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Power converter device and elevator using the same

A technology of power conversion device and current conversion, which is applied in the field of suppression control and power conversion device, and can solve problems such as complex calculation and so on.

Inactive Publication Date: 2013-04-10
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even in this case, it is necessary to perform a load test to detect the torque ripple component in advance, and a complicated calculation is required as a ripple correction model.

Method used

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  • Power converter device and elevator using the same
  • Power converter device and elevator using the same
  • Power converter device and elevator using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] figure 1 A power conversion device according to a first embodiment of the present invention and an elevator driven by the power conversion device are shown. The main circuit part of the power conversion device is composed of a power source 1, a rectifier 2 that converts the commercial AC voltage of the power source 1 into a DC voltage, an inverter 3 that converts the voltage converted into a DC by the rectifier 2 into an AC voltage of any frequency, and through an inverter. An electric motor 4 driven by an inverter 3 and a rotary encoder 5 for detecting the rotational speed and magnetic pole position of the electric motor 4 . In addition, the motor 4 is connected to the sheave 11, and the elevator car 13 and the counterweight 14 are suspended in the hoistway (not shown) by the sling 12 wound around the sheave 11 . When the motor 4 is driven by the power conversion device and the sheave 11 is driven to rotate, the sling 12 is driven, and the elevator car 13 and the cou...

Embodiment 2

[0026] Image 6 A power conversion device and an elevator driven by the power conversion device according to a second embodiment of the present invention are shown. The main circuit part of the power conversion device and the structure of the elevator, and figure 1 The first embodiment is the same, but in the control system blocks of the two, the correction unit corresponding to the induced voltage compensation is different. Specifically, in figure 1 In the first embodiment, the phase voltage component of the induced voltage corresponding to the magnetic pole position θ is added to the output of the 2-phase-3-phase conversion block 10, and at Image 6 In the second embodiment, the induced voltage compensation component corresponding to the magnetic pole position θ is added to the output of the rotating coordinate system (system of flux axis and torque axis) on the input side of the 2-phase-3-phase conversion block 10 . Here, the compensation value to be added is the flux ...

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PUM

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Abstract

The invention provides a power converter device for performing torque pulse modification of motor in high frequency section using simple torque modification information, and elevators using the power converter devices. The controlling computation portion for computing in order to control the instruct value of the inverter for motor driving includes a storage unit for storing torque-current conversion gain corresponding to the position of the magnetic pole of the motor, and induction voltage compensation voltage corresponding to the position of the magnetic pole of the motor. Additionally, when the motor is driven, the control computation portion correspondingly reads the torque-current conversion gain and the torque instruct value to compute the current instruct value of the torque shaft according to the detection value from the magnetic pole position of the storage unit and the motor, and modifies voltage instruct values of each phase, or the voltage instruct value of the magnetic flux shaft or the torque shaft according to the induction voltage compensation voltage correspondingly read from the detection value of the magnetic pole position of the storage unit and the motor.

Description

technical field [0001] The present invention relates to a power conversion device and suppression control of torque ripple, torque ripple, and the like in an elevator using the power conversion device. Background technique [0002] In a conventional power conversion device using inverter control, a vector control method is generally used in which a magnetic flux axis (d axis) and a torque axis (q axis) are controlled in a rotating coordinate system. Normally, the induced voltage of the load motor is assumed to be an ideal sine wave, and the induced voltage constant and torque constant are set to constant values ​​for simple control. As a prior art, in the motor control device described in Japanese Patent Application Laid-Open No. 7-46878 (Patent Document 1), the corrected current value corresponding to the torque command, speed information, and the rotational position of the motor is used as Torque error data is stored in memory in advance, and is added to the torque comman...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P21/00H02P27/06B66B9/00B66B1/30B66B1/34H02P21/05H02P21/22H02P23/04H02P23/16H02P27/04
CPCY02B50/144Y02B50/00
Inventor 绫野秀树大沼直人森和久蛭田清玄名仓宽和金子大吾
Owner HITACHI LTD