Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1985-11-06
1987-04-28
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307 10R, 307 39, 340 80, 315 83, H02J 314, G08B 2100
Patent
active
046617175
ABSTRACT:
A load condition determining apparatus having a drive circuit having first and second MOS-transistors, the drains of the MOS-transistors are connected to a power supply respectively, the control-gate thereof are connected to a voltage stepping circuit, and the source of the first MOS-transistor is connected both to a load circuit and to one input terminal of a differential amplifier while the source of the second MOS-transistor is connected both to a load equivalence circuit having resistors and a capacitor and to the other input terminal of the amplifier. The resistance of the load equivalence circuit is equalized with the resultant resistance component of the load circuit while the time constant of the capacitance and part of the resistance of the load equivalence circuit is modeled after the rush current of the load circuit, when operated, in the apparatus according to the invention. The normal and abnormal conditions of the load circuit can be determined by the occurrence of the balance and the unbalance between input voltages to the differential amplifier from the sources of the MOS-transistors in accordance with the normal condition, the short-circuited condition, or the disconnected condition of the load circuit. In order to distinguish the abnormal conditions from a provisional change in the load circuit, the upper and lower threshhold voltage levels are provided in a comparing circuit.
REFERENCES:
patent: 3671955 (1972-06-01), Malekzadeh
patent: 3869664 (1975-03-01), Safer et al.
patent: 3876975 (1975-04-01), Sakurai
patent: 4105996 (1978-08-01), Shimizu
patent: 4173750 (1979-11-01), Riba
patent: 4236143 (1980-11-01), Mizuno
patent: 4246566 (1981-01-01), Endo et al.
patent: 4259659 (1981-03-01), Ariyoshi et al.
patent: 4291302 (1981-09-01), King et al.
patent: 4318152 (1982-03-01), Weber
patent: 4333122 (1982-06-01), Hayden et al.
patent: 4349810 (1982-09-01), Kugo et al.
patent: 4499385 (1985-02-01), Slavik
patent: 4550303 (1985-10-01), Steele
Ip Shik Luen Paul
Nissan Motor Co,. Ltd.
Shoop Jr. William M.
LandOfFree
Load condition determining apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Load condition determining apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load condition determining apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-478903