CN-122001250-A - Air conditioner and motor control method thereof

CN122001250ACN 122001250 ACN122001250 ACN 122001250ACN-122001250-A

Abstract

The invention provides an air conditioner and a control method of a motor of the air conditioner. The motor is a direct current brushless motor and is provided with an input control port, the control method comprises the steps of receiving a regulating signal sent by an upper computer through the input control port, identifying the regulating signal to obtain a regulating instruction in each signal section, wherein the regulating instruction comprises a direction regulating instruction and a speed regulating instruction, regulating the steering of the motor according to the direction regulating instruction, and regulating the rotating speed of the motor according to the speed regulating instruction. The invention has the advantage that the direction and speed of the motor can be regulated on the premise of not increasing the design cost.

Inventors

ZHANG FEI
WU HONGJIN
GAO BAOHUA
LIU SHUOSHUO

Assignees

青岛海尔空调器有限总公司
海尔智家股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (10)

1. A control method of a motor, the motor being a dc brushless motor having an input control port, the control method comprising: receiving a regulation signal sent by an upper computer through the input control port, wherein the regulation signal comprises at least two signal sections; identifying the regulation and control signals to obtain regulation instructions in each signal section, wherein the regulation instructions comprise direction regulating instructions and speed regulating instructions; And adjusting the steering of the motor according to the steering instruction, and adjusting the rotating speed of the motor according to the speed regulating instruction.
2. The control method of an electric motor according to claim 1, wherein, The regulation and control signal comprises a first signal section and a second signal section which are received in sequence, the direction regulating instruction is configured in the first signal section, and the speed regulating instruction is configured in the second signal section.
3. The control method of an electric motor according to claim 2, wherein, The direction regulating instruction is a first pulse signal in the first signal section, the speed regulating instruction is a second pulse signal in the second signal section, and The second pulse signal has a different pulse width than the first pulse signal.
4. The control method of the motor according to claim 1, wherein the step of adjusting the steering of the motor according to the steering instruction includes: determining target steering of the motor according to the steering instruction; And adjusting the current direction of the motor according to the target steering.
5. The control method of an electric motor according to claim 1, wherein the step of adjusting the rotational speed of the electric motor according to the speed regulation command: Determining a target voltage of the motor according to the speed regulation instruction; and adjusting the working voltage of the motor to the target voltage.
6. The control method of an electric motor according to claim 1, wherein, The input control port is a rotating speed control port of the motor.
7. The control method of an electric motor according to claim 1, wherein the electric motor further has an output control port, the control method further comprising: Detecting the rotating speed of the motor and generating corresponding rotating speed feedback pulses; And sending the rotating speed feedback pulse to the upper computer through the output control port.
8. The control method of the motor according to claim 7, further comprising: Detecting the current of the motor and judging whether the current is abnormal or not; if the abnormal condition exists, the abnormal condition of the motor is fed back to the upper computer.
9. The control method of the motor according to claim 8, the step of feeding back an abnormal condition of the motor to the upper computer comprising: Adjusting the pulse width of at least one rotating speed feedback pulse generated by the motor; and sending the adjusted rotating speed feedback pulse to the upper computer through the output control port.
10. An air conditioner comprising a motor employing the control method of any one of claims 1 to 9.

Description

Air conditioner and motor control method thereof Technical Field The invention relates to the technical field of motors, in particular to a control method of a motor. Background With the rapid development of modern technology, the brushless DC motor is widely applied in the field of household appliances due to the advantages of high efficiency, low noise, long service life and the like. From high-end air conditioners, intelligent washing machines to portable dust collectors, direct-current brushless motors have become a core power source for various household appliances. However, under the prior art framework, the use of a brushless dc motor with control still faces some challenges, especially in terms of forward and reverse rotation control. Conventionally, a belt-controlled brushless dc motor is mostly designed to rotate in one direction, i.e., only one application of steering can be realized. The VSP (Voltage Speed Position, namely voltage, speed and position) branch in the control system is mainly used for receiving the motor rotating speed regulating instruction sent by the upper computer so as to realize accurate rotating speed control. However, when the household electrical appliance requires the motor to realize the double steering function in different scenes, the traditional design is not attractive. To achieve forward and reverse rotation control of the motor, the prior art generally employs a method of adding ports and leads to the motor IC (INTEGRATED CIRCUIT, i.e., integrated circuit). Although the method meets the requirement of double steering of the motor to a certain extent, the method also brings new problems. In one aspect, adding IC ports and leads can significantly increase the design costs of the motor, including material costs, manufacturing costs, and subsequent maintenance costs. On the other hand, this approach also limits the chip application range of the motor, so that the motor lacks flexibility and versatility in design and production. With the increasing personalized demands of household appliances, the requirements of consumers on motor performance are also increasing. For example, in an air conditioning system, a motor needs to be able to automatically adjust a wind direction and a rotation speed according to an indoor temperature and a user setting, in a washing machine, the motor needs to be able to achieve different turning and rotation speeds at different stages of washing, rinsing, and dehydrating, and in a cleaner, the motor needs to adjust suction and turning according to different cleaning tasks. These demands are all urgent for motors with more flexible and intelligent forward and reverse control capability. Therefore, how to realize the forward and reverse rotation control of the belt-controlled brushless DC motor without increasing the design cost of the motor and limiting the application of the chip becomes a technical problem to be solved in the current household appliance field. Disclosure of Invention In view of the above, the present invention proposes an air conditioner and a control method of a motor thereof that overcome or at least partially solve the above problems. An object of the first aspect of the present invention is to achieve both direction and speed regulation of a motor without increasing the design cost. A further object of the first aspect of the invention is to achieve a failure warning of the motor without increasing the design costs. In particular, according to a first aspect of the present invention, there is provided a control method of a motor, the motor being a dc brushless motor having an input control port, the control method comprising: receiving a regulation signal sent by an upper computer through the input control port, wherein the regulation signal comprises at least two signal sections; identifying the regulation and control signals to obtain regulation instructions in each signal section, wherein the regulation instructions comprise direction regulating instructions and speed regulating instructions; And adjusting the steering of the motor according to the steering instruction, and adjusting the rotating speed of the motor according to the speed regulating instruction. Optionally, the regulation signal includes a first signal section and a second signal section that are received in sequence, the direction regulating instruction is configured in the first signal section, and the speed regulating instruction is configured in the second signal section. Optionally, the direction regulating instruction is a first pulse signal in the first signal section, the speed regulating instruction is a second pulse signal in the second signal section, and The second pulse signal has a different pulse width than the first pulse signal. Optionally, the step of adjusting the steering of the motor according to the steering instruction comprises: determining target steering of the motor according to the steering instruction; And adjusting the cur