CN213046722U - Low-cost dust catcher motor control device - Google Patents

Abstract

The utility model provides a low-cost dust catcher motor control device, include: the device comprises a main control chip, an inverter, a back electromotive force detection module and an analog switch chip; wherein, the main control chip is a universal chip; the inverter is connected with the main control chip; the main control chip modulates a required target pulse width modulation signal according to the rotating speed and/or power requirement and provides the target pulse width modulation signal for the inverter; the inverter is used for providing a target pulse width modulation signal for the motor so as to control the rotating speed and/or power of the motor; the back electromotive force detection module is connected between the main control chip and the motor and used for detecting the back electromotive force of the motor in real time during operation; the analog switch chip is connected with the pin and has three working states: a temperature detection state, a voltage detection state and a switch state; the analog switch chip switches among the three working states. The embodiment of the utility model provides a not only reduce cost can realize controlling means's whole control function simultaneously.

Description

Low-cost dust catcher motor control device

Technical Field

The utility model relates to a dust catcher motor control field especially relates to a low-cost dust catcher motor control device.

Background

Consumer electronics such as household cleaners impose stringent cost control requirements. The wireless dust collector in the current market is basically formed by combining a battery pack, a battery management system, a motor control panel and a shell, and the cost of the four components is strictly controlled in order to reduce the cost of the whole dust collector.

As a supplier of the motor control panel of the dust collector, the motor control panel is competitive in the market only by designing a scheme with low cost and excellent function. In the scheme of the motor control panel of the dust collector, the price of the main control chip directly determines the price of the whole control panel. At present, a main chip in a motor control board mostly uses a motor control special chip. The pin resources of the motor control proprietary chip are rich, but the price is high, and all pins are not required to be used in some projects. In this case, not only the cost of the entire board is increased, but also the pin resources are wasted, and the cost is increased due to phase change.

SUMMERY OF THE UTILITY MODEL

Based on the foregoing prior art defect, the embodiment of the utility model provides a low-cost dust catcher motor control device, but the above-mentioned problem of solution of preferred.

In order to achieve the above object, the present invention provides the following technical solutions.

A low cost vacuum cleaner motor control apparatus comprising: the device comprises a main control chip, an inverter, a back electromotive force detection module and an analog switch chip; wherein,

the main control chip is a universal chip;

the inverter is connected with the main control chip; the main control chip modulates a required target pulse width modulation signal according to the rotating speed and/or power requirement and provides the target pulse width modulation signal for the inverter; the inverter is used for providing the target pulse width modulation signal to the motor so as to control the rotating speed and/or power of the motor;

the back electromotive force detection module is connected between the main control chip and the motor and used for detecting the back electromotive force of the motor in real time during running; the motor is a direct current brushless motor;

the analog switch chip is connected with the pins and has three working states: a temperature detection state, a voltage detection state and a switch state; the analog switch chip is switched among the three working states.

The utility model discloses low-cost dust catcher motor control device has following advantage:

1. the universal chip is used for replacing a motor special control chip, so that the cost is greatly reduced;

2. the simulation switch chip is used for expanding one pin of the main control chip into three functions and switching among the three functions in turn, so that the problem that the pin of a common chip is insufficient is solved, the functions required by a dust collector project can be completed, and the cost is greatly reduced.

Therefore, the utility model discloses low-cost dust catcher motor control device not only the cost is reduced, can realize controlling means's whole control function simultaneously.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:

fig. 1 is a circuit topology diagram of a low-cost vacuum cleaner motor control device according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, an embodiment of the present invention provides a low-cost motor control device for a vacuum cleaner, which includes: the device comprises a main control chip 1, an inverter 2, a counter electromotive force detection module 3 and an analog switch chip 4. Wherein:

the main control chip 1 is a universal chip;

the inverter 2 is connected with the main control chip 1; the main control chip 1 modulates a required target pulse width modulation signal PWM according to the rotating speed and/or power requirement and provides the target pulse width modulation signal PWM to the inverter 2; the inverter 2 is used for providing a target pulse width modulation signal to the motor 5 so as to control the rotating speed and/or power of the motor 5;

the back electromotive force detection module 3 is connected between the main control chip 1 and the motor 5 and is used for detecting the back electromotive force of the motor 5 in real time during operation; the motor 5 is a direct current brushless motor;

the analog switch chip 4 is connected with a pin GPIO and has three working states: a temperature detection state, a voltage detection state and a switch state; the analog switch chip 4 switches between three operating states.

In this embodiment, the main control chip 1 is a general chip, and is not a control chip specific to the motor, and the back electromotive force information of the motor 5 during operation is detected in real time by the back electromotive force detection module 3 in a non-inductive square wave control mode, so as to control the rotation speed and/or power of the motor 5, modulate PWM according to the rotation speed or power requirement, and further control the inverter 2, thereby achieving the purpose of controlling the operation of the dc brushless motor.

The bus current is sampled by an analog digital channel of the main control chip 1 and is used for constant power calculation. The main control chip 1 comprises a comparator for overcurrent protection. In order to improve the utilization rate of the pin of the main control chip 1, one GPIO pin of the main control chip 1 is switched among three states of temperature, voltage and switch by turns by utilizing the analog switch chip 4; the obtained temperature value is used for temperature protection of the control device, the voltage value is used for constant power control and over-voltage and under-voltage protection of the control device, and the switch state is used for gear control of the control device.

In this embodiment, any suitable current configuration or model, for example, the known embodiment provided by the publication number CN106418623B, may be used as the general chip of the main control chip 1, and this embodiment is not limited thereto. Similarly, the inverter 2, the back electromotive force detection module 3, and the analog switch chip 4 may be any suitable structure, and the present embodiment is not limited thereto.

The utility model discloses low-cost dust catcher motor control device has following advantage:

1. the universal chip is used for replacing a motor special control chip, so that the cost is greatly reduced;

2. the analog switch chip 4 is used for expanding one GPIO pin of the main control chip 1 into three functions and switching among the three functions in turn, so that the problem that the pin of a common chip is insufficient is solved, the functions required by a dust collector project can be completed, and the cost is greatly reduced.

Therefore, the utility model discloses low-cost dust catcher motor control device not only the cost is reduced, can realize controlling means's whole control function simultaneously.

The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the disclosure of the application document.

Claims (1)

1. A low-cost motor control device for a dust collector is characterized by comprising: the device comprises a main control chip, an inverter, a back electromotive force detection module and an analog switch chip; wherein,

the main control chip is a universal chip;

the inverter is connected with the main control chip; the main control chip modulates a required target pulse width modulation signal according to the rotating speed and/or power requirement and provides the target pulse width modulation signal for the inverter; the inverter is used for providing the target pulse width modulation signal to the motor so as to control the rotating speed and/or power of the motor;

the back electromotive force detection module is connected between the main control chip and the motor and used for detecting the back electromotive force of the motor in real time during running; the motor is a direct current brushless motor;

the analog switch chip is connected with the pins and has three working states: a temperature detection state, a voltage detection state and a switch state; the analog switch chip is switched among the three working states.

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