Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1992-04-10
1994-09-06
Daugherty, Thomas M.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
307110, 361 16, H02M 318
Patent
active
053451619
ABSTRACT:
The power supply, useful with an electromagnetic force apparatus such as a riveter or a bolt inserter, includes two capacitor banks which are charged through charging doubler modules. Each charging doubler module includes an AC capacitor which is responsive to a power source. The AC capacitor is connected to a node point between two diode elements, which are connected in series across the capacitor bank. An analog-to-digital converter converts the voltage on the capacitor bank to a digital voltage for comparison with a selected digital charge voltage in a controller. The selected digital charge voltage may vary over time by means of a compensating algorithm. A ground fault indicator using a biasing voltage is connected between a selected electrical circuit portion of the force apparatus and earth ground. A gas discharge tube in combination with a current sensing element is connected to the capacitor banks to determine a possible overvoltage condition. A Hall-effect sensor is mounted between bus connections which carry the current between the capacitor bank and a coil portion of the electromagnetic force apparatus to determine the current flowing into the coil by measurement of the magnetic field between the bus bars.
REFERENCES:
patent: 3505586 (1970-04-01), Dulin
patent: 3631332 (1971-12-01), Williamson
patent: 3909672 (1975-09-01), Lundquist et al.
patent: 4649468 (1987-03-01), Cubbison
patent: 4689734 (1987-08-01), Lang
patent: 4723188 (1988-02-01), McMurray
patent: 4965860 (1990-10-01), Jochi
patent: 5149933 (1992-09-01), Donner
"Power Supplies" by L. M. Ernst et al., IBM Technical Disclosure Bulletin, vol. 20 No. 12, May 1978.
Daugherty Thomas M.
Electroimpact, Inc.
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