초록 ▼

A method and apparatus for calculating an accurate estimate of an unregulated DC bus voltage to be used with a DC-to-DC converter including a transformer having a primary winding and a secondary winding, the primary winding in series with a switch between the positive and negative rails of the unreg

A method and apparatus for calculating an accurate estimate of an unregulated DC bus voltage to be used with a DC-to-DC converter including a transformer having a primary winding and a secondary winding, the primary winding in series with a switch between the positive and negative rails of the unregulated DC bus voltage, an electrically insulating coupler linked to a switch control line to provide a trigger pulse to a sample and hold circuit, and a sample and hold circuit linked to the transformer secondary winding for measuring the secondary winding voltage when the sample and hold circuit is triggered, the sample and hold circuit providing an output voltage which can be used to calculate the DC bus voltage estimate.

대표청구항 ▼

[ What is claimed is:] [12.] An apparatus for measuring the magnitude of an unregulated DC bus voltage, the apparatus comprising:a transformer including a primary winding and at least one secondary winding;a switch in series with the primary, the series switch and primary linked in series with the u

[ What is claimed is:] [12.] An apparatus for measuring the magnitude of an unregulated DC bus voltage, the apparatus comprising:a transformer including a primary winding and at least one secondary winding;a switch in series with the primary, the series switch and primary linked in series with the unregulated bus voltage;a regulator linked to the switch to open and close the switch;a voltage sensor linked to the secondary to measure the voltage across the secondary, the sensor providing a voltage signal;a sampler circuit linked to the voltage sensor for sampling the voltage signal when a trigger signal is received, the sampler circuit providing an output signal at an output terminal; andan electrical isolating coupler linked to the regulator for sensing when the switch closes and providing the trigger signal to the sampler circuit when the switch closes.