DE2621374A1 - DC motor drive esp. for tracked vehicles - has electronically regulated thyristor units for each motor - Google Patents

Abstract

The tracked vehicle drive uses d.c. motors. Each d.c. motor (1) is individually fed via a regulated thyristor unit (2) from an electronically regulated supply. Each motor (1) has a tacho-generator (7) a voltage transducer (8) and an ammeter (9). An adder circuit (10) receives signals from the transducers and tacho-generators to determine the average voltage value for the average motor revolution speed. The average revolution speed is the sum of the individual revolutions divided by the number of motors. The adder output is fed to a revolution regulator (5) together with the speed regulator (4). The output is then distributed to each motor current regulator (6).

Description

Caterpillar drive

The invention relates to a caterpillar vehicle drive with several direct current motors and an electronic control device that is independent of the caterpillar drive e.g. through uphill or downhill driving acting total torque with uniform and simultaneous Distribution of the torques to the individual DC motors, these to one previously selected constant speed as well as independent of the caterpillar drive acting total torque, however, depending on each other caused e.g. by cornering different speeds of the DC motors and the resulting different Individual torques that DC motors regulate to the same torque to be output.

It is known for a caterpillar vehicle drive that is controlled and / or in this way to use regulated DC motors. The DC motors are either connected in series or connected in series in groups and controlled by a control device regulated.

A fault occurring in a DC motor or a converter causes all of the series-connected DC motors of the corresponding ones to fail Group, this severely affects the availability of the tracked vehicle.

The invention is based on the object of a tracked vehicle drive that is not susceptible to failure to be set up with commercially available devices.

The object is achieved according to the invention in that a caterpillar vehicle drive of the type mentioned, the DC motors each individually via one of the electrical control device controlled thyristor group from the electrical supply network are fed.

The advantages achieved with the invention are in particular: that the voltage level for the tracked vehicle propulsion system and the amperage each thyristor DC motor unit is reduced and that in a possible Disturbance of a DC motor or a thyristor group only this hyristor-DC motor unit needs to be turned off while all other dhyristor DC motor units remain operational. Furthermore, there is an extraordinary simplification in the construction of the electrical system and a minimum of components and DC motor types. This is for the reserve in particular with different Chassis types very advantageous.

An embodiment of the invention is shown in the drawing, which is a Overview circuit diagram of a caterpillar vehicle drive with DC motors and a electronic control device shows, shown and will be described in more detail below.

The caterpillar vehicle drive has, for example, four direct current motors 1, each individually via controlled thyristor groups 2 from the electrical supply network are fed. Each thyristor group 2 is each with its control electrodes a current flow start timer 3 is connected. The control of the current flow start timer 3 is carried out by an electronic control device.

Purely the control device is a speed sensor 4, a speed relay 5 and a current generator 6 for each DC motor 1 and devices that the Measure the currents, the voltages and the speeds of the DC motors 1 and the corresponding Give signals, provided.

Each DC motor 1 has a mechanically coupled generator 7, which emits a proportional signal of the speed, or a voltage measuring converter device 8 for measuring the applied voltage and outputting a proportional signal this measured voltage and a current measuring converter device 9 for measuring the respective Current strength and output of a proportional signal of this current strength. A calculator 10 determined from the generators 7 and the voltage measuring converter devices 8 signals supplied the value of the mean voltage to the mean speed of the DC motors 1 of the caterpillar vehicle drive. The mean speed is that Sum of the individual speeds of the DC motors 1 divided by the number these DC motors 1 The speed controller 5 is with his Inputs with the output of the speed sensor 4 and with the output of the computer 10 and its output with one of the inputs of the current regulator 6 connected. Each current regulator 6 is assigned to a direct current motor 1 and one of its Inputs to the current measuring converter provided for this DC motor 1 9 interconnected. The Stromreg-1er 6 control the current flow use timer 3, which with the individual thyristor groups 2 are connected to.

This current control for each one DC motor 1 and this jointly superimposed speed control cause the DC motors 1 to The same torque to be output and the medium speed selected for the same aperture are regulated.

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Claims (1)

Claim: caterpillar vehicle drive with several DC motors and an electronic control device that is independent of the caterpillar drive e.g. through uphill or downhill driving acting total torque with uniform and simultaneous Distribution of the torques to the individual DC motors, these to one previously selected constant speed as well as independent of the caterpillar drive acting total torque, however, depending on each other caused e.g. by cornering different speeds of the DC motors and the resulting different Individual torques that regulate DC motors to the same torque to be output, characterized in that the DC motors (1) each individually via a controlled by the electronic control device hyristor group (2) from the electrical Supply network are fed.