Piezoelectric power supply
First Claim
1. A piezoelectric power supply comprising a control unit, a power switch and an inductor to drive a piezoelectric transformer unit to actuate a load to operate, wherein:
- the piezoelectric transformer unit includes a plurality of piezoelectric transformers which are selected and coupled in parallel to the load according to the required power of the load to alter the voltage and current output by the entire piezoelectric transformer unit;
said power switch includes a plurality of power switches connected in parallel with each power switch driving at least one piezoelectric transformer unit; and
two piezoelectric transformer units are connected to a single load in a push-pull configuration.
1 Assignment
0 Petitions
Accused Products
Abstract
A piezoelectric power supply has a piezoelectric transformer circuit configuration which is alterable flexibly according to varying loading power requirements. It includes a control unit (control IC), a power switch (MOSFET) and an inductor to drive a piezoelectric transformer unit to actuate a high voltage and power load such as a cold cathode fluorescent lamp. The piezoelectric transformer unit consists of a plurality of piezoelectric transformers coupled in parallel. The specification of the piezoelectric transformers (single sheet piezoelectric transformers or low level laminated piezoelectric transformers) and parallel coupling number may be altered according to the required power of the load to change the voltage and current output by the piezoelectric transformers.
24 Citations
12 Claims
-
1. A piezoelectric power supply comprising a control unit, a power switch and an inductor to drive a piezoelectric transformer unit to actuate a load to operate, wherein:
-
the piezoelectric transformer unit includes a plurality of piezoelectric transformers which are selected and coupled in parallel to the load according to the required power of the load to alter the voltage and current output by the entire piezoelectric transformer unit; said power switch includes a plurality of power switches connected in parallel with each power switch driving at least one piezoelectric transformer unit; and two piezoelectric transformer units are connected to a single load in a push-pull configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A piezoelectric power supply comprising:
-
a control unit; a plurality of power switches connected in parallel; at least one inductor connected to each power switch; at least two piezoelectric transformer units being connected to each power switch, each piezoelectric transformer unit having a plurality of piezoelectric transformers coupled in parallel; a plurality of loads, with at least one load corresponding to each power switch; wherein each load is connected to a pair of piezoelectric transformers in a push-pull configuration. - View Dependent Claims (12)
-
Specification