On-line asynchronous motor stator resistance measurement method and device of frequency converter special for elevator traction machine

A technology for elevator traction machines and asynchronous motors, applied in measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve problems such as complex software algorithms, influence on stator resistance, and control effect, and achieve high measurement accuracy , the effect of precise resistance

Inactive Publication Date: 2015-01-28
展鹏科技股份有限公司
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Problems solved by technology

Among them, the first measurement scheme, although the system structure is simple, the program is simple, and the efficiency is high, but the change of the motor temperature will affect the actual value of the stator resistance, which will affect the control effect; the second scheme, the resistance value is real-time measurement Yes, although there is no influence of temperature, but the inverter needs to apply additional excitation, which will have a certain impact on the operating efficiency of the inverter, and the software algorithm is relatively complicated

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  • On-line asynchronous motor stator resistance measurement method and device of frequency converter special for elevator traction machine
  • On-line asynchronous motor stator resistance measurement method and device of frequency converter special for elevator traction machine
  • On-line asynchronous motor stator resistance measurement method and device of frequency converter special for elevator traction machine

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0018] see figure 1 As shown, the running sequence of the special frequency converter for elevator traction machine is: excitation time 200-500ms, gate opening time 200ms, running elevator acceleration and deceleration curve does not exceed 60s, elevator arrives in place, gate closing time 200ms, operation ends.

[0019] It can be seen from the operation sequence of the special frequency converter for the elevator traction machine above that the special frequency converter for the elevator traction machine will initially excite the stator of the asynchronous motor within the excitation time, and the excitation time is 2...

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Abstract

The invention discloses an on-line asynchronous motor stator resistance measurement method and device of a frequency converter special for an elevator traction machine. The method comprises the steps of firstly measuring output current and output voltage of the frequency converter special for the elevator traction machine when the frequency converter special for the elevator traction machine conducts initial excitation on an asynchronous motor stator; then performing calculation to obtain resistance of the asynchronous motor stator according to the output current and output voltage. The on-line asynchronous motor stator resistance measurement method and device is simple, practical and high in measurement accuracy.

Description

technical field [0001] The invention relates to a method for stator resistance of an asynchronous motor, in particular to a method for on-line measurement of the stator resistance of an asynchronous motor by a frequency converter dedicated to an elevator traction machine. [0002] The invention also relates to a device for on-line measuring the stator resistance of an asynchronous motor by a special frequency converter for an elevator traction machine. Background technique [0003] In actual use, when a conventional PID controller is used for the stator current of an asynchronous motor, it is necessary to accurately measure the mathematical model of the motor. There are two traditional measurement schemes: one is offline measurement, and then the data is stored in the system; the other is real-time online measurement. Among them, the first measurement scheme, although the system structure is simple, the program is simple, and the efficiency is high, but the change of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
Inventor 钟加镇任晨陶玮新朱琨
Owner 展鹏科技股份有限公司
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