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Driver, frequency converter, and calibration method and control method of output current

A calibration method and driver technology, applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the problems of limited application occasions, large external equipment, and inability to correct in time, and achieve the effect of reducing control costs.

Active Publication Date: 2019-09-20
HANGZHOU OPTIMAX TECH
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Problems solved by technology

[0003] The traditional method is to calibrate the current sampling of the driver through an external current detection device when the driver leaves the factory, but the usual external devices have problems such as large size and high cost, which are inconvenient to use and cannot be calibrated in time, and the application occasions are limited.

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  • Driver, frequency converter, and calibration method and control method of output current
  • Driver, frequency converter, and calibration method and control method of output current
  • Driver, frequency converter, and calibration method and control method of output current

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[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0058] refer to figure 1 , in one of the embodiments, a driver calibration method is provided, the driver includes multiple outputs and an internal sampling circuit for collecting the output current of each channel, the calibration method includes:

[0059] Use the internal sampling circuit to obtain the real-time current of each channel under the load status;

[0060] Use the real-time current of each channel to get the real-time proportional parameter;

[0061] Calculate the theoretical current of each channel according to the driving voltage loaded on each channel whe...

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Abstract

The application provides a driver, a frequency converter, and a calibration method and control method of an output current. The calibration method includes: acquiring real-time currents of all paths in an access load state by using an internal sampling circuit; acquiring a real-time proportional parameter based on the real-time currents of all paths; calculating all paths of theoretical currents according to driving voltages loaded on all paths during the real-time current acquiring process; acquiring a theoretical proportional parameter based on the theoretical currents of all paths; and acquiring a correction factor based on the offset between the real-time proportional parameter and the theoretical proportional parameter. The correction factor is used for correcting the real-time current collected in the driver working process. According to the calibration method, calibration of the output current can be completed without using an external current detecting device, so that the control cost is lowered.

Description

technical field [0001] The present application relates to the technical field of electrical control, in particular to a calibration method and a control method for a driver, a frequency converter and its output current. Background technique [0002] The driver is a common electrical control drive device, and usually the driver has a current sampling circuit. Due to the difference of devices, the current sampling circuit cannot be completely consistent, and the current sampling consistency of the driver directly affects the accuracy and driving performance of the driver's control current, so it is very important to improve the consistency of current sampling. [0003] The traditional method is to calibrate the current sampling of the driver through an external current detection device when the driver leaves the factory, but the usual external devices have problems such as large size and high cost, are inconvenient to use, cannot be calibrated in time, and are limited in appli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R35/02
CPCG01R35/005G01R35/02
Inventor 赵银波邵占丰黄其福
Owner HANGZHOU OPTIMAX TECH
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