Motor torque control method, motor torque controller, motor torque control system and operation machine

Abstract

The invention provides a motor torque control method, a motor torque controller, a motor torque control system and an operation machine, and belongs to the technical field of engineering machinery, and the method comprises the following steps: determining a maximum torque value at a current rotating speed according to an input end power supply parameter, a cooling system parameter and the current rotating speed; determining a torque permission value of the motor based on the maximum torque value and a system temperature adjustment coefficient; and determining a torque limit value based on the torque permission value and a torque set value, and controlling operation of the motor based on the torque limit value. Therefore, the torque limit value is determined based on the input end power supply parameter, the cooling system parameter, the current rotating speed and the temperature adjustment coefficient, so that the torque limit value is adjusted based on the current state of the system, the motor is protected in advance, and the risks of over-temperature failure of motor protection and motor performance reduction are reduced.

Description

technical field [0001] The present application relates to the field of engineering machinery, in particular to a motor torque control method and its controller, control system and operating machinery. Background technique [0002] At present, when setting the motor protection mechanism of cranes and other operating machinery, the temperature is generally used as the limiting parameter. When the motor temperature exceeds the set temperature, the motor is controlled to enter the motor protection mode. This method does not take into account the real-time status of the whole machine during the electrification operation of the work machine, and only triggers the protection mechanism when the temperature of the motor reaches the upper limit. When the number of triggers is too high, the motor will fail or the performance will be reduced due to overheating. Even if some working machinery motor protection mechanisms use the motor torque as a reference value, they do not take into acc...

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Problems solved by technology

[0003] In view of this, the present application provides a motor torque control method and its system, storage medium and electronic equipment, which solves the problem that the prior art does not set the motor protection mechanism according to the system state of the working machine, resulting in over-temperature failure or performance degradation technical issues

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