Permanent magnet brushless motor with separated Hall position transducer and motor stator

Abstract

The invention provides a permanent-magnetic brushless motor, the Hall position sensor and the motor stator of which are separately positioned. The brushless motor of the invention pertains to technical filed of motors, is characterized by being provided with a phase-change sensing device of the Hall position sensor separately positioned with the motor rotor and has the structure that: a permanent-magnetic phase-change rotor and a phase-change Hall position sensor support which is matched with the rotor are arranged; the permanent-magnetic phase-change rotor and the motor permanent-magnetic rotor are connected with each other and synchronized; the Hall position sensor support and the motor stator are fixedly connected; the Hall position senor is fixedly arranged at the phase position the Hall position sensor support, which is opposite to the permanent-magnetic phase-change rotor. The invention is characterized by effectively preventing the damage to the Hall position sensor caused by overheating, thereby greatly reducing the repair rate of the brushless motor, improving working efficiency, causing the repairing to be more convenient, flexible and fast with low cost and having long service life. In addition, the brushless motor of the invention can be applied to various motors.

Description

technical field

[0001] The invention relates to the technical field of electric motors. Background technique

[0002] Because the brushless motor replaces the carbon brush and commutator in the brush motor with the Hall position sensor, it avoids the wear of the carbon brush inside the motor, thus greatly extending the life of the motor. But the current brushless motor also has its fatal weakness, that is, the Hall position sensor is placed inside the motor, and even most of them are placed directly on the stator core, or in the gap between the iron core and the wire package, as shown in the attached picture Figure 13 , 14 shown. Although such a structure is simple, it has great hidden dangers. Since the stator wire pack generates a lot of heat during operation, the heat is directly conducted to the Hall sensor. As a semiconductor integrated circuit, the Hall sensor has a certain limit of temperature resistance (-55~150°C), the temperature of the motor will rise cumulati...

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