A Hall sensor assembly and a permanent magnet motor with the Hall sensor assembly

Abstract

The invention discloses a Hall sensor assembly and a permanent magnet motor with the Hall sensor assembly, belonging to the manufacturing technology of motors. The Hall sensor assembly comprises a connector, a circuit board and a Hall element, wherein the Hall element is sealed completely, welded on the circuit board and located on a lower end face of the connector; the circuit board is fixed and plastically sealed on a side face of the connector; the connector is connected with a shell of the permanent magnet motor; a permanent magnet is arranged on an end plate; the connector is arranged inside the shell; and the Hall element is opposite to the permanent magnet. In the invention, because the Hall element is sealed completely, the Hall element is not easy to be corroded and is long in the service life; the Hall element is arranged on the connector and far away from a disturbing magnetic field, so that the Hall element can exactly detect the position of a rotor; and in addition, through the connector, the position of the Hall element can be simply adjusted and the Hall element can be taken out for replacement.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing, in particular to a Hall sensor assembly and a permanent magnet motor with the Hall sensor assembly. Background technique [0002] Motor refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. It is mainly composed of stators, rotors and other components. Among them, the motor that uses permanent magnets (permanent magnet steel) as the magnetic pole is called a permanent magnet motor. To control a permanent magnet motor, it is usually necessary to detect the rotor pole position. The most common method is to install a Hall element in the teeth or slots of the stator core to directly sense the change of the magnetic field polarity of the rotor pole, and convert it into an electrical signal and send it to the motor control device. [0003] However, this method has the following disadvantages: ...

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Problems solved by technology

[0004] 1. The installation position cannot be adjusted and is easily interfered by the stator magnetic field: Since the Hall element is installed in the tooth or slot, its position cannot be adjusted according to the motor characteristics or control requirements, and the magnetic field generated after the stator winding is energized will interfere with the Hall element's impact on the rotor. Magnetic field detection;

[0005] 2. Susceptible to environmental corrosion and inconvenient to replace: Since the Hall element cannot be completely sealed, the element pins are easy to rust in a humid environment

After damage, the motor needs to be disassembled to be replaced, which is almost impossible to do at the site where the motor is used

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