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Regenerative braking controller for controlling a direct current motor adapted to drive a railway tramcar, an electric automobile or the like, comprises a direct current power supply, a series circuit composed of the armature and the field coil of the motor and a smoothing reactor, a chopper circuit

Regenerative braking controller for controlling a direct current motor adapted to drive a railway tramcar, an electric automobile or the like, comprises a direct current power supply, a series circuit composed of the armature and the field coil of the motor and a smoothing reactor, a chopper circuit connected in parallel with the series circuit and a diode inserted between the parallel circuit and the direct current power supply. The apparatus is characterized by an excitation circuit for exciting the field of coil of the d.c. motor with the voltage of the d.c. power supply so that a current may flow to the d.c. source due to voltage generated by the d.c. motor, and for supplying a power necessary for the operation of the chopper circuit from the d.c. source at the time of a low regenerating voltage of the d.c. motor.

대표청구항 ▼

In a controlling apparatus for regeneratively braking a direct current motor having an armature and a field coil connected to a direct current power supply, comprising a series circuit composed of the armature and the field coil and a smoothing reactor, a chopper means connected in parallel with the

In a controlling apparatus for regeneratively braking a direct current motor having an armature and a field coil connected to a direct current power supply, comprising a series circuit composed of the armature and the field coil and a smoothing reactor, a chopper means connected in parallel with the series circuit, a diode inserted between the parallel circuit and said direct current power supply, the improvement comprising excitation circuit means for supplying said field coil with an auxiliary excitation current from said direct current power supply when regenerative braking is effected, said direct current motor thereby generating regenerative power for producing a current flowing to said direct current power supply.