Pump and pump control circuit apparatus and method
First Claim
1. A pump control circuit for use with a pump, the circuit comprising:
- a pressure sensor capable of sensing a pressure in the pump; and
a microcontroller coupled to the pressure sensor and to the pump,the microcontroller switching operation of the pump from a high-flow mode to a low-flow mode when the pressure in the pump is below a threshold and from a low-flow mode to a high-flow mode when the pressure in the pump is above the threshold,the microcontroller limiting a current provided to the pump to a high-flow current limit value when in the high flow mode that is not dependent on the sensed pressure, andthe microcontroller limiting the current provided to the pump to a low-flow current limit value when in the low flow mode that is less than the high-flow current limit value and that changes depending on the sensed pressure.
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Abstract
Embodiments of the invention provide a pump control circuit for use with a pump. The circuit includes a pressure sensor capable of sensing a pressure in the pump and a microcontroller coupled to the pressure sensor and to the pump. The microcontroller switches operation of the pump between a high-flow mode and a low-flow mode. When in the high flow mode, the microcontroller limits a current provided to the pump to a high-flow current limit value that is not dependent on the sensed pressure. When in the low flow mode, the microcontroller limits the current provided to the pump to a low-flow current limit value that is less than the high-flow current limit value and that changes depending on the sensed pressure.
163 Citations
8 Claims
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1. A pump control circuit for use with a pump, the circuit comprising:
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a pressure sensor capable of sensing a pressure in the pump; and a microcontroller coupled to the pressure sensor and to the pump, the microcontroller switching operation of the pump from a high-flow mode to a low-flow mode when the pressure in the pump is below a threshold and from a low-flow mode to a high-flow mode when the pressure in the pump is above the threshold, the microcontroller limiting a current provided to the pump to a high-flow current limit value when in the high flow mode that is not dependent on the sensed pressure, and the microcontroller limiting the current provided to the pump to a low-flow current limit value when in the low flow mode that is less than the high-flow current limit value and that changes depending on the sensed pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification