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Elevator control device

An elevator control device and voltage technology, which is applied in the field of elevator control devices, can solve the problems of increased burden on driving equipment, slow speed, and inability to fully utilize the ability of driving equipment, etc., to improve precision, avoid voltage saturation, and stabilize elevator drive control at high speed Effect

Active Publication Date: 2010-06-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in an elevator control device that uses a scale device or the like to detect the car load and 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
[0006] 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] figure 1 It is a block diagram showing the configuration of the elevator control device according to Embodiment 1 of the present invention. figure 1 The elevator control device shown 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; The capacitor 3 is composed of a regenerative resistor 4 and a regenerative switch 5 connected in parallel; 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 device drives An electric motor 8 lifts and lowers 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.

[0021] and, figure 1 The elevator control device shown has: a current detector 7, which detects the current supplied from the inverter 6 to the mot...

Embodiment approach 2

[0040] Figure 4 It is a block diagram showing the configuration of an elevator control device according to Embodiment 2 of the present invention. exist Figure 4 In the structure of Embodiment 2 shown, with figure 1 The parts that are the same as those in Embodiment 1 shown are given the same symbols, and descriptions thereof are omitted. in the Figure 4 in, for figure 1 The structure of Embodiment 1 shown further includes: a bus voltage detection unit 26, which measures the DC voltage smoothed by the smoothing capacitor 3; The voltage applied to the motor 8 is calculated; the speed pattern generation unit 15 changes the speed pattern of the motor 8 based on the output of the voltage calculation unit 27 .

[0041] That is, the output of the voltage operation unit 27 is combined with the speed pattern generation unit 15 image 3 Compared with the threshold values ​​shown, the same effect as that of Embodiment 1 is obtained. Even when the bus voltage fluctuates due to th...

Embodiment approach 3

[0044] Figure 5 It is a block diagram showing the configuration of an elevator control device according to Embodiment 3 of the present invention. exist Figure 5 In the structure of Embodiment 3 shown, with figure 1 The parts that are the same as those in Embodiment 1 shown are given the same symbols, and descriptions thereof are omitted. in the Figure 5 in, for figure 1 In the structure of Embodiment 1 shown, a target floor setting unit 28 is also provided in the preceding stage of the speed pattern generating unit 15, and the target floor setting unit 28 generates an instruction to move the elevator from the current floor to the target floor. The generating unit 15 changes the acceleration magnitude of the velocity pattern generated based on the moving distance to the target layer set by the target layer setting unit 28 .

[0045] That is, the target layer setting unit 28 performs the following actions according to its moving distance: Figure 6 As shown, for example...

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Abstract

The invention relates to an elevator control device which uses a high-efficiency speed graph to carry out car operation, instead of using a load detection unit of a scale device and the like. The elevator control device is provided with a current detector, a speed detector, a speed graph generation unit, a motor speed control device, a motor current control device and a voltage operation unit, wherein the current detector is used for detecting current supplied to a motor from an inverter; the speed detector is used for detecting the rotating speed of the motor; the speed graph generation unit is used for generating the speed graph of an elevator; the motor speed control device is used for speed control, so that a speed detection value from the speed detector runs after a speed instruction value from the speed graph of the speed graph generation unit; the motor current control device uses a current detection value and the speed detection value to control the current supplied to the motor from the inverter according to the speed instruction value; the voltage operation unit is used for operating the voltage applied to the motor according to the current detection value and the speed detection value; and the speed graph generation unit modifies the speed graph of the motor according to the output of the voltage operation unit.

Description

[0001] This application is a divisional application of the original patent application number 200580030514.0 (international application number: PCT / JP2005 / 020828, filing date: November 14, 2005, invention name: elevator control device). technical field [0002] The present invention relates to an elevator control device which makes the running speed of a car variable. Background technique [0003] 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 ad...

Claims

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Application Information

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IPC IPC(8): B66B1/30
Inventor 上田隆美酒井雅也柴田益诚
Owner MITSUBISHI ELECTRIC CORP
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