Patents Assigned to Daihatsu Motor Co., Inc.
  • Patent number: 3962612
    Abstract: A control device is disclosed for an electric car employing a DC shunt motor, the armature, of which, is connected to a storage battery through a first relay contact and two series resistors shunted by second and third relay contacts second and third relays are energized in turn depending upon a degree of depression of an accelerator pedal, so that an armature terminal voltage is controlled to a plurality of values which are dependent upon the degree of pedal depression, the shunt field coil is connected through a field current control circuit for continuously controlling the field current depending upon a degree of depression of the accelerator pedal. In a preferred embodiment transistors are connected in series with the relays such that transistors are controlled by threshold values of rotational speed of the armature and/or an armature current.
    Type: Grant
    Filed: October 8, 1974
    Date of Patent: June 8, 1976
    Assignee: Daihatsu Motor Co., Inc.
    Inventor: Toshikazu Kawasaki