Hybrid drive system with regeneration for motor vehicles and the like
First Claim
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1. A hybrid drive system for a motor vehicle comprising:
- a. a storage battery for generating a battery current;
b. a dc electric motor receiving said battery current for applying primary motive power from said storage battery to said motor vehicle during an actuation mode, said electric motor converting the kinetic energy of said motor vehicle into electrical energy by dynamically generating a regenerative charging current during a braking mode;
c. switching means for selectively applying said battery current to said motor, and for selectively applying said regenerative charging current to said storage battery; and
d. electronic control means coupled to said switching means for directing said battery current from said storage battery to said vehicle in said actuation mode for moving said motor vehicle, and in said braking mode for applying dynamic braking to said motor vehicle;
wherein in said braking mode said control means applies a repetitive control signal to said switching means, said repetitive control signal alternating between a first value for a first period and a second value for a second period, wherein said regenerative charging current is repetitively built up during said first period during which said motor is isolated from said storage battery, said regenerative charging current being discharged through said storage battery during said second period thereby charging said storage battery.
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Abstract
A hybrid motor vehicle includes a storage battery providing motive power to an electric motor under the control of a microprocessor. A generator with an internal combustion engine may be used to charge the storage battery. The motor is operated either in an actuated mode in which current flows from the battery and a dynamic braking mode in which regenerated current flows from the motor to the battery. Electronic circuitry is used to insure that regenerative current is generated even if the motor Emf is lower than the voltage of the storage battery.
47 Citations
22 Claims
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1. A hybrid drive system for a motor vehicle comprising:
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a. a storage battery for generating a battery current; b. a dc electric motor receiving said battery current for applying primary motive power from said storage battery to said motor vehicle during an actuation mode, said electric motor converting the kinetic energy of said motor vehicle into electrical energy by dynamically generating a regenerative charging current during a braking mode; c. switching means for selectively applying said battery current to said motor, and for selectively applying said regenerative charging current to said storage battery; and d. electronic control means coupled to said switching means for directing said battery current from said storage battery to said vehicle in said actuation mode for moving said motor vehicle, and in said braking mode for applying dynamic braking to said motor vehicle;
wherein in said braking mode said control means applies a repetitive control signal to said switching means, said repetitive control signal alternating between a first value for a first period and a second value for a second period, wherein said regenerative charging current is repetitively built up during said first period during which said motor is isolated from said storage battery, said regenerative charging current being discharged through said storage battery during said second period thereby charging said storage battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A hybrid drive system for a motor vehicle comprising:
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a. a dc electric motor for applying motive power to said motor vehicle, said motor having an armature coil and a field coil; b. a storage battery for supplying a drive current to said electric motor; c. semiconductor switching means for selectively applying said drive current to said motor, said switching means including current steering means for applying current through said field coil in a single direction during an actuation mode and a dynamic braking mode; and d. control means coupled to said switching means for operating said motor in said actuation mode for moving said motor vehicle, and said dynamic braking mode for applying dynamic braking to said motor vehicle, wherein in said dynamic braking mode said semiconductor switching means periodically isolates said motor from said battery for a first time period to build up a regenerative charging current, and drive said regenerative charging current through said battery during a second time period. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification