Pump system including a variable frequency drive controller

a variable frequency drive and controller technology, applied in the field of pump systems, can solve problems such as system extended operation and undesirable periods of tim

Inactive Publication Date: 2009-04-02
LIQUIDYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]In various embodiments, the present invention provides a pump system generally comprising an electrical connector operable to couple with an electric circuit to receive electricity, an electric motor operable to actuate a pump to pump a fluid, and a variable frequency drive (VFD...

Problems solved by technology

Utilization of low flow rates forces these systems...

Method used

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  • Pump system including a variable frequency drive controller
  • Pump system including a variable frequency drive controller
  • Pump system including a variable frequency drive controller

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Embodiment Construction

[0014]The following detailed description of various embodiments of the invention references the accompanying drawings which illustrate specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense. The scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled.

[0015]Referring initially to FIG. 1, various embodiments of the present invention provide a pump system 10 configured for pumping a fluid. For example, the pump system 10 may be operable to transfer the fluid from one container, such as a drum D, to another container, such as a holding tank T. Wh...

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Abstract

A pump system generally comprising an electrical connector operable to couple with an electric circuit to receive electricity, an electric motor operable to actuate a pump to pump a fluid, and a variable frequency drive (VFD) controller. The VFD controller is operable to control the rotational speed of the electric motor by providing a variable frequency signal to the electric motor to prevent the current utilized by the electric motor from exceeding a maximum current level associated with the electric circuit.

Description

BACKGROUND[0001]1. Field[0002]Embodiments of the present invention relate to pump systems. More particularly, various embodiments of the invention provide a pump system including a variable frequency drive controller.[0003]2. Description of the Related Art[0004]Pump systems are often used to transfer and / or filter fluids and lubricants. For example, lubricant pump systems may be used to transfer a lubricant from a supplier's delivery container into a customer's storage tank. Due to temperature changes and the wide range of viscosities presented by commonly-used lubricants, electric lubricant pump systems often must operate at low and fixed flow rates to keep motor loads under available circuit limits. Utilization of low flow rates forces these systems to operate for extended and undesirable periods of time. Air operated lubricant pumps have been developed to more rapidly pump lubricants having variable viscosities. However, it is often desirable to utilize electric lubricant pumping...

Claims

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Application Information

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IPC IPC(8): F04B49/06
CPCF04B49/065
Inventor RUSSOLD, FRANKMCCLATCHY, MARK A.
Owner LIQUIDYNAMICS
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