US 12,444,296 B2
Bidirectional transmission circuit for universal signal
Min Xu, Shanghai (CN); Gang Du, Shanghai (CN); Fan He, Shanghai (CN); and Xi Fang, Shanghai (CN)
Assigned to SHANGHAI CHENZHU INSTRUMENT CO., LTD., Shanghai (CN)
Appl. No. 18/274,920
Filed by SHANGHAI CHENZHU INSTRUMENT CO., LTD., Shanghai (CN)
PCT Filed Mar. 15, 2021, PCT No. PCT/CN2021/080859
§ 371(c)(1), (2) Date Jul. 28, 2023,
PCT Pub. No. WO2022/160423, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 202110120265.5 (CN), filed on Jan. 28, 2021.
Prior Publication US 2024/0113634 A1, Apr. 4, 2024
Int. Cl. G08C 19/02 (2006.01); H02M 3/335 (2006.01)
CPC G08C 19/02 (2013.01) [H02M 3/33561 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A bidirectional transmission circuit for a universal signal, comprising a power supply module and a bidirectional transmission module;
wherein the bidirectional transmission module comprises an intrinsically safe energy limiting module, a first signal coupling module, an isolation transformer module, a second signal coupling module and a control module, wherein the first signal coupling module is electrically connected to the intrinsically safe energy limiting module and the isolation transformer module, respectively, and the second signal coupling module is electrically connected to the isolation transformer module and the control module, respectively, and the power supply module is electrically connected to the intrinsically safe energy limiting module, the first signal coupling module, the second signal coupling module and the control module;
wherein the intrinsically safe energy limiting module comprises a control signal receiving terminal and at least one universal signal input terminal, the control signal receiving terminal is configured to receive a control signal, and each of the at least one universal signal input terminal is configured to input the universal signal;
wherein the control module comprises a control signal output terminal and a universal signal receiving terminal, the control signal output terminal is configured to output the control signal, and the universal signal receiving terminal is configured to receive the universal signal;
wherein the first signal coupling module is configured to adjust a first direct current signal of the universal signal to be a first alternating current signal, the isolation transformer module is configured to transmit the first alternating current signal to the second signal coupling module in an isolation manner, and the second signal coupling module is configured to adjust the first alternating current signal to be a second direct current signal and transmit the second direct current signal to the universal signal receiving terminal;
wherein the second signal coupling module is further configured to adjust a third direct current signal of the control signal to be a second alternating current signal, the isolation transformer module is further configured to transmit the second alternating current signal to the first signal coupling module in an isolation manner, and the first signal coupling module is further configured to adjust the second alternating current signal to be a fourth direct current signal and transmit the fourth direct current signal to the control signal receiving terminal;
wherein the first signal coupling module comprises a first filtering unit, a first alternating current-direct current conversion unit and a direct current-alternating current conversion unit;
wherein the second signal coupling module comprises a second filtering unit, a second alternating current-direct current conversion unit and the direct current-alternating current conversion unit;
wherein the first filtering unit and the second filtering unit are each configured to filter the universal signal and the control signal;
wherein the first alternating current-direct current conversion unit is configured to adjust the second alternating current signal to be the fourth direct current signal and transmit the fourth direct current signal to the control signal receiving terminal;
wherein the second alternating current-direct current conversion unit is configured to adjust the first alternating current signal to the second direct current signal and transmit the second direct current signal to the universal signal receiving terminal;
wherein the direct current-alternating current conversion unit is configured to adjust the first direct current signal of the universal signal to be the first alternating current signal and adjust the third direct current signal of the control signal to be the second alternating current signal;
wherein the first filtering unit comprises a first capacitor and a second capacitor, a first terminal of the first capacitor is electrically connected to each of the at least one universal signal input terminal, and a second terminal of the first capacitor is electrically connected to the control signal receiving terminal; a first terminal of the second capacitor is electrically connected to each of the at least one universal signal input terminal, and a second terminal of the second capacitor is electrically connected to the control signal receiving terminal;
wherein the first alternating current-direct current conversion unit comprises a third capacitor and a fourth capacitor; the direct current-alternating current conversion unit comprises a first inductor, a second inductor, a fifth capacitor, a first diode, a second diode, a first transistor and a second transistor; a first terminal of the third capacitor is electrically connected to each of the at least one universal signal input terminal, a first terminal of the first transistor, a control terminal of the first transistor and an anode of the first diode; and a second terminal of the third capacitor is electrically connected to a first terminal of the fourth capacitor and a first terminal of the isolation transformer module; a second terminal of the fourth capacitor is electrically connected to the control signal receiving terminal, a first terminal of the second transistor, a control terminal of the second transistor, a cathode of the second diode, a first terminal of the second inductor and a first terminal of the fifth capacitor; a first terminal of the first inductor is electrically connected to a second terminal of the isolation transformer module; and a second terminal of the first inductor is electrically connected to a second terminal of the second inductor, a second terminal of the fifth capacitor, a second terminal of the first transistor and a second terminal of the second transistor; a cathode of the first diode is electrically connected to an anode of the second diode;
wherein the second filtering unit comprises a third inductor, a fourth inductor, a sixth capacitor and a seventh capacitor, wherein a first terminal of the third inductor is electrically connected to the universal signal receiving terminal and a first terminal of the sixth capacitor; and a second terminal of the third inductor is electrically connected to a first terminal of the seventh capacitor, wherein a first terminal of the fourth inductor is electrically connected to the control signal output terminal and a second terminal of the sixth capacitor, and wherein a second terminal of the fourth inductor is electrically connected to a second terminal of the seventh capacitor; and
wherein the second alternating current-direct current conversion unit comprises an eighth capacitor, a ninth capacitor, a third diode and a fourth diode, wherein a first terminal of the eighth capacitor is electrically connected to the second terminal of the third inductor and a cathode of the third diode; and a second terminal of the eighth capacitor is electrically connected to a first terminal of the ninth capacitor and a third terminal of the isolation transformer module, wherein a second terminal of the ninth capacitor is electrically connected to the second terminal of the fourth inductor and an anode of the fourth diode, and wherein an anode of the third diode and a cathode of the fourth diode are each electrically connected to a fourth terminal of the isolation transformer module.