Power supply compensation for an actuator
First Claim
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1. A power compensator for an actuator of a heating, ventilation and air conditioning system (HVAC), comprising:
- a first source of voltage;
a second source of voltage;
an operational amplifier; and
wherein;
the first source comprises a waveform generator;
the second source of voltage comprises a calculation circuit for power to an actuator;
an output of the first source of voltage is connected to a non-inverting input of the operational amplifier;
an output of the second source of voltage is connected to an inverting input of the operational amplifier;
an output of the operational amplifier is a third source of voltage that goes to the actuator;
an output of the third source of voltage maintains a constant speed or torque of the actuator; and
an output of the second source of voltage provides a signal that has an amplitude incorporating compensation in the output of the operational amplifier, for temperature of the actuator and a voltage of a power supply for the actuator.
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Abstract
A mechanism for compensating power to a motor or actuator. Compensation may counter the effects of changing voltage levels of power to the motor and varying temperatures at the motor. An output of a wave generator may be input to a comparator along with a level of voltage representing the temperatures and voltage levels. An output may be a power signal for driving the motor at a constant speed and/or torque which can increase a maintenance-free lifetime of the motor and actuator.
153 Citations
17 Claims
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1. A power compensator for an actuator of a heating, ventilation and air conditioning system (HVAC), comprising:
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a first source of voltage; a second source of voltage; an operational amplifier; and wherein; the first source comprises a waveform generator; the second source of voltage comprises a calculation circuit for power to an actuator; an output of the first source of voltage is connected to a non-inverting input of the operational amplifier; an output of the second source of voltage is connected to an inverting input of the operational amplifier; an output of the operational amplifier is a third source of voltage that goes to the actuator; an output of the third source of voltage maintains a constant speed or torque of the actuator; and an output of the second source of voltage provides a signal that has an amplitude incorporating compensation in the output of the operational amplifier, for temperature of the actuator and a voltage of a power supply for the actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for actuator speed control, comprising:
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a variable amplitude wave generator; a power calculation circuit; and a comparator having a first input connected to an output of the variable amplitude wave generator, a second input connected to an output of the power calculation circuit, and an output for connection to a motor of an actuator; and wherein the power calculation circuit comprises; a temperature sensitive component; and a voltage sensitive component; and wherein; the temperature sensitive component detects a temperature of the motor; the voltage sensitive component detects a voltage of a power supply for the motor; and the output of the comparator provides a compensated waveform of power for the motor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification