Portable motor drive system
First Claim
1. A drive system for operating a valve, the drive system comprising:
- a controller;
a variable speed drive configured to drive a valve motor, the controller is configured to control the variable speed drive to selectively drive the valve motor at an operating frequency and an operating voltage to spin a rotor of the valve motor such that the rotor engages the valve to operate the valve;
wherein, the valve motor and valve are configured such that the rotor can spin from an unloaded position a predetermined number of degrees without engaging the valve, the unloaded position being a position where the rotor is not engaging the valve;
wherein, during a hammer blow mode, the controller selectively controls the variable speed drive to cause the rotor of the valve motor to spin in a first direction until a predetermined condition is satisfied and an unloaded position is achieved, and, after the predetermined condition is satisfied, the controller controls the variable speed drive to cause the rotor to accelerate in a second direction to create an impact when the rotor engages the valve and to start the valve moving; and
a power supply for providing power to the variable speed drive.
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Accused Products
Abstract
Systems and methods for driving a motor are provided. One implementation of a drive system comprises a user interface, a variable speed drive, and a controller. The user interface enables a user to select an operating frequency set point and an operating voltage set point. The operating frequency set point is selected from a range of frequency set points and the operating voltage set point is selected from a range of voltage set points. The variable speed drive is configured to drive a motor at the selected operating frequency set point and selected operating voltage set point. The controller is configured to receive input from the user interface and control the operating frequency and operating voltage of the variable speed drive.
48 Citations
20 Claims
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1. A drive system for operating a valve, the drive system comprising:
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a controller; a variable speed drive configured to drive a valve motor, the controller is configured to control the variable speed drive to selectively drive the valve motor at an operating frequency and an operating voltage to spin a rotor of the valve motor such that the rotor engages the valve to operate the valve; wherein, the valve motor and valve are configured such that the rotor can spin from an unloaded position a predetermined number of degrees without engaging the valve, the unloaded position being a position where the rotor is not engaging the valve; wherein, during a hammer blow mode, the controller selectively controls the variable speed drive to cause the rotor of the valve motor to spin in a first direction until a predetermined condition is satisfied and an unloaded position is achieved, and, after the predetermined condition is satisfied, the controller controls the variable speed drive to cause the rotor to accelerate in a second direction to create an impact when the rotor engages the valve and to start the valve moving; and a power supply for providing power to the variable speed drive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14, 15)
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9. A drive system for operating a valve, the drive system comprising:
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a controller; a variable speed drive configured to drive a valve motor, wherein the controller is configured to control the variable speed drive to drive the valve motor at an operating frequency and an operating voltage for operating the valve; a power supply including a battery and at least one capacitor, the controller configured to selectively control the battery and the at least one capacitor for supplying power to the variable speed drive, wherein the battery is configured to provide a first level of power, the first level of power being less than a second level of power required to operate the valve throughout a valve stroke, such that the weight of the power supply is reduced with respect to a second power supply including a second battery configured to provide the second level of power; and a portable housing, wherein the controller, the variable speed drive, and the power supply are disposed within the portable housing. - View Dependent Claims (10, 11, 12, 13, 16, 17, 18, 19)
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20. A drive system for operating a valve, the drive system comprising:
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a controller; a variable speed drive configured to drive a valve motor, the controller is configured to control the variable speed drive to selectively drive the valve motor at an operating frequency and an operating voltage to spin a set of ears of the valve motor such that the set of ears of the valve motor engage a set of ears of the valve for operating the valve; wherein, the valve motor and valve are configured such that the set of ears of the valve motor can spin from an unloaded position a predetermined number of degrees without engaging the set of ears of the valve, the unloaded position being a position where the set of ears of the valve motor are not engaging the set of ears of the valve; wherein, during a hammer blow mode, the controller selectively controls the variable speed drive to cause the set of ears of the valve motor to spin in a first direction until a predetermined condition is satisfied and an unloaded position is achieved, and, after the predetermined condition is satisfied, the controller controls the variable speed drive to cause the set of ears of the valve motor to accelerate in a forward direction until the set of ears of the valve motor impact the set of ears of the valve to start the valve moving; and a power supply for providing power to the variable speed drive.
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Specification