# US 12,119,637 B2 · Monitoring system for monitoring a supply voltage for an electronic component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,637 B2 - Document ID: US12119637B2 - Status: Granted - Kind: B2 - Application number: 18/353,512 - Filed: 2023-07-17 - Published: 2024-01-18 - Granted: 2024-10-15 - Earliest claimed: 2018-02-13 - Assignees: Truma Geraetetechnik GmbH & Co. KG - Applicants: Truma Geraetetechnik GmbH & Co. KG - Inventors: Sebastian Uchman - Web page: https://patentgrep.com/patent/US12119637B2 ## CPC - H02H 3/24: responsive to undervoltage or no-voltage {(H02H3/207 takes precedence)} - F04D 27/001: {Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring} - G01L 27/00: Testing or calibrating of apparatus for measuring fluid pressure - G01R 19/16576: {comparing DC or AC voltage with one threshold (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533 and G01R19/1659 take precedence)} - H02H 1/0007: {concerning the detecting means (in general G01R or other subclasses of G01; reed switches H01H71/2445)} - H03K 5/22: Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral (indicating phase difference of two cyclic pulse trains G01R25/00) - H02H 3/06: with automatic reconnection - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract A monitoring system for monitoring a supply voltage for an electronic component is described, comprising a voltage monitoring unit, which is configured to monitor a voltage level assigned to a supply voltage applied to the electronic component, and a switching unit which is configured to switch the electronic component on and/or off. The switching unit is coupled with the voltage monitoring unit. The switching unit is furthermore configured to switch off the electronic component if the voltage monitoring unit determines that the voltage level is below a predetermined threshold value. A mains monitoring circuit is furthermore described. ## Claims ### Claim 1 A monitoring system for monitoring a supply voltage for an electronic component, comprising: a voltage monitoring unit which is configured to monitor a voltage level assigned to the supply voltage applied to the electronic component, and a switching unit which is configured to switch the electronic component ON and/or OFF, wherein the switching unit is coupled with the voltage monitoring unit, wherein the switching unit is configured to switch the electronic component OFF when the voltage monitoring unit determines that the voltage level is below a predetermined threshold value, wherein the monitoring system includes a sensor which monitors a pressure of a system having the electronic component, and wherein the switching unit is configured to switch the electronic component ON again when the system parameter detected by the sensor falls below and/or reaches a specified parameter value; and a mains monitoring circuit for a monitoring system including two mains connections for a mains voltage, and a comparator, wherein the mains monitoring circuit includes a reference voltage circuit section which generates a reference voltage applied to the comparator from the mains voltage, wherein the reference voltage circuit section includes a capacitor, wherein the output of the comparator is assigned to a microcontroller and/or to an optocoupler, and wherein the microcontroller is assigned to a switching element in terms of control. ### Claim 2 (depends on 1) The monitoring system according to claim 1, wherein the monitoring system is configured to detect the time span during which the voltage level is below the predetermined threshold value. ### Claim 3 (depends on 1) The monitoring system according to claim 1, wherein the switching unit is configured to switch OFF the electronic component when the detected time span is longer than a predetermined time span. ### Claim 4 (depends on 1) The monitoring system according to claim 1, wherein the switching unit is configured to switch OFF the electronic component for a specified period of time and/or to switch the electronic component ON again. ### Claim 5 (depends on 1) The monitoring system according to claim 1, wherein the voltage monitoring unit is configured to check the voltage level again after the switching OFF of the electronic component. ### Claim 6 (depends on 1) The monitoring system according to claim 1, wherein the monitoring system is configured to indirectly identify the pressure via a temperature. ### Claim 7 (depends on 1) The monitoring system according to claim 1, wherein the electronic component is a compressor working against a load, a mechanical load, and is an air-conditioner compressor. ### Claim 8 (depends on 1) The monitoring system according to claim 1, wherein a rectifier bridge assigned to the two mains connections is provided, the bridge outputs of which are each assigned to the reference voltage circuit section, wherein a low-pass filter and/or a diode for stabilizing the rectified voltage is/are provided between a bridge output and the reference voltage circuit section. ### Claim 9 (depends on 1) The monitoring system according to claim 1, wherein the mains monitoring circuit includes a supply voltage circuit section for the comparator which generates an operating voltage for the comparator from the mains voltage. ### Claim 10 A monitoring system for monitoring a supply voltage for an electronic component, comprising: a voltage monitoring unit which is configured to monitor a voltage level assigned to the supply voltage applied to the electronic component, and a switching unit which is configured to switch the electronic component ON and/or OFF, wherein the switching unit is coupled with the voltage monitoring unit, wherein the switching unit is configured to switch the electronic component OFF when the voltage monitoring unit determines that the voltage level is below a predetermined threshold value, wherein the monitoring system includes a sensor which monitors a pressure of a system having the electronic component, and wherein the switching unit is configured to switch the electronic component ON again when the system parameter detected by the sensor falls below and/or reaches a specified parameter value; and a mains monitoring circuit including two mains connections for a mains voltage, and a comparator, wherein the mains monitoring circuit includes a reference voltage circuit section which generates a reference voltage applied to the comparator from the mains voltage, wherein the reference voltage circuit section includes a capacitor, wherein the comparator has a first input to which a reference voltage is applied and a second input to which a voltage to be monitored is applied, and/or wherein the reference voltage is generated internally via the monitoring circuit.