Precise drive brushless motor and driver circuit

Abstract

The invention provides a precise drive brushless motor and a driver circuit. Different from a traditional brushless motor which usually adopts position sensors with the same number as the phase number, the precise driving brushless motor and the driver circuit provided by the invention adopt position sensors with the same number as the driving state to accurately sense the magnetic pole position of the rotor so as to realize precise driving. The stator coil of the brushless motor adopts star-shaped connection, and a winding winding mode mainly adopts the fact that a coil of a winding of the same phase is wound between two adjacent tooth grooves of a single armature tooth, so that a rotor rotates the position of the single armature tooth when being driven in each state, then the rotor is driven in the next state, and the rotor is driven to rotate in a driving mode of electrifying the two-phase coil state by state, so that the driving efficiency of electric energy is improved. Different from the traditional mode of changing the duty ratio to adjust the rotating speed in pulse width modulation, the mode of separating rotating speed adjustment and pulse width modulation is adopted, the fixed pulse width with the high duty ratio is adopted, and the rotating speed is adjusted in the mode of changing the rotating speed pulse frequency, so the motor has the characteristics that the rotating speed is in a large range, the large torque is kept, and meanwhile high electric energy driving efficiency is achieved. The precise drive brushless motor and the driver circuit also can be used for a motor wound across the tooth space, and can be widely applied to new-energy electric vehicles.

Description

[0001] The invention discloses precise driving of a brushless motor and a driver circuit, including the brushless motor and the driver circuit of the brushless motor. technical field [0002] The invention relates to the technical field of brushless motors and brushless motor driver circuits. Background technique: [0003] The brushless motor consists of a motor body and a drive circuit, and is a typical mechatronic product. [0004] Brushless motors are widely used in new energy electric vehicles, and its power directly affects the driving capability of electric vehicles. How to increase the power of brushless motors has also become an important factor. Improving the utilization rate of winding coils is an effective way to increase the power of brushless motors. At the same time, in the traditional way of changing the modulation pulse width to realize the change of the speed, when the brushless motor is at a low speed, the motor torque decreases due to the low energy suppl...

AI Technical Summary

Problems solved by technology

At the same time, the traditional method of changing the modulation pulse width to realize the change of the speed causes the torque of the motor to decrease due to the lack of energy supplied when the brushless motor is at a low speed, and the performance at low speeds deteriorates.

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