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Elevator controller

A technology of an elevator control device and a speed control device, which is applied in the field of elevator control devices, can solve problems such as slow speed, increased burden on driving equipment, and inability to fully utilize the capacity of driving equipment, and achieves the effect of avoiding voltage saturation

Active Publication Date: 2007-12-05
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in an elevator control device that uses a scale device or the like to detect the car load to change the speed pattern, there is a problem that, when the detection error of the scale device or the loss during operation is large, the motor, inverter, etc. The burden on the drive equipment increases
[0005] In addition, there is a problem that when the calculation of the speed graph is performed with the error or loss of the scale device estimated in advance, it becomes conservative when the error or loss is small, and the speed is slower than the original speed. operation, as a result, the ability to drive equipment cannot be fully utilized

Method used

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Embodiment approach 1

[0022] Fig. 1 is a block diagram showing the configuration of an elevator control device according to Embodiment 1 of the present invention. The elevator control device shown in FIG. 1 has: an inverter 2, which converts the alternating current from the alternating current power source 1 into direct current; a smoothing capacitor 3, which smoothes the direct current output from the inverter 2; A regenerative resistor 4 and a regenerative switch 5 connected in parallel with the smoothing capacitor 3 constitute; and an inverter 6 that converts the DC output of the converter 2 smoothed by the smoothing capacitor 3 into an AC to provide to the motor 8; the elevator control The device drives a motor 8 to raise and lower a car 12 connected to the other end of a rope 11 to which a counterweight 13 is connected via a pulley 10 at one end.

[0023] And, the elevator control device shown in FIG. 1 has: a current detector 7, which detects the current supplied to the motor 8 from the inver...

Embodiment approach 2

[0042] Fig. 4 is a block diagram showing the configuration of an elevator control device according to Embodiment 2 of the present invention. In the configuration of Embodiment 2 shown in FIG. 4 , the same parts as those of Embodiment 1 shown in FIG. 1 are denoted by the same symbols, and description thereof will be omitted. In this FIG. 4 , for the structure of Embodiment 1 shown in FIG. 1 , it further includes: a bus voltage measurement unit 26 that measures the DC voltage smoothed by the smoothing capacitor 3 ; and a voltage calculation unit 27 that detects The output signal of the unit 26 and the duty ratio calculate the voltage applied to the motor 8 ; the speed pattern generation unit 15 changes the speed pattern of the motor 8 based on the output of the voltage calculation unit 27 .

[0043] That is, by using the speed pattern generation unit 15 to compare the output of the voltage calculation unit 27 with the threshold value shown in FIG. , the voltage applied to the m...

Embodiment approach 3

[0046] Fig. 5 is a block diagram showing the configuration of an elevator control device according to Embodiment 3 of the present invention. In the configuration of Embodiment 3 shown in FIG. 5 , the same parts as those of Embodiment 1 shown in FIG. 1 are denoted by the same symbols, and description thereof will be omitted. In this FIG. 5 , for the structure of Embodiment 1 shown in FIG. 1 , a target floor setting unit 28 is provided in the preceding stage of the speed pattern generating unit 15 , and the target floor setting unit 28 generates In response to an instruction to move to the target layer, the speed pattern generation unit 15 changes the acceleration magnitude of the speed pattern generated based on the moving distance to the target layer set by the target layer setting unit 28 .

[0047] That is, the target layer setting unit 28 performs the following actions according to its moving distance: as shown in FIG. For long-distance movement other than this, select low...

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Abstract

Provided is an elevator control device which drives a cage in a high-efficient speed pattern without using load detecting means such as a conventional scale device. The elevator control device includes: a current detector for detecting a current that is supplied to a motor from an inverter; a speed detector for detecting a rotation speed of the motor; speed pattern generating means for generating an elevator speed pattern; a motor speed control device for controlling the speed so that a speed detection value follows a speed command value of the speed pattern; and a motor current control device for controlling a current that is supplied to the motor with respect to the inverter by using a current detection value and the speed detection value on the basis of the speed command value, and in the elevator control device, the motor current control device has duty detecting means for detecting a duty that is a ratio of an on-time of the inverter within a given sampling period, and the speed pattern generating means changes the speed pattern of the motor on the basis of a duty detection value that is detected by the duty detecting means.

Description

technical field [0001] The present invention relates to an elevator control device which makes the running speed of a car variable. Background technique [0002] Conventionally, an elevator control device has been developed that adjusts the acceleration / deceleration and the maximum speed by changing the speed pattern given to the motor according to the load of the car. In this kind of elevator control device, there is a control device that controls the operation of the car according to the speed set in advance corresponding to the car load detected by the scale device, or the speed calculated based on the car load. A control device that detects the load applied to the motor based on the current flowing into the motor during operation and adjusts the speed. For example, there is an elevator control device that has a unit that detects the car load and changes the speed pattern according to the car load and travel distance to adjust the acceleration and deceleration and the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/30
CPCB66B1/285B66B1/308
Inventor 上田隆美酒井雅也柴田益诚
Owner MITSUBISHI ELECTRIC CORP
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