Motor starting method and device

A motor starting and current technology, applied to starting devices, motor generators/starters, electronic commutators, etc., can solve the problems that the actual speed cannot keep up with the command speed, the failure of the motor to start, and large errors

Inactive Publication Date: 2019-06-21
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the asynchronous drag ends, there is a certain error between the actual position and speed of the motor and the theoretical value of the control command. For example, the actual speed cannot keep up with the command speed. When the motor load is relatively large, this error will Larger, often causes the motor to fail to start

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  • Motor starting method and device

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Embodiment Construction

[0071] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0072] Such as figure 1 As shown, the embodiment of the present invention provides a method for starting a motor, and the method may include the following steps:

[0073] Step 101: When the start command of the motor is received, enter the preset positioning acceleration time period, according to the current positioning command carrying the positioning...

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Abstract

The invention provides a motor starting method and device. The motor starting method comprises the following steps: a positioning acceleration time period: according to a current positioning instruction carrying a positioning current value and a motor positioning instruction carrying a frequency value, respectively inputting current to a q axis and a d axis of a motor; an asynchronous dragging time period: maintaining the input current of the q axis and the input current of the d axis, and asynchronously dragging the motor to rotate according to preset rotating direction and stepped cycle command frequency; when running frequency of the motor reaches asynchronous dragging target frequency, calculating a position estimation angle of the motor in a position estimation manner; judging whetherthe position estimation angle is within an adjustable angle interval, if so, controlling the motor to enter a position sensor free speed closed loop transition phase and a position sensor free closedloop control phase in sequence; otherwise, continuing to asynchronously drag the motor to rotate. By adoption of the scheme provided by the invention, the motor can be normally started in the case ofhigh load.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method and device for starting a motor. Background technique [0002] The motor starting process is generally divided into positioning stage, asynchronous dragging stage, asynchronous dragging to non-position sensor speed closed-loop transition switching stage and non-position sensor speed closed-loop control state. Among them, in the prior art, in the positioning stage and the asynchronous dragging stage, the speed loop is generally open-loop control, that is, control commands such as motor drag frequency commands are input to the motor, and the motor operates according to the control commands by default. However, after the asynchronous drag ends, there is a certain error between the actual position and speed of the motor and the theoretical value of the control command. For example, the actual speed cannot keep up with the command speed. When the motor load is relativel...

Claims

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Application Information

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IPC IPC(8): H02P6/20H02P6/18H02P1/16
Inventor 王声纲潘军王璠杨正朱绯任艳华唐婷婷
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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