US 12,085,594 B2
Method and circuit arrangement for ascertaining a type and value of an input voltage
Daniel Portisch, Poysdorf (AT)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Appl. No. 17/772,396
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Oct. 23, 2020, PCT No. PCT/EP2020/079929
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/083810, PCT Pub. Date May 6, 2021.
Claims priority of application No. 19205873 (EP), filed on Oct. 29, 2019.
Prior Publication US 2022/0373581 A1, Nov. 24, 2022
Int. Cl. G01R 23/02 (2006.01); G01R 19/00 (2006.01); H02M 1/44 (2007.01); H02M 3/24 (2006.01)
CPC G01R 23/02 (2013.01) [G01R 19/0084 (2013.01); H02M 1/44 (2013.01); H02M 3/24 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for ascertaining a voltage type of an input voltage of a power supply, a first output signal based on the input voltage of the power supply being detected utilizing a circuit arrangement, the method comprising:
awaiting a first threshold value to be undershot after a peak of the first output signal is passed through for a first time, until a predetermined number of repetitions is reached, the method further comprising:
storing a time stamp and starting a predetermined dead time when the first output signal undershoots the first threshold value;
checking whether the first output signal exceeds a second threshold value after the predetermined dead time has elapsed; and
waiting until the first output signal undershoots the first threshold value again when the first output signal has exceeded the second threshold value when the dead time has elapsed, the second threshold value being greater than the first threshold value;
wherein a frequency of the input voltage is derived from the stored time stamps after the predetermined number of repetitions has been reached.