A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, a first inverter/rectifier coupled to motor/generator, a bus coupled to the first inverter/rectifier, a second inverter/rectifier coupled to the bus, and a traction motor/generator coupled to an output of the second inverter/rectifier, an operator speed control member, and a controller coupled to the second inverter/rectifier for controlling a current output of the second inverter/rectifier as a function of a position of the speed control member Also included is an operator controlled foot pedal and a transducer coupled to the foot pedal and generating a signal representing foot pedal position which is supplied to the controller The controller limits current supplied by the second inverter/rectifier to the traction motor/generator to a limit current as a function of the transducer signal The controller, foot pedal and transducer cooperate to vary the limit current in response to movement of the foot pedal A spring biases the foot pedal to an upper limit position The controller causes the second inverter/rectifier to supply to the traction motor/generator a maximum amount of current, (such maximum current being a function of the foot pedal position), but not more than that required to achieve the speed commanded by the speed control

Variable current limit control for vehicle electric drive system

Described herein is a system for intravascular drug delivery system, which includes a reservoir implantable a blood vessel, an intravascular pump fluidly coupled to the reservoir and an anchor expandable into contact with a wall of the blood vessel to retain the system within the vasculature. Delivery conduits may be extend from the reservoir and are positionable at select locations within the vasculature for target drug delivery to select organs or tissues.

Intravascular delivery system for therapeutic agents

The present application describes an intravascular implantable pacing and/or defibrillation system. The described system includes a pulse generator that is implantable within a blood vessel and proportioned to blood flow through the blood vessel, and at least one electrode attachable to the pulse generator. During implantation, the pulse generator is introduced into a patient's vasculature, advanced to a desired vessel and anchored in place within the vessel. The electrode or electrodes are placed within the heart or surrounding vessels as needed to deliver electrical pulses to the appropriate location.

Intravascular electrophysiological system and methods

A capacitor-discharge implantable cardioverter defibrillator (ICD) has a relatively longer device life of greater that 5 years. The longer life of the ICD is achieved by selecting and arranging the internal components of the ICD to deliver a maximum defibrillation countershock optimized in terms of a minimum physiologically effective current (I pe ), rather than a minimum defibrillation threshold energy (DFT). As a result of the optimization in terms of a minimum effective current I pe , there is a significant decrease in the maximum electrical charge energy (E c ) that must be stored by the capacitor of the ICD to less than about 30 Joules, even though a higher safety margin is provided for by the device. Due to this decrease in the maximum E c , as well as corollary decreases in the effective capacitance value required for the capacitor and the net energy storage required of the battery, the overall displacement volume of the ICD is reduced to the point where subcutaneous implantation of the device in the pectoral region of human patients is practical. The size of the capacitor is reduced because the effective capacitance required can be less than about 125 μF. By optimizing both the charging time and the countershock duration for the smaller maximum E c , the size of the battery is reduced because the total energy storage capacity can be less than about 1.0 Amp-hours. In the preferred embodiment, the charging time for each defibrillation countershock is reduced to less than about 10 seconds and the pulse duration of the countershock is reduced to less than about 6 milliseconds.

Implantable cardioverter defibrillator having a smaller displacement volume

A capacitor-discharge implantable cardioverter defibrillator (ICD) has a relatively smaller mass of less than about 120 grams. The smaller mass of the ICD is achieved by selecting and arranging the internal components of the ICD to deliver a maximum defibrillation countershock optimized in terms of a minimum physiologically effective current (Ipe), rather than a minimum defibrillation threshold energy (DFT). As a result of the optimization in terms of a minimum effective current Ipe, there is a significant decrease in the maximum electrical charge energy (Ec) that must be stored by the capacitor of the ICD to less than about 30 Joules, even though a higher safety margin is provided for by the device. Due to this decrease in the maximum Ec, as well as corollary decreases in the effective capacitance value required for the capacitor and the net energy storage required of the battery, the overall displacement volume of the ICD is reduced to the point where subcutaneous implantation of the device in the pectoral region of human patients is practical. The size of the capacitor is reduced because the effective capacitance required can be less than about 125 μF. By optimizing both the charging time and the countershock duration for the smaller maximum Ec, the size of the battery is reduced because the total energy storage capacity can be less than about 1.0 Amp-hours. In the preferred embodiment, the charging time for each defibrillation countershock is reduced to less than about 10 seconds and the pulse duration of the countershock is reduced to less than about 6 milliseconds.

Implantable cardioverter defibrillator having a smaller mass

An electric auto power supply has an energy battery which is capable of discharging a current for a comparatively long period of time and high in energy density, and a power battery which is capable of discharging a current of a comparatively high amperage and high in power density. The energy battery and the power battery are connected respectively by way of switching means in parallel relation to each other, so as to be used as a power source of an electromobile. The current discharged from these batteries is controlled, such that a current required for the travelling of the electromobile, which is dependent upon the travelling conditions thereof, is supplied simultaneously from both batteries, or separately from individual batteries, or otherwise only from one battery, while a current is being charged to the other battery, thus extending the possible mileage range of the electromobile.

Control system for battery hybrid system

Method for controlling an automatic pipe welder is disclosed. In the automatic welder which requires remote control, welding conditions for butt welding pipes are stored and an actual joint geometry or groove shape is sensed. From signals relating to the stored welding conditions and the sensed groove shape, a control command signal in actual welding is produced to effect welding under an optimum condition. On the other hand, an arc condition at an actual welding point and a melting condition of a metal are monitored and displayed to modify the welding conditions in accordance with the monitored condition to control the automatic pipe welder.

Method for controlling an automatic pipe welder

An electromobile equipped with an automatic transmission which may detect a running condition of a vehicle and selects a gear ratio suited for the running condition. In this electromobile, a build-up characteristic of an electric motor current immediately after gear-change is improved, thereby minimizing delay in power transmission so as to shorten a gear-changing duration, in an attempt to improve an operational feeding of a driver at the time of gear change.

Automatic change-gear control device for use in electromobile

Fukusudenchi no haiburitsudoseigyohoshiki

PURPOSE:To protect the motor from rotating at an excessive speed during noload operation and at the same time to prevent runaway of vehicle when it is started adrubtly

Shibata Takanori

Papers

Control system for battery hybrid system

Method for controlling an automatic pipe welder

Automatic change-gear control device for use in electromobile

Fukusudenchi no haiburitsudoseigyohoshiki

Control system for electric vehicles having speed change gear