75results about How to "Improve fluctuation suppression effect" patented technology

The invention relates to a full-bridge MMC sub-module capacitor voltage fluctuation suppression method. The method comprises the steps of: acquiring an AC side current amplitude of a full-bridge MMC, and acquiring a theoretically required circulating current value according to the AC side current amplitude, a power factor angle, and a sub-module capacitor voltage fluctuation component model of the full-bridge MMC; acquiring an upper bridge arm current instantaneous value, a lower bridge arm current instantaneous value and a direct current instantaneous value of the full-bridge MMC, and calculating to obtain an actual circulating current value of the full-bridge MMC; and calculating a difference value between the theoretically required circulating current value and the actual circulating current value, generating a reference voltage according to the difference value, injecting the reference voltage into the full-bridge MMC, generating the required circulating current in each phase after modulation, and suppressing the capacitor voltage fluctuation of each sub-module. According to the full-bridge MMC sub-module capacitor voltage fluctuation suppression method, the corresponding reference voltage can be injected according to the actual circulation value, and the sub-module capacitor voltage fluctuation suppression effect can be improved.

The invention discloses an air conditioner compressor rotating speed fluctuation suppression method. The method includes processes of controlling a compressor according to real-time angular velocity and moment. The process of controlling the compressor according to the real-time angular velocity includes the following steps: filtering axis errors to obtain an angular velocity compensation amount;obtaining a compensated angular velocity output amount according to the angular velocity compensation amount; and correcting the real-time angular velocity according to the compensated angular velocity output amount and controlling the compressor; The process of controlling the compressor according to the moment includes the following steps: calculating a difference between a target angular velocity fluctuation amount and the compensated angular velocity output amount to obtain a first angular velocity difference; filtering the first angular velocity difference to obtain filtered angular velocity; inputting the filter angular velocity into a speed loop regulator to obtain output moment; obtaining a moment compensation amount according to the first angular velocity difference; and obtainingcompensated output moment according to the moment compensation amount and the output and controlling the compressor. The effectiveness of compressor rotating speed fluctuation suppression can be improved by applying the air conditioner compressor rotating speed fluctuation suppression method.

The invention discloses a method for controlling the rotating speed of a single-rotor compressor. The method comprises the process of controlling the compressor according to the real-time angular velocity and the process of controlling the compressor according to the torque, wherein the process of controlling the compressor according to the real-time angular velocity comprises the following stepsthat filtering processing is carried out on the shaft error so as to obtain the shaft error compensation amount; the shaft error compensation amount is input to a phase-locked loop adjuster so as to obtain the output angular velocity of the phase-locked loop adjuster; and the real-time angular velocity is corrected by utilizing the output angular velocity, and the compressor is controlled according to the corrected real-time angular velocity. The process of controlling the compressor according to the torque comprises the following steps that the difference between the target angular velocity fluctuation amount and the output angular velocity of the phase-locked loop adjuster is calculated so as to obtain a first angular velocity difference value; filtering processing is carried out on thefirst angular velocity difference value to obtain the filtering angular velocity; the filtering angular velocity is input to a speed loop regulator so as to obtain the output torque; and the compressor is controlled according to the output torque. By applying the method, the effectiveness of fluctuation inhibition of the rotating speed of the compressor can be improved.

The invention discloses a method and a device for controlling the rotational speed of a compressor. The method comprises the following steps: obtaining the axis error reflecting the bias of the actualposition and the constructive position of the rotor of the compressor; carrying out filtering processing on the axis error to obtain axis error compensation quantity after at least a part of axis error is filtered; taking the axis error compensation quantity as an input quantity to be put into a phase-locked loop adjuster in a phase-locked loop used for compressor control to obtain the output angular speed of the phase-locked loop adjuster; taking the output angular speed of the phase-locked loop adjuster as an input quantity to be put into a speed ring adjuster in a speed ring used for compressor control to obtain the output torque of the speed ring adjuster; using the output angular speed of the phase-locked loop adjuster to correct real-time angular speed used for compressor control, and controlling the compressor according to the corrected real-time angular speed and the output torque of the speed ring adjuster. By using the method, the rotational speed fluctuation inhibition effectiveness of the compressor can be improved.

The invention discloses a method for controlling the rotating speed of a compressor of an air conditioner. The method includes the processes of controlling the compressor according to the real-time angular speed and the torque; the process of controlling the compressor according to the real-time angular speed includes the following steps that filtering processing is performed on the axis error, and the angular speed compensation quantity is acquired; the compensated angular speed output quantity is acquired according to the angular speed compensation quantity; the real-time angular speed is corrected according to the compensated angular speed output quantity, and the compressor is controlled; the process of controlling the compressor according to the torque includes the following steps that the difference between the target angular speed fluctuation quantity and the fed-back angular speed quantity is calculated, and the first angular speed difference is acquired; filtering processing is performed on the first angular speed difference, and the filtered angular speed is acquired; the filtered angular speed is input into a speed loop regulator, and the output torque is acquired; the torque compensation quantity is acquired according to the first angular speed difference; the compensated output torque is acquired according to the torque compensation quantity and the output torque,and the compressor is controlled. By the aid of the method, the effectiveness of suppressing of the fluctuation of the rotating speed of the compressor can be improved.

The invention discloses a method and device of suppressing the rotating speed fluctuation of an air conditioner compressor. The method comprises the steps that an axis error which reflects the deviation between the practical position and the presumptive position of a compressor rotor is acquired; the axis error is subjected to filtering treatment, so that a corrected axis error which is formed after at least one part of the axis error fluctuation is filtered away and the angular speed compensation quantity which corresponds to the corrected axis error are obtained; the angular speed compensation quantity compensates for the output angular speed of a phase-locked loop regulator in a phase-locked loop of the compressor, so that the compensated angular speed output quantity is obtained; meanwhile, the direct-current portion of the angular speed compensation quantity is extracted, and the direct-current portion and the compensated angular speed output quantity are inputted into a speed loop regulator in a speed loop for compressor control by serving as the input quantities; and the real-time angular speed for compressor control is corrected according to the compensated angular speed output quantity, and the compressor is controlled according to the corrected real-time angular speed and the output torque of the speed loop regulator. By use of the method and device, the effectivenessof suppression of the rotating speed fluctuation of the compressor can be improved.

The invention discloses a method for controlling the rotating speed of a single-rotor compressor. The method includes the processes of controlling the compressor according to the real-time angular speed and the torque. The process of controlling the compressor according to the real-time angular speed includes the steps that the axis error is filtered, and an angular speed compensation dosage is obtained; the angular speed compensation dosage is compensated into the output angular speed of a phase-locked loop adjuster, and the compensated angular speed output quantity is obtained; and the real-time angular speed is corrected according to the compensated angular speed output quantity, and the compressor is controlled according to the corrected real-time angular speed. The process of controlling the compressor according to the torque includes the steps that the difference between the target angular speed fluctuation quantity and the compensated angular speed output quantity is calculated,and a first angular speed difference value is obtained; the first angular speed difference value is filtered, and the filtered angular speed is obtained; the filtered angular speed is input in a speed loop adjuster, and the output torque is obtained; and the compressor is controlled according to the output torque. By means of the method, the effectiveness of rotating speed fluctuation suppressionof the compressor can be improved.