Patent ID: 11876454
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The power supply circuit as claimed in claim 4, wherein the controller is arranged to monitor the input voltage and is further arranged such that:
when the input voltage is between a first threshold and a second threshold greater than said first threshold, the controller operates the power supply circuit in a first mode in which the controller closes the third switch and opens the fourth switch;
when the input voltage is above the second threshold, the controller operates the power supply circuit in a second mode in which the controller applies the third PWM signal to the third switch and opens the fourth switch; and
when the input voltage is below the first threshold, the controller operates the power supply circuit in a third mode in which the controller closes the third switch and applies the fourth PWM signal to the fourth switch.