US20030208840A1 - Variable speed electrical motor without centrifugal switch - Google Patents
Variable speed electrical motor without centrifugal switch Download PDFInfo
- Publication number
- US20030208840A1 US20030208840A1 US10/142,397 US14239702A US2003208840A1 US 20030208840 A1 US20030208840 A1 US 20030208840A1 US 14239702 A US14239702 A US 14239702A US 2003208840 A1 US2003208840 A1 US 2003208840A1
- Authority
- US
- United States
- Prior art keywords
- water
- switch
- motor
- combination
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
Definitions
- Variable speed AC induction electrical motors are very popular for a wide range of uses.
- the switch mechanism which provides the motor with the capability of switching between two or more speeds is disposed on the rotating rotor portion of the motor, within the motor housing.
- Such switch mechanisms necessarily rotate as the rotor rotates.
- some sort of brush and ring configuration must be provided.
- variable speed electrical motors The problem with such variable speed electrical motors is that the switching mechanism frequently fails. Also, the brush and ring configuration is prone to failure. In both cases, repair of the motor is awkward, time-consuming and expensive.
- the invention satisfies this need.
- the invention is a combination comprising (a) a variable speed electrical AC induction motor, having windings and a rotor disposed within a motor housing, and (b) a switch for varying the speed of the motor, wherein the switch is disposed external of the motor housing.
- FIG. 1 is an isometric view of an electrical motor combination having features of the invention.
- the invention is an electrical motor combination 10 comprising a variable speed electrical AC induction motor 12 and a switch 14 for varying the speed of the motor 12 .
- the electrical motor 12 has windings and a rotor (not shown) disposed within a motor housing 16 . Contrary to electrical AC induction motors of the prior art, the electrical motor 12 of the invention 10 has no speed-varying switch disposed within the motor housing 16 .
- the switch 14 for varying the speed of the motor 12 is disposed external of the motor housing 16 .
- the switch 14 is typically disposed within a separate switch box 18 .
- the electrical motor combination of the invention 10 is ideal for use in a water recreational combination 20 such as a spa, hot tub or recirculation bath tub.
- a water recreational combination 20 such as a spa, hot tub or recirculation bath tub.
- Such a water recreational combination 20 is described in co-pending U.S. patent application Ser. No. ______, filed Mar. 14, 2002, entitled ADJUSTABLE WATER THERAPY COMBINATION, the entire contents of which are incorporated herein by this reference.
- FIG. 2 illustrates a typical portable spa 20 having a water basin 22 with side walls 24 .
- Water is circulated from the bottom of the water basin 22 through water circulation lines 25 , a centrifugal water pump 26 and back to the water basin 22 , typically via water injection jets (not shown).
- the variable speed AC induction motor 12 is used to drive the water pump 26 so that water entering the water basin 22 via the water injection jets can be varied with respect to intensity and pulse characteristics.
- Speed control of the electrical motor 12 is accomplished by the switch 14 which is disposed within a switch box 18 external of the electrical motor 12 .
- Main line operating power is wired to the switch box 18 via main power wires 28 .
- Electrical motor power is provided from the switch box 18 to the electrical motor 12 via electrical motor input wires 30 .
- the switch 14 within the switch box 18 controls the amount of main line power to the electrical motor 12 .
- Control of the switch 14 can be made via a control panel (not shown) which is operably attached to the switch 14 within the switch box 18 by control wires 32 .
- the pump 26 , water circulation lines 25 , electrical motor 12 and switch box 18 can be conveniently located within a spa surround 34 . Large doorways 36 within the spa surround 34 provide easy access to the pump 26 , motor 12 and switch box 18 for maintenance purposes.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
A variable speed electrical AC induction motor has windings and a rotor disposed within a motor housing. A switch for varying the speed of the rotor is disposed at a location external of the motor housing. The variable speed electrical AC induction motor is ideal for use in a water recreational combination, such as a spa, hot tub or recirculating bath tub. Because the AC induction motor has a switch which is external to the motor housing, repair or replacement of the switch is conveniently and easily accomplished without having to take apart the electrical motor.
Description
- Variable speed AC induction electrical motors are very popular for a wide range of uses. Typically, the switch mechanism which provides the motor with the capability of switching between two or more speeds is disposed on the rotating rotor portion of the motor, within the motor housing. Such switch mechanisms necessarily rotate as the rotor rotates. To connect the rotating switch to control wiring, some sort of brush and ring configuration must be provided.
- The problem with such variable speed electrical motors is that the switching mechanism frequently fails. Also, the brush and ring configuration is prone to failure. In both cases, repair of the motor is awkward, time-consuming and expensive.
- Accordingly, there is a need for a variable speed electrical motor which avoids this problem in the prior art.
- The invention satisfies this need. The invention is a combination comprising (a) a variable speed electrical AC induction motor, having windings and a rotor disposed within a motor housing, and (b) a switch for varying the speed of the motor, wherein the switch is disposed external of the motor housing.
- These and other features, aspects and advantages of the present invention will become better understood with reference to the following description, appended claims and accompanying drawings where:
- FIG. 1 is an isometric view of an electrical motor combination having features of the invention; and
- FIG. 2 is a side view of a water recreational combination employing the electrical motor combination illustrated in FIG. 1.
- The following discussion describes in detail one embodiment of the invention and several variations of that embodiment. This discussion should not be construed, however, as limiting the invention to those particular embodiments. Practitioners skilled in the art will recognize numerous other embodiments as well.
- The invention is an
electrical motor combination 10 comprising a variable speed electricalAC induction motor 12 and aswitch 14 for varying the speed of themotor 12. - The
electrical motor 12 has windings and a rotor (not shown) disposed within amotor housing 16. Contrary to electrical AC induction motors of the prior art, theelectrical motor 12 of theinvention 10 has no speed-varying switch disposed within themotor housing 16. Theswitch 14 for varying the speed of themotor 12 is disposed external of themotor housing 16. Theswitch 14 is typically disposed within aseparate switch box 18. - The electrical motor combination of the
invention 10 is ideal for use in a waterrecreational combination 20 such as a spa, hot tub or recirculation bath tub. Such a waterrecreational combination 20 is described in co-pending U.S. patent application Ser. No. ______, filed Mar. 14, 2002, entitled ADJUSTABLE WATER THERAPY COMBINATION, the entire contents of which are incorporated herein by this reference. - FIG. 2 illustrates a typical
portable spa 20 having awater basin 22 withside walls 24. Water is circulated from the bottom of thewater basin 22 throughwater circulation lines 25, acentrifugal water pump 26 and back to thewater basin 22, typically via water injection jets (not shown). The variable speedAC induction motor 12 is used to drive thewater pump 26 so that water entering thewater basin 22 via the water injection jets can be varied with respect to intensity and pulse characteristics. Speed control of theelectrical motor 12 is accomplished by theswitch 14 which is disposed within aswitch box 18 external of theelectrical motor 12. Main line operating power is wired to theswitch box 18 viamain power wires 28. Electrical motor power is provided from theswitch box 18 to theelectrical motor 12 via electricalmotor input wires 30. Theswitch 14 within theswitch box 18 controls the amount of main line power to theelectrical motor 12. Control of theswitch 14 can be made via a control panel (not shown) which is operably attached to theswitch 14 within theswitch box 18 bycontrol wires 32. As illustrated in FIG. 2, thepump 26,water circulation lines 25,electrical motor 12 andswitch box 18 can be conveniently located within aspa surround 34.Large doorways 36 within thespa surround 34 provide easy access to thepump 26,motor 12 andswitch box 18 for maintenance purposes. - As can be readily appreciated, maintenance on or replacement of the
switch 14 is easily accomplished within the invention because theelectrical motor 12 does not have to be opened to obtain access to theswitch 14. Rather, theswitch 14 is easily accessed by simply opening theswitch box 18. - Having thus described the invention, it should be apparent that numerous structural modifications and adaptations may be resorted to without departing from the scope and fair meaning of the instant invention as set forth hereinabove and as described hereinbelow by the claims.
Claims (5)
1. An electrical motor combination comprising:
(a) a variable speed electrical AC induction motor, having a motor housing; and
(b) a switch for varying the speed of the motor, wherein the switch is disposed external of the motor housing.
2. The electrical motor combination of claim 1 wherein the switch is disposed within a separate switch box.
3. The electrical motor combination of claim 1 wherein the combination is disposed within a water recreational combination, the water recreational combination comprising:
(a) a water basin capable of retaining a human being partially submerged below a quantity of water;
(b) a water pump having a suction side and a discharged side; and
(c) water circulation conduits connecting the water basin to the suction side of the pump and connecting the discharge side of the pump to the water basin;
wherein the electrical motor drives the water pump.
4. A water recreational combination comprising:
(a) a water basin capable of retaining a human being partially submerged below a quantity of water;
(b) a water pump having a suction side and a discharged side;
(c) water circulation conduits connecting the water basin to the suction side of the pump and connecting the discharge side of the pump to the water basin;
(d) a variable speed electrical AC induction motor for driving the water pump; and
(e) a switch for varying the speed of the rotor, wherein the switch is disposed external of the motor housing in a separate switch box.
5. The water recreational combination of claim 4 wherein the water basin, the pump, the electrical motor and the switch box are enclosed within a spa surround.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/142,397 US20030208840A1 (en) | 2002-05-08 | 2002-05-08 | Variable speed electrical motor without centrifugal switch |
CA002428394A CA2428394A1 (en) | 2002-05-08 | 2003-05-08 | Variable speed electrical motor without centrifugal switch |
US10/763,605 US20040205887A1 (en) | 2002-05-08 | 2004-01-22 | Variable speed electrical motor with separate start windings and without centrifugal switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/142,397 US20030208840A1 (en) | 2002-05-08 | 2002-05-08 | Variable speed electrical motor without centrifugal switch |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/763,605 Continuation-In-Part US20040205887A1 (en) | 2002-05-08 | 2004-01-22 | Variable speed electrical motor with separate start windings and without centrifugal switch |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030208840A1 true US20030208840A1 (en) | 2003-11-13 |
Family
ID=29399890
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/142,397 Abandoned US20030208840A1 (en) | 2002-05-08 | 2002-05-08 | Variable speed electrical motor without centrifugal switch |
US10/763,605 Abandoned US20040205887A1 (en) | 2002-05-08 | 2004-01-22 | Variable speed electrical motor with separate start windings and without centrifugal switch |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/763,605 Abandoned US20040205887A1 (en) | 2002-05-08 | 2004-01-22 | Variable speed electrical motor with separate start windings and without centrifugal switch |
Country Status (2)
Country | Link |
---|---|
US (2) | US20030208840A1 (en) |
CA (1) | CA2428394A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100131083A1 (en) * | 2008-11-25 | 2010-05-27 | Thaylen Leany | Systems and methods for controlling operation of a motor |
US10410190B1 (en) * | 2018-07-31 | 2019-09-10 | Morgan Stanley Services Group Inc. | Network of computing nodes and a method of operating the computing nodes to effectuate real-time bank account-to-bank account money transfer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5356161B2 (en) * | 2009-09-04 | 2013-12-04 | 株式会社マキタ | Shifting switch |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6346790B1 (en) * | 2000-04-12 | 2002-02-12 | Emerson Electric Co. | Induction motor system with an induction motor and an electrically isolated voltage modulation motor controller |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1082989A (en) * | 1913-05-21 | 1913-12-30 | John Baxter | Closure for milk-jars and the like. |
US1743772A (en) * | 1926-07-02 | 1930-01-14 | Gen Electric | Multispeed motor control system |
USRE24499E (en) * | 1955-11-17 | 1958-07-08 | chang | |
US4066937A (en) * | 1976-01-13 | 1978-01-03 | Lennox Industries, Inc. | Control circuit for a two speed single phase motor |
US4082989A (en) * | 1976-01-13 | 1978-04-04 | Lennox Ind Inc | Switching contactor circuit for five-lead two-speed single-phase motor |
US4100917A (en) * | 1976-10-18 | 1978-07-18 | Dazey Products Co. | Hydrotherapy unit |
US4263540A (en) * | 1979-07-05 | 1981-04-21 | General Electric Company | Two-speed refrigerant motor compressor |
US4348626A (en) * | 1980-09-16 | 1982-09-07 | General Electric Company | Two-speed single phase motor with centrifugal switch |
GB2084821B (en) * | 1980-09-26 | 1985-04-03 | Nat Res Dev | Variable-speed electrical machines |
US4382218A (en) * | 1982-06-30 | 1983-05-03 | Stratford Manufacturing, Inc. | Speed control for fan motor |
US4453118A (en) * | 1982-11-08 | 1984-06-05 | Century Electric, Inc. | Starting control circuit for a multispeed A.C. motor |
JPS6062871U (en) * | 1983-09-30 | 1985-05-02 | 株式会社荏原製作所 | Capacitor-starting capacitor-operated dry submersible single-phase induction motor |
JPH039709Y2 (en) * | 1985-07-23 | 1991-03-11 | ||
DE3800401C3 (en) * | 1987-09-16 | 1995-09-07 | Kaldewei Franz Gmbh & Co | Whirlpool bath |
US5227710A (en) * | 1989-12-28 | 1993-07-13 | The Alexander J. Lewus Revocable Inter Vivos (Living) Trust | Multiple speed single phase motor |
US5300871A (en) * | 1992-08-21 | 1994-04-05 | Chien Luen Industries Company, Ltd., Inc. | Dual capacitor speed control apparatus and method for electric motor |
US5548854A (en) * | 1993-08-16 | 1996-08-27 | Kohler Co. | Hydro-massage tub control system |
US5514943A (en) * | 1994-07-18 | 1996-05-07 | Carrier Corporation | Multi-speed motor control system |
US5686806A (en) * | 1994-12-19 | 1997-11-11 | Trans-Coil, Inc. | Low-pass filter and electronic speed control system for electric motors |
US6295662B1 (en) * | 1996-11-22 | 2001-10-02 | Softub, Inc. | Porous solenoid structure |
US6078154A (en) * | 1999-02-12 | 2000-06-20 | Delco Electronics Corporation | Circuitry for determining actuator position |
US6189171B1 (en) * | 1999-03-16 | 2001-02-20 | General Electric Company | Washing machine having a variable speed motor |
US6289530B1 (en) * | 1999-04-14 | 2001-09-18 | Mr. Tubs, Inc. | Jetted laundry/utility/kitchen sink |
US6121746A (en) * | 1999-06-10 | 2000-09-19 | General Electric Company | Speed reduction switch |
US6396674B1 (en) * | 2000-04-11 | 2002-05-28 | Ford Global Technologies, Inc. | System and method for monitoring the operation of a power converter |
US6412123B1 (en) * | 2000-11-01 | 2002-07-02 | Pleasure Time Products (Hong Kong) Limited | Portable spa |
FR2841404B1 (en) * | 2002-06-25 | 2004-11-19 | Gerald Claude Goche | LOW CONSUMPTION SINGLE-PHASE OR THREE-PHASE ALTERNATIVE ELECTRIC MOTOR AND HIGH-PERFORMANCE ASYNCHRONOUS GENERATOR AND RELATED WINDING METHOD |
US7045979B2 (en) * | 2003-02-28 | 2006-05-16 | A.O. Smith Corporation | Multiple-speed electric machine and method of operating the same |
US6933638B2 (en) * | 2003-10-30 | 2005-08-23 | A. O. Smith Corporation | Electric motor having a reverse air flow cooling system |
-
2002
- 2002-05-08 US US10/142,397 patent/US20030208840A1/en not_active Abandoned
-
2003
- 2003-05-08 CA CA002428394A patent/CA2428394A1/en not_active Abandoned
-
2004
- 2004-01-22 US US10/763,605 patent/US20040205887A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6346790B1 (en) * | 2000-04-12 | 2002-02-12 | Emerson Electric Co. | Induction motor system with an induction motor and an electrically isolated voltage modulation motor controller |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100131083A1 (en) * | 2008-11-25 | 2010-05-27 | Thaylen Leany | Systems and methods for controlling operation of a motor |
US10410190B1 (en) * | 2018-07-31 | 2019-09-10 | Morgan Stanley Services Group Inc. | Network of computing nodes and a method of operating the computing nodes to effectuate real-time bank account-to-bank account money transfer |
Also Published As
Publication number | Publication date |
---|---|
CA2428394A1 (en) | 2003-11-08 |
US20040205887A1 (en) | 2004-10-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CALIFORNIA ACRYLIC INDUSTRIES, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VARGAS, PEDRO;REEL/FRAME:012889/0812 Effective date: 20020426 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |