Regenerative braking controller for a DC motor
AssigneeHitachi, Ltd.
InventorsMichimasa Horiuchi, Hiroshi Narita
Life of this patent
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Abstract
A regenerative braking controller for use with a series-wound DC motor which drives an electric car for railways or electric automobile and which is controlled by a thyristor chopper comprises a series-connected circuit including an armature of the DC motor, a field winding thereof and a smoothing reactor, a chopper connected in parallel with said series-circuit, a diode connected between said parallel circuit and a power supply, and a gate controller for applying a gate signal to said chopper in succession only during a period of time when said chopper is to be rendered conductive.
Claims8
A regenerative braking controller for use with a DC motor, comprising a series-connected circuit including an armature of the DC motor, a field winding thereof and a smoothing reactor;
- a thyristor chopper connected in parallel with said series-circuit and including at least a main thyristor and a commutation thyristor for turning off said main thyristor;
- a diode connected between said parallel circuit and a power supply;
- and a gate controller means for applying a gate signal to the gate of said main thyristor continuously during the period of time when said chopper is to be conductive and applying a pulse signal to the gate of said commutation thyristor at the end of said period of time.
Dependencies are inferred from the claim text.