Load detection method for pump and wind motors

The invention discloses a load detection method for pump and wind motors, and the method comprises the steps: obtaining the torque current and speed of a motor when the motor is in a steady state; a first proportional constant is calculated, when the first proportional constant is smaller than or equal to a preset first threshold value, the motor is in an empty load state, and when the first proportional constant is larger than the preset first threshold value, the motor is in a non-empty load state. According to the load detection method for the pump motor and the wind motor, the load states of the motors are detected in two modes, the load states of the motors are judged by comparing the proportional constants with the preset threshold values, sensor equipment does not need to be additionally installed, the cost and the installation complexity are reduced, and the detection efficiency is improved. Meanwhile, the load state can be accurately detected, the state misjudgment phenomenon under different working