PORTABLE MOTOR DRIVE SYSTEM

• US 20140265946A1
• Filed: 03/15/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Andrew John Bartlik, Jr., Charles Thomas Mclees
• Original Assignee: Jr., Charles Thomas Mclees
• Inventors: Bartlik, Andrew John, McLees, Charles Thomas Jr.
• Granted Patent: US 10,003,293 B2
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: H02P 23/0004 Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
• CPC Class Codes: H02P 27/04 using variable-frequency supply voltage, e.g. inverter or converter supply voltage

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.

Claims

1. A drive system comprising:

a user interface enabling a user to select an operating frequency set point and an operating voltage set point, the operating frequency set point being selected from a range of frequency set points and the operating voltage set point being selected from a range of voltage set points;

a variable speed drive configured to drive a motor at the selected operating frequency set point and selected operating voltage set point; and

a controller configured to receive input from the user interface and control the operating frequency and operating voltage of the variable speed drive.

2. The drive system of claim 1, wherein the controller is contained in the variable speed drive.

3. The drive system of claim 1, further comprising a memory configured to store the range of frequency set points and voltage set points.

4. The drive system of claim 3, wherein the user interface is further configured to enable a user to select a valve that is to be operated by the motor, and wherein the controller is further configured to retrieve the selected frequency set point and selected voltage set point from the memory based on the selected valve.

5. The drive system of claim 1, further comprising a portable housing configured to house the user interface, variable speed drive, and controller.

6. The drive system of claim 1, wherein the controller is further configured to monitor the output current of the variable speed drive.

7. The drive system of claim 1, wherein the controller is further configured to maintain the variable speed drive at the selected frequency set point and selected voltage set point until a forward stroke set point or reverse stroke set point is reached.

8. The drive system of claim 1, wherein the controller is further configured to control the variable speed drive in a hammer blow mode.

9. The drive system of claim 1, further comprising a power supply.

10. The drive system of claim 9, wherein the power supply is a single battery pack.

11. The drive system of claim 9, wherein the power supply includes a battery pack and at least one capacitor.

12. The drive system of claim 9, wherein the power supply includes a plurality of capacitors charged by a single battery pack.

13. A power supply comprising:

a battery;

a capacitor configured to be coupled to the battery during a charging mode, the capacitor configured to store a charge during the charging mode;

a pre-charge contact configured to switchably couple the battery to the capacitor during the charging mode; and

a capacitor switching contact configured to switchably couple the capacitor to a motor drive during a powering mode.

14. The power supply of claim 13, further comprising a resistor configured to be coupled with the battery and capacitor during the charging mode.

15. The power supply of claim 13, further comprising a current sensing device configured to be switchably coupled to the capacitor during the powering mode.

16. The power supply of claim 15, wherein the current sensing device is configured to switchably couple the capacitor to the motor drive when an increase in current is detected.

17. A power supply comprising:

a battery; and

a plurality of capacitors;

wherein the battery is configured to pre-charge the capacitors when the capacitors are in parallel; and

wherein the capacitors are configured to provide power to a motor drive when the capacitors are in series.

18. The power supply of claim 17, further comprising a first set of switches configured to connect the capacitors in parallel when the capacitors are pre-charged.

19. The power supply of claim 18, further comprising a second set of switches configured to connect the capacitors in series when the capacitors provide power to the motor drive.

20. The power supply of claim 17, wherein the power supply is contained within a housing configured to house a variable speed drive.

21. The power supply of claim 20, wherein the capacitors provide power to the motor drive as controlled by the variable speed drive.