MEDICAL FLUID MACHINE HAVING SOLENOID CONTROL SYSTEM WITH REDUCED HOLD CURRENT
First Claim
1. An electromechanical solenoid control system comprising:
- an electromechanical solenoid including an armature and a coil;
a voltage source;
a resistor placed in an electrical line between the voltage source and the solenoid coil;
a switching device configured to selectively apply power from the voltage source to the solenoid coil; and
a control element connected electrically to the switching device, the control element operable to receive a signal from the electrical line and use the signal to control the switching device to selectively apply power from the voltage source to the solenoid coil.
3 Assignments
0 Petitions
Accused Products
Abstract
An electromechanical solenoid control system with reduced hold current includes an electromechanical solenoid including an armature and a coil; a voltage source; a resistor placed in an electrical line between the voltage source and the solenoid coil; a switching device configured to selectively apply power from the voltage source to the solenoid coil; and a control element connected electrically to the switching device, the control element operable to receive a signal from the electrical line and use the signal to control the switching device to selectively apply power from the voltage source to the solenoid coil.
44 Citations
26 Claims
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1. An electromechanical solenoid control system comprising:
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an electromechanical solenoid including an armature and a coil; a voltage source; a resistor placed in an electrical line between the voltage source and the solenoid coil; a switching device configured to selectively apply power from the voltage source to the solenoid coil; and a control element connected electrically to the switching device, the control element operable to receive a signal from the electrical line and use the signal to control the switching device to selectively apply power from the voltage source to the solenoid coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electromechanical solenoid control system comprising:
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an electromechanical solenoid including an armature and a coil; a power source configured to power the coil; and a control element configured to control power from the power supply to the coil, the control element receiving a signal from an electrical point between the power supply and the coil, the signal changing in a characteristic fashion when the armature upon activation begins to move or is moving within the coil, the control element configured to sense this characteristic change and to thereafter reduce power from the power source to the coil. - View Dependent Claims (16, 17, 18)
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19. An electromechanical solenoid control system comprising:
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an electromechanical solenoid including an armature and a coil; a power source configured to power the coil; and a control element configuration to control power from the power supply to the coil, the control element receiving a signal from an electrical point between the power supply and the coil, the signal changing in a characteristic fashion when the armature upon release begins to move or is moving within the coil, the control element configured to sense the characteristic change and store the current level at which the change occurred. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An electromechanical solenoid control method comprising:
updating an electrical current release level to be an electrical current level at which an armature of a solenoid was previously released from actuation and setting an electrical current hold level for the solenoid to be the updated electrical current release level plus an increment. - View Dependent Claims (26)
Specification