Position-sensor-free control method for transformer substation patrol robot
A sensor control and robot technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem of increasing system hardware cost and maintenance cost, increasing the space size and volume of the motor, reducing power density, etc. problem, to increase hardware cost and maintenance cost, increase space size and volume, and reduce power density
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[0018] The present invention will be further explained below in conjunction with the drawings.
[0019] A position sensorless control method for substation inspection robots. Before the robot starts, two voltage pulses are applied to the motor, and the action time of the two voltage pulses is T 1 And T 2 At this stage, the robot is required not to shake due to the injection of voltage pulses, so T 1 , T 2 Are less than the motor time constant; use current sensor to detect T 1 And T 2 The current change rate △i corresponding to the motor in the X-Y axis coordinate system at the moment x1 / T 1 , △i y1 / T 1 , △i x1 / T 2 And △i y1 / T 2 , And then based on these four rates of change and the known voltage vector L 11 , L 12 , L 21 And L 22 , Through calculation, the inductance value that forms a function relationship with the rotor position is obtained, and finally the initial position angle is preliminarily derived based on the inductance value.
[0020] The mathematical model of the robo...
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