High Speed ​​Hallless Three Phase Vacuum Cleaner Motor

Abstract

The invention discloses a high-speed Hallless three-phase vacuum cleaner motor, which has a Hallless sensor circuit cooled by the motor's air outlet, and the speed of the motor controlled by the Hallless sensor circuit is greater than 80,000 revolutions per minute. The invention adopts the circuit board structure without Hall and motor air outlet, which has simple structure, beautiful appearance and high reliability. Simple, convenient winding, high production efficiency, and has the advantages of high speed, small size, high performance, easy to carry, energy saving, long life, etc. It can be applied to vacuum cleaners to obtain super high dust absorption performance.

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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