US4733146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy recovery system for cyclic drives
Assignee: Reliance Electric Co
•
Filing: 1986-12-15
•
Granted: 1988-03-22
•
Expires: 2006-12-15
Abstract
Abstract A system is disclosed for recovering and storing the energy generated by an electrical motor during deceleration so as to be available for use when the motor is subsequently accelerated. The system utilizes a capacitor for storing the energy produced by voltage regeneration of the motor when decelerating. A two-quadrant regulator, connected between a three-phase rectifier and a four-quadrant SCR regulator, controls the charging and discharging of the capacitor so that the energy stored therein is proportional to the energy required to accelerate the motor and load to the maximum rotational velocity required.
Inventors
- 👤 Russell S. Hamby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:07
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/20; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/91; Y10S388/915; Y10S388/916; Y10S388/917
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
175 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith.
Claim 2
Independent Claim
175 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith.
Claim 3
Dependent Claim
33 words
The system as defined in claim 1 wherein said capacitance means is capable of storing electrical energy equal to the total maximum rotational kinetic energy of the motor and any load associated therewith.
Claim 4
Independent Claim
240 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said energy transfer allowing means.
Claim 5
Independent Claim
240 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said energy transfer allowing means.
Claim 6
Independent Claim
278 words
A system for recovering the electrical energy produced by an electric motor during deceleration or reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, said reference voltage being proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said energy transfer allowing means.
Claim 7
Independent Claim
278 words
A system for recovering the electrical energy produced by an electric motor during deceleration or reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, said reference voltage being proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said energy transfer allowing means.
Claim 8
Independent Claim
221 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith.
Claim 9
Independent Claim
221 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith.
Claim 10
Independent Claim
284 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said switching means.
Claim 11
Independent Claim
284 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said switching means.
Claim 12
Independent Claim
320 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, said reference voltage being proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said switching means.
Claim 13
Independent Claim
320 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the instantaneous rotational kinetic energy of the motor and any load associated therewith, means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said energy transfer allowing means comprising switching means which allows said capacitance means to receive the electrical energy produced by the motor during deceleration and permits the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor, said switching means having a duty cycle that is varied causing the instantaneous terminal voltage of said capacitance means to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, means for producing a reference voltage for said capacitance means, said reference voltage being proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for comparing said reference voltage to said instantaneous terminal voltage of said capacitance means, said comparing means producing an output signal representative of the difference between said reference voltage and said instantaneous terminal voltage of said capacitance means, said output signal being utilized to control said duty cycle of said switching means.
Claim 14
Independent Claim
145 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, an inductance and a resistance electrically connected to said capacitance means, said inductance, resistance and capacitance means having electrical properties approximating the electrical properties of the motor, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor.
Claim 15
Independent Claim
145 words
A system for recovering the electrical energy produced by an electric motor during deceleration for reuse during subsequent acceleration of the motor comprising capacitance means for storing the electrical energy produced by the electric motor during deceleration, an inductance and a resistance electrically connected to said capacitance means, said inductance, resistance and capacitance means having electrical properties approximating the electrical properties of the motor, means for controlling the charging and discharging of said capacitance means permitting the amount of electrical energy stored therein to be proportional to the difference between the total maximum rotational kinetic energy of the motor and any load associated therewith and the total instantaneous rotational kinetic energy of the motor and any load associated therewith, and means for allowing the transfer of said electrical energy from said capacitance means to the motor for reuse during the subsequent acceleration of the motor.
References Cited (Backward Citations)
US3427520A
Cited
US3538404A
Cited
US3475669A
Cited
US3612973A
Cited
US3579065A
Cited
US3661428A
Cited
US3630304A
Cited
US3601683A
Cited
US3660738A
Cited
US3728599A
Cited
US4066940A
Cited
US3863123A
Cited
US3940669A
Cited
US3890551A
Cited
US4010407A
Cited
US4189668A
Cited
US4191914A
Cited
US4284938A
Cited
US4319177A
Cited
US4375612A
Cited
US4384240A
Cited
US4330742A
Cited
US4388573A
Cited
US4381479A
Cited
US4426610A
Cited
US4478315A
Cited
US4545464A
Cited
US4447868A
Cited
US4548299A
Cited
US4471277A
Cited
US4443744A
Cited
US4479080A
Cited
US4554999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |