Electric tool machine and its control method using motor current trajectory for monitoring

Abstract

The invention discloses an electric tool machine and a control method thereof which utilize motor current traces for monitoring and control. A microprocessor is electrically connected to a motor through a drive unit and a current detection and conversion module respectively, and the microprocessor receives An AC synchronous signal, and according to the AC synchronous signal, a first control signal is sent to the drive unit to drive the motor, the current detection and conversion module detects the motor current and converts the output to the microprocessor, and then the The microprocessor takes the AC synchronous signal to measure a current value per unit time, and converts it into a corresponding pressure value, and sends a second control signal to the drive unit according to the pressure value to control the operating state of the motor; The current trajectory formed by detecting the current per unit time achieves the purpose of monitoring the load and protecting the motor.

Description

technical field [0001] The invention relates to an electric tool machine and a control method thereof, in particular to an electric tool machine and a control method thereof for monitoring by using a motor current trace. Background technique [0002] Generally, electric power tools use motors as the main driving core to generate kinetic energy, and the output specifications of hydraulic tools are usually calculated by pressure values, and most of the pressure value setting methods in the prior art use mechanical pressure relief control or Pressure sensor, but in the consideration of improving reliability, the use of pressure sensor is better than mechanical pressure relief control. [0003] For example, No. M435520 "Electric Oil Pressure Tool Detection Device" (hereinafter referred to as the previous case) of Taiwan's new patent case, it is provided with a microcomputer processor, a pressure sensor, a temperature sensor, a battery level sensing circuit, a LED lights and a b...

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Problems solved by technology

[0004] It can be seen from the above that in order to improve the reliability considerations in the prior art, a pressure sensor is added. As in the previous case, a pressure sensor is also added in order to improve reliability and prevent damage, but the addition of a pressure sensor makes the motor The design and space utilization of machine tools are becoming more difficult and the manufacturing cost is increasing. For manufacturers, the miniaturization and cost of electric machine tools are important issues. Therefore, how to solve the problems of space and cost in the existing technology remains to be seen. The need to further develop better solutions

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