Method and device for acquiring rotor position of direct-drive ball mill permanent magnet synchronous motor

Abstract

The invention discloses a method for collecting the rotor position of a permanent magnet synchronous motor of a direct-drive type ball mill. The method comprises the steps that 1, a photoelectric detection unit is adopted for converting collected rotor position information into pulse signals to be output; 2, a position signal processing unit is adopted for encoding the pulse signals, and position information encoded signals are output; 3, the position information encoded signals are output to a ball mill controller. The device for collecting the rotor position of the permanent magnet synchronous motor of the direct-drive type ball mill comprises the photoelectric detection unit, the photoelectric detection unit is connected with the position signal processing unit and comprises a photoelectric encoding disc and a photoelectric position detector, and the device is characterized in that an encoding ring corresponding to the photoelectric position detector is arranged on the edge of the photoelectric encoding disc. The device is ingenious and simple in structure and low in cost.

Description

technical field

[0001] The invention relates to the technical field of mine beneficiation equipment control, in particular to a method and a device for collecting the rotor position of a permanent magnet synchronous motor of a direct-drive ball mill. Background technique

[0002] The ball mill is a kind of equipment for crushing materials. The traditional ball mill needs to set up a complicated transmission mechanism, and the motor drives the drum to rotate through the gearbox, open gears, etc. These transmission mechanisms not only occupy a large area, but also have transmission losses, which reduces the efficiency of the ball mill. The above-mentioned shortcomings can be overcome by adopting the direct drive method, where the rotor of the motor drives the drum directly.

[0003] Considering the low speed and large inertia when the ball mill rotates, the permanent magnet synchronous rotating motor is the preferred solution, that is, the permanent magnet poles are installed...

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