Patent US5724466A successfully refreshed from Google Patents.
Patent US4726187A successfully refreshed from Google Patents.
US4726187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for controlling the speed of rotation of a hydrostatic machine
Assignee: Bosch Rexroth AG
•
Filing: 1986-05-09
•
Granted: 1988-02-23
•
Expires: 2006-05-09
Abstract
Abstract A control for the speed of rotation of a hydrostatic machine in which the controlled variable and generated in a speed controller and is made up of a proportional component and an integrating component is limited by a limiting signal which is also made up of a predetermined basic value and a ramp signal behaving proportionally to the actual pivot angle of the hydrostatic machine. The limiting signal thus limits the output signal of the speed controller so that a rapid response behaviour is obtained and fluctuations in the settling to the desired speed are reduced.
Inventors
- 👤 Peter Reinhardt
- 👤 Karl Hessdorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:11
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/47; F04; F04B; F04B49/00; F04B49/06; F04B49/08; F16H59/00; F16H59/68; F16H2059/6838; F16H2059/6876; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/903; Y10S388/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A circuit arrangement for controlling the speed of rotation of a hydrostatic machine connected to a pressure line comprising an actuator for adjusting the hydrostatic machine for setting its speed, a speed controller coupled to said machine and to which a speed actual value and an arbitrarily settable speed desired value are supplied, said speed controller generates a control signal for driving said actuator, characterized in that the output signal of the speed controller comprises a component proportional to the input quantity and a component integrating the input quantity, means for forming a limiting signal consisting of a predetermined basic value to which is added a ramp signal proportional to a measured variable proportioned to the position of said actuator, and said limiting signal being superimposed on the output signal of the speed controller.
Claim 2
Dependent Claim
134 words
A circuit arrangement for controlling the speed of rotation of a hydrostatic machine connected to a pressure line comprising an actuator for adjusting the hydrostatic machine for setting its speed, a speed controller coupled to said machine and to which a speed actual value and an arbitrarily settable speed desired value are supplied, said speed controller generates a control signal for driving said actuator, characterized in that the output signal of the speed controller comprises a component proportional to the input quantity and a component integrating the input quantity, means for forming a limiting signal consisting of a predetermined basic value to which is added a ramp signal proportional to a measured variable proportioned to the position of said actuator, and said limiting signal being superimposed on the output signal of the speed controller.
Claim 3
Dependent Claim
87 words
Circuit arrangement according to claim 1, characterized in that the limiting signal is formed in a follow-up loop consisting of a ramp former, a summation member for the ramp signal generated by the ramp former and proportional to the instantaneous controlled variable and the basic value set at a potentiometer, a limiting member connected to the output of an integrating member of the speed controller and a limiting member connected to the output of a summation member for the proportional and integral component of the speed controller.
Claim 4
Dependent Claim
43 words
Circuit arrangement according to claim 1, characterized in that a quantity former is provided for the controlled variable in which a unipolar signal is formed which is independent of the polarity of the controlled variable and which is supplied to the ramp former.
Claim 5
Dependent Claim
19 words
Circuit arrangement according to claim 1, characterized in that the means for forming the limiting signals are amplitude limiters.
Claim 6
Dependent Claim
28 words
Circuit arrangement according to claim 1, characterized in that an amplifier forms the proportional component of the speed controller includes a multiplying member for varying the proportional component.
Claim 7
Dependent Claim
36 words
Circuit arrangement according to claim 5, characterized in that the controlled variable is connected via a summation means to the multiplying member, and on increasing the adjustment a larger signal is supplied to the multiplying member.
Claim 8
Dependent Claim
23 words
Circuit arrangement according to claim 1, characterized in that the controlled signal is generated by a pickup on the actuator of the machine.
Claim 9
Dependent Claim
21 words
Circuit arrangement according to claim 1, characterized in that the controlled signal comprises a limited output signal of the speed controller.
Claim 10
Dependent Claim
50 words
Circuit arrangement according to claim 2, characterized in that the integrating member consists of a motor and a potentiometer adjustable by means of said motor, said potentiometer being connected to the summation member and said motor being connected to a differential amplifier for forming a signal for the control deviation.
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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |