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BLDC motor fault state feedback method and application BLDC motor, air-conditioning system

A technology of fault state and air-conditioning system, applied in the direction of application, control system, heating and ventilation control system, etc., can solve the problems of high cost and difficult operation, and achieve the effect of low cost, convenient operation and simple method

Active Publication Date: 2015-11-04
ZHONGSHAN BROAD OCEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common solution now is to add a signal line to the brushless DC motor to feed back the status information of the motor, but this will change the existing motor clamp mold, air conditioner motherboard interface, motor interface, etc., which is very difficult to operate, and high cost

Method used

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  • BLDC motor fault state feedback method and application BLDC motor, air-conditioning system
  • BLDC motor fault state feedback method and application BLDC motor, air-conditioning system
  • BLDC motor fault state feedback method and application BLDC motor, air-conditioning system

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Embodiment 1

[0032] Embodiment one: if figure 1 and figure 2 As shown, the present invention is a BLDC motor. The brushless DC motor includes a stator assembly 1, a rotor assembly 2, and a control circuit board 3. The stator assembly 1 and the rotor assembly 2 are magnetically coupled, and the control circuit board 3 is integrated with a microprocessor Inverter MCU, inverter and interface unit, the microprocessor MCU output signal control inverter, the inverter is connected to control each phase coil winding of the stator assembly 1, the interface unit includes a frequency generating circuit, the microprocessor MCU An I / O port outputs signals of different frequency bands through the frequency generation circuit and forms a port FG. The inverter can be an integrated power module IPM, which contains multiple IGBT components. The Hall element HALL detects the rotor position signal and sends it to the microprocessor. Inverter MCU, the microprocessor MCU outputs signals to control the inverte...

Embodiment 2

[0038] Embodiment two: if figure 1 , figure 2 , image 3 , Figure 5 As shown, the present invention is a BLDC motor, and the BLDC motor includes a stator assembly, a rotor assembly, a control circuit board, the stator assembly and the rotor assembly are magnetically coupled, and the control circuit board is integrated with a microprocessor MCU, an inverter and an interface unit, the microprocessor MCU outputs signals to control the inverter, and the inverter is connected to control the coil windings of each phase of the stator assembly. The interface unit includes a frequency generation circuit, and an I / O port of the microprocessor MCU passes through the frequency generation circuit Output PWM signals with different frequencies and duty ratios to form port FG.

[0039] The principle of the present invention is: when the port FG outputs the motor speed signal externally, its frequency is defined in the first frequency range, and within the scope of the first frequency ran...

Embodiment 3

[0040] Embodiment three: as Figure 9 As shown, the present invention is an air-conditioning system, including an air-conditioning system controller and a BLDC motor driving a fan. The air-conditioning system controller and the BLDC motor have five connection ports, one connected to the ground terminal GND, one speed input port VSP, A DC bus voltage input port VDC, a low-voltage DC power input port VCC and a feedback port FG of the motor speed signal, characterized in that: when the BLDC motor outputs the motor speed signal to the air conditioning system controller, its frequency is defined in the first frequency range , within the range of the first frequency range, the frequency of the PWM signal is used to represent the magnitude of the rotational speed; when the motor fault signal is output, a second frequency signal different from the first frequency range is used. When the port FG outputs the motor speed signal to the outside, its frequency is defined in the first freque...

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Abstract

Disclosed are a fault state feedback method for a BLDC motor, an application of the BLDC motor, and an air-conditioning system. The BLDC motor is provided with a feedback port FG that outputs a motor rotating speed signal outwards, the FG outputting a PWM signal. The method is characterized in that: when the port FG outputs the motor rotating speed signal outwards, the frequency of the signal is defined in a first frequency band, and within the range of the first frequency band, the frequency of the PWM signal is used to represent the rotating speed; and when a motor fault signal is output outwards, a second frequency signal different from the first frequency band is employed. The fault state feedback method is simple, convenient to carry out, capable of feeding back different fault signals of the motor, and high in reliability.

Description

Technical field: [0001] The invention relates to a BLDC motor fault state feedback method and application of the BLDC motor and an air-conditioning system. Background technique: [0002] The BLDC motor (that is, brushless DC motor) used in traditional air-conditioning systems and coil fans in the industry has 5 connection ports, one is connected to the ground terminal GND, one speed input port VSP, one DC bus voltage input port VDC, A low-voltage DC power input port VCC and the feedback port FG of the motor speed signal, and the interfaces of most air conditioner manufacturers are also designed in this way. [0003] But this kind of direct BLDC motor does not set the state feedback of the motor, so the main control board of the air conditioner cannot read the state information of the brushless DC motor, such as over-temperature, locked-rotor, over-current, Hall failure, clock failure, over-voltage, etc. and other motor status information. According to customer needs, motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00H02K11/00F24F11/00
CPCG01D18/00H02P6/08H02P7/00
Inventor 孙海荣
Owner ZHONGSHAN BROAD OCEAN