US4153128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive aggregate for electric vehicles
Assignee: Daimler Benz AG
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Filing: 1976-12-03
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Granted: 1979-05-08
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Expires: 1996-12-03
Abstract
Abstract A drive aggregate for electric vehicles, especially for trackless street vehicles, which is equipped with an electric shunt motor provided with field current control and with a change-speed transmission having at least two forward speeds connected behind the electric shunt motor; the electric shunt-wound motor thereby has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range whereby the change-speed transmission is an automatic transmission connected with the electric shunt motor by way of a speed-reducing gear while the oil pump of the automatic transmission is driven by an electric motor coordinated thereto which operates at substantially constant rotational speed.
Inventors
- 👤 Ulrich Heitmeyer
- 👤 Adrian Kupsa
- 👤 Hans-Joachim Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; H02P7/2985; B; B60; B60L; B60L50/00; B60L50/50; B60L50/52; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/72
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation. and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is a hydraulic automatic change-speed transmission.
Claim 2
Dependent Claim
106 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation. and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is a hydraulic automatic change-speed transmission.
Claim 3
Dependent Claim
18 words
A drive unit according to claim 1, characterized in that the electric vehicle is a trackless street vehicle.
Claim 4
Dependent Claim
33 words
A drive aggregate according to claim 1, characterized in that an armature current control is provided which is designed for an armature current substantially coordinated to the rated torque of the overall drive.
Claim 5
Dependent Claim
21 words
A drive aggregate according to claim 3, characterized in that the armature current control is devoid of any regenerative braking arrangement.
Claim 6
Dependent Claim
42 words
A drive aggregate according to claim 1, characterized in that a series circuit including a starting resistance and an auxiliary contactor is provided in the armature current circuit, and in that a main contactor is connected in parallel with said series circuit.
Claim 7
Dependent Claim
19 words
A drive aggregate according to claim 5, characterized in that the main contactor is actuated by a drive switch.
Claim 8
Dependent Claim
18 words
A drive aggregate according to claim 5, characterized in that the speed reduction transmission comprises a hydrodynamic coupling.
Claim 9
Dependent Claim
19 words
A drive aggregate according to claim 5, characterized in that the speed reduction transmission comprises a hydrodynamic torque converter.
Claim 10
Dependent Claim
70 words
A drive aggregate according to claim 1, wherein said automatic transmission is provided with a maximum transmission ratio of approximately 4.3:1, the speed reduction transmission is provided with a speed-reducing ratio of 2.4:1, and the shunt motor is provided with a rated rotational speed of about 3,000 r.p.m. with a maximum rotational speed of 6,000 r.p.m. so as to provide an overall control range of 8.6:1 achieved by field control.
Claim 11
Dependent Claim
47 words
A drive aggregate according to claim 1, wherein said speed reduction transmission is arranged so as to directly receive the output of said shunt motor throughout the entire operating range of the motor so as to cause the whole change-speed transmission to operate at a lower speed.
Claim 12
Dependent Claim
161 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation, and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is an automatic change-speed transmission, characterized in that a series circuit including a starting resistance and an auxiliary contactor is provided in the armature current circuit, in that a main contactor is connected in parallel with said series circuit, and in that said speed reduction transmission comprises a planetary gear arrangement arranged between the shunt motor and the automatic change-speed transmission.
Claim 13
Dependent Claim
161 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation, and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is an automatic change-speed transmission, characterized in that a series circuit including a starting resistance and an auxiliary contactor is provided in the armature current circuit, in that a main contactor is connected in parallel with said series circuit, and in that said speed reduction transmission comprises a planetary gear arrangement arranged between the shunt motor and the automatic change-speed transmission.
Claim 14
Dependent Claim
34 words
A drive aggregate according to claim 11, characterized in that the planetary gear arrangement includes lamellae brake means for holding fast the reaction element of the planetary gear arrangement during starting of the vehicle.
Claim 15
Dependent Claim
19 words
A drive aggregate according to claim 12, characterized in that the main contactor is actuated by a drive switch.
Claim 16
Dependent Claim
127 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation, and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is an automatic change-speed transmission, and the automatic transmission is provided with an oil pump driven at substantially constant rotational speed by an electric motor connected thereto.
Claim 17
Dependent Claim
127 words
In a drive aggregate for electric vehicles of the type comprising an electric shunt motor with a field winding and field current control for adjusting the motor speed by field regulation, and a change-speed transmission having plural stepped speed ratios, said change-speed transmission being connected with the shunt motor, the improvement in that the shunt motor has a relatively high rated rotational speed in relation to its maximum rotational speed and a relatively reduced field-weakening range, wherein a speed reduction transmission is provided, said speed reduction transmission interconnecting said shunt motor with said change-speed transmission, and wherein said change-speed transmission is an automatic change-speed transmission, and the automatic transmission is provided with an oil pump driven at substantially constant rotational speed by an electric motor connected thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |