Method of and device for reducing charging time of batteries and increasing power and torque of electric motors

Patent · Tue Feb 04 00:00:00 EST 1986

OSTI ID:5984270

Graham, M E

This patent describes a method of reducing the charging time of batteries and increasing battery life. The method consists of a step of applying to the battery at the rate of about 30 times per second, a relatively short pulse of relatively high voltage. This is followed immediately by a relatively long relatively low voltage continuation of the high voltage pulse, the relatively high voltage being substantially greater than the normal charging voltage of the battery. The relatively low voltage is substantially the normal charging voltage of the battery, the relatively short pulse being of a duration short enough so that no excessive heating of the battery results from the current flowing through the battery during the pulse. It also consists of a method of increasing power and torque output of a single winding electric motor. This method includes the step of repeatedly applying to the motor a relatively short pulse of relatively high voltage, followed by a relatively long relatively low voltage continuation of the high voltage pulse. The relatively high voltage is substantially greater than the normal rated voltage of the motor and the relatively low voltage is not greater than substanitally the normal rated voltage of the motor.

• Assignee: NOV; EDB-86-078417
• Patent Number(s): US 4568869
• OSTI ID: 5984270
• Resource Relation: Patent File Date: Filed date 4 Jan 1984
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
BATTERY CHARGERS
CONTROL SYSTEMS
ELECTRIC BATTERIES
BATTERY CHARGING
ELECTRIC MOTORS
POWER GENERATION
TORQUE
ELECTRIC POTENTIAL
HEATING
PULSE GENERATORS
PULSES
SERVICE LIFE
TIME DEPENDENCE
ELECTROCHEMICAL CELLS
ELECTRONIC EQUIPMENT
EQUIPMENT
FUNCTION GENERATORS
MOTORS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries