A method for operating a linear compressor is provided. The method includes estimating an acceleration of the motor of the linear compressor using at least a robust integral of the sign of the error feedback. A position of the motor of the linear compressor when the motor of the linear compressor is
A method for operating a linear compressor is provided. The method includes estimating an acceleration of the motor of the linear compressor using at least a robust integral of the sign of the error feedback. A position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point is also determined based at least in part on a measured current to the motor of the linear compressor and an estimated acceleration of the motor. The position of the motor of the linear compressor when the motor of the linear compressor is at a top dead center point is calculated based at least in part on the position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point and a stroke length of the motor of the linear compressor.
대표청구항▼
1. A method for operating a linear compressor, comprising: providing a mechanical dynamic model for the linear compressor, the mechanical dynamic model for the linear compressor comprises x¨=-CMx.-KM(xavg-x0)+αMi+1MFgas=αMi+fx(t)wherefx(t)=1MFgas-CMx.-KM(xavg-x0)+αMiM is a moving mass of
1. A method for operating a linear compressor, comprising: providing a mechanical dynamic model for the linear compressor, the mechanical dynamic model for the linear compressor comprises x¨=-CMx.-KM(xavg-x0)+αMi+1MFgas=αMi+fx(t)wherefx(t)=1MFgas-CMx.-KM(xavg-x0)+αMiM is a moving mass of the linear compressor,α is a motor force constant of a motor of the linear compressor,i is a current through the motor of the linear compressor,{umlaut over (x)} is an acceleration of the motor of the linear compressor,C is a damping coefficient of the linear compressor,{dot over (x)} is a velocity of the motor of the linear compressor,K is a spring stiffness of the linear compressor,x is a position of the moving mass of the linear compressor,xavg is an average position of the moving mass of the linear compressor, andFgas is a gas force;supplying the motor of the linear compressor with a time varying voltage;measuring a current to the motor of the linear compressor during said step of supplying, a velocity of the motor of the linear compressor being zero when the motor of the linear compressor is at a bottom dead center point during said step of measuring;calculating an observed acceleration of the motor of the linear compressor using at least the mechanical dynamic model for the linear compressor and a robust integral of the sign of the error feedback by solving x¨^=αMi+f^x(t)with {circumflex over (f)}x being given as f^x=(k1+1)ex(t)+∫t0t[(k1+1)ex(σ)+k2sgn(ex(σ))]dσ-(k1+1)ex(t0)and where {umlaut over ({circumflex over (x)})} is the observed acceleration of the motor of the linear compressor,k1 and k2 are real, positive gains,sgn is the signum function,ex is an error given as {dot over (x)}−{dot over ({circumflex over (x)})},{dot over ({circumflex over (x)})} is an observed velocity of the motor of the linear compressor,ex(σ) is ex as a function of σ,ex(t) is ex as a function of time, andex(t0) is ex at time t0;determining a position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point based at least in part on the current to the motor of the linear compressor at the bottom dead center point from said step of measuring and the observed acceleration of the motor;calculating the position of the motor of the linear compressor when the motor of the linear compressor is at a top dead center point based at least in part on the position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point from said step of determining and a stroke length of the motor of the linear compressor; andadjusting the time varying voltage supplied to the motor of the linear compressor in response to the calculated position of the motor of the linear compressor. 2. The method of claim 1, wherein the linear compressor is positioned within a refrigerator appliance. 3. The method of claim 1, said step of determining the position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point comprises solving xBDC=αKiBDC-MKx¨BDCwhere iBDC is the current to the motor of the linear compressor from said step of measuring; and{umlaut over (x)}BDC is the observed acceleration of the motor. 4. The method of claim 3, wherein said step of calculating the position of the motor of the linear compressor when the motor of the linear compressor is at a top dead center point comprises solving xTDC=xBDC−SL where SL is the stroke length of the motor of the linear compressor. 5. The method of claim 1, wherein said steps of estimating, determining and calculating are conducted with the motor of the linear compressor sealed within a hermetic shell of the linear compressor. 6. A method for operating a linear compressor, comprising: supplying a motor of the linear compressor with a time varying voltage, the motor of the linear compressor disposed within a hermetic shell of the linear compressor during said step of supplying;measuring a current to the motor of the linear compressor during said step of supplying, a velocity of the motor of the linear compressor being zero when the motor of the linear compressor is at a bottom dead center point during said step of measuring;calculating an observed acceleration of the motor of the linear compressor using a robust integral of the sign of the error feedback by solving x¨^=αMi+f^x(t)with {circumflex over (f)}x being given as f^x=(k1+1)ex(t)+∫t0t[(k1+1)ex(σ)+k2sgn(ex(σ))]dσ-(k1+1)ex(t0)and where {umlaut over ({circumflex over (x)})} is the observed acceleration of the motor of the linear compressor,k1 and k2 are real, positive gains,sgn is the signum function,ex is an error given as {dot over (x)}−{dot over ({circumflex over (x)})},{dot over ({circumflex over (x)})} is an observed velocity of the motor of the linear compressor,ex(σ) is ex as a function of σ,ex(t) is ex as a function of time, andex(t0) is ex at time t0;determining a position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point based at least in part on the current to the motor of the linear compressor from said step of measuring and the observed acceleration of the motor by solving xBDC=αKiBDC-MKx¨BDCwhere α is a motor force constant of the motor of the linear compressor,K is a spring stiffness of the linear compressor,iBDC is the current to the motor of the linear compressor from said step of measuring,M is a moving mass of the linear compressor, and{umlaut over (x)}BDC is the observed acceleration of the motor;calculating the position of the motor of the linear compressor when the motor of the linear compressor is at a top dead center point based at least in part on the position of the motor of the linear compressor when the motor of the linear compressor is at the bottom dead center point from said step of determining and a stroke length of the motor of the linear compressor; andadjusting the time varying voltage supplied to the motor of the linear compressor in response to the calculated position of the motor of the linear compressor. 7. The method of claim 6, wherein the linear compressor is positioned within a refrigerator appliance. 8. The method of claim 6, wherein said step of calculating the position of the motor of the linear compressor when the motor of the linear compressor is at a top dead center point comprises solving xTDC=xBDC−SL where SL is the stroke length of the motor of the linear compressor.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (39)
Tsai,Chin Shiong, AC servo drive without current sensor.
Tojo Naoto,JPX ; Matsumura Shinichi,JPX ; Nakayama Takafumi,JPX ; Takaoka Daizo,JPX, Circuit arrangement for driving a reciprocating piston in a cylinder of a linear compressor for generating compressed ga.
Beale William T. (Athens OH) van der Walt Nicholas R. (Athens OH) Unger Reuven Z. (Athens OH), Fluid bearing with compliant linkage for centering reciprocating bodies.
Higham Graham (Scottsdale AZ) Young Niels (Boise ID) Weeks Alan (Lunenburg MA) Michaud Steven A. (Haverhill MA) Sand William (Lexington MA), Linear drive motor with flexible coupling.
Dainez, Paulo Sérgio; Lilie, Dietmar Erich Bernhard, Linear-compressor control system, a method of controlling a linear compressor, a linear compressor and cooling system.
Dicken, Lane Daniel; Nelson, Arthur R.; Lund, Jr., Dennis Eugene; Belk, Daniel James, Machined spring with integral retainer for closed cycle cryogenic coolers.
Lilie, Dietmar Erich Bernhard; Ferreira, Nerian Fernando; Knies, Marcelo; Dainez, Paulo Sergio, Method of detecting impact between cylinder and piston driven by a linear motor, detector of impact between a cylinder and piston driven by a linear motor, gas compressor, control system for a cylinder and a piston set driven by a linear motor gas compressor, control system for a cylinder and a piston set driven by a linear motor.
Neubauer Werner (Munchen DEX) Bocionek Siegfried (Munchen DEX) Moller Marcus (Munchen DEX) Joppich Martin (Unterhaching DEX), Process for optimizing control parameters for a system having an actual behavior depending on the control parameters.
Curwen Peter W. (Ballston Spa NY) Dorman Richard A. (Troy NY), Resonant piston compressor having improved stroke control for load-following electric heat pumps and the like.
Shearer, Tony L.; Smith, Robert W. M.; Hofmann, Heath F., Sensorless control of a harmonically driven electrodynamic machine for a thermoacoustic device or variable load.
Dainez, Paulo Sergio; de Oliveira, José; Nied, Ademir, System for controlling a resonant linear compressor piston, method for controlling a resonant linear compressor piston, and resonant linear compressor.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.