power-saving operation is possible.

  Next, an eighth embodiment of the present invention will be described. In the present embodiment, regarding charge / discharge control by the control circuit 13, the ratio (energy saving rate) of the amount of power supplied from the power storage device to the inverter input unit to the amount of power supplied from the commercial power source to the inverter input unit is described. It is characterized by being variable according to the power running frequency of the elevator during the day.

  This embodiment will be described with reference to FIG. Reference numeral 32 represents the daily power running frequency of the elevator. Reference numeral 38 denotes an energy saving rate that is continuously changed in accordance with the peak of the power running frequency of the elevator. As shown in the figure, the amount of power supplied from the power storage device is set in proportion to the power running frequency curve.

 According to the present embodiment, the content of the charge / discharge control (energy saving rate) is made by making the energy saving rate when performing energy saving operation during the day variable according to the power running frequency of the elevator during the day. Etc.) to improve the efficiency of energy-saving operation by reducing the amount of charge and discharge within a certain period of time compared to the method that makes common throughout the day and year, or the method that uniformly sets the time period for charge / discharge control. And the life of the power storage device can be extended.

  Next, a ninth embodiment of the present invention will be described. In the present embodiment, the ratio of the amount of power supplied from the power storage device to the inverter input unit for charge / discharge control by the control circuit 13 to the amount of power supplied from the commercial power source to the inverter input unit (energy saving rate) Set according to the power running frequency of the elevator during the day, and automatically correct the energy saving rate set earlier when the actual state of the power running frequency deviates from the assumed time zone. Features.

  About this Embodiment, although the setting of an energy-saving rate is initialized as shown in FIG. 10, since it turns out that the frequency of power running is different like FIG. 7 with the use of a building, the actual condition of power running frequency The frequency of frequency is re-recognized according to the situation and the energy saving rate setting curve is automatically corrected.

  According to the present embodiment, the energy saving rate at the time of performing energy saving operation during the day is variable according to the power running frequency of the elevator during the day, and the actual situation of the elevator car running frequency is assumed. The effect of energy saving operation can be further enhanced by automatically correcting the previously set energy saving rate when the belt is displaced from the belt.

It is a whole lineblock diagram showing the elevator control circuit by the present invention. It is a time chart which shows the pressure | voltage fall chopper operation | movement by the elevator control apparatus of this invention shown in FIG. It is a graph which shows the driving | running pattern which performs the conventional energy-saving driving | operation. It is a graph which shows the energy-saving operation pattern with respect to the electric power demand throughout the day. It is a graph which shows the energy-saving operation pattern with respect to the electric power demand through the day from which time differs. It is a graph which shows the energy-saving operation pattern with respect to the power running frequency of the elevator in an office building etc. It is a graph which shows the energy saving operation pattern with respect to the power running frequency of the elevator in an apartment. It is a graph which shows the energy-saving rate setting pattern with respect to the electric power demand throughout the day. It is a graph which shows the energy-saving rate setting pattern with respect to the electric power demand through the day from which time differs. It is a graph which shows the energy-saving rate setting pattern with respect to the power running frequency of the elevator in an office building etc.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Commercial power supply 2 ... Converter 3 ... Smoothing capacitor 4 ... Inverter 5 ... Electric motor 6 ... Buck-boost chopper circuit (charge / discharge circuit)
7 ... Power storage devices 8, 9 ... Diodes 10, 11 ... Switching element 12 ... Reactor 13 ... Control circuit 14, 15 ... Voltage detection device 16 ... Load sensor 17 ... Position sensor 18 ... External information source 19 ... Start-up counter 20 ... Calendar , Clock means 21 ... travel distance meter 22 ... calculation unit 23 ... discharge resistor 24 ... switching element 25 ... protection circuit 26 ... daily use frequency of elevator 27, 29, 31, 33, 35 ... timing chart 28 of charge / discharge control , 30 ... Daily demand shift to power company 32 ... Elevator power running frequency in office buildings 34 ... Elevator power running frequency in condominiums, etc. 36, 37 ... Energy savings set by daily demand trend to power company Rate pattern 38 ... Energy saving rate pattern set according to the power running frequency in office buildings, etc.

Claims (9)

  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charge / discharge circuit for charging / discharging the battery, and the control circuit freely sets means for controlling charge / discharge of power stored in the power storage device and a time zone in which charge / discharge control from the power storage device is prioritized. And an elevator control device.  The elevator control device according to claim 1, wherein the control circuit automatically changes the setting of the charge / discharge control in response to the outputs of the load sensor, the position sensor, and the start number counter of the car.  A commercial power source, a converter that converts the power of the commercial power source into DC power, an inverter that converts the DC power back into AC power with a variable voltage variable body frequency, and an electric motor that operates at a variable speed based on the AC output of the inverter A control circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and stored in the power storage device A charging / discharging circuit for charging / discharging electric power, and the control circuit controls charging / discharging of the electric power stored in the power storage device, and the time period when the electric power demand to the electric power company is peaked is a one-year climate. An elevator control device characterized by having a plurality of types of time zones during which charge / discharge control for one day is focused on as it changes.  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charging / discharging circuit for charging / discharging the elevator, and the control circuit controls the charging / discharging of the electric power stored in the power storage device and performs the power running operation of the elevator during a day when the charge / discharge control is prioritized. The elevator is set according to the frequency and is automatically corrected when the actual state of the elevator power running frequency deviates from the assumed time zone. Motor controller.  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charge / discharge circuit that charges and discharges the battery, and the control circuit controls charge / discharge of the electric power stored in the power storage device and supplies the inverter from only a commercial power source with an amount of power supplied from the power storage device to the inverter input unit. Elevator control device characterized in that ratio to electric energy when supplied to input unit is variable according to time of day  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charging / discharging circuit for charging / discharging the power, and the control circuit controls charging / discharging of the electric power stored in the power storage device and uses only a commercial power source for the amount of power supplied from the power storage device to the inverter input unit. The ratio to the amount of power when supplying to the inverter input unit is set to a time period when the power demand to the power company peaks during the day. Elevator control apparatus characterized by Align Te variable.  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charge / discharge circuit for charging / discharging the battery, and the control circuit controls charge / discharge of the electric power stored in the power storage device and uses only the commercial power source for the amount of power supplied from the power storage device to the inverter input unit. It is characterized by having multiple types of ratio to the amount of electric power when supplying to the inverter input unit according to the yearly climate change. Beta controller.  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charge / discharge circuit for charging / discharging the battery, and the control circuit controls charge / discharge of the electric power stored in the power storage device and uses only the commercial power source for the amount of power supplied from the power storage device to the inverter input unit. Make the ratio to the amount of power to supply to the inverter input section variable according to the power running frequency of the elevator during the day Elevator control apparatus according to claim.  A commercial power supply, a converter that converts the power of the commercial power supply into DC power, an inverter that converts the DC power back into AC power of variable voltage and variable frequency, and a control that operates the motor at a variable speed based on the AC output of the inverter A circuit, a power storage device provided on the DC input side of the inverter and capable of being charged from DC power rectified by the converter or generated power regenerated from the motor to the DC circuit side, and power stored in the power storage device A charge / discharge circuit for charging / discharging the battery, and the control circuit controls charge / discharge of the electric power stored in the power storage device and uses only the commercial power source for the amount of power supplied from the power storage device to the inverter input unit. The ratio to the amount of power to be supplied to the inverter input unit is set according to the power running frequency of the elevator during the day. If the actual situation of Taka line driving frequency is deviated with respect to the assumed time period, an elevator control apparatus characterized by automatically correcting the ratios set above.

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