A motor hall zero point adjustment device and its adjustment method

Abstract

The invention discloses a motor Hall zero point adjustment device and a method thereof. The adjustment device includes a power supply, an adjusted motor, a load motor, a load, and a Hall sensor. The power supply, the adjusted motor, the load motor, and the load are connected in sequence. , the Hall sensor is set on the regulated motor, the power supply provides the electric energy required for the regulated motor to rotate, a coupling is set between the regulated motor and the load motor, and the regulated The regulating motor drives the load motor to rotate and generate electricity, and the load is connected to the load motor to consume the electric energy generated by the load motor. Accurately adjust the hall sensor and monitor the input current of the regulated motor. The position of the zero point of the Hall sensor is judged, the working efficiency of the motor is improved, and the performance of the motor is guaranteed.

Description

technical field [0001] The invention relates to a device and a method for adjusting a DC brushless motor, in particular to a device and a method for adjusting a Hall zero point of a DC brushless motor. Background technique [0002] Brushless DC motors generally use sensors to feedback the rotor pole position to facilitate electronic commutation. Brushless DC motors usually use Hall sensors as position sensors. According to the different magnetic circuit structures of the motor, Hall sensors usually have two placements: Method: One is the built-in Hall structure of the stator teeth. The stator teeth at a specific position are left with a Hall slot with a certain axial length, and then three Halls are placed in it, and the motor is induced by three Hall sensors. The change of the rotor magnetic field is used to determine the position of the rotor magnetic poles, and then to determine the commutation time of each phase; the other is to install three Hall sensors on the PCB boar...

AI Technical Summary

Problems solved by technology

Due to the armature reaction, the zero-crossing point of the synthetic air-gap magnetic field under load is ahead of the zero-crossing point of the no-load air-gap magnetic field by an angle, and the size of this leading angle increases with the increase of the load current, and the armature The reaction makes the optimal commutation point move forward, so that the commutation position determined by the symmetrical magnetic field at no-load is no longer suitable for load operation. If the phase shift of the detected back EMF relative to the no-load back EMF is too large and the control circuit does not Taking phase-shifting measures will affect the output and control performance of the motor. Under the condition of maximum load, the efficiency will be low and the temperature rise will be accelerated, which will affect the system performance.

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