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AssigneeEmpresa Brasileira de Compressores S.A. - Embraco
InventorsMarcos Guilherme Schwarz, Paulo Sergio Dainez
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A system and method for controlling a compressor (1) is provided that prevents the piston (5) of the compressor from colliding against the valve system (8, 9) provided therein. The system and method of the present invention control the stroke of the piston (5), allowing the piston (5) to advance as far as the end of its mechanical stroke in extreme conditions of load, without allowing the piston (5) to collide with the valve system (8,9). The present invention controls the compressor (1) by measuring a movement time of the piston (5); comparing the movement time with a foreseen movement time; and altering the voltage (Vm) if the first movement time is different from the foreseen movement time, the foreseen movement time being such that the movement of the piston (5) will reach a maximum point (M).
A method of controlling a compressor (1), which comprises a piston (5) and a linear motor (2), the piston (5) moving along a stroke and being driven by the motor (2), an average voltage (Vm) being applied to the motor (2) and controlling the movement of the piston (5), the method comprising the steps of:
A system of monitoring the position of a piston (5), the piston (5) moving along a stroke and being driven by a motor (2), the motor (2) being driven by a voltage (Vm), the system comprising an electronic circuit (40) monitoring the movement of the piston (5) from the passage at a reference point (R), the reference point (R) being located at a position farther from the end of the stroke of the piston (5) than a maximum point (M), the electronic circuit (40) measuring a permanence time (to) that the piston (5) remains beyond the reference point (R) and comparing the permanence time (to) with a desired foreseen time (tod), the desired foreseen time (tod) being no greater than a maximum stroke time (tom) of maximum stroke when the piston (5) reaches the maximum point (M), the electronic circuit (40) decreasing the voltage (Vm) if the permanence time (to) is longer than the desired foreseen time (tod), and increasing the voltage (Vm) if the permanence time (to) is shorter than the desired foreseen time (tod).
A compressor (1) that comprises:
Dependencies are inferred from the claim text.