MEDICAL FLUID MACHINE HAVING SOLENOID CONTROL SYSTEM WITH TEMPERATURE COMPENSATION
First Claim
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1. An electromechanical solenoid control system comprising:
- an electromechanical solenoid including an armature and a coil;
a voltage source;
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 and operable to receive at least one signal indicative of a resistance of the coil and use the signal to control the switching device to selectively apply power from the voltage source to the solenoid coil.
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Abstract
A medical fluid machine having a solenoid control system with temperature compensation includes an electromechanical solenoid including an armature and a coil, a voltage source, 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 and operable to receive at least one signal indicative of a resistance of the coil and using the signal to control the switching device to selectively apply power from the voltage source to the solenoid coil.
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Citations
21 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 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 and operable to receive at least one signal indicative of a resistance of the coil 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;
(i) determine a coil resistance from a coil voltage drop and a coil electrical current;
(ii) determine a coil temperature from the coil resistance; and
(iii) adjust power from the power supply to the coil using the coil temperature. - View Dependent Claims (16, 17, 18, 19)
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20. An electromechanical solenoid control system comprising:
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a power supply; an electromechanical solenoid including an armature and a coil; a control element configured to (i) determine a temperature of the coil and (ii) raise power from the power supply to the coil to compensate for an inefficiency caused when the coil temperature is higher. - View Dependent Claims (21)
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Specification