Observer-based protection method for vacuum cleaner motor plugging holes

Abstract

The present invention provides an observer-based method for protecting holes in vacuum cleaner motors, comprising the following steps: obtaining the motor speed ω, the moment of inertia J of the rotor and the impeller, and the electromagnetic torque t output by the motor e And the damping coefficient B of the mechanical transmission system; bring the obtained parameters into the motor mechanical motion equation, and calculate the motor load torque t according to the motor mechanical motion equation l The estimated speed ω_estimate when it is 0; use the estimated speed ω_estimate to compare with the actual speed ω, and use the PI controller to control the load torque t l Make corrections to obtain the load torque t corresponding to the actual speed ω l ;The load torque t to be obtained l Compared with the threshold value A measured in advance, it is judged whether the air inlet of the vacuum cleaner is blocked. According to the mechanical motion equation of the motor, the method is detected by the internal parameters of the motor, which is more accurate, and can detect the fully blocked state in a relatively short period of time, with high precision.

Description

technical field [0001] The invention relates to the technical field of vacuum cleaners, in particular to an observer-based method for protecting holes in vacuum cleaner motors. Background technique [0002] With the improvement of people's living standards, vacuum cleaners have gradually replaced brooms and become the main cleaning tool. Vacuum cleaners can be divided into vertical, horizontal and portable according to their structure. The vacuum cleaner mainly includes 5 parts: the air inlet, the exhaust port, the air pump (composed of the motor and the wind impeller), the dust collection and storage device, and the housing. When the vacuum cleaner is working, the air pump rotates and pushes the air to the exhaust port. When the air is pushed forward, the particle density in front of the fan will increase, and the air pressure will increase accordingly, while the air density behind the fan will decrease. At this time, the pressure behind the air pump is lower than the pres...

AI Technical Summary

Problems solved by technology

When the user uses the vacuum cleaner, if there is a foreign object to block all the air inlets, then there will be no air inflow, the motor and the control board will not be able to dissipate heat, and the temperature will rise rapidly. If the time is too long, the motor and the control board will be damaged.

[0004] The publication number is CN201810191120.2, and the patent name is: A detection method and device for vacuum cleaner plugging holes, and a vacuum cleaner patent discloses a plugging detection method, such as figure 1 The schematic diagram of the acceleration process of the motor is shown. This method is detected by the external variables of the motor such as speed, duty cycle and bus current. It can only be judged after the motor is stable, and it takes a long time to protect

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