Integrated scroll compressor and dynamic process oscillation suppression method and device thereof
A scroll compressor and dynamic process technology, which is applied in the control of electromechanical transmission, motor control, motor generator control, etc., can solve problems such as large common-mode electromagnetic interference, inability to know the vibration state of the motor, and voltage signal distortion
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Embodiment 1
[0059] Such as figure 1 As shown, this embodiment provides a method for suppressing dynamic process oscillation of an integrated scroll compressor, the method includes the following steps:
[0060] S101. Obtain a DC bus current.
[0061] The DC bus current in this embodiment refers to the DC bus current on the frequency converter circuit board of the integrated scroll compressor, which is obtained through non-isolated circuit measurement, such as figure 2 As shown, the first sampling resistor RS of milliohm level is connected in series between the confluence point of the lower bridge arm of the three-phase full bridge and the negative pole of the battery, and the voltage V of the microvolt level at both ends of the first sampling resistor RS is measured. RS , after being amplified by the operational amplifier A1, the DC bus current I suitable for single-chip processing is obtained s , DC bus current I s It is also the working current of the motor that is supplied by the ba...
Embodiment 2
[0093] Such as Figure 8 As shown, this embodiment provides an integrated scroll compressor dynamic process oscillation suppression device, which includes an acquisition module 801, a first calculation module 802, a second calculation module 803, a first judgment module 804, a second judgment module Module 805, the first oscillation suppression module 806 and the second oscillation suppression module 807, the specific functions of each module are as follows:
[0094] The acquiring module 801 is configured to acquire the DC bus current.
[0095] The first calculation module 802 is used to perform high-pass filtering and discrete Fourier transform on the DC bus current to calculate the first oscillation characteristic variable. The first calculation module 802 is as follows: Figure 9 shown, including:
[0096] The filter processing unit 8021 is configured to use a high-pass filter to perform filter processing on the DC bus current.
[0097] The discrete Fourier transform uni...
Embodiment 3
[0110] This embodiment provides an integrated scroll compressor, including a frequency converter and a motor, the frequency converter is connected to the motor, the single-chip microcomputer of the frequency converter stores a program, and when the single-chip microcomputer executes the stored program, the above implementation is realized. The method of Example 1 is as follows:
[0111] Obtain the DC bus current; perform high-pass filtering and discrete Fourier transform on the DC bus current, and calculate the first oscillation characteristic variable; calculate the reactive power of the motor, filter the reactive power with a high-pass filter, and calculate The second oscillation characteristic variable; according to the first oscillation characteristic variable and the second oscillation characteristic variable, a linear discriminator is constructed to judge whether the dynamic process of the integrated scroll compressor oscillates; when the dynamic process of the integrated...
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