Saturation control of magnetic cores of bidirectional devices

摘要

A system for controlling saturation of a magnetic core of a transformer includes a transformer control circuit, a Hall sensor, and a processor. The transformer control circuit is configured to provide cycles of bidirectional excitation to the transformer at a first frequency and a first duty cycle. The Hall sensor is configured to output a first field value of the magnetic core during a first half-cycle of each of the cycles of bidirectional excitation and a second field value during a second half-cycle of each of the cycles of bidirectional excitation. The processor is configured to increase the first duty cycle to a second duty cycle in response to a magnitude of the first field value exceeding a first threshold magnitude. The processor is further configured to increase the first frequency to a second frequency in response to both the magnitude of the first field value exceeding the first threshold magnitude and the magnitude of the second field value exceeding a second threshold magnitude.

主权项

1. A method of controlling saturation of a magnetic core of a transformer, the method comprising:
providing cycles of bidirectional excitation to a transformer at a first frequency and a first duty cycle; sensing, using a Hall sensor, a first field value of the magnetic core; adjusting, using a processor, the first duty cycle in response to the magnitude of the first field value exceeding a first threshold magnitude; sensing, using the Hall sensor, a second field value of the magnetic core in response to the magnitude of the first field value exceeding the first threshold magnitude; and adjusting, using the processor, the first frequency in response to a magnitude of the second field value exceeding a second threshold magnitude.