High-speed Hall-free three-phase vacuum cleaner motor

Abstract

The invention discloses a high-speed Hall-free three-phase vacuum cleaner motor. The motor possesses a Hall-free sensor circuit which is aired and cooled by the motor. A rotating speed of the motor controlled by the Hall-free sensor circuit is greater than 80000r / min. The motor of the invention adopts a Hall-free and motor air-out cooling circuit board structure. The structure is simple, an appearance is beautiful and reliability is high. Simultaneously, a commutation frequency of an electronic component is reduced so that commutation losses of the electronic component are decreased. A stator structure is simple, winding is convenient and production efficiency is increased. Advantages that a rotating speed is high; the size is small; performance is high; carrying is convenient; energy saving is achieved, the service life is long and so on are possessed. The motor is applied to a vacuum cleaner so that ultrahigh dust collection performance can be acquired.

Description

technical field [0001] The invention relates to a high-speed hallless three-phase vacuum cleaner motor. Background technique [0002] At present, vacuum cleaners have entered thousands of households, and more and more Chinese families are using vacuum cleaners. Conventional vacuum cleaner motors are generally divided into series-excited vacuum cleaner motors and small DC vacuum cleaner motors. Brush motors are often used, with a speed of 20,000-40,000 rpm. Minutes; however, brushed motors are large in size, low in performance, inconvenient to carry, limited in scope of use, and short in life, while brushless motors require higher hardware and circuit control to achieve, and most of them use Hall to detect The magnetic position is used to realize the magnetic field oriented control. The Hall element often has the following problems in use: 1. The price is high, and it is not easy for customers to accept; 2. It is difficult to install. If it is installed improperly, it is easy...

AI Technical Summary

Problems solved by technology

[0002] At present, vacuum cleaners have entered thousands of households, and more and more Chinese families are using vacuum cleaners. Conventional vacuum cleaner motors are generally divided into series-excited vacuum cleaner motors and small DC vacuum cleaner motors. Brush motors are often used, with a speed of 20,000-40,000 rpm. Minutes; however, brushed motors are large in size, low in performance, inconvenient to carry, limited in scope of use, and short in life, while brushless motors require higher hardware and circuit control to achieve, and most of them use Hall to detect The magnetic position is used to realize the magnetic field oriented control. The Hall element often has the following problems in use: 1. The price is high, and it is not easy for customers to accept; 2. It is difficult to install. If it is installed improperly, it is easy to damage the Hall and cause failure or poor startup; 3. 1. The interface and connection between the motor and the control system are increased, which is easy to introduce interference and reduce reliability; 4. The use environment is demanding, and it is extremely vulnerable to high temperature, high humidity, high vibration, dust or harmful chemicals. Damage; 5. The volume of the motor is increased, and the space requirements for the motor are strict

Based on the above shortcomings, the industry also adopts Hall-free technology to replace the structure with Hall. However, due to the difficulty of Hall-free technology, the speed of Hall-free motors currently on the market is not high, usually lower than 40,000 rpm. Minutes, and the commutation times are many, the commutation loss is large, the stator structure is complex, and it is not easy to wind

[0003] Moreover, most of the circuit boards of brushless motors on the market currently have two cooling methods, one is to use large heat sinks for cooling; the other is to use cooling fan blades to cool the circuit boards, both cooling methods are suitable for brushless motor The structure has more restrictions and the cost is higher

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