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Motor current detection method and system, stirrer and storage medium

A technology of motor current and detection method, which is applied in the direction of measuring current/voltage, measuring device, measuring electric variable, etc., can solve the problem of high cost of current detection, and achieve the effect of saving detection cost and saving the space of the overall structure

Pending Publication Date: 2020-11-24
SHENZHEN TOPBAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a motor current detection method, system, mixer and storage medium, aiming at solving the problem of high current detection cost caused by the current loop in the existing motor current detection process

Method used

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  • Motor current detection method and system, stirrer and storage medium
  • Motor current detection method and system, stirrer and storage medium
  • Motor current detection method and system, stirrer and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0054] see figure 1 , is a flow chart of the motor current detection method provided in the first embodiment of the present invention. In this embodiment, the motor to be tested is electrically connected to a master MCU and a slave MCU respectively, and the slave MCU is connected to the motor to be tested. Provided with a thyristor, the method comprises the steps of:

[0055]Step S10, the main MCU detects the zero point of the motor under test in real time, calculates the delay time according to the current speed and the target speed of the motor under test, and controls the time delay within the delay time. The thyristor is in the cut-off state and starts timing to obtain the timing time;

[0056] Specifically, the main MCU detects the zero-crossing point in each phase of the motor in real time through the zero-crossing detection circuit, and when it is judged that the current zero-crossing point of the motor under test is detected, the timer is triggered to achieve the timi...

Embodiment 2

[0069] see figure 2 , is a flow chart of the motor current detection method provided in the first embodiment of the present invention. In this embodiment, the motor to be tested is electrically connected to a master MCU and a slave MCU respectively, and the slave MCU is connected to the motor to be tested. Provided with a thyristor, the method comprises the steps of:

[0070] Step S11, the main MCU detects the zero point of the motor under test in real time, calculates the delay time according to the current speed and target speed of the motor under test, and controls the time delay within the delay time. The thyristor is in the cut-off state and starts timing to obtain the timing time;

[0071] Step S21, when it is judged that the motor under test is at a zero point, the main MCU sends a shutdown command to the thyristor, and when the thyristor receives the shutdown command, the motor under test is power off;

[0072] Wherein, the shutdown command is used to control and s...

Embodiment 3

[0082] see image 3 , is a flow chart of the motor current detection method provided by the third embodiment of the present invention. In this embodiment, the motor to be tested is electrically connected to a master MCU and a slave MCU respectively, and the slave MCU and the motor to be tested are connected electrically. Provided with a thyristor, the method comprises the steps of:

[0083] Step S12, the main MCU detects the zero point of the motor under test in real time, and starts timing when it is judged that the motor under test crosses the zero point, so as to obtain the timing time;

[0084] Step S22, when it is judged that the motor under test has crossed zero, the main MCU sends a shutdown command to the thyristor, and when the thyristor receives the shutdown command, the motor under test is power off;

[0085] Step S32, when the master MCU judges that the counting time is equal to a time threshold, correspondingly send an excitation signal and an interrupt detectio...

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Abstract

The invention is suitable for the technical field of motor detection, and provides a motor current detection method and system, a stirrer and a storage medium, and the method comprises the steps thata main MCU carries out the zero point detection of a to-be-detected motor in real time so as to calculate the delay time, controls a silicon controlled rectifier to be in a cut-off state in the delaytime, and starts timing; when the main MCU judges that the timing time is equal to the delay time, an excitation signal and an interrupt detection signal are correspondingly sent to the silicon controlled rectifier and the slave MCU; the silicon controlled rectifier performs rotating speed excitation on the to-be-detected motor, the MCU generates event interruption to perform current sampling on the to-be-detected motor, and when the MCU judges that the change slope ratio of the sampling signal is smaller than the preset slope ratio, current sampling is stopped; the slave MCU sends the maximumcurrent estimation value to the main MCU; when the main MCU receives the maximum sampling current estimation value, serial port interruption is generated to obtain current estimation data; and the main MCU filters the current estimation data to obtain an average value. The problem that the detection process is too high due to the fact that a current loop is adopted for current detection is solved.

Description

technical field [0001] The invention belongs to the technical field of motor detection, and in particular relates to a motor current detection method, system, mixer and storage medium. Background technique [0002] Motor control refers to the control of starting, accelerating, running, decelerating and stopping the motor. There are different requirements and purposes according to the type of motor and the application occasion of the motor. For the motor, through the motor control, the purpose of fast start, fast response, high efficiency, high torque output and high overload capacity of the motor can be achieved. In order to complete the control operations of the above-mentioned various links, it is necessary to use external circuits or devices for control. When the external device is controlled, it is necessary to obtain real-time data on the operation of the motor current and voltage, so as to efficiently and reliably control it. Among them, it is a very important parame...

Claims

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Application Information

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IPC IPC(8): G01R19/30
CPCG01R19/30
Inventor 不公告发明人
Owner SHENZHEN TOPBAND
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