초록 ▼

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 deg

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. Therefore, the energization of the relays and thus of the switching control of the armature terminal voltage is conditioned by an armature rotational speed and/or an armature current. In another preferred embodiment of the present invention, the abovementioned continuous control of the field current is conditioned by a threshold value of armature rotational speed and/or an armature current. In a further preferred embodiment, the abovementioned switching control of the armature voltage and the abovementioned continuous control of the field current are both conditioned by a threshold value of armature rotational speed and/or an armature current.

대표청구항 ▼

A control device for an electric vehicle comprising: an electrical power source; a DC shunt or compound motor for driving said electric vehicle, said motor comprising an armature and a shunt field coil being connected so as to be energized by said electrical power source; means for adjusting the rot

A control device for an electric vehicle comprising: an electrical power source; a DC shunt or compound motor for driving said electric vehicle, said motor comprising an armature and a shunt field coil being connected so as to be energized by said electrical power source; means for adjusting the rotational speed of said motor, wherein said means for adjusting has a range of positions and is continuously adjustable from a start position to positions throughout its range; switching control means responsive to said speed adjusting means for selectively applying values of armature terminal voltage to said armature; and field coil current control means responsive to said speed adjusting means throughout said range for continuously controlling the current flowing through said shunt field coil, whereby the rotational speed of said motor is controlled to a value determined by the applied armature terminal voltage selected by said switching control means and the current flowing through said shunt field coil continuously controlled by said field coil current control means.