Pump controller system and method
First Claim
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1. A method of detecting a fault condition in a pump control system having a motor connected to a pump, the method comprising:
- receiving an alternating current power supply;
converting the alternating current power supply to a direct current power supply and providing the direct current power supply to a bus having a current;
operating the motor in a forward direction;
measuring a first bus current value being provided to the motor in the forward direction;
operating the motor in a reverse direction if the first bus current value is greater than a bus current upper limit setting;
measuring a second bus current value being provided to the motor in the reverse direction;
generating a fault condition code if the second bus current value is greater than the bus current upper limit setting;
shutting down a drive to the motor in order to stop the pump when the second bus current value is greater than the bus current upper limit setting;
providing the direct current power supply to the bus when the drive is shut down; and
operating the motor in the forward direction if the second bus current value is less than the bus current upper limit setting.
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Abstract
A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can detect fault conditions, and can store fault conditions for later retrieval.
939 Citations
16 Claims
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1. A method of detecting a fault condition in a pump control system having a motor connected to a pump, the method comprising:
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receiving an alternating current power supply; converting the alternating current power supply to a direct current power supply and providing the direct current power supply to a bus having a current; operating the motor in a forward direction; measuring a first bus current value being provided to the motor in the forward direction; operating the motor in a reverse direction if the first bus current value is greater than a bus current upper limit setting; measuring a second bus current value being provided to the motor in the reverse direction; generating a fault condition code if the second bus current value is greater than the bus current upper limit setting; shutting down a drive to the motor in order to stop the pump when the second bus current value is greater than the bus current upper limit setting; providing the direct current power supply to the bus when the drive is shut down; and operating the motor in the forward direction if the second bus current value is less than the bus current upper limit setting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of detecting a fault condition in a pump control system having a motor connected to a pump, a controller, and a variable speed drive, the method comprising:
receiving an alternating current power supply at the controller, the controller; converting the alternating current power supply to a direct current power supply and providing the direct current power supply to a bus having a current; operating the motor in a forward direction through the variable speed drive; measuring a first bus current value being provided to the motor in the forward direction through the variable speed drive; operating the motor in a reverse direction through the variable speed drive if the first bus current value is greater than a bus current upper limit setting; measuring a second bus current value being provided to the motor in the reverse direction through the variable speed drive; generating a fault condition code if the second bus current value is greater than the bus current upper limit setting; shutting down the variable speed drive to the motor when the second bus current value is greater than the bus current upper limit setting; maintaining the direct current power supply to the bus when the variable speed drive is shut down; and operating the motor in the forward direction through the variable speed drive if the second bus current value is less than the bus current upper limit setting. - View Dependent Claims (15, 16)
Specification