Low-speed large-torque motor control method

Abstract

The invention discloses a motor control method, and particularly relates to a low-speed large-torque motor control method, which comprises a motor, a sampling ring, an angle sensor, an encoder assembly and a shell, wherein the sampling ring is installed on the motor shaft of the motor, the angle sensor is installed at the position, right opposite to the sampling ring, of the end of the motor, theangle sensor is connected with the encoder assembly, the shell is tightly connected with the motor, the angle sensor and the encoder assembly are installed on the shell, and the angle sensor is installed on the inner wall of the shell. According to the invention, the defects that a traditional brushless motor is not prone to large-range speed regulation, not high in torque control precision and incapable of controlling low-speed large-torque output are overcome; compared with a traditional servo control scheme, the control method has the advantages that the control method is simpler, more costis saved and the like; stable rotating speed output can be obtained even if the load changes greatly at a low speed, so that operation requirements are completely met; and by accurately controlling the q-axis output current, the torque during motor stalling can also be accurately controlled.

Description

technical field [0001] The invention relates to the field of surgery, in particular to a method for controlling a low-speed high-torque motor. Background technique [0002] The high-speed motors on dental implants are mainly designed for high-speed applications. It is difficult to control when running at low speeds, but the implanter has requirements for large output torque and stable speed when running at low speeds. [0003] Using the traditional Hall three-phase six-step method to control the motor, although it can meet the high-speed drilling operation, but in the low-speed tapping mode, due to the insufficient position accuracy, the position feedback cycle cannot meet the control requirements and cannot be accurately obtained. The instantaneous speed of the motor and the position of the rotor cause the output speed to fluctuate greatly when the load changes greatly. Contents of the invention [0004] The purpose of the present invention is to provide a low-speed high...

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Problems solved by technology

[0003] Using the traditional Hall three-phase six-step method to control the motor, although it can meet the high-speed drilling operation, but in the low-speed tapping mode, due to the insufficient position accuracy, the position feedback cycle cannot meet the control requirements and cannot be accurately obtained. The instantaneous speed of the motor and the position of the rotor cause the output speed to fluctuate greatly when the load changes greatly

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