Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1995-12-04
1998-01-27
Cabeca, John W.
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
318458, 388815, 622281, G05B 500, F25B 100
Patent
active
057125511
ABSTRACT:
A brushless DC motor compressor starting circuit protecting apparatus for a refrigerator and a method thereof, for controlling excessive current flowing through a coil of a brushless DC motor which is caused by a pressure load of the refrigerator when a compressor starts, before the compressor repeats turning on and off according to a temperature cycle, are provided with a resistor mounted on a circuit board, and a relay for connecting the resistor in series with a motor coil, so that the resistor is connected in series with the coil when a large current flows at an initial driving. Here, a power voltage of a motor driver is divided by a dividing means and an initial-rotation state of the motor is detected by the divided voltage. Therefore, the destruction of a switching device and the demagnetization of a permanent magnet can be prevented and a stable starting can be achieved by restraining the excessive current flowing in the motor coil at the compressor starting.
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Cabeca John W.
Samsung Electronics Co,. Ltd.
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