US4283664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control signal generator for the commutating device of a brushless electronics motor
Assignee: Siemens AG
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Filing: 1979-12-21
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Granted: 1981-08-11
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Expires: 1999-12-21
Abstract
Abstract The control signal generator contains two Hall effect generators which are shifted relative to each other by 90° electrically and magnetically, alao a gating circuit which derives from the Hall signals control signals for the switching elements of the commutating device. In order to make it possible to drive the motor digitally, the invention provides that the gating circuit comprise a combinatorial circit and, succeeding it, a 1-of-4 logic circuit. The combinatorial circuit furnishes two digital drive signals whose switching instants are shifted correspondingly ±45° electrically relative to the zero crossings of the Hall signals.
Inventors
- 👤 Hermann Ebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/14; Y; Y10; Y10S; Y10S310/00; Y10S310/03; Y10S322/00; Y10S322/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A control signal generator for the commutating device of a brushless electronic motor comprising: (a) two Hall effect generators which are shifted relative to each other by 90° electrically and magnetically and furnish Hall signals as a function of the rotor position; (b) a combinatorial circuit receiving said Hall signals and furnishing two digital drive signals whose switching instants are shifted by half the time span between two successive zero crossings of the Hall signals; and (c) a 1 to 4 logic circuit having as inputs the two drive signals and having an output which furnishes one control signal for each of the switching elements of the commutating device.
Claim 2
Dependent Claim
109 words
A control signal generator for the commutating device of a brushless electronic motor comprising: (a) two Hall effect generators which are shifted relative to each other by 90° electrically and magnetically and furnish Hall signals as a function of the rotor position; (b) a combinatorial circuit receiving said Hall signals and furnishing two digital drive signals whose switching instants are shifted by half the time span between two successive zero crossings of the Hall signals; and (c) a 1 to 4 logic circuit having as inputs the two drive signals and having an output which furnishes one control signal for each of the switching elements of the commutating device.
Claim 3
Dependent Claim
51 words
A control signal generator according to claim 1, wherein said two Hall effect generators are coupled in series with respect to their control current, and said combinatorial circuit comprises two comparators and a resistor network coupling the Hall voltage terminals of the Hall effect generators to the inputs of said comparators.
Claim 4
Dependent Claim
20 words
A control signal generator according to claim 2, wherein said comparators comprise operational amplifiers designed as amplifiers without external components.
Claim 5
Dependent Claim
17 words
A control signal generator according to claim 2 wherein said comparators comprise amplifiers wired as hysteresis switches.
Claim 6
Dependent Claim
59 words
A control signal generator according to claim 2, wherein each Hall voltage terminal of the one Hall effect generator is coupled to each Hall voltage terminal of the other Hall effect generator through two ohmic resistors in series and wherein the inputs of said comparators are each coupled to a center tap of one of the resistor series connections.
Claim 7
Dependent Claim
81 words
A control signal generator according to claim 2 wherein one Hall voltage terminal of the one Hall effect generator is coupled to each of the two Hall voltage terminals of the other Hall effect generator through separate circuits of ohmic resistors in series and wherein one input of each comparator is coupled to a center tap of one of the two resistor series connections while their other input is coupled to the joint control current terminal of the Hall effect generators.
Claim 8
Dependent Claim
28 words
A control signal generator according to one of claims 2, 5 or 6 wherein all individual resistors of the resistor network have at least approximately the same resistance.
Claim 9
Dependent Claim
19 words
A control signal generator according to claim 7 wherein at least some resistors of the resistor network are variable.
Claim 10
Dependent Claim
19 words
A control signal generator according to claim 7 wherein said logic circuit comprises two inverters and four AND gates.
Claim 11
Dependent Claim
18 words
A control signal generator according to claim 1 wherein said logic circuit comprise a commercially available integrated circuit.
References Cited (Backward Citations)
US3663877A
Cited
US3946292A
Cited
US3908130A
Cited
US4130769A
Cited
US3979651A
Cited
US4114073A
Cited
US4135120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |