There is provided a piezoelectric transformer. The piezoelectric transformer includes: a long-plate-shaped piezoelectric member being polarized in a thickness direction and a longitudinal direction; and input electrodes and output electrodes mounted on the piezoelectric member, wherein a thickness ratio LC/LA of the piezoelectric member ranges from 0.01 to 0.06, LC and LA being a thickness and a longitudinal length of the piezoelectric member, respectively. The piezoelectric member consists of e...

The present invention relates to an electrical transformer which includes a primary winding coupled to first and second magnetic circuits. A magnetic flux is driven through the magnetic circuits by the primary winding. First and second secondary windings are also provided, each associated with a respective one of the magnetic circuits and being electrically connected together in series opposition. A closed superconducting fault current winding is also provided to link with the magnetic flux in t...

A piezoelectric transformer (21) comprises a piezoelectric rectangular body (23) equally divided into first to fourth regions (A1, A2, A3, and A4) in a longitudinal direction. The first and the fourth regions (A1, A4) are provided with plane electrodes (24, 25, 26, and 27) as input electrodes and polarized in a thickness direction. Strip-like electrodes (30, 31) are formed at the boundary between the remaining second and third regions (A2, A3) as output electrodes. An AC input voltage having a f...

Planar windings of the secondary coil have outward extending portions which on the outside, so that the vias are situated at a larger distance from the core. In a planar transformer, also the turns of the primary coil may extend parallel to each other. In this manner, it is possible to further reduce the size of the transformer, while the power loss is minimal.

The invention relates to an inductive transmitter for transmitting measurement data and electrical energy between two components (1, 2) that move in relation to each other, having at least one primary (3, 5) and at least one secondary transmitter component (4, 6). There is one transmitter (3, 4) for transmitting measurement data and one transmitter (5, 6) for transmitting electrical energy, with the primary (3, 5) and secondary (4, 6) transmitter components being disposed in separate chambers (7...

A controllable transformer device comprising a body of a magnetic material, a primary winding wound round the body about a first axis, a secondary winding wound round the body about a second axis at right angles to the first axis, and a control winding wound round the body about a third axis, coincident with the second axis. The device can be employed to provide a frequency controlled power supply.

A superconducting transformer may include two pairs of axially extending windings. The windings are each in the form of a right cylindrical solenoid having a circular cross-section which are substantially concentrically nested. Each winding includes a plurality of turns formed from superconducting tape. Each winding respectively includes a first end and a second end which are configured for electrical connection with at least one of the other ends, an alternating power source, a load, or other p...

A rotary transformer for coupling electrical power at a high level into a rotor operable at a high rotational speed without the introduction of undesirable electromagnetic torque and problems of dynamic mechanical instability comprises a stationary primary mounted in surrounding relationship with respect to the rotor, an electromagnetic shield having an exterior surface thereon mounted to the rotor, and a secondary mounted on the exterior surface of the shield. The secondary is connected in an e...

A transformer includes a first winding member, a second winding member, a primary winding coil, a secondary winding coil and a magnetic core assembly. The first winding member has a first channel penetrating therethrough. The second winding member has a second channel penetrating therethrough and includes a covering part. The covering part has a receptacle communicating with the second channel. The primary winding coil is wound on the first winding member. The secondary winding coil is wound on ...

A Winding for high voltage transformer having a predetermined number of spaced winding groups joined to form a single winding transformer, each spaced winding group being solenoid wound from a predetermined number of turns. A method of forming the winding and a transformer including the winding are also disclosed.