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An air-conditioning fan and control method technology, applied in the direction of control of electromechanical transmission, motor generator control, AC motor control, etc., can solve the problems of air conditioner alarm shutdown, component damage, bus voltage exceeding, etc., to avoid alarm shutdown and improve Stability, the effect of avoiding reverse charging
Active Publication Date: 2018-01-09
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
If the air conditioner cannot stop immediately when the bus voltage exceeds the overvoltage protection value, the components will be damaged
[0004] To sum up, in the prior art, the air conditioner fan may reversely charge the busbar, causing the busbar voltage to exceed the overvoltage protection value, causing the air conditioner to alarm and shut down
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Embodiment 1
[0031] The embodiment of the present invention provides a method for controlling an air conditioner fan, wherein the air conditioner fan includes a permanent magnet synchronous motor, such as figure 1 As shown, the method includes:
[0032] S101. The air conditioner fan control device detects the bus voltage of the air conditioner, and determines whether the bus voltage of the air conditioner is greater than the preset magnetizing voltage entry value.
[0033] Wherein, the preset magnetizing voltage entry value is less than the overvoltage protection value of the air conditioner. The preset magnetization voltage entry value may be obtained in advance through experiments on the permanent magnet synchronous motor, which is not specifically limited in the embodiment of the present invention.
[0034] S102. If it is determined that the bus voltage of the air conditioner is greater than the preset magnetizing voltage entry value, the air conditioner fan control device sets the first strai...
Embodiment 2
[0069] The embodiment of the present invention provides an air conditioner fan control device 80, such as Figure 8 As shown, the air-conditioning fan includes a permanent magnet synchronous motor, and the device 80 specifically includes: a detection unit 801, a determination unit 802, a setting unit 803, an acquisition unit 804, and a driving unit 805.
[0070] Among them, the detection unit 801 is used to detect the bus voltage of the air conditioner;
[0071] The determining unit 802 is configured to determine whether the bus voltage of the air conditioner is greater than a preset magnetizing voltage entry value, and the preset magnetizing voltage entry value is less than the overvoltage protection value of the air conditioner;
[0072] The setting unit 803 is configured to, if the determining unit 802 determines that the bus voltage of the air conditioner is greater than the preset magnetizing voltage entry value, set the first straight axis current command value of the permanent ...
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Abstract
The embodiment of the present invention provides an air conditioner fan control method and device, which can solve the problem that the bus voltage exceeds the overvoltage protection value caused by the reverse charging of the air conditioner fan, and prevent the air conditioner from alarming and shutting down due to the reverse charge of the air conditioner fan, thereby improving the performance of the air conditioner. stability. The method includes: detecting the busbar voltage of the air conditioner, and determining whether the busbar voltage of the air conditioner is greater than a preset magnetization voltage entry value, and the preset magnetization voltage entry value is smaller than the overvoltage protection value of the air conditioner; if the busbar voltage of the air conditioner is determined is greater than the preset magnetization voltage entry value, set the first direct axis current command value of the permanent magnet synchronous motor to the pre-stored current value, and the pre-stored current value is greater than zero; obtain the target speed of the permanent magnet synchronous motor, and according to The target speed and the first direct axis current command value are used to drive the permanent magnet synchronous motor, so that the permanent magnet synchronous motor works in a motoring state. The invention is suitable for the technical field of air conditioning.
Description
Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method and device for controlling an air conditioner fan. Background technique [0002] Permanent magnet synchronous motors are widely used in the fans of inverter air conditioners due to their simple structure, small size, light weight, low loss, and high efficiency, and become the trend of choice for inverter air conditioners. [0003] In the prior art, after the air-conditioning controller controls the operation of the air-conditioning fan, the permanent magnet synchronous motor will work in an electric state at a higher speed. At this time, the permanent magnet synchronous motor will receive the electric energy transmitted by the bus in the air-conditioning system, and The electrical energy is converted into corresponding mechanical energy, which drives the fan blades of the fan to operate, thereby transporting the cold / hot air generated by the air conditioner to the room...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/24H02P27/08
Inventor 张俊喜何成军王红霞
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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