Abstract A motor control method for an automatic washer having an electronically commutated motor (ECM) serving as a power source, the ECM being serially connected to a washing axle and a drying axle without decreasing a spinning rate of the ECM, includes the steps of judging, when a position of the ECM is sensed from a Hall sensor input, whether the automatic washer is set in a washing mode or in a drying mode, determining a spinning direction command signal if the automatic washer is set in the washing mode, calculating a driving logic at a specific moment angle applicable to the washing mode in the spinning direction command signal, calculating a speed command signal in the ECM and a voltage command signal at a real speed value, modulating a pulse width of the voltage command signal in the driving logic, and outputting the pulse width modulated voltage command value. The method enables the ECM to provide a low speed and high torque in a washing mode region and a high speed and low torque in a drying mode region.
A motor control method for an automatic clothes washer having an electronically commutated motor (ECM) serving as a power source, the ECM being serially connected to a washing axle and a drying axle without decreasing a spinning rate of the ECM, comprising the steps of: judging, when a position of the ECM is sensed from a Hall sensor input, whether the automatic washer is set in a washing mode or in a drying mode; determining a spinning direction command signal when the automatic washer is set in a washing mode; calculating a driving logic at a specific moment angle applicable to a washing mode in the spinning direction command signal; calculating a speed command signal in the ECM and a voltage command signal at a real speed value; modulating a pulse width of the voltage command signal in accordance with the driving logic; and outputting the pulse width modulated voltage command value.
Claim 2
Dependent Claim
152 words
A motor control method for an automatic clothes washer having an electronically commutated motor (ECM) serving as a power source, the ECM being serially connected to a washing axle and a drying axle without decreasing a spinning rate of the ECM, comprising the steps of: judging, when a position of the ECM is sensed from a Hall sensor input, whether the automatic washer is set in a washing mode or in a drying mode; determining a spinning direction command signal when the automatic washer is set in a washing mode; calculating a driving logic at a specific moment angle applicable to a washing mode in the spinning direction command signal; calculating a speed command signal in the ECM and a voltage command signal at a real speed value; modulating a pulse width of the voltage command signal in accordance with the driving logic; and outputting the pulse width modulated voltage command value.
Claim 3
Dependent Claim
67 words
The method of claim 1, further comprising the steps of: calculating, when the automatic washer is set in a drying mode, a driving logic at an applied specific moment angle; calculating a speed command signal in the ECM and a voltage command signal at a real speed value; modulating a pulse width of the voltage command signal in the driving logic; and outputting the calculated driving logic.
Claim 4
Dependent Claim
24 words
The method of claim 2, wherein the applied specific moment angle specified in the drying mode is larger than that in the washing mode.
Claim 5
Dependent Claim
25 words
The method of claim 3, wherein the moment angle is set at 0 degrees in the washing mode and 60 degrees in the drying mode.