A controller system for a bathing installation such as a spa, whirlpool bath or a pool, the bathing installation including a line voltage AC supply for selectively powering peripherals. The controller system includes an electronic controller configured to ...

A power supply device (10) includes a plurality of constant current output circuits (14) that can supply power to a load (12). The constant current output circuit (14) includes a pulse generation unit (20) that generates a pulse voltage having a pulse widt...

A power supply device (10) is provided with a plurality of constant current output circuits (14) that are capable of supplying power to a load (12). Each constant current output circuit (14) is provided with: a pulse generation unit (20) for generating a p...

A direct current (DC) power transmission system (10) is described. The DC power transmission system includes a first plurality of series connected power collection systems (12) and at least one superconducting DC conductor (32) coupled to the plurality of ...

An identification interface (3) is connected between power supply (2) and load (1). A serial stream of data having a bit pattern representing the operation of load is transmitted during an identification mode generated by identification interface by inputt...

In a complex power distribution network (e.g. CATV), a switching mode power supply at a node, automatically recovers from low input voltage conditions. When the input voltage to a switching power supply decreases to a critical level, the output voltage is ...