(under subclass 362) Subject matter in which the motor to be controlled is braked as a result of the motor being converted into an electric generator, which supplies electric energy to an electric circuit.
(1) Note. An electric motor to be controlled can be converted into an electric generator (1) merely as a result of change in the operating conditions (such as mere change in speed of the motor so that its c.e.m.f. exceeds the applied voltage), (2) by appropriately changing the electric circuits of the motor, or (3) by properly changing the circuit constants in existing motor circuits so that the c.e.m.f. generated by the motor exceeds any value of voltage applied to the motor. An electric motor is converted to a braking generator whenever the generated e.m.f. within the motor exceeds in magnitude the opposing potentials, if any, that are applied to the motor and whenever the generating circuit is simultaneously connected to a closed electric circuit. The "closed electric circuit" may comprise a low resistance (dead) short circuit, a useful-load circuit (including the circuit which supplies the electric energy to the motor during motoring operation) or a purely resistive (dissipating) circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
87, for dynamic braking of two or more electric motors.
373, for miscellaneous systems for "plugging" (application of reverse power) an electric motor.
759, for dynamic braking of an induction motor.
763, for "plugging" (application of reverse power) of an induction motor. SEE OR SEARCH CLASS
105, Railway Rolling Stock,
49, (particularly noting subclass 61) for dynamic braking of electric locomotives.
180, Motor Vehicles,
65, for vehicles having electric motors to supply the motive power and wherein dynamic braking may be effected to retard the vehicle.
188, Brakes,
159, for electric operators for braking devices in which the operator therefor is energized by motors operating as generators.
310, Electrical Generator or Motor Structure,
93, for dynamoelectric brakes.
322, Electricity: Single Generator Systems, for generation systems, per se, and the controls therefor.
