Switching circuit for an ups system

Abstract

This utility model belongs to the field of medical electrical equipment technology and discloses a power-on / off circuit based on a UPS system. In the power-on / off circuit, the first transistor is connected to an external cold start circuit, and the other end of the first transistor is connected to the first relay. The first relay is also connected to an external first power supply and a second relay. The second relay is also connected to an external second power supply, a third relay, and an external first power supply. The second relay is connected to a fourth relay. The fifth relay is connected to the contactor contacts. The third relay is connected to the fifth relay. The connection of the third and fifth relays to an external third power supply supports cold and hot start and safe shutdown.

Description

Technical Field

[0001] This utility model belongs to the field of medical electrical equipment technology, specifically relating to a power on / off circuit based on a UPS system. Background Technology

[0002] In thoracoscopic and laparoscopic surgical robot systems, traditional patient surgical platforms use self-locking buttons to directly control power supply during startup and shutdown. This method has the following problems: During startup, if the AC power is not connected, startup cannot be completed, meaning it lacks a cold start function. During shutdown, directly cutting off the power forces the industrial control computer to shut down, making it impossible to properly save relevant data from before shutdown. Utility Model Content

[0003] The purpose of this invention is to provide a power-on / off circuit based on a UPS system, which solves the problem of data loss caused by direct power failure in thoracic and laparoscopic surgical robot systems, and the problem that the system does not support cold start, resulting in low system reliability and safety.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides a power-on / off circuit based on a UPS system. The power-on / off circuit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a first transistor, and contactor contacts.

[0006] The first transistor is connected to an external cold start circuit, and the other end of the first transistor is connected to the first relay;

[0007] The first relay is also connected to an external first power supply, and the first relay is also connected to the second relay;

[0008] The second relay is also connected to an external second power supply, the second relay is also connected to the third relay, and the second relay is also connected to an external first power supply;

[0009] The second relay is connected to the fourth relay;

[0010] The fifth relay is connected to the contactor contacts;

[0011] The third relay is connected to the fifth relay;

[0012] The third relay and the fifth relay are connected to an external third power supply.

[0013] Based on the above description of the technical content, the technical effects of this application are specifically reflected in the following aspects:

[0014] This circuit uses a self-reset button and utilizes the auxiliary input and output signals of the DC UPS, switching power supply, and industrial control computer for logic circuit design. In the power-off state: when the AC power is not connected, pressing the power button once will cause the system to enter the cold start mode powered by the UPS and work normally; when the AC power is connected, pressing the power button once will cause the system to enter the warm start mode powered by the AC power and work normally.

[0015] When powered on: Press the power button once and the industrial computer will first enter the normal shutdown process. After the shutdown is completed, the system will automatically cut off the power and complete the safe shutdown.

[0016] This solution effectively avoids data loss caused by direct power outages, and supports both cold start and warm start modes, improving the reliability and security of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a delay circuit provided for an exemplary embodiment of the present disclosure. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] I. Explanation of descriptive terms used in this utility model

[0020] The embodiments provided in conjunction with the technical solutions of this utility model are intended to make the present utility model more thorough and complete, and to fully express the scope of the present utility model to those skilled in the art. It should be noted that unless otherwise specifically stated by the present utility model, the relative arrangement of components described in these embodiments should be interpreted as merely exemplary, and not as a limitation on the technical solutions of the present utility model.

[0021] In this utility model, the use of directional terms such as "upper," "lower," "left," "right," "bottom," and "top" is defined relative to the directions shown in the accompanying drawings and is used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be construed as restrictive terms.

[0022] In this utility model, the terms "a," "an," "a kind," "the," and similar words used do not indicate quantity limitation and can represent singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion; the terms "first," "second," "third," etc., used in this utility model are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0023] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0024] Furthermore, this utility model does not discuss in detail the technologies and equipment known to those skilled in the art, but where appropriate, such technologies and equipment should be considered part of the specification.

[0025] II. Based on the above problems, this utility model provides a technical solution to solve the above problems. The technical solution, working principle and technical effect of this utility model are described in detail below with reference to specific embodiments and figures.

[0026] Figure 1 An exemplary embodiment of this disclosure provides a power-on / off circuit based on a UPS system. The power-on / off circuit includes a first transistor 1, a first relay 2, a second relay 3, a third relay 4, a fourth relay 5, a fifth relay 6, and a contactor contact 13. The first transistor is connected to an external cold-start circuit, and the other end of the first transistor is connected to the first relay. The first relay is also connected to an external first power supply and a second relay. The second relay is also connected to an external second power supply, a third relay, and a first power supply. The second relay is connected to the fourth relay. The fifth relay is connected to the contactor contact. The third relay is connected to the fifth relay. The third and fifth relays are connected to an external third power supply.

[0027] Specifically, the base of the first transistor 1 is connected to an external cold-start circuit, the emitter of the first transistor 1 is grounded, and the collector of the first transistor 1 is connected to pin 2 of the first relay 2; pin 1 of the first relay 2 is also connected to an external first power supply, pin 5 of the first relay 2 is connected to pin 2 of the second relay 3, and pin 7 of the first relay 2 is grounded; pin 1 of the second relay 3 is also connected to an external second power supply, pin 2 of the second relay 3 is also connected to pin 6 of the third relay 4, and pin 7 of the second relay 3 is connected to the external first power supply; pin 8 of the second relay 3... The pin is connected to pin 4 of the third relay 4, and pin 2 of the third relay 4 is grounded; pin 5 of the second relay 3 is connected to pin 1 of the fourth relay 5, and pin 2 and pin 6 of the fourth relay 5 are grounded; pin 2 of the third relay 4 and pin 2 of the fifth relay 6 are both grounded, and pin 2 of the fifth relay 6 is grounded; pin 5 of the fifth relay 6 is connected to pin 1 of the contactor contact 13, and pin 2 of the contactor contact 13 is grounded; pin 7 of the third relay 4 and pin 3 of the fifth relay 6 are connected to an external third power supply.

[0028] This circuit is based on a Phoenix Contact UPS system. During a cold start, pressing the external start button connects pin NO1 to GND. The UPS receives the start signal and activates battery mode. The first external power supply is the 24V provided by the UPS after startup, and the second external power supply is the auxiliary voltage AUX provided by the DC-DC converter after startup, outputting 12V. Upon receiving the signal, the external cold start circuit (not shown in the diagram) outputs a short-duration pulse voltage (approximately 200ms) to this circuit (START port). This briefly activates the first relay 2, connecting pins 5 and 7, thus grounding pin 2 of the second relay 3 and activating it. Due to the presence of the third relay 4, the first relay 2 de-energizes and returns to its initial state. Pin 2 of the second relay 3 is grounded through pins 4 and 6 of the third relay 4, and pins 6 and 8 of the second relay 3, achieving self-locking. After the second relay 3 is activated, it will power on the fourth relay 5, connecting pin 6 (RC2) and pin 8 (RCG) of the fourth relay 5. When the external circuit receives this signal, it will activate the external third power supply and output 48V. At this time, the 48V will supply power to the coil of the contactor through the normally closed contact of the fifth relay 6. At this time, the external first power supply of 24V, AUX (12V) and 48V has been activated, and the subsequent circuit starts to work, and the cold start is completed.

[0029] In this embodiment, when the power is off and the AC power is not connected, pressing the power button once will cause the system to enter cold start mode powered by the UPS. After the UPS starts supplying power, the 48V power supply will be turned on, thus enabling normal startup. This realizes the control of the UPS and the entire system startup through a single start button socket.

[0030] In one embodiment, the power-on / off circuit further includes:

[0031] The base of the first transistor is also connected to an external hot-start circuit;

[0032] The external hot-start circuit includes a sixth relay and a seventh relay;

[0033] The sixth relay is connected to an external first power supply, and the sixth relay is also connected to the seventh relay;

[0034] The seventh relay is connected to the external first power supply;

[0035] The sixth and seventh relays are connected to an external first power supply;

[0036] The seventh relay is connected to the normally closed contact of the external start button;

[0037] The sixth relay outputs a hot start signal.

[0038] Specifically, the base of the first transistor 1 is also connected to an external hot-start circuit; the external hot-start circuit includes a sixth relay 7 and a seventh relay 8; pin 1 of the sixth relay 7 is connected to an external first power supply, and pin 2 of the sixth relay 7 is also connected to pin 3 of the seventh relay 8; pin 1 of the seventh relay 8 is connected to the external first power supply, and pin 5 of the seventh relay 8 is grounded; pin 7 of the sixth relay 7 and pin 4 of the seventh relay 8 are connected to the external first power supply; pin 2 of the seventh relay 8 is connected to the normally closed contact of an external start button; pin 5 of the sixth relay 7 outputs a hot-start signal.

[0039] During a warm start, the external power supply (AC-DC) is already in operation. The first external power supply is the 24V AC-DC power, and the second external power supply is the 12V AUX output from the DC-DC power supply. Both the 24V and 12V (AUX) power supplies have output voltage. When the start button is pressed, NC1 is briefly disconnected from GND, de-energizing the seventh relay 8 and briefly energizing the sixth relay 7. At this time, pin 5 (NO2) of the sixth relay 7 outputs a short-term high-level signal, causing the first relay 2 to briefly conduct, activating the second relay 3. Due to the presence of the third relay 4, the second relay 3 self-locks. After the second relay 3 is activated, it will power on the fourth relay 5, connecting pin 6 (RC2) and pin 8 (RCG) of the fourth relay 5. When the external circuit receives this signal, it will activate the external third power supply and output 48V. At this time, the 48V will supply power to the coil of the contactor through the normally closed contact of the fifth relay 6. At this time, the external first power supply of 24V, AUX (12V) and 48V has been activated, and the subsequent circuit starts to work. The hot start is complete.

[0040] In this embodiment, when the power is off and the AC power is connected, pressing the power button once will cause the system to enter the hot start mode powered by the AC power and operate normally.

[0041] In one embodiment, the eighth relay is connected to an external first power supply and is also connected to the fourth relay.

[0042] Specifically, the power-on / off circuit also includes an eighth relay 9; pin 1 of the eighth relay 9 is connected to an external first power supply, and pin 3 of the eighth relay 9 is connected to pin 3 of the fourth relay 5.

[0043] The external UPS's Bat-Start terminal is connected to pin 5 of the eighth relay 9, and the start button's NO1 is connected to pin 5 of the fourth relay 5. During a cold start, because NO1 is connected to GND when the start button is pressed, the UPS's Bat-Start terminal is connected to GND via pins 5 and 3 of the eighth relay 9 and pins 3 and 5 of the fourth relay 5. Based on this signal, the UPS starts and enters working mode, outputting 24V and 12V voltages. During a warm start, since 24V is already powered, the eighth relay 9 is already energized, and its normally closed contact is open. When the start button is pressed, pin 5 of the eighth relay 9 will not send a Bat-Start signal to the UPS, thus the UPS will not start supplying power.

[0044] In this embodiment, an eighth relay is added to prevent the UPS from starting up during a hot start.

[0045] In one embodiment, the power-on / off circuit further includes a ninth relay 10 and a second transistor 11; the seventh relay is connected to an external I / O port and is used to output a power-off request signal; the ninth relay is connected to an external first power supply and is grounded through a first capacitor; the third relay and the fifth relay are connected to the ninth relay, and the ninth relay is connected to the external first power supply; the base of the second transistor is connected to an external power-off circuit, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the ninth relay.

[0046] Specifically, pin 6 of the seventh relay 8 is connected to the external industrial control computer I / O port to output a power-off request signal; pin 2 of the ninth relay 10 is connected to the external first power supply, and pin 3 of the ninth relay 10 is grounded through the first capacitor 12; pin 1 of the third relay 4 and pin 1 of the fifth relay 6 are connected to pin 4 of the ninth relay 10, and pin 5 of the ninth relay 10 is connected to the external first power supply through a resistor and a diode; the base of the second transistor 11 is connected to the external power-off circuit, the emitter of the second transistor 11 is grounded, and the collector of the second transistor 11 is connected to pin 1 of the ninth relay 10.

[0047] Specifically, in the working state, pressing the start button socket briefly disconnects NC1 and GND, thus de-energizing the seventh relay 8. Pin 6 of the seventh relay 8 outputs a short-lived high-level shutdown signal (PC-off). Upon receiving the PC-off signal, the external industrial control computer enters the shutdown process. After shutdown, the industrial control computer's status signal (PC-ST) changes from high to low. At this time, pins 3 and 4 of the ninth relay close, and capacitor 12 supplies power to the third relay 4 and the fifth relay 6, energizing them and disconnecting the contactor coil. The contactor then opens, and the shutdown is complete. When shutting down after a cold start, pins 6 (GND) and 8 (Remote) of the fifth relay connect, shutting down the UPS.

[0048] In this embodiment, after the power is cut off by the seventh relay and a shutdown signal is issued, the industrial control computer will save the current state and shut down before sending a low-level signal to this circuit, thereby achieving a soft shutdown, ensuring the data security of the industrial control computer and improving the stability of the system.

[0049] In one embodiment, the switching circuit is connected via diodes between pins 1 and 2 of the first relay 2 and / or pins 1 and 2 of the second relay 3 and / or pins 1 and 2 of the third relay 4 and / or pins 1 and 2 of the fourth relay 5 and / or pins 1 and 2 of the fifth relay 6 and / or pins 1 and 2 of the eighth relay 9 and / or pins 1 and 2 of the sixth relay 7 and / or pins 1 and 2 of the seventh relay 8 and / or pins 1 and 2 of the ninth relay 10.

[0050] Specifically, pins 1 and 2 of the relay in this circuit are connected by a diode, which protects the relay in the circuit.

[0051] In one embodiment, the power-on / off circuit further includes a base of the first transistor 1 grounded via a second capacitor 14.

[0052] In one embodiment, the power-on / off circuit further includes the base of the first transistor 1 connected to the external hot-start circuit and the cold-start circuit via a first resistor 15.

[0053] In one embodiment, the power-on / off circuit further includes a base of the first transistor 1 that is grounded via a second resistor 16.

[0054] In one embodiment, the power-on / off circuit further includes an external hot-start circuit connected to the base of the first transistor 1 via a first diode 17.

[0055] In one embodiment, the power-on / off circuit further includes an external cold-start circuit connected to the base of the first transistor 1 via a second diode 18.

[0056] Specifically, in the above embodiments, multiple capacitors, resistors, and diodes are used in conjunction with the first transistor 1 to achieve the function.

[0057] In one embodiment, the power-on / off circuit further includes a third capacitor 19 grounding the base of the second transistor 11.

[0058] In one embodiment, the power-on / off circuit further includes a third resistor 20 connecting the base of the second transistor 11 to an external power-off circuit.

[0059] In one embodiment, the power-on / off circuit further includes a second transistor 11 whose base is grounded via a fourth resistor 21.

[0060] Specifically, in this embodiment, the function is achieved by using a capacitor, a resistor, and a second transistor 11 together.

[0061] In one embodiment, the power-on / off circuit further includes pin 5 of the ninth relay 10 connected to one end of the fifth resistor 23 via the third diode 22, and the other end of the fifth resistor 23 connected to the first power supply.

[0062] Specifically, in this embodiment, the ninth relay 10 is protected by the third diode 22 and the fifth resistor 23.

[0063] In one embodiment, the power-on / off circuit further includes the contactor coil negative terminal of the contactor contact 13 connected to pin 5 of the fifth relay 6 via a fourth diode 24.

[0064] Specifically, contactor contact 13 is protected by the fourth diode 24.

[0065] In one embodiment, the first relay 2, the third relay 4, the fourth relay 5, the fifth relay 6, the eighth relay 9, the sixth relay 7, and the seventh relay 8 are HFD4-I / 24 type relays.

[0066] In one embodiment, the second relay 3 is an HFD4-I / 12 type relay.

[0067] The above description is only a preferred embodiment of this application and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0068] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A switch-on / off circuit based on a UPS system, characterized by, The power-on / off circuit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a first transistor, and contactor contacts; The first transistor is connected to an external cold start circuit, and the other end of the first transistor is connected to the first relay; The first relay is also connected to an external first power supply, and the first relay is also connected to the second relay; The second relay is also connected to an external second power supply, the second relay is also connected to the third relay, and the second relay is also connected to an external first power supply; The second relay is connected to the fourth relay; The fifth relay is connected to the contactor contacts; The third relay is connected to the fifth relay; The third relay and the fifth relay are connected to an external third power supply.

2. The switching circuit of claim 1, wherein The power-on / off circuit also includes: The base of the first transistor is also connected to an external hot-start circuit; The external hot-start circuit includes a sixth relay and a seventh relay; The sixth relay is connected to an external first power supply, and the sixth relay is also connected to the seventh relay; The seventh relay is connected to the external first power supply; The sixth and seventh relays are connected to an external first power supply; The seventh relay is connected to the normally closed contact of the external start button; The sixth relay outputs a hot start signal.

3. The switching circuit of claim 2, wherein The power-on / off circuit also includes an eighth relay; The eighth relay is connected to the external first power supply, and the eighth relay is connected to the fourth relay.

4. The switching circuit of claim 3, wherein The power-on / off circuit also includes a ninth relay and a second transistor; The seventh relay is connected to an external I / O port and is used to output a signal requesting shutdown. The ninth relay is connected to an external first power supply, and the ninth relay is grounded through a first capacitor; The third relay is connected to the fifth relay and the ninth relay, and the ninth relay is connected to the external first power supply; The base of the second transistor is connected to an external shutdown circuit, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the ninth relay.

5. The switching circuit of claim 4, wherein, In the power-on / off circuit, pins 1 and 2 of the first relay, / or pins 1 and 2 of the second relay, / or pins 1 and 2 of the third relay, / or pins 1 and 2 of the fourth relay, / or pins 1 and 2 of the fifth relay, / or pins 1 and 2 of the eighth relay, / or pins 1 and 2 of the sixth relay, / or pins 1 and 2 of the seventh relay, and / or pins 1 and 2 of the ninth relay are connected by diodes.

6. The switching circuit of claim 4, wherein, The power-on / off circuit also includes: The base of the first transistor is grounded through the second capacitor; And / or the base of the first transistor is connected to the external hot start circuit and the cold start circuit through the first resistor; And / or the base of the first transistor is also grounded through a second resistor; And / or the external hot-start circuit is connected to the base of the first transistor via the first diode; And / or the external cold start circuit is connected to the base of the first transistor via a second diode.

7. The switching circuit of claim 4, wherein the first and second switches are configured to be turned on and off in response to a clock signal. The power-on / off circuit also includes: The base of the second transistor is grounded through the third capacitor; And / or the base of the second transistor is connected to an external shutdown circuit through a third resistor; And / or the base of the second transistor is also grounded through a fourth resistor.

8. The switching circuit of claim 4, wherein, The power-on / off circuit also includes: Pin 5 of the ninth relay is connected to one end of the fifth resistor via the third diode, and the other end of the fifth resistor is connected to the first power supply.

9. The switching circuit of claim 4, wherein, The power-on / off circuit also includes: The negative terminal of the contactor coil of the contactor contact is connected to pin 5 of the fifth relay via the fourth diode.

10. The switching circuit of claim 4, wherein, The first relay, the third relay, the fourth relay, the fifth relay, the eighth relay, the sixth relay, and the seventh relay are all HFD4-I / 24 type relays; And / or the second relay is an HFD4-I / 12 type relay.

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