Field shunting control for a DC series motor
First Claim
Patent Images
1. In a vehicle powered by a battery and driven by a series DC electric motor having an armature with a series connected field winding and a circuit connected in parallel with the series field winding for shunting a portion of the armature current around the field winding to increase the maximum motor speed, said circuit having a switch therein, an improved speed control including:
- means responsive directly to the speed of said motor, closing said switch to complete the field shunt circuit above a selected motor speed.
0 Assignments
0 Petitions
Accused Products
Abstract
A battery powered vehicle with a series field DC drive motor has a field shunt circuit which is completed by closing a centrifugal switch responsive to motor speed, increasing the speed of the vehicle. An enabling circuit for the field shunt is completed by a switch on the vehicle accelerator.
9 Citations
9 Claims
-
1. In a vehicle powered by a battery and driven by a series DC electric motor having an armature with a series connected field winding and a circuit connected in parallel with the series field winding for shunting a portion of the armature current around the field winding to increase the maximum motor speed, said circuit having a switch therein, an improved speed control including:
means responsive directly to the speed of said motor, closing said switch to complete the field shunt circuit above a selected motor speed. - View Dependent Claims (2, 3, 4, 5, 6)
-
7. In a series DC electric motor having an armature with a series connected field winding, connected with a DC power source and a circuit connected in parallel with the series field winding for shunting a portion of the armature current around the field winding, said circuit having a switch therein, an improved field shunt control, including:
means responsive directly to the speed of said motor, closing said switch to complete the field shunt circuit above a selected speed to increase the maximum motor speed. - View Dependent Claims (8, 9)
Specification