Transformers' efficiency tends to improve with increasing transformer capacity. Further investigation found that current transformers on the main transformer were improperly set. Shellac was used for fixing inductor, motor, generator and transformer windings. This method uses a double wound transformer and a capacitor. Regulated designs compensate for the impedance of the transformer or coil. The increase in voltage is achieved in AC circuits by using a "step-up transformer". The two circuits interacted to form a resonant transformer. Examples include an ideal electrical transformer or a lever. The distance between conductors of the transformer forms a capacitance. This boost converter acts like a step-up transformer for DC signals. Hz, phase-locked to the output from the transformer. A variety of types of electrical transformer are made for different purposes. This simplifies the construction of the converter transformer. It can be seen as a power transformer exploiting rotating magnetic fields. This figure shows the half section of a toroidal transformer.