Patent US3756335A successfully refreshed from Google Patents.
US3756335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive vehicle equipped with an alternating-current drive
Assignee: Siemens AG
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Filing: 1971-03-05
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Granted: 1973-09-04
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Expires: 1991-03-05
Abstract
Abstract An automotive vehicle equipped with wheels connected to induction motors through transmissions is provided with a speed control apparatus connected to the induction motors for adjusting the speed of rotation or RPM of the wheels. The speed control apparatus has a voltage supply and a converter connected to this supply and to at least some of the motors to supply the latter with a voltage changeable in magnitude and frequency. At least one voltage control member is connected between at least one of the motors and the converter. A control device actuable when the vehicle travels along a curved path is connected to the voltage control member for adjusting the RPM of the one motor as required to permit the vehicle to negotiate the curve.
Inventors
- 👤 M Eisele
- 👤 G Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
B; B60; B60K; B60K1/00; B60K1/02; B60L; B60L15/00; B60L15/20; B60L15/2036; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/12; B60L2220/40; B60L2220/42; B60L2240/00; B60L2240/10; B60L2240/32; B60L2240/40; B60L2240/42; B60L2240/421; B60L2240/423; B60L2240/427; B60L2240/46; B60L2240/461; B60L2250/00; B60L2250/26; B60L2260/00; B60L2260/20; B60L2260/28; B60L2270/00; B60L2270/10; B60L2270/14; B60L2270/145; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to all of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve.
Claim 2
Dependent Claim
116 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to all of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve.
Claim 3
Dependent Claim
25 words
In a vehicle according to claim 1 wherein a plurality of said voltage control members are connected intermediate said converter and said induction motors respectively.
Claim 4
Dependent Claim
50 words
In a vehicle according to claiM 1 wherein some of said induction motors are grouped into sets of motors, one of said voltage control members being connected to each of said sets for driving the motors of each set at approximately the same RPM when the vehicle negotiates a curve.
Claim 5
Dependent Claim
18 words
In a vehicle according to claim 1, said apparatus comprising controller means connected to said voltage control members.
Claim 6
Dependent Claim
210 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said control means comprising a reference value source for detecting the torque of the motor corresponding to the curve outer wheel, detecting transmitter means for detecting the respective actual torques of said motors corresponding to said wheels respectively, and controller means connected at its input side to said transmitter means and said reference value source for obtaining therefrom actual value and reference value torque signals, said controller means being connected to said voltage control members to adjust the RPM''s of the motors corresponding to the latter in response to said torque signals.
Claim 7
Dependent Claim
210 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said control means comprising a reference value source for detecting the torque of the motor corresponding to the curve outer wheel, detecting transmitter means for detecting the respective actual torques of said motors corresponding to said wheels respectively, and controller means connected at its input side to said transmitter means and said reference value source for obtaining therefrom actual value and reference value torque signals, said controller means being connected to said voltage control members to adjust the RPM''s of the motors corresponding to the latter in response to said torque signals.
Claim 8
Dependent Claim
75 words
In an automotive vehicle according to claim 5, wherein each of said motors has a stator structure and wherein said detecting transmitter means comprises a plurality of detecting transmitters disposed with respect to corresponding ones of said motors, each of said detecting transmitters comprising measuring means mounted on said stator structure so as to be unaffected by shocks imparted to said structure as a consequence of irregularities in the surface over which the vehicle travels.
Claim 9
Dependent Claim
199 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said control means comprising a tacho-generator for providing a signal indicative of motor RPM, a signal sender for providing a signal proportional to the radius of curvature of the curve traveled by said vehicle, and a function generator connected at its input side to said tacho-generator and said signal sender for receiving said signals therefrom, said induction generator being connected to said voltage control member for adjusting the RPM of the motor corresponding to the latter in response to said signals.
Claim 10
Dependent Claim
199 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuable when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said control means comprising a tacho-generator for providing a signal indicative of motor RPM, a signal sender for providing a signal proportional to the radius of curvature of the curve traveled by said vehicle, and a function generator connected at its input side to said tacho-generator and said signal sender for receiving said signals therefrom, said induction generator being connected to said voltage control member for adjusting the RPM of the motor corresponding to the latter in response to said signals.
Claim 11
Dependent Claim
146 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuabLe when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said induction motors being three-phase induction motors each having a bus supply for each phase, said voltage control member being connected in only one of said bus supplies.
Claim 12
Dependent Claim
146 words
In an automotive vehicle equipped with wheels connected to induction motors through transmissions, speed control apparatus connected to said induction motors for adjusting the RPM of the wheels, said apparatus comprising voltage supply means, a converter connected to said supply means and to at least some of said motors to supply the latter with a voltage changeable in magnitude and frequency, at least one voltage control member connected intermediate at least one of said motors and said converter, and control means actuabLe when said vehicle travels along a curved path, said control means being connected to said voltage control member for adjusting the RPM of said one motor as required to permit the vehicle to negotiate the curve, said induction motors being three-phase induction motors each having a bus supply for each phase, said voltage control member being connected in only one of said bus supplies.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |