Showing papers on "Dynamic braking published in 1976"
Patent•
08 Dec 1976
TL;DR: In this paper, an improved logic circuit for a time or a distance to overcome stop starting braking due to momentary "safe" signals caused by multiple reflection of a radar signal is proposed.
Abstract: Braking of a vehicle is prolonged by an improved logic circuit for a time or a distance to overcome stop starting braking due to momentary "safe" signals caused by multiple reflection of a radar signal
12 citations
Patent•
08 Apr 1976
TL;DR: In this article, a time unit is provided to restore electro dynamic braking after a predetermined time lapse, where the braking power is disconnected from the axle wheel or wheels which are locked.
Abstract: Normal braking is accomplished by an electro dynamic brake to reduce the trains speed from a first velocity to a reduced velocity at which point the electro dynamic brake is automatically switched off and the train halted by a friction brake. Should one or more axle wheels lock during the electrodynamic braking process the friction brake anti skid regulator of the axle wheel or wheels concerned automatically switches off the electro dynamic brake, and changes over to friction braking. The trains retard rate remains unaltered and braking power is disconnected from the axle wheel or wheels which are locked. A time unit is provided to restore electro dynamic braking after a predetermined time lapse.
3 citations
01 Jan 1976
TL;DR: Theoretical studies of the parameters which affect the operation of choppers in d.c. electric traction are presented: chopper frequency, magnetic coupling, and the choice of control method for rheostatic and regenerative braking as discussed by the authors.
Abstract: Theoretical studies of the parameters which affect the operation of choppers in d.c. electric traction are presented: chopper frequency, magnetic coupling, and the choice of control method for rheostatic and regenerative braking.
3 citations
Patent•
02 Dec 1976
TL;DR: In this paper, the elimination of overvoltage when the cyclo-converter controlling the rotary machine is interrupted on the input side by utilizing the thyristor power regulator controlled by the dynamic braking of rotary machines.
Abstract: PURPOSE:The elimination of overvoltage when the cyclo-converter controlling the rotary machine is interrupted on the input side by utilizing the thyristor power regulator controlled by the dynamic braking of the rotary machine
3 citations
Patent•
09 Jul 1976
TL;DR: In this paper, a sensing circuit for protecting a pair of dynamic brake resistors when either of two motors driving fans for cooling the resistors fails is proposed. But the circuit is not suitable for the case of a single motor.
Abstract: A circuit for protecting a pair of dynamic brake resistors when either of two motors driving fans for cooling the resistors fails. A sensing circuit couples the terminal of the two motors to a switch circuit. The sensing circuit reduces the energy to the switch circuit which removes power to the resistors when the sensing circuit senses a failure in one of the motors.
2 citations
01 Apr 1976
TL;DR: In this paper, the effects of the various factors (such as the conditions of the loaded goods, difference between the right and the left braking forces, distribution of the braking force of axles, rising time of braking forces) involved in the stability of tractor and semi-trailer vehicles were investigated experimentally (a brake test in a steady turn).
Abstract: For the purpose of improving the stability of tractor and semi-trailer vehicles at the time of braking, the effects of the various factors (such as the conditions of the loaded goods, difference between the right and the left braking forces, distribution of the braking force of axles, rising time of the braking force of axles) involved in the stability at the time of braking were investigated experimentally (a brake test in a steady turn). One the basis of results of this experiment, the motion of the combination vehicles when braked was applied was simulated by means of a very simplified model of four degrees of freedom and the calculated results were compared with the experimented data mainly in the criteria of tractor yaw velocity. /Author/
2 citations
01 Jan 1976
TL;DR: In this paper, the performance of various split braking systems as well as spring brake actuators are compared with a tractor-Semi-trailer combination and it is concluded that lateral stability must be obtained on both a dry and a wet road surface.
Abstract: The purpose of the research was to obtain an insight into various secondary braking systems for goods vehicles. Practical tests were carried out with a tractor- semi-trailer combination. The performance of various split braking systems as well as spring brake actuators are shown. With nearly all of the secondary braking systems it is possible to obtain sufficient deceleration to meet legal requirements for the braking path. The critical point however is lateral stability. The report concludes with recommendations for legal requirements concerning lateral stability both on dry and on wet road surfaces. It is concluded that: lateral stability must be obtained on both a dry and a wet road surface; tractors for semi-trailers should have a split braking system; and service brakes for motor vehicles and trailers (semi-trailers) should have a certain braking capacity in case a failure occurs (emergency braking capacity). As a solution it is proposed that the emergency braking capacity of the service brake shall be at least 50% of the normal required capacity. /TRRL/