CN109104893B - Elevator control device and elevator control method - Google Patents
Elevator control device and elevator control method Download PDFInfo
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- CN109104893B CN109104893B CN201680083523.4A CN201680083523A CN109104893B CN 109104893 B CN109104893 B CN 109104893B CN 201680083523 A CN201680083523 A CN 201680083523A CN 109104893 B CN109104893 B CN 109104893B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Elevator Control (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
The disclosed device is provided with: the controller generates an ineffective current command value by setting a set value for power running, which makes it difficult for an ineffective current to flow in regenerative operation than in power running of the elevator, as a threshold value during power running of the elevator, and generates an ineffective current command value by setting a set value for regenerative operation, which makes it easy for an ineffective current to flow in regenerative operation of the elevator than in power running of the elevator, as a threshold value during regenerative operation of the elevator, when the elevator is in regenerative operation.
Description
Technical Field
The present invention relates to a control device for an elevator and a control method for an elevator, which are used to improve control performance in travel control unique to an elevator in which power operation and regenerative operation are frequently switched.
Background
With the advent of high-speed switching devices typified by SiC (silicon carbide), the switching frequency (switching frequency) of inverters and converters is becoming higher. By increasing the switching frequency of the inverter and the converter to a high frequency, the capacity of an inductor for rectifying the switched current can be reduced. As a result, there is an advantage that the size of the apparatus can be reduced in the control apparatus for an elevator to which such high-speed switching control is applied.
On the other hand, the elevator control device is provided with a short-circuit prevention time Td for preventing short-circuit between devices. Due to the relationship with the stable driving of the inverter and the converter, the short-circuit prevention time Td cannot be shortened in proportion to the high frequency of the switching frequency.
When the short-circuit prevention time Td cannot be reduced, the inverter has a problem in that an excessive output occurs on the power side and an insufficient output occurs on the regeneration side. To solve such a problem, there is a conventional technique including: the powering operation and the regenerative operation are determined based on the command value of the active current component, and the threshold for starting the flow of the reactive current for power factor control is changed (for example, see patent document 1).
With such a configuration, patent document 1 realizes an operation of suppressing an increase in the overhead wire voltage during the regenerative operation and suppressing a decrease in the overhead wire voltage during the power operation.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 4-285472
Disclosure of Invention
Problems to be solved by the invention
However, the prior art has the following problems.
From the following point of view, it is not appropriate to apply the structure of patent document 1 to an inverter that frequently switches power operation and regenerative operation, such as an elevator. That is, in the elevator control apparatus, if the following characteristic of the switching is poor, the desired output improvement performance cannot be obtained, and if the switching is not smooth, the traveling characteristic of the car is impaired, and further improvement in the control performance is required.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator control device and an elevator control method capable of improving the follow-up characteristic of switching between power running and regenerative running and the elevator traveling characteristic.
Means for solving the problems
The elevator control device of the invention comprises: a converter that converts an ac power supplied via a reactor into a dc power and supplies the dc power to a motor of a hoisting machine that drives an elevator; and a controller that controls the power factor by separating an alternating current component of the alternating current power supply into an active current and an inactive current and performs switching of the converter, thereby supplying the direct current power supply corresponding to the target value to the motor, wherein the controller determines whether the elevator is in a power running or a regenerative running, and when an inactive current command value for controlling the inactive current is generated, in the power running, a 1 st threshold value is set so that the inactive current is less likely to flow in the power running than in the regenerative running, thereby generating the inactive current command value, and in the regenerative running, a 2 nd threshold value is set so that the inactive current is more likely to flow in the regenerative running than in the power running, thereby generating the inactive current command value.
A control method of an elevator according to the present invention is applied to a control device of an elevator including a converter and a controller, the controller performing the control, the converter converting an ac power supplied via a reactor into a dc power and supplying the dc power to a motor of a hoisting machine that drives the elevator, the controller controlling a power factor by separating an ac current component of the ac power into an active current and an inactive current and performing switching of the converter, thereby supplying the dc power corresponding to a target value to the motor, the control method of the elevator including: a step 1 of determining whether the elevator is in a power running or a regenerative running; and a 2 nd step of, when generating the reactive current command value for controlling the reactive current, generating the reactive current command value by setting a 1 st threshold value so that the reactive current is less likely to flow during the powering operation than during the regenerative operation, and generating the reactive current command value by setting a 2 nd threshold value so that the reactive current is more likely to flow during the regenerative operation than during the powering operation during the regenerative operation.
Effects of the invention
According to the present invention, the present invention has the following configuration: during one travel from start to stop, the timing of switching between the power running state and the regenerative running state can be determined, and an appropriate reactive current command can be generated in accordance with each running state. As a result, the elevator control device and the elevator control method can improve the switching follow-up characteristic of the power running/regenerative running and the elevator traveling characteristic.
Drawings
Fig. 1 is a circuit configuration diagram of a control device including a PWM converter in embodiment 1 of the present invention.
Fig. 2 is a diagram showing an internal configuration of an idle current reference circuit in embodiment 1 of the present invention.
Fig. 3 is an overall configuration diagram of an elevator system including an elevator control device according to embodiment 1 of the present invention.
Fig. 4 is a diagram showing an effective current command I in travel control performed by the elevator control device according to embodiment 1 of the present inventionPGraph of time variation.
Fig. 5 is a diagram showing a threshold value changing process executed by an idle current control circuit included in a controller of an elevator control device according to embodiment 1 of the present invention.
Fig. 6 is a diagram showing a threshold value changing process different from that in fig. 5 described above, which is executed by an idle current control circuit included in a controller of an elevator control device according to embodiment 1 of the present invention.
Detailed Description
Preferred embodiments of an elevator control device and an elevator control method according to the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a circuit configuration diagram of a control device including a PWM converter in embodiment 1 of the present invention. Although not shown in detail, the PWM converter 1 is composed of a diode bridge circuit connected in antiparallel with the self-extinguishing type switching element, and the AC input side is connected to the AC power supply V via an AC reactor 2ACAnd (4) connecting. A smoothing capacitor 4 and a load 5 are connected in parallel to the dc output side of the PWM converter 1.
Current detection circuitThe line 6 detects the dc voltage V of the PWM converter 1. The voltage control circuit 7 compares the voltage command V with the DC voltage V and outputs an effective current command IPSuch that the deviation is reduced.
The phase detection circuit 9 outputs a phase signal θ according to the voltage of the ac power supplyPS. The current detection circuit 17 IS based on the AC currents IR and IS detected by the current detectors 12R and 12S and the power supply voltage V detected by the phase detection circuit 9ACPhase signal theta ofPSCalculating, separating and outputting an effective current I as an effective component of an alternating currentPAnd a reactive current I as a reactive componentQ。
In addition, in fig. 1, a case where currents of the R phase and the S phase among the three phases are detected by the current detector is exemplified, but the present invention is not limited to such a configuration. The same effect can be obtained by adopting a structure that detects the current of any two or all three of the three phases.
The active current control circuit 14 controls the active current according to the active current command I outputted from the voltage control circuit 7PAnd the effective current I calculated by the current detection circuit 17PThe deviation between the two values is calculated to obtain the effective voltage command e of the PWM converter 1P*. On the other hand, the reactive current control circuit 15 calculates a reactive current command I based on a reactive current reference circuit 18 described laterQAnd an ineffective current I calculated by a current detection circuit 17QThe deviation between the two is calculated, and the invalid voltage instruction e of the PWM converter 1 is calculatedQ*。
In fig. 1, the voltage control circuit 7, the active current control circuit 14, the reactive current control circuit 15, the PWM control circuit 16, and the reactive current reference circuit 18 correspond to the internal configuration of the controller 30 that outputs the switching command SW based on the detection result of each detection circuit.
In the control device of the elevator with the above structure, the present application is providedThe technical feature is that the reactive current instruction I is calculated by the reactive current reference circuit 18QThe method will be described in detail with reference to fig. 2.
Fig. 2 is a diagram showing an internal configuration of the reactive current reference circuit 18 in embodiment 1 of the present invention. The reactive current reference circuit 18 in embodiment 1 is configured to include a threshold determination circuit 18a, a sum-of-squares component calculation circuit 18b, and a power factor control circuit 18 c.
When the effective current is commanded to IPWhen the power factor is not less than 0, that is, when the PWM converter 1 performs the power running for converting the ac power into the dc power, the threshold value determination circuit 18a calculates the threshold value used for the power factor control of the subsequent stage by using the following expression (1), and when the active current command I is givenPThat is, when the PWM converter 1 performs the regenerative operation of inverting the dc power into the ac power, the threshold value used for the power factor control of the subsequent stage is calculated by using the following expression (2).
When I isPWhen ≧ 0, the threshold is Vlim (1)
When I isPWhen 0, the threshold value is Vlim-delta Vd (2)
Where Vlim is a component determined by a voltage limit value that the PWM converter 1 can output. Δ Vd is a correction voltage component of the vertical short circuit prevention time Td, and is calculated, for example, according to the following expression (3).
Δ Vd ═ dc bus voltage [ V ] × vertical short circuit prevention time [ sec ] × switching frequency [ Hz ] (3)
The sum of squares component calculation circuit 18b calculates the effective voltage command ePAnd invalid voltage command eQSum of squares. Then, the power factor control circuit 18c generates the reactive current command I based on the deviation between the threshold value calculated by the threshold value determination circuit 18a and the square sum calculated by the square sum component calculation circuit 18bq*。
As described above, when the comparison is performed using the sum of squares component, the threshold is calculated so that Vlim and Δ Vd have the same dimension as the sum of squares component. In addition, when the square root signal of the sum of squares is used for comparison, the threshold is calculated so that Vlim and Δ Vd have the same dimension as the square root signal.
In general, the Td correction in the PWM converter 1 is converted into a surplus output on the power running side, and functions as an output shortage on the regeneration side. In addition, in order to improve the voltage utilization rate of the PWM converter 1, an idle current flows, and an operation corresponding to so-called field weakening control of the motor is performed.
Here, when the PWM converter 1 is made to be high switching frequency, the ratio of the Td correction voltage becomes high, resulting in a reduction in the voltage utilization rate. Therefore, in the present invention, whether the PWM converter 1 is in the powering operation or the regenerative operation is determined based on the effective current command value or the like, and the power factor control threshold value in consideration of the Td correction voltage is dynamically changed and set based on the determination result.
With such a configuration, the reactive current is less likely to flow on the power side, and the reactive current is more likely to flow on the regeneration side. As a result, the reactive current command I can be generated in accordance with the powering operation and the regenerative operation with higher follow-up accuracy than in the conventional artPAnd the voltage utilization rate of the converter can be improved.
In other words, by using the reactive current reference circuit 18 described with reference to fig. 1 and 2, when the PWM converter is operated at a high switching frequency using a high-speed switching device such as SiC, it is possible to reduce the size of the AC reactor 2 and perform power conversion without deteriorating the voltage use efficiency more than necessary.
Next, a case where the control device for the PWM converter according to embodiment 1 shown in fig. 1 is applied to elevator control will be described in detail below.
Fig. 3 is an overall configuration diagram of an elevator system including an elevator control device according to embodiment 1 of the present invention. Here, the controller 30 in fig. 3 corresponds to the controller 30 for controlling the PWM converter 1 shown in fig. 1. The load 5 in fig. 1 corresponds to a motor of the hoisting machine 31. Hereinafter, the motor of the hoisting machine 31 will be simply referred to as the hoisting machine 31.
The car 35 is connected by a main rope 33, and the main rope 33 is wound around the hoisting machine 31 and connected to a counterweight 34 via a deflector sheave 32. The hoisting machine 31 receives a drive command 39 from the controller 30 to raise and lower the car 35.
The drive command 39 is given from the controller 30, and the drive command 39 is set in the traveling direction so that the car 35 travels to a targeted landing by the passenger operating the landing operating panels 38a to 38c located at the landings 40a to 40c or the in-car operating panel 36 in the car 35.
Further, a weighing device 37 provided in the car or the like detects a load in the car 35 so that whether the movement of the car is power or regeneration can be determined. Then, the controller 30 can determine whether the elevator is started in the power running or the regenerative running according to the traveling direction and the load in the car 35.
The controller 30 sends the power/regeneration determination result to the threshold determination circuit 18a in the reactive current reference circuit 18 shown in fig. 2. That is, at the time of starting, the reactive current reference circuit 18 can know whether the powering operation is started or the regenerative operation is started from the determination result based on the traveling direction and the load in the car 35.
Here, as the operation unique to the elevator, the timing when the power operation and the regenerative operation are switched in one travel occurs. Therefore, even when the elevator control is performed at a high switching frequency, the decrease in the voltage use efficiency can be suppressed by appropriately setting and changing the power factor control threshold value by the reactive current reference circuit 18 at the time of such switching.
Fig. 4 shows an effective current command I in the travel control of an elevator according to embodiment 1 of the present inventionPGraph of time variation. More specifically, fig. 4 shows the temporal changes of the converter current command value in the following two operation modes A, B.
Operation mode A: an operation mode in which the operation is started from the 1 st floor toward the 2 nd floor by the powering operation and the power operation is switched to the regenerative operation when the floor reaches the 2 nd floor
Operation mode B: an operation mode in which the operation mode is started from the 2 nd floor to the 3 rd floor by the regenerative operation and the regenerative operation is switched to the power operation when the floor reaches the 3 rd floor
The control of the controller 30 when the operation mode a or the operation mode B is executed will be described below separately in steps 1 to 3.
< step 1 >: handling at start-up
The controller 30 can determine whether the car is started as the power operation or the regenerative operation based on a combination of the load in the car 35 detected by the weighing device 37 and the traveling direction of the car 35. Specifically, the controller 30 can determine whether to perform the power operation or the regenerative operation by dividing the situation into the following cases 1 to 4.
Case 1: when the load in the car is equal to or greater than the weight of the counterweight 34 and the traveling direction is the ascending direction, it is determined that the power running is performed
Case 2: when the load in the car is lower than the weight of the counterweight 34 and the traveling direction is the ascending direction, it is determined that the regenerative operation is performed
Case 3: when the load in the car is heavier than the counterweight 34 and the traveling direction is the descending direction, it is determined that the regenerative operation is performed
Case 4: when the load in the car is equal to or less than the weight of the counterweight 34 and the traveling direction is the descending direction, it is determined that the power running is performed
< step 2 > traveling control until deceleration starts
After starting the operation until the deceleration for stopping at the target floor is started, the controller 30 generates the reactive current command I using the threshold value corresponding to the powering operation or the regenerative operation determined in step 1QTo perform travel control of the elevator.
< step 3 > traveling control after start of deceleration
The controller 30 switches from the acceleration or constant speed state to the deceleration state, thereby estimating the timing of switching from the power operation to the regenerative operation or the timing of switching from the regenerative operation to the power operation shown in fig. 4. The controller 30 may estimate the timing of the operation state switching based on the information on the operation mode, or may estimate the timing of the operation state switching as described above with reference to fig. 2According to the effective current instruction IPAnd detecting positive and negative values of the values.
Then, the controller 30 generates an appropriate reactive current command by using the above equation (1) in the powering operation and the above equation (2) in the regenerative operation, and switching the threshold value according to the operation state.
Fig. 5 is a diagram showing a threshold value changing process executed by the reactive current control circuit 18 included in the controller 30 of the elevator control device according to embodiment 1 of the present invention. Specifically, the results of the threshold value changing process corresponding to the operation mode A, B shown in fig. 4 are shown.
As shown in fig. 5, during the power running, the controller 30 in embodiment 1 dynamically changes the set threshold value by adding Δ Vd corresponding to the correction voltage component of the vertical short-circuit prevention time Td to Vlim in accordance with the above expression (1). On the other hand, during the regeneration operation, the controller 30 dynamically changes the set threshold value by subtracting Δ Vd from Vlim according to the above expression (2).
As a result, even in an elevator-specific control environment in which polarity change of power exchange occurs at the start of deceleration during primary traveling, appropriate reactive current control can be executed according to the operating state, and good follow-up characteristics can be achieved even at the time of switching between power running and regenerative running.
Fig. 6 is a diagram showing a threshold value changing process different from that shown in fig. 5, which is executed by the reactive current control circuit 18 included in the controller 30 of the elevator control device according to embodiment 1 of the present invention. Specifically, in the threshold value changing process shown in fig. 6, in addition to the process shown in fig. 5, the threshold value is changed to a ramp function or a low-pass filter waveform when the threshold value is switched, thereby further improving the control characteristic.
In this way, by performing the ramp function or the processing by the low-pass filter, the threshold value can be prevented from being stepped at once, and the threshold value change amount per unit time can be limited within the allowable value. As a result, since the threshold value is smoothly switched, it is possible to suppress generation of unpleasant vibration to the car 35, and it is possible to realize smooth car movement.
As described above, according to embodiment 1, it is possible to provide a reactive current control circuit that achieves higher-precision control performance than in the conventional art in the control of an elevator in which power operation and regenerative operation are frequently switched. Namely, the following structure is realized: when the elevator is running, the switching time of power/regeneration operation can be predicted, and an appropriate reactive current command can be generated according to the operation state.
Specifically, at the time of starting, it is determined whether the power operation or the regenerative operation is performed according to the load in the car and the traveling direction. During deceleration, the switching time is predicted based on the information on the operation mode or the value of the effective current command. The present invention is also provided with: at the switching time, when a power factor control threshold value for generating an idle current command is set, the addition/subtraction of the correction amount based on the value of the correction voltage component corresponding to the vertical short-circuit prevention time is switched.
As a result, it is possible to obtain an elevator control device and an elevator control method that can dynamically generate an appropriate reactive current command according to an operation state to perform travel control and improve the follow-up characteristics of power operation/regenerative operation switching and the elevator travel characteristics.
In the above-described embodiments, SiC is given as an example of the high-speed switching device, but other than SiC, gallium nitride based materials and diamond are given as wide band gap semiconductors having a band gap larger than that of silicon.
Such a bridge circuit including a self-extinguishing switching element formed of a wide band gap semiconductor and a diode has high withstand voltage characteristics and high allowable current density. Therefore, the bridge circuit can be miniaturized, and the semiconductor module incorporating the bridge circuit can be miniaturized by using the miniaturized bridge circuit.
Further, since the heat resistance is also high, the heat radiating fins of the heat sink can be miniaturized and the water cooling portion can be air-cooled, and thus the semiconductor module can be further miniaturized.
Further, since the power loss is low, the self-extinguishing switching element and the diode can be made highly efficient, and the semiconductor module can be made highly efficient.
Further, since the switching frequency can be increased, the capacity of the inductor can be reduced, and further miniaturization as a control device for an elevator accompanying the miniaturization of the AC reactor can be achieved.
Further, although it is desirable that both the self-extinguishing switching element and the diode be formed of a wide bandgap semiconductor, either one of the self-extinguishing switching element and the diode may be formed of a wide bandgap semiconductor. In this case, the above-described effects can be obtained.
Claims (8)
1. A control device for an elevator, comprising:
a converter that converts an ac power supplied via a reactor into a dc power and supplies the dc power to a motor of a hoisting machine that drives an elevator; and
a controller that performs switching of the converter while controlling a power factor by separating an alternating current component of the alternating current power supply into an active current and a reactive current, thereby supplying the direct current power supply corresponding to a target value to the motor,
the controller determines whether the elevator is in a power running or a regenerative running, generates an ineffective current command value for controlling the ineffective current, generates the ineffective current command value by setting a 1 st threshold value so that the ineffective current is less likely to flow in the power running than in the regenerative running during the power running, and generates the ineffective current command value by setting a 2 nd threshold value so that the ineffective current is more likely to flow in the regenerative running than in the power running during the regenerative running,
the controller sets the 1 st threshold and the 2 nd threshold in consideration of an upper and lower short circuit prevention time of a switching element in the converter performing the switching.
2. The control device of an elevator according to claim 1,
the controller performs a threshold changing process by limiting the amount of change per unit time so that the amount of change is within an allowable value when switching the threshold for generating the reactive current command value from the 1 st threshold to the 2 nd threshold or when switching the threshold from the 2 nd threshold to the 1 st threshold.
3. The control device of an elevator according to claim 1 or 2,
when the converter is allowed to output a voltage limit value Vlim and a correction voltage component Δ Vd of the vertical short circuit prevention time is Δ Vd which is a direct current bus voltage [ V ] × vertical short circuit prevention time [ sec ] × switching frequency [ Hz ], the controller calculates the 1 st threshold and the 2 nd threshold as the 1 st threshold and the 2 nd threshold
Threshold value of 1 ═ Vlim
The 2 nd threshold value Vlim- Δ Vd,
the reactive current command value is generated.
4. The control device of an elevator according to claim 1 or 2,
the switching elements within the current transformer are formed of wide bandgap semiconductor.
5. The control device of an elevator according to claim 3,
the switching elements within the current transformer are formed of wide bandgap semiconductor.
6. The control device of an elevator according to claim 4,
the wide band gap semiconductor is silicon carbide, a gallium nitride-based material, or diamond.
7. The control device of an elevator according to claim 5,
the wide band gap semiconductor is silicon carbide, a gallium nitride-based material, or diamond.
8. A control method of an elevator, which is applied to a control device of an elevator having a converter and a controller, wherein the controller performs the control of the converter by converting an AC power supplied via a reactor into a DC power and supplying the DC power to a motor of a hoisting machine for driving the elevator, and the controller performs switching of the converter while controlling a power factor by separating an AC component of the AC power into an active current and an inactive current, thereby supplying the DC power corresponding to a target value to the motor,
in the control method of the elevator, comprising:
a step 1 of determining whether the elevator is in a power running or a regenerative running; and
a 2 nd step of, when generating a reactive current command value for controlling the reactive current, generating the reactive current command value by setting a 1 st threshold value so that the reactive current is less likely to flow during the powering operation than during the regenerative operation during the powering operation, and generating the reactive current command value by setting a 2 nd threshold value so that the reactive current is more likely to flow during the regenerative operation than during the powering operation during the regenerative operation,
in the 2 nd step, the 1 st threshold value and the 2 nd threshold value are set in consideration of a vertical short-circuit prevention time of a switching element in the converter performing the switching.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/058992 WO2017163312A1 (en) | 2016-03-22 | 2016-03-22 | Elevator control device and elevator control method |
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| Publication Number | Publication Date |
|---|---|
| CN109104893A CN109104893A (en) | 2018-12-28 |
| CN109104893B true CN109104893B (en) | 2020-06-23 |
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| CN201680083523.4A Active CN109104893B (en) | 2016-03-22 | 2016-03-22 | Elevator control device and elevator control method |
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|---|---|
| JP (1) | JP6611909B2 (en) |
| CN (1) | CN109104893B (en) |
| WO (1) | WO2017163312A1 (en) |
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- 2016-03-22 WO PCT/JP2016/058992 patent/WO2017163312A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109104893A (en) | 2018-12-28 |
| WO2017163312A1 (en) | 2017-09-28 |
| JPWO2017163312A1 (en) | 2018-12-20 |
| JP6611909B2 (en) | 2019-11-27 |
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