Motor overload protection method and device, electronic equipment, storage medium and product

Abstract

The invention provides a motor overload protection method and device, electronic equipment, a storage medium and a product, and the method comprises the steps: obtaining the real-time three-phase winding current of a motor, and obtaining a model current parameter of a test through a quadratic sum algorithm. And based on the temperature rise algorithm model, executing the following algorithm processing to obtain a temperature rise calculation result of the test: obtaining an accumulated parameter of the test according to the model current parameter. And the temperature rise calculation result of the test is obtained by calculating the sum of the accumulated parameter of the test and the temperature rise calculation result of the previous test. And if the temperature rise calculation result of the test reaches a preset boundary condition, motor overload protection processing is executed. The motor current is calculated in real time through a temperature rise algorithm model based on a heat balance formula, a temperature rise calculation result is obtained, a motor current parameter is converted into a temperature rise parameter, an alarm is accurately given for abnormal overload of the motor, and overload protection of the motor is achieved.

Description

technical field [0001] The present application relates to the field of motor control, and in particular to a motor overload protection method, device, electronic equipment, storage medium and product. Background technique [0002] At present, in the field of motor control, the controller generally sets an overload factor (2 to 3) according to the rated current of the motor to stabilize the output current of the motor within a safe range. Specifically, the controller obtains the output current of the motor According to the size of the output current and the overload current threshold, if it reaches the current threshold for a certain period of time, the alarm will be over-current, so as to protect the motor from burning due to long-term high-current heating. For example, if it is currently detected that the winding current reaches the set overload threshold, the count will be accumulated, otherwise the count will be decremented, and if the count reaches the set alarm value, a...

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Problems solved by technology

[0003] However, there is a problem with this method, that is, using the current sensor to obtain the current motor winding coil current and compare it with the set safety threshold, and the method of reporting overload after exceeding the threshold for a certain period of time solves the safety protection problem of loads under general working conditions, but for special When industrial sewing machines have frequent and large load changes on the main shaft, false alarms or missed alarms will occur if the alarm threshold is not selected properly. can reach more than 8 times the rated current), the protection threshold setting is too small to deal with the scene of industrial sewing machine motor ultra-high overload current, resulting in false alarms; on the contrary, if the setting is too high, it cannot solve the problem of medium and low overload current. situation, resulting in underreporting

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