Compressor driving system and control method and device of compressor driving system
A technology of drive system and control method, which is applied in the direction of pump control, machine/engine, mechanical equipment, etc., can solve problems such as beating vibration, and achieve the effect of avoiding noise and vibration problems and eliminating beating vibration
Active Publication Date: 2017-08-04
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology
[0004] However, when the capacitor miniaturization motor drive technology is applied to the compressor drive system with high requirements on cost and energy saving, since the capacitor miniaturization motor drive technology needs to output a fluctuating torque with the same frequency as twice the power supply frequency, to ensure the reverse Variable voltage utilization and satisfying the high power factor of the drive, so this technology will inevitably cause the motor output speed to have a fluctuation component that is consistent with twice the power supply frequency. At the same time, due to the periodic fluctuation of the compressor load, the frequency of the fluctuation component Does not coincide with twice the mains frequency, so it is likely to cause beating
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[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0036]Before the detailed description of the control method of the compressor drive system, the control device of the compressor drive system and the compressor drive system with the control device of the embodiments of the present invention, the mechanism of the beating phenomenon of the compressor will be analyzed in detail.
[0037] image 3 It is a schematic diagram of the principle of beating vibration phenomenon, and it is also a closed-loop model of the capacitor miniaturized compressor drive system. Such as image 3 As ...
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The invention discloses a compressor driving system and a control method and device of the compressor driving system. The method includes the following steps that the current running frequency of a compressor is obtained, and whether the current running frequency of the compressor is in the preset beat vibration frequency set or not is judged; if the current running frequency of the compressor is in the preset beat vibration frequency set, the preset fluctuation quantity is superposed on the current running frequency of the compressor, and therefore the frequency given value of the next control period of the compressor is obtained; and the compressor is controlled according to the frequency given value of the next control period. By means of the method, due to the fact that the fluctuation quantity is superposed on the running frequency of the compressor to obtain the frequency given value of the next control period, the compressor is controlled according to the frequency given value, the beat vibration phenomenon generated due to interaction of compressor periodical load fluctuation and input alternate current power supply fluctuation is effectively eliminated, and the problems of noise and vibration caused by the beat vibration phenomenon are solved.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a control method of a compressor drive system, a computer storage medium, a control device of the compressor drive system and a compressor drive system with the control device. Background technique [0002] With the improvement of consumers' energy-saving requirements for electromechanical products, variable frequency motor drives with higher efficiency have been more and more widely used. Such as figure 1 As shown, the DC bus voltage of the conventional variable frequency drive is in a stable state, and the inverter part is relatively independent of the input AC voltage, so that the control of the inverter part does not need to consider the instantaneous change of the input voltage, which is convenient for the realization of the control method. However, this design method needs to be equipped with an electrolytic capacitor with a large capacitance, which increases the siz...
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Login to View More IPC IPC(8): F04B49/06
CPCF04B49/065
Inventor 张国柱
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD