Control apparatus
First Claim
Patent Images
1. A power control apparatus, comprising:
- a bridge circuit comprised of semiconductor controlled rectifiers each responsive to control signals for selectively rendering said controlled rectifiers conductive and non-conductive, said bridge circuit including input terminals for receiving in use an AC input power signal and input terminals for receiving in use a DC input power signal and output terminals for providing a DC output power signal in use when an input power signal is applied to said bridge circuit; and
control means, responsive to an input power signal applied in use to said bridge circuit, for applying control signals to said controlled recitifiers to control their respective conductivities in a chopper mode when the applied power signal is a DC power signal in order to control a DC output power signal developed by said bridge circuit in response to the input DC power signal, and for applying control signal to said controlled rectifiers to control their respective conductivities in a converter mode when the applied power signal is an AC power signal in order to control a DC power output signal developed by said bridge circuit in response to the input AC power signal.
0 Assignments
0 Petitions
Accused Products
Abstract
Four thyristors are interconnected into an AC bridge circuit. With an AC source connected across inputs to the bridge circuit, a DC motor is connected across outputs of the bridge circuit while the thyristors are operated in the phase control mode to control the power supply to the motor from the AC source. In the absence of the AC source the DC motor is serially connected to a battery across the outputs of the bridge circuit with the thyristors operated in the chopping control mode. Also, in the presence of the AC source, a rectifier bridge including thyristors and diodes can be connected across the battery to exclusively charge it from the AC source.
28 Citations
23 Claims
-
1. A power control apparatus, comprising:
-
a bridge circuit comprised of semiconductor controlled rectifiers each responsive to control signals for selectively rendering said controlled rectifiers conductive and non-conductive, said bridge circuit including input terminals for receiving in use an AC input power signal and input terminals for receiving in use a DC input power signal and output terminals for providing a DC output power signal in use when an input power signal is applied to said bridge circuit; and control means, responsive to an input power signal applied in use to said bridge circuit, for applying control signals to said controlled recitifiers to control their respective conductivities in a chopper mode when the applied power signal is a DC power signal in order to control a DC output power signal developed by said bridge circuit in response to the input DC power signal, and for applying control signal to said controlled rectifiers to control their respective conductivities in a converter mode when the applied power signal is an AC power signal in order to control a DC power output signal developed by said bridge circuit in response to the input AC power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
- 21. An AC/DC power control apparatus for controlling either of an AC and a DC power source, comprising, in combination, bridge circuit means including a pair of series combinations each having a pair of thyristors serially interconnected with the same polarity, said pair of series combinations being interconnected in parallel circuit relationship, said bridge circuit means including a pair of DC input terminals formed of the junctions of said series combinations interconnected in parallel circuit relationship and a pair of AC input terminals formed of the junctions of the serially connected thyristors disposed in the said pair of series combinations, DC load means serially connected to said pair of DC input terminals with DC power source means, AC-source sensor means connected across said AC input terminals to sense whether or not AC power source means is connected across said AC input terminals, said AC source sensor being operative to disconnect said DC power source means from said DC load means when said AC power source means is connected across said AC input terminals, gate control means for effecting the phase control to cause said thyristors to control the AC power supply to said DC load means when said AC power source means is connected across said AC input terminals, said gate control means causing said thyristors to control the intermittent power supply to said DC load means when said DC load means is serially connected to said DC power source means, and circuit means for commutating a predetermined one of said thyristors of said bridge circuit means to cause a power from said DC power source means to supply a power to said DC load means when a capacitor or a series combination of a capacitor and a reactor is connected across said pair of AC input terminals and in the presence of the series combination of said DC power source means and said DC load means.
Specification