US5578911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for power regeneration in an electric vehicle motor drive using a deadtime generator and having continuously variable regeneration control
Assignee: FCA US LLC
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Filing: 1994-09-21
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Granted: 1996-11-26
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Expires: 2014-09-21
Abstract
Abstract A motor control circuit is disclosed for providing a continuously variable regeneration control. The control circuit includes a microcomputer for generating a power regeneration command signal and a motor command signal, and an armature circuit for use with DC and induction motors. The armature circuit is responsive to the motor command signal for operating the controlled motor in a motor drive mode. The armature circuit is further responsive to the power regeneration command signal for controlling the degree of power regeneration. The armature circuit includes a deadtime generator, responsive to the motor command signal for generating a pair of complementary motor drive signals, the inverted signal of the pair having deadtime. The inverted motor drive signal with deadtime is AND'ed with the power regeneration command signal to produce a power regeneration drive signal. The non-inverted motor drive signal and the power regeneration drive signal are applied to a Class C two-quadrant chopper drive circuit. The chopper circuit alternately and in accordance with these drive signals respectively energizes the motor (motor drive mode) and causes the motor to recharge the battery (power regeneration mode).
Inventors
- 👤 James C. Carter
- 👤 Joseph F. Impullitti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:19
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/10; B60L7/16; B60L2260/00; B60L2260/20; B60L2260/30
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
119 words
A control apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means for generating a motor command signal; deadtime generator means responsive to said motor command signal for generating an inverted motor drive signal having deadtime; and, motor drive means energizable by a power source and coupled to said inverted motor drive signal having deadtime for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to the power source, said motor drive means being further coupled to said motor command signal for causing the motor to operate in a motoring mode wherein power from the power source is delivered to the motor to operate the motor.
Claim 2
Dependent Claim
119 words
A control apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means for generating a motor command signal; deadtime generator means responsive to said motor command signal for generating an inverted motor drive signal having deadtime; and, motor drive means energizable by a power source and coupled to said inverted motor drive signal having deadtime for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to the power source, said motor drive means being further coupled to said motor command signal for causing the motor to operate in a motoring mode wherein power from the power source is delivered to the motor to operate the motor.
Claim 3
Dependent Claim
69 words
The control apparatus of claim 1 wherein said control means is responsive to a plurality of operating parameter signals for generating a regeneration command signal, said apparatus further comprising logic means responsive to said regeneration command signal and said inverted motor drive signal for generating a regeneration drive signal, said motor drive means being responsive to said regeneration drive signal to operate the motor in the power regeneration mode.
Claim 4
Dependent Claim
40 words
The control apparatus of claim 2 wherein said control means generates said regeneration command signal such that a torque braking effect imparted by the motor when operating in the power regeneration mode is substantially equivalent to an internal combustion engine.
Claim 5
Dependent Claim
13 words
The control apparatus of claim 2 wherein the regeneration drive signal is variable.
Claim 6
Dependent Claim
19 words
The control apparatus of claim 2 wherein the regeneration drive signal is variable independent of motor command duty cycle.
Claim 7
Dependent Claim
66 words
The control apparatus of claim 1 wherein the motor drive means includes a pair of semiconductor switches, a first one of said switches being responsive to said regeneration drive signal to become closed for operating the motor in the power regeneration mode, a second one of said switches being responsive to said motor drive signal to become closed for operating the motor in the motoring mode.
Claim 8
Dependent Claim
36 words
The control apparatus of claim 1 wherein the motor is a three-phase induction motor, and wherein each phase of operation of the motor includes at least one deadtime generator and at least one motor drive means.
Claim 9
Dependent Claim
57 words
In an electric vehicle motor drive system, a method of motor control, comprising the steps of: (A) generating a motor drive signal; (B) inverting the motor drive signal; (C) injecting a preselected deadtime into the inverted motor drive signal; and, (D) operating the motor in a power regeneration mode using the inverted motor drive signal having deadtime.
Claim 10
Dependent Claim
57 words
In an electric vehicle motor drive system, a method of motor control, comprising the steps of: (A) generating a motor drive signal; (B) inverting the motor drive signal; (C) injecting a preselected deadtime into the inverted motor drive signal; and, (D) operating the motor in a power regeneration mode using the inverted motor drive signal having deadtime.
Claim 11
Dependent Claim
31 words
The method of claim 8 wherein the motor drive signal is of the type having a duty cycle, the duty cycle being determined as a function of a desired motor speed.
Claim 12
Dependent Claim
11 words
The method of claim 8 wherein the preselected deadtime is fixed.
Claim 13
Dependent Claim
11 words
The method of claim 8 wherein the preselected deadtime is variable.
Claim 14
Dependent Claim
77 words
The method of claim 8 further comprising the step of generating a regeneration command signal, and wherein the system includes a motor drive circuit for operating the motor in the power regeneration mode, step (D) including the substeps of: producing a regeneration drive signal using the regeneration command signal and the inverted motor drive signal having deadtime; and, applying the regeneration drive signal to the motor drive circuit to operate the motor in the power regeneration mode.
Claim 15
Dependent Claim
12 words
The method of claim 12 wherein the regeneration drive signal is variable.
Claim 16
Dependent Claim
19 words
The method of claim 12 wherein the regeneration drive signal is variable independent of a motor command duty cycle.
Claim 17
Dependent Claim
71 words
The method of claim 12 wherein the regeneration command signal generating step includes the substeps of: detecting a plurality of operating parameters and generating a respective plurality of operating parameter signals indicative of the parameter detected; generating the regeneration command signal using the operating parameter signals such that a torque braking effect imparted by the motor when operating in a power regeneration mode is substantially equivalent to an internal combustion engine.
Claim 18
Independent Claim
127 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: a computer coupled to a plurality of operating parameter signals for generating a motor command signal; a deadtime generator connected to said motor command signal for generating an inverted motor drive signal having deadtime; and, a motor drive circuit energizable by a power source and coupled to said inverted motor drive signal having deadtime for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to the power source, said motor drive circuit being further coupled to said motor command signal for causing the motor to operate in a motoring mode wherein power from the power source is delivered to the motor to operate the motor.
Claim 19
Independent Claim
127 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: a computer coupled to a plurality of operating parameter signals for generating a motor command signal; a deadtime generator connected to said motor command signal for generating an inverted motor drive signal having deadtime; and, a motor drive circuit energizable by a power source and coupled to said inverted motor drive signal having deadtime for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to the power source, said motor drive circuit being further coupled to said motor command signal for causing the motor to operate in a motoring mode wherein power from the power source is delivered to the motor to operate the motor.
Claim 20
Dependent Claim
59 words
The apparatus of claim 16 wherein said computer further generates a regeneration command signal, said apparatus further comprising a logic circuit coupled to said regeneration command signal and said inverted motor drive signal for generating a regeneration drive signal, said motor drive circuit being coupled to said regeneration drive signal to operate the motor in the power regeneration mode.
Claim 21
Dependent Claim
12 words
The apparatus of claim 17 wherein the regeneration drive signal is variable.
Claim 22
Dependent Claim
18 words
The apparatus of claim 17 wherein the regeneration drive signal is independent of a motor command duty cycle.
Claim 23
Independent Claim
127 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means responsive to a plurality of operating parameter indicative signals for generating motor command and power regeneration command signals; deadtime generator means responsive to said motor command signal for generating a motor drive signal and an inverted motor drive signal having deadtime; means responsive to said power regeneration command signal, said motor drive signal, and said inverted motor drive signal for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to a power source; and said control means having means for generating said motor command and regeneration command signals so that the motor operates in a power regeneration mode while the vehicle is coasting.
Claim 24
Independent Claim
127 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means responsive to a plurality of operating parameter indicative signals for generating motor command and power regeneration command signals; deadtime generator means responsive to said motor command signal for generating a motor drive signal and an inverted motor drive signal having deadtime; means responsive to said power regeneration command signal, said motor drive signal, and said inverted motor drive signal for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to a power source; and said control means having means for generating said motor command and regeneration command signals so that the motor operates in a power regeneration mode while the vehicle is coasting.
Claim 25
Independent Claim
133 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means responsive to a plurality of operating parameter indicative signals for generating motor command and power regeneration command signals; deadtime generator means responsive to said motor command signal for generating a motor drive signal and an inverted motor drive signal having deadtime; and means responsive to said power regeneration command signal, said motor drive signal, and said inverted motor drive signal for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to a power source; and said control means having means for generating said motor command and regeneration command signal so that the motor, when operating in a power regeneration mode, duplicates the reflected torque of an internal combustion engine.
Claim 26
Independent Claim
133 words
An apparatus for controlling a motor adapted to drive an electric vehicle, comprising: control means responsive to a plurality of operating parameter indicative signals for generating motor command and power regeneration command signals; deadtime generator means responsive to said motor command signal for generating a motor drive signal and an inverted motor drive signal having deadtime; and means responsive to said power regeneration command signal, said motor drive signal, and said inverted motor drive signal for causing the motor to operate in a power regeneration mode wherein power generated by the motor is delivered to a power source; and said control means having means for generating said motor command and regeneration command signal so that the motor, when operating in a power regeneration mode, duplicates the reflected torque of an internal combustion engine.
References Cited (Backward Citations)
US3840790A
Cited
US4051418A
Cited
US4371824A
Cited
US4454573A
Cited
US4520300A
Cited
US4697131A
Cited
US4710686A
Cited
US4901366A
Cited
US5210475A
Cited
US5210475B1
Cited
US4988939A
Cited
US5086261A
Cited
US5225758A
Cited
US5253724A
Cited
US5319291A
Cited
US5436540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |