Multi-functional iron-core-free direct-current brushless motor drive circuit

Abstract

The invention discloses a multi-functional iron-core-free direct-current brushless motor drive circuit, and relates to the technical field of motor driving. The multi-functional iron-core-free direct-current brushless motor drive circuit comprises an SPWM (Sinusoidal Pulse Width Modulation) main control module, wherein the SPWM main control module is connected with a position detection module, a protection module, a speed regulating module and a driving module respectively; the driving module is connected with a motor through an electric wire; and a motor wire is connected with the position detection module and the protection module respectively through electric wires. The multi-functional iron-core-free direct-current brushless motor drive circuit not only achieves the practical purpose in multi-function, high performance and low cost, but also has the following functions: (1) Hall sensor and non-Hall sensor working modes can be optionally selected; (2) rotation blocking protection function; (3) large torsion ultra-low-speed constant driving function; (4) output of a rotating speed signal for high-end application; (5) a motor reserving function; (6) a slow start function; (7) a constant current drive function; (8) a linear stepless speed regulation function.

Description

technical field [0001] The invention relates to the technical field of motor drive, in particular to a multifunctional iron-coreless DC brushless motor drive circuit. Background technique [0002] The iron-core brushless DC motor is a new type of special motor that has emerged in recent years. First, it adopts the axial magnetic field structure design, which greatly improves the power density and torque volume ratio. The second is to adopt a new winding process, high-pressure precision die-casting and polymer materials to effectively reduce the copper loss of the winding. The third is that silicon steel sheet is not used as the core material of the stator and rotor, which eliminates magnetic damping and iron loss, reduces the driving power, and reduces the heat source of iron loss. It is a high-efficiency and energy-saving motor. It is widely used in industrial general-purpose equipment such as fans, water pumps, compressors, etc. It is especially suitable for electric bicy...

AI Technical Summary

Problems solved by technology

[0003] At present, there are fewer types of motor drive circuits for iron-core brushless DC motors, and there are problems such as few functions, poor performance, and high cost. In particular, the existing drives cannot flexibly choose to use Hall sensors or not The drive circuit of the Hall sensor, so a multi-functional iron-less DC brushless motor drive circuit is needed

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