Dual-power supply system

Abstract

The invention relates to the technical field of power supply, and discloses a dual-power supply system, which comprises a main power supply module and a standby power supply module, the main power supply module is connected with the CPS controller and used for converting alternating current output by an internal coil system of the electromagnetic transmission mechanism into stable direct current suitable for working of the CPS controller and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller; and the standby power supply module is respectively connected with the main power supply module and the CPS controller, and is used for converting external alternating current into stable direct current suitable for working of the CPS controller when the main power supply module is powered off, and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller. According to the invention, automatic switching and switching of the standby power supply module can be realized, and the CPS controller can work normally in any working state.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a dual power supply system. Background Art

[0002] In the related art, the power supply mode of the ZKB type control and protective switching device (Control and Protective Switching Device, referred to as CPS) is mainly as follows: when the device handle is in the closed position, the primary winding of the coil of the electromagnetic transmission mechanism is loaded with 220V AC power, and the secondary winding end outputs 17V AC as the working power supply of the CPS controller. At the same time, after a series of linkages, the main circuit is connected and the load is powered. When a fault occurs or the load stops, when the device handle is in the tripped or open position, the operating mechanism disconnects the coil of the electromagnetic transmission mechanism from the AC power through related linkages, and the CPS controller is powered off, and the main circuit is powered off, and the load is powered off.

[0003] However, the above power supply method has the following disadvantages: First, when the main circuit is powered off, the CPS controller will also be powered off. When the main circuit is powered on again, the load may not start normally or run unstably, affecting the normal operation and efficiency of the load; Second, the CPS controller plays a safety protection role. After power failure, the safety performance of the load may be reduced, posing a safety hazard; Third, after the CPS controller is powered off, the difficulty of fault diagnosis increases, and more time and manpower costs may be required to troubleshoot the fault. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a dual power supply system to solve the technical problem in the related art that the main circuit and the CPS controller are simultaneously powered off when the device handle is in the tripped or open position.

[0005] The present invention provides a dual power supply system, the system comprising: a main power supply module, a backup power supply module;

[0006] A main power supply module, connected to the CPS controller, for converting the alternating current output by the coil system inside the electromagnetic transmission mechanism into a stable direct current suitable for the operation of the CPS controller, and inputting the stable direct current into the CPS controller to power the CPS controller;

[0007] The backup power supply module is connected to the main power supply module and the CPS controller respectively, and is used to convert external AC power into stable DC power suitable for the operation of the CPS controller when the main power supply module is powered off, and input the stable DC power into the CPS controller to power the CPS controller.

[0008] In an optional embodiment, the main power supply module is also connected to the communication module, and is used to convert the alternating current output by the coil system inside the electromagnetic transmission mechanism into a stable direct current suitable for the operation of the communication module, and input the stable direct current into the communication module to power the communication module;

[0009] The backup power supply module is also connected to the communication module, and is used to convert external AC power into stable DC power suitable for the operation of the communication module when the main power supply module is powered off, and input the stable DC power into the communication module to power the communication module.

[0010] In an optional implementation, the main power supply module includes: a first input terminal, a first rectifying unit, a first filtering unit, a voltage stabilizing unit, and a second filtering unit;

[0011] The first input terminal is connected to the output end of the internal coil system of the electromagnetic transmission mechanism, and is used to obtain the alternating current output by the internal coil system of the electromagnetic transmission mechanism;

[0012] The first rectifier unit is connected to the first input terminal and is used to convert the alternating current output by the coil system inside the electromagnetic transmission mechanism into direct current;

[0013] The first filtering unit is connected to the first rectifying unit and is used to filter the direct current;

[0014] The voltage stabilizing unit is connected to the first filtering unit and is used to convert the filtered direct current into direct current suitable for operation of the CPS controller or the communication module;

[0015] The second filtering unit is connected to the voltage stabilizing unit and is used to perform secondary filtering on the DC power suitable for the operation of the CPS controller or the communication module to obtain stable DC power suitable for the operation of the CPS controller or the communication module.

[0016] In an optional implementation, the backup power supply module includes: a second input terminal, a second rectifier unit, a power switching unit, a first filter unit, a voltage stabilizing unit, and a second filter unit;

[0017] The second input terminal is used to obtain external AC power;

[0018] The second rectifying unit is connected to the second input terminal and is used to convert external alternating current into direct current;

[0019] The power switching unit is connected to the second rectifying unit and the first filtering unit respectively, and is used to output the direct current to the first filtering unit.

[0020] The first filtering unit is used to filter the direct current output by the power switching unit;

[0021] The voltage stabilizing unit is connected to the first filtering unit and is used to convert the filtered direct current into direct current suitable for operation of the CPS controller or the communication module;

[0022] The second filtering unit is connected to the voltage stabilizing unit and is used to perform secondary filtering on the DC power suitable for the operation of the CPS controller or the communication module to obtain stable DC power suitable for the operation of the CPS controller or the communication module.

[0023] In an optional implementation, the first input terminal includes: a first power input interface terminal; the first rectifying unit includes: a first rectifying bridge and a first diode;

[0024] The first power input interface terminal is respectively connected to the output end of the coil system inside the electromagnetic transmission mechanism, the first pin and the second pin of the first rectifier bridge, the third pin of the first rectifier bridge is connected to one end of the first diode, the other end of the first diode and the fourth pin of the first rectifier bridge are both connected to the first filtering unit, and the fourth pin of the first rectifier bridge is directly grounded;

[0025] The second input terminal includes: a second power input interface terminal; the second rectifier unit includes: a second rectifier bridge;

[0026] The second power input interface terminal is connected to the external AC output terminal, the first pin and the second pin of the second rectifier bridge, the third pin and the fourth pin of the second rectifier bridge are both connected to the power switching unit, and the fourth pin of the first rectifier bridge is also directly grounded.

[0027] In an optional implementation, the first filtering unit includes: a first capacitor and a second capacitor;

[0028] One end of the first capacitor is connected to the other end of the first diode and one end of the second capacitor, the other end of the first capacitor is respectively connected to the fourth pin of the first rectifier bridge and the other end of the second capacitor and directly grounded, and both ends of the first capacitor and both ends of the second capacitor are also connected to the voltage stabilizing unit.

[0029] In an optional implementation, the voltage stabilizing unit includes: a three-terminal voltage regulator, a first resistor and a second resistor;

[0030] The Vin terminal of the three-terminal regulator is connected to one end of the first capacitor, one end of the second capacitor, and the other end of the first diode; the ADJ terminal of the three-terminal regulator is respectively connected to one end of the first resistor and one end of the second resistor, and the other end of the second resistor is respectively connected to the Vout terminal of the three-terminal regulator and the second filtering circuit; the other end of the first resistor is respectively connected to the second filtering circuit, the other end of the first capacitor, the other end of the second capacitor, and the fourth pin of the first rectifier bridge and is directly grounded.

[0031] In an optional implementation, the second filtering unit includes: a third capacitor, a fourth capacitor and a third resistor;

[0032] One end of the third capacitor is respectively connected to the Vout end of the three-terminal regulator, the other end of the second resistor, one end of the fourth capacitor, and one end of the third resistor, and the other end of the third capacitor is respectively connected to the other end of the fourth capacitor, the other end of the third resistor, the other end of the first resistor, the other end of the first capacitor, the other end of the second capacitor, and the fourth pin of the first rectifier bridge and directly grounded.

[0033] In an optional implementation, the power switching unit includes: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first NPN transistor, a second NPN transistor, a fifth capacitor, and a second diode;

[0034] The emitter of the second NPN transistor is connected to the third pin of the second rectifier bridge and one end of the fourth resistor respectively, the base of the second NPN transistor is connected to the other end of the fourth resistor and one end of the fifth resistor respectively, the other end of the fifth resistor is connected to the collector of the first NPN transistor, the collector of the second NPN transistor is connected to one end of the second diode, the other end of the second diode is connected to one end of the first diode, the base of the first NPN transistor is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to one end of the seventh resistor and one end of the eighth resistor respectively, the other end of the seventh resistor is connected to one end of the fifth capacitor, the emitter of the first NPN transistor is connected to the first pin of the second rectifier bridge, the other end of the eighth resistor, and the other end of the fifth capacitor respectively and directly grounded, and one end of the seventh resistor and the fifth capacitor are also connected to the other end of the first diode.

[0035] It can be seen from the above technical solutions that the present invention has the following advantages:

[0036] In the embodiment of the present invention, on the basis of using the main power supply module as the main power supply to power the CPS controller, a backup power supply module is added as a backup power supply. When the main power supply module is disconnected due to a main circuit failure or a load shutdown, the backup power supply module is automatically switched and put into operation, ensuring that the CPS controller can work normally in any working state, avoiding data loss, other equipment failures, safety hazards and other problems caused by power failure of the CPS controller, greatly improving the reliability and stability of the equipment, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of a dual power supply system provided by an embodiment of the present invention;

[0039] Figure 2 is a circuit schematic diagram of a main power supply module provided by an embodiment of the present invention;

[0040] Figure 3 It is a partial circuit schematic diagram of the backup power supply module provided in an embodiment of the present invention. Description of the drawings:

[0042] 1. Main power supply module; 101. First input terminal; 102. First rectifier unit; 103. First filter unit; 104. Voltage stabilizing unit; 105. Second filter unit; 2. Backup power supply module; 201. Second input terminal; 202. Second rectifier unit; 203. Power switching unit; P1. First power input interface terminal; P2. Second power input interface terminal; D2. Second rectifier bridge; VD9. First diode; VD8. Second diode; C1. First capacitor; C2. Second capacitor; C3. Third capacitor; C4. Fourth capacitor; C19. Fifth capacitor; IC1. Three-terminal voltage regulator; R26. First resistor; R27. Second resistor; R1. Third resistor; R28. Fourth resistor; R32. Fifth resistor; R29. Sixth resistor; R30. Seventh resistor; R31. Eighth resistor; Q1. First NPN transistor; Q2. Second NPN transistor. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] The embodiment of the present invention provides a dual power supply system, which is suitable for providing a stable power supply for various electronic devices, and is particularly suitable for providing a stable power supply for a CPS controller in a ZKB type control and protective switching device (CPS for short).

[0048] Figure 1 is a schematic diagram of a dual power supply system according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a dual power supply system, including: a main power supply module 1 and a backup power supply module 2.

[0049] Specifically, the main power supply module 1 is connected to the CPS controller, and the main power supply module 1 is used to convert the AC power output by the internal coil system of the electromagnetic transmission mechanism into a stable DC power suitable for the operation of the CPS controller, and input the stable DC power to the CPS controller to power the CPS controller. The backup power supply module 2 is connected to the main power supply module and the CPS controller respectively, and the backup power supply module 2 is used to convert the external AC power into a stable DC power suitable for the operation of the CPS controller when the main power supply module 1 is powered off, and input the DC power to the CPS controller to power the CPS controller.

[0050] The AC power output by the coil system inside the electromagnetic transmission mechanism is used to provide power input for the main power supply module 1, and can be the AC power output by the secondary winding end of the coil of the electromagnetic transmission mechanism when the device handle is in the closed position. In one example, when the device handle is in the closed position, the primary winding of the coil of the electromagnetic transmission mechanism can be selectively loaded with multiple voltages such as AV220V, AC380V or DC36V, and the secondary winding end outputs AC power of about 17V.

[0051] The external AC power is used to provide power input for the backup power supply module 2, and can be an external industrial AC power supply of about 12V AC or DC.

[0052] The main power supply module 1 supplies power to the CPS controller normally when the main circuit and the load are in normal working state.

[0053] When the main circuit fails or the load is shut down, the main power supply module 1 is disconnected. At this time, the dual power supply system can automatically switch to the backup power supply module 2 to supply power to the CPS controller.

[0054] In the embodiment of the present invention, on the basis of using the main power supply module as the main power supply to power the CPS controller, a backup power supply module is added as a backup power supply. When the main power supply module is disconnected due to a main circuit failure or a load shutdown, the backup power supply module is automatically switched and put into operation, ensuring that the CPS controller can work normally in any working state, avoiding data loss, other equipment failures, safety hazards and other problems caused by power failure of the CPS controller, greatly improving the reliability and stability of the equipment, and reducing maintenance costs.

[0055] In an optional embodiment, the main power supply module 1 is also connected to the communication module, and the main power supply module 1 is used to convert the AC power output by the internal coil system of the electromagnetic transmission mechanism into a stable DC power suitable for the operation of the communication module, and input the stable DC power to the communication module to power the communication module. The backup power supply module 2 is also connected to the communication module, and the backup power supply module 2 is used to convert the external AC power into a stable DC power suitable for the operation of the communication module when the main power supply module 1 is powered off, and input the stable DC power to the communication module to power the communication module.

[0056] Among them, the communication module is used for information exchange between the CPS controller and the host computer. The host computer can send control instructions to the CPS controller through the communication module to set parameters for each module in the CPS or perform related operations on the control CPS. The CPS controller can also feed back relevant information to the host computer through the communication module, so that the host computer can monitor the parameters and working status of each module in the CPS in real time.

[0057] In the embodiment of the present invention, on the basis of using the main power supply module as the main power supply to power the communication module, a backup power supply module is added as a backup power supply. When the main power supply module is disconnected due to a main circuit failure or the load is shut down, the backup power supply module is automatically switched and put into operation, thereby achieving a continuous communication state between the CPS control and the host computer, ensuring that the host computer can monitor the status and parameters of the CPS controller and other modules in the CPS under any working state, which is beneficial for background personnel to troubleshoot and maintain related equipment, so that the equipment can continue to work safely and reliably.

[0058] In an optional embodiment, if Figure 2 As shown, the main power supply module 1 includes: a first input terminal 101, a first rectifying unit 102, a first filtering unit 103, a voltage stabilizing unit 104 and a second filtering unit 105;

[0059] Specifically, the first input terminal 101 is connected to the output end of the internal coil system of the electromagnetic transmission mechanism, and the first input terminal 101 is used to obtain the alternating current output by the internal coil system of the electromagnetic transmission mechanism; the first rectifier unit 102 is connected to the first input terminal 101, and the first rectifier unit 102 is used to convert the alternating current output by the internal coil system of the electromagnetic transmission mechanism into direct current; the first filter unit 103 is connected to the first rectifier unit 102, and the first filter unit 103 is used to filter the direct current; the voltage stabilizing unit 104 is connected to the first filter unit 103, and the voltage stabilizing unit 104 is used to convert the filtered direct current into direct current suitable for the operation of the CPS controller or the communication module; the second filter unit 105 is connected to the voltage stabilizing unit 104, and is used to perform secondary filtering on the direct current suitable for the operation of the CPS controller or the communication module to obtain stable direct current suitable for the operation of the CPS controller or the communication module.

[0060] In an optional embodiment, if Figure 3 As shown, the backup power supply module 2 includes: a second input terminal 201 , a second rectifying unit 202 , a power switching unit 203 , a first filtering unit 103 , a voltage stabilizing unit 104 and a second filtering unit 105 .

[0061] Specifically, the second input terminal 201 is used to obtain external AC power; the second rectifier unit 202 is connected to the second input terminal 201, and the second rectifier unit 202 is used to convert the external AC power into DC power; the power switching unit 203 is connected to the second rectifier unit 202 and the first filtering unit 103 respectively, and the power switching unit 203 is used to output DC power to the first filtering unit 103; the first filtering unit 103 is used to filter the DC power output by the power switching unit 203; the voltage stabilizing unit 104 is connected to the first filtering unit 103, and the voltage stabilizing unit 104 is used to convert the filtered DC power into DC power suitable for the operation of the CPS controller or the communication module; the second filtering unit 105 is connected to the voltage stabilizing unit 104, and the second filtering unit 105 is used to perform secondary filtering on the DC power suitable for the operation of the CPS controller or the communication module to obtain stable DC power suitable for the operation of the CPS controller or the communication module.

[0062] It should be noted that the first filtering unit 103 , the voltage stabilizing unit 104 and the second filtering unit 105 are common circuit parts of the main power supply module 1 and the backup power supply module 2 .

[0063] Among them, when the main circuit and the load are in normal working state, the main power supply module 1 obtains the AC power output by the internal coil system of the electromagnetic transmission mechanism, and rectifies, filters, stabilizes, and filters again the AC power output by the internal coil system of the electromagnetic transmission mechanism to obtain stable DC power suitable for the operation of the CPS controller or the communication module, and then supplies power to the CPS controller and the communication module. When the main circuit fails or the load is shut down, the main power supply module 1 is disconnected, that is, the first rectifier unit 102 and the first filter unit 103 are disconnected. At this time, the second input terminal 201, the second rectifier unit 202 and the power switching unit 203 of the backup power supply module 2 are connected to the output end of the first filter unit 103, and the external AC power is rectified, filtered, stabilized and filtered twice to obtain stable DC power suitable for the operation of the CPS controller or the communication module, and then the CPS controller and the communication module are supplied with power, thereby realizing the automatic switching of the dual power supply system.

[0064] In an optional embodiment, if Figure 2 and Figure 3 As shown, the first input terminal 101 includes: a first power input interface terminal P1; the first rectifying unit 102 includes: a first rectifying bridge D1 and a first diode VD9.

[0065] The first power input interface terminal P1 is respectively connected to the output end of the internal coil system of the electromagnetic transmission mechanism and the first pin and the second pin of the first rectifier bridge D1. The third pin of the first rectifier bridge D1 is connected to one end of the first diode VD9. The other end of the first diode VD9 and the fourth pin of the first rectifier bridge D1 are both connected to the first filtering unit 103. The fourth pin of the first rectifier bridge D1 is directly grounded.

[0066] The input ends of the first power input interface terminal P1 are connected to the output ends of the coil system inside the electromagnetic transmission mechanism, and can be used as the power input of the main power supply module 1 .

[0067] In an optional implementation, the first output port of the first power input interface terminal P1 is connected to the second pin of the first rectifier bridge D1 , and the second output port of the first power input interface terminal P1 is connected to the first pin of the first rectifier bridge D1 .

[0068] The second input terminal 201 includes: a second power input interface terminal P2; the second rectifier unit 202 includes: a second rectifier bridge D2;

[0069] The second power input interface terminal P2 is connected to the external AC output terminal, the first pin and the second pin of the second rectifier bridge, the third pin and the fourth pin of the second rectifier bridge are both connected to the power switching unit 203, and the fourth pin of the first rectifier bridge is also directly grounded.

[0070] Among them, the input ends of the second power input interface terminal P2 are connected to the output ends of the external industrial AC power supply, and can be used as the power input of the backup power supply module 2.

[0071] In an optional implementation, the first output port of the second power input interface terminal P2 is connected to the second pin of the second rectifier bridge D2, and the second output port of the second power input interface terminal P2 is connected to the first pin of the second rectifier bridge D2.

[0072] In an optional embodiment, if Figure 2 As shown, the first filtering unit 103 includes: a first capacitor C1 and a second capacitor C2;

[0073] One end of the first capacitor C1 is connected to the other end of the first diode VD9 and one end of the second capacitor C2, the other end of the first capacitor C1 is respectively connected to the fourth pin of the first rectifier bridge D1 and the other end of the second capacitor C2 and directly grounded, and both ends of the first capacitor C1 and both ends of the second capacitor C2 are also connected to the voltage stabilizing unit 104.

[0074] The first capacitor C1 is preferably an electrolytic capacitor, and the second capacitor C2 is preferably a common capacitor.

[0075] In an optional embodiment, if Figure 2 As shown, the voltage stabilizing unit 104 includes: a three-terminal voltage regulator IC1, a first resistor R26 and a second resistor R27;

[0076] The Vin terminal (input terminal) of the three-terminal voltage regulator IC1 is connected to one end of the first capacitor C1, one end of the second capacitor C2, and the other end of the first diode VD9; the ADJ terminal (adjustment terminal) of the three-terminal voltage regulator IC1 is respectively connected to one end of the first resistor R26 and one end of the second resistor R27, and the other end of the second resistor R27 is respectively connected to the Vout terminal (output terminal) of the three-terminal voltage regulator IC1 and the second filtering unit 105; the other end of the first resistor R26 is respectively connected to the second filtering unit 105, the other end of the first capacitor C1, the other end of the second capacitor C2, and the fourth pin of the first rectifier bridge and is directly grounded.

[0077] In an optional embodiment, if Figure 2 As shown, the second filtering unit 105 includes: a third capacitor C3, a fourth capacitor C4 and a third resistor R1;

[0078] One end of the third capacitor C3 is respectively connected to the Vout end of the three-terminal regulator IC1, the other end of the second resistor R27, one end of the fourth capacitor C4, and one end of the third resistor R1, as a working power supply for the CPS controller and the communication module; the other end of the third capacitor C3 is respectively connected to the other end of the fourth capacitor C4, the other end of the third resistor R1, the other end of the first resistor R26, the other end of the first capacitor C1, the other end of the second capacitor C2, and the fourth pin of the first rectifier bridge D1 and is directly grounded.

[0079] In an optional embodiment, if Figure 3 As shown, the power switching unit 203 includes: a fourth resistor R28, a fifth resistor R32, a sixth resistor R29, a seventh resistor R30, an eighth resistor R31, a first NPN transistor Q1, a second NPN transistor Q2, a fifth capacitor C19, and a second diode VD8.

[0080] Among them, the emitter of the second NPN transistor Q2 is respectively connected to the third pin of the second rectifier bridge D2 and one end of the fourth resistor R28, the base of the second NPN transistor Q2 is respectively connected to the other end of the fourth resistor R28 and one end of the fifth resistor R32, the other end of the fifth resistor R32 is connected to the collector of the first NPN transistor Q1, the collector of the second NPN transistor Q2 is connected to one end of the second diode VD8, and the other end of the second diode VD8 is connected to one end of the first diode VD9, which is used to switch the backup power supply module 2 as the input working When the power is turned on, the base of the first NPN transistor Q1 is connected to one end of the sixth resistor R29, the other end of the sixth resistor R29 is respectively connected to one end of the seventh resistor R30 and one end of the eighth resistor R31, the other end of the seventh resistor R30 is connected to one end of the fifth capacitor C19, the emitter of the first NPN transistor Q1 is respectively connected to the first pin of the second rectifier bridge D2, the other end of the eighth resistor R31, and the other end of the fifth capacitor C19 and directly grounded, one end of the seventh resistor R30 and the fifth capacitor C19 are also connected to the other end of the first diode VD9.

[0081] In an optional implementation, the cathode of the second diode VD8 is connected to the cathode of the first diode VD9, and one end of the seventh resistor R30 and the fifth capacitor C19 are also connected to the anode of the first diode VD9.

[0082] The working principle of automatic switching of the backup power supply module is explained as follows:

[0083] The main power supply module is put into operation: the power output from the secondary winding of the coil in the electromagnetic transmission mechanism is used as the main power supply for the CPS controller. After the first rectifier bridge D1 outputs a DC voltage, it acts on the eighth resistor R31 (also called a sampling resistor) in the backup power supply module. After a certain current flows through the base of the first NPN transistor Q1, the first NPN transistor Q1 is turned on; the backup power supply module obtains the external industrial AC power supply, rectifies the output DC voltage through the second rectifier bridge D2, and then acts on the emitter of the second NPN transistor Q2. At this time, the base current of the second NPN transistor Q2 is too small to turn it on, and the cathode of the second diode VD8 has no voltage output. At this time, the voltage at the input end (Vin end) of the three-terminal voltage regulator IC1 only comes from the main power supply module, and then after filtering, voltage regulation, secondary filtering and other steps, it provides a stable and reliable working power supply for the CPS controller and the communication module.

[0084] The main power supply module is disconnected and the backup power supply module is put into operation: when the main power supply module is disconnected, there is no voltage across the eighth resistor R31, that is, the sampling resistor, and there is no current at the base of the first NPN transistor Q1, so the first NPN transistor Q1 is not turned on. The backup power supply module outputs a DC voltage after rectification by the second rectifier bridge D2 and acts on the emitter of the second NPN transistor Q2. At this time, a certain current flows through the base of the second NPN transistor Q2 to make it turned on, and the cathode end of the second diode VD8 outputs a voltage. At this time, the voltage at the input end (Vin end) of the three-terminal voltage regulator IC1 only comes from the backup power supply module, and then after filtering, voltage regulation, secondary filtering and other steps, the output power provides a stable and reliable working power supply for the CPS controller and the communication module, thereby achieving the purpose of sustainable operation.

[0085] In summary, the embodiment of the present invention uses the main power supply module as the main power supply to power the CPS controller, and adds a backup power supply module as a backup power supply. When the main power supply module is disconnected due to a main circuit failure or the load shutdown state, the backup power supply module is automatically switched and put into operation, ensuring that the CPS controller can work normally in any working state, avoiding data loss, other equipment failures, safety hazards and other problems caused by power failure of the CPS controller, greatly improving the reliability and stability of the equipment, and reducing maintenance costs.

[0086] Although example embodiments and their advantages have been described in detail, those skilled in the art may make various changes, substitutions and modifications to these embodiments without departing from the spirit and defined scope of the present invention, and such modifications and variations are all within the defined scope.

Claims

1. A dual power supply system, characterized in that: The system comprises: a main power supply module and a backup power supply module; A main power supply module, connected to the CPS controller, for converting the alternating current output by the coil system inside the electromagnetic transmission mechanism into a stable direct current suitable for the operation of the CPS controller, and inputting the stable direct current into the CPS controller to power the CPS controller; The backup power supply module is connected to the main power supply module and the CPS controller respectively, and is used to convert external AC power into stable DC power suitable for the operation of the CPS controller when the main power supply module is powered off, and input the stable DC power into the CPS controller to power the CPS controller.

2. The system according to claim 1, characterized in that The main power supply module is also connected to the communication module, and is used to convert the alternating current output by the coil system inside the electromagnetic transmission mechanism into a stable direct current suitable for the operation of the communication module, and input the stable direct current into the communication module to power the communication module; The backup power supply module is also connected to the communication module, and is used to convert external AC power into stable DC power suitable for the operation of the communication module when the main power supply module is powered off, and input the stable DC power into the communication module to power the communication module.

3. The system according to claim 2, characterized in that The main power supply module comprises: a first input terminal, a first rectifying unit, a first filtering unit, a voltage stabilizing unit and a second filtering unit; The first input terminal is connected to the output end of the internal coil system of the electromagnetic transmission mechanism, and is used to obtain the alternating current output by the internal coil system of the electromagnetic transmission mechanism; The first rectifier unit is connected to the first input terminal and is used to convert the alternating current output by the coil system inside the electromagnetic transmission mechanism into direct current; The first filtering unit is connected to the first rectifying unit and is used to filter the direct current; The voltage stabilizing unit is connected to the first filtering unit and is used to convert the filtered direct current into direct current suitable for operation of the CPS controller or the communication module; The second filtering unit is connected to the voltage stabilizing unit and is used to perform secondary filtering on the DC power suitable for the operation of the CPS controller or the communication module to obtain stable DC power suitable for the operation of the CPS controller or the communication module.

4. The system according to claim 3, characterized in that The backup power supply module includes: a second input terminal, a second rectifying unit, a power switching unit, a first filtering unit, a voltage stabilizing unit and a second filtering unit; The second input terminal is used to obtain external alternating current; The second rectifying unit is connected to the second input terminal and is used to convert external alternating current into direct current; The power switching unit is connected to the second rectifying unit and the first filtering unit respectively, and is used to output the direct current to the first filtering unit; The first filtering unit is used to filter the direct current output by the power switching unit; The voltage stabilizing unit is connected to the first filtering unit and is used to convert the filtered direct current into direct current suitable for operation of the CPS controller or the communication module; The second filtering unit is connected to the voltage stabilizing unit and is used to perform secondary filtering on the DC power suitable for the operation of the CPS controller or the communication module to obtain stable DC power suitable for the operation of the CPS controller or the communication module.

5. The system according to claim 4, characterized in that The first input terminal includes: a first power input interface terminal; the first rectifying unit includes: a first rectifying bridge and a first diode; The first power input interface terminal is respectively connected to the output end of the coil system inside the electromagnetic transmission mechanism, the first pin and the second pin of the first rectifier bridge, the third pin of the first rectifier bridge is connected to one end of the first diode, the other end of the first diode and the fourth pin of the first rectifier bridge are both connected to the first filtering unit, and the fourth pin of the first rectifier bridge is directly grounded; The second input terminal includes: a second power input interface terminal; the second rectifier unit includes: a second rectifier bridge; The second power input interface terminal is connected to the external AC output terminal, the first pin and the second pin of the second rectifier bridge, the third pin and the fourth pin of the second rectifier bridge are both connected to the power switching unit, and the fourth pin of the first rectifier bridge is also directly grounded.

6. The system according to claim 5, characterized in that The first filtering unit includes: a first capacitor and a second capacitor; One end of the first capacitor is connected to the other end of the first diode and one end of the second capacitor, the other end of the first capacitor is respectively connected to the fourth pin of the first rectifier bridge and the other end of the second capacitor and directly grounded, and both ends of the first capacitor and both ends of the second capacitor are also connected to the voltage stabilizing unit.

7. The system according to claim 6, characterized in that The voltage stabilizing unit comprises: a three-terminal voltage stabilizer, a first resistor and a second resistor; The Vin terminal of the three-terminal regulator is connected to one end of the first capacitor, one end of the second capacitor, and the other end of the first diode; the ADJ terminal of the three-terminal regulator is respectively connected to one end of the first resistor and one end of the second resistor, and the other end of the second resistor is respectively connected to the Vout terminal of the three-terminal regulator and the second filtering circuit; the other end of the first resistor is respectively connected to the second filtering circuit, the other end of the first capacitor, the other end of the second capacitor, and the fourth pin of the first rectifier bridge and is directly grounded.

8. The system according to claim 7, characterized in that The second filtering unit includes: a third capacitor, a fourth capacitor and a third resistor; One end of the third capacitor is respectively connected to the Vout end of the three-terminal regulator, the other end of the second resistor, one end of the fourth capacitor, and one end of the third resistor, and the other end of the third capacitor is respectively connected to the other end of the fourth capacitor, the other end of the third resistor, the other end of the first resistor, the other end of the first capacitor, the other end of the second capacitor, and the fourth pin of the first rectifier bridge and directly grounded.

9. The system according to claim 8, characterized in that The power switching unit includes: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first NPN transistor, a second NPN transistor, a fifth capacitor, and a second diode; The emitter of the second NPN transistor is connected to the third pin of the second rectifier bridge and one end of the fourth resistor respectively, the base of the second NPN transistor is connected to the other end of the fourth resistor and one end of the fifth resistor respectively, the other end of the fifth resistor is connected to the collector of the first NPN transistor, the collector of the second NPN transistor is connected to one end of the second diode, the other end of the second diode is connected to one end of the first diode, the base of the first NPN transistor is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to one end of the seventh resistor and one end of the eighth resistor respectively, the other end of the seventh resistor is connected to one end of the fifth capacitor, the emitter of the first NPN transistor is connected to the first pin of the second rectifier bridge, the other end of the eighth resistor, and the other end of the fifth capacitor respectively and directly grounded, and one end of the seventh resistor and the fifth capacitor are also connected to the other end of the first diode.

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