Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by digital or...
Patent
1998-09-29
2000-02-29
Ro, Bentsu
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Field control, or field and armature control, by digital or...
3889075, 318432, H02P 5178
Patent
active
060319658
ABSTRACT:
A motor control system is provided comprising an electrically charged battery, an electrical motor, a battery voltage sensor, a motor speed sensor, an armature voltage sensor, an armature current sensor, and a microprocessor. The magnitude of the armature current applied to the motor is a function of a predetermined armature current setpoint signal and the magnitude of the field current applied to the motor is a function of a predetermined field current setpoint signal, a field current correction signal, and a field current de-boost signal. The microprocessor programmed to generate an armature current setpoint signal, a field current setpoint signal, and an armature voltage reference signal. Further, the microprocessor is programmed to (i) compare the armature voltage reference signal to the measured armature voltage signal and generate an armature voltage error signal based on the comparison; (ii) generate the field current correction signal as a function of the armature voltage error signal; (iii) generate an armature-to-field current check function, wherein the check function defines a set of armature current to field current ratio values as a function of armature current; (iv) calculate a ratio of the measured armature current signal to the field current setpoint signal to establish an operating ratio value, (v) compare the operating ratio value to a corresponding armature current to field current ratio value of the armature-to-field current check function, and (vi) establish the field current de-boost signal, wherein the magnitude of the field current de-boost signal is a function of the measured armature current signal and the comparison of the operating ratio value to the corresponding ratio value.
REFERENCES:
patent: 3999111 (1976-12-01), Bailey
patent: 4079301 (1978-03-01), Johnson, III
patent: 4408147 (1983-10-01), Gabel
patent: 4422022 (1983-12-01), Hill et al.
patent: 4520299 (1985-05-01), Konrad
patent: 4788479 (1988-11-01), Rodi
patent: 5039924 (1991-08-01), Avitan
patent: 5070283 (1991-12-01), Avitan
patent: 5264763 (1993-11-01), Avitan
patent: 5349279 (1994-09-01), Avitan
patent: 5453672 (1995-09-01), Avitan
patent: 5585706 (1996-12-01), Avitan
patent: 5642023 (1997-06-01), Journey
patent: 5793175 (1998-08-01), Journey
patent: 5814958 (1998-09-01), Journey
Hong et al., "Microprocessor-Based High-Efficiency Drive of a DC Motor" IEEE Transactions on Industrial Electronics, vol. IE-34, No. 4, Nov. 1987, pp. 433-440, XP 002045489.
Park et al, "Microprocessor-Based Optimal-Efficiency Drive of an Induction Motor" IEEE Transactions on Industrial Electronics, vol. 1E-31, No. 1, Feb. 1984, pp. 69-73.
Hong et al., "Microprocessor-Based High-Efficiency Drive of a DC Motor" IEEE Transactions on Industrial Electronics, vol. 1E-34, No. 4, Nov. 1987, pp. 433-440.
Park et al., "Microprocessor-Based High Efficiency Drive of a DC Series Motor" IECON '84, pp. 455-459.
N. Mohan, "Improvement in Energy Efficiency of Induction Motors by Means of Voltage Control" IEEE Transactions of Power Apparatus and Systems, vol. PAS-99, No. 4 Jul./Aug. 1980, pp. 1466-1471.
Avitan et al., "Mathematical Modeling and Computer Simulation of a Separately Excited dc Motor with Independent Armature/Field Control" IEEE Transactions on Industrial Electronics, vol. 37, No. 6 Dec. 1990, pp. 483-489.
M. H. Rashid, "Automatic armature and field control of d.c. series motors" IEEE Proc., vol. 128, Pt. B, No. 1, Jan. 1981, pp. 73-78.
Funabiki et al., "Current commands for high-efficiency torque control of DC shunt motor" IEE Proceedings-B, vol. 138, No. 5, Sep. 1991, pp. 227-232.
Hammer Joseph K.
Harman John R.
Killian Christopher M.
Lankin Robert
Stang David B.
Ro Bentsu
Solaria Research Enterprise, Ltd.
LandOfFree
Separately excited DC motor with boost and de-boost control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Separately excited DC motor with boost and de-boost control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Separately excited DC motor with boost and de-boost control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-690522