Diesel engine redundant intelligent one-key starting device for data center power supply

Abstract

The application discloses a diesel engine redundancy intelligent one-key starting device for a data center backup power supply and relates to the field of diesel engines. In the device, a state detection module is provided with a contact current detection circuit connected with a measured starter relay and an electromagnetic switch contact, and a coil voltage detection circuit connected with a relay and an electromagnetic switch coil, which respectively detect the contact on-off and the coil open circuit and short circuit state. After the detection signals are converted by an ADC, the signals are sent to an MCU. The MCU performs logic operation on the starter to realize redundancy grouping, drives a corresponding power drive circuit to realize one-key starting, and sends the coil and contact health state to the whole machine instrument through a state display module and a communication module. The application determines the starter health state in combination with the contact aging, carbon brush wear and pressure drop, implements starting protection, and is provided with an emergency stop emergency repair safety bypass, realizes real-time monitoring and state display of the starting system, is convenient for repair and maintenance, and improves the reliability of the starting system.

Description

Technical Field

[0001] This invention relates to the field of diesel engines, and in particular to a redundant intelligent one-button start device for a high-power multi-cylinder diesel engine. Background Technology

[0002] High-power multi-cylinder diesel engines are widely used in data center backup power systems, undertaking the critical task of ensuring continuous power supply when the mains power is interrupted. Therefore, the engine starting system is required to have redundant starting capability to avoid the risk to the data center backup power supply if the starter, which is a vulnerable component, fails.

[0003] For high-power multi-cylinder engines with 12V, 16V, and 20V power supplies, the starting system typically requires two starters operating in parallel to drive the engine. Redundant starting designs, however, require four starters. Yet, in parallel starting systems, regardless of control signal synchronization, the mechanical transmission mechanism results in inconsistent stress and wear on each starter, inevitably leading to one starter failing first. Therefore, existing redundant starting systems face challenges in managing and controlling multiple starters, determining which two starters should be used, and, in low-temperature environments, whether multiple starters can be deployed simultaneously to improve low-temperature starting capability. Furthermore, while high-power multi-cylinder diesel engines are bulky, the starter installation space is very limited, making maintenance and repair difficult. These factors present higher demands on diesel engine starting systems in data centers.

[0004] Therefore, in addition to meeting the configuration requirements in the structural design, how to effectively manage the operation of multiple starters, how to monitor the working status of each component of the starter in real time and evaluate its health and lifespan have become key issues that urgently need to be solved in redundant starting technology. Summary of the Invention

[0005] The purpose of this invention is to provide a redundant intelligent one-button starter device for high-power multi-cylinder diesel engines. This redundant intelligent control device determines the health status of the starter by arranging detection points at the starter relay, electromagnetic switch, armature, and grounding points, performing static detection on the relay and electromagnetic switch coils, and dynamic monitoring on the relay and electromagnetic switch contacts, as well as the aging of the starter switch contacts, carbon brush wear, and voltage drop. The MCU uses a reasonable algorithm to transmit the starter status via a CAN module and indicator lights to achieve human-machine interaction. Based on the health status of each starter, it performs redundant starting grouping, realizing one-button start of the diesel engine backup power supply in the data center. For abnormal starting conditions, a starting protection strategy is implemented. This redundant intelligent control device transforms the single redundancy in the structural design into double redundancy and triple redundancy, improving efficient management and economy. Furthermore, for low-temperature starting conditions, multiple starters can participate in the operation, improving the engine's low-temperature starting capability.

[0006] To achieve the above objectives, the present invention provides a diesel engine redundant intelligent one-button starter device for data center power supplies, comprising a starter status detection module corresponding to multiple starters, an ADC processing module, an MCU, a power module, a communication module, a starter fault status display module, an external connection interface, a one-button start switch, and a starter power drive module electrically connected to the MCU; each starter status detection module is equipped with a contact current detection circuit and a coil voltage detection circuit. The contact current detection circuit is connected to the starter relay contacts and electromagnetic switch contacts of the starter under test, and is used to detect the on / off state of the contacts. The coil voltage detection circuit... The circuit is connected to the relay coil and electromagnetic switch coil of the starter under test to detect the open circuit and short circuit status of the coils. The voltage analog signals output by each detection circuit are converted into digital signals by the corresponding ADC processing module and then output to the MCU. The MCU performs logical operations on the received coil signals and contact signals, and accordingly performs redundant grouping of the starter. The operation results are converted and output to the four power drive circuits that drive the four starter respectively. At the same time, the health status of the relays, electromagnetic switches, coils and contacts of each starter is output to the status display module and the communication module. The communication module sends the information to the whole instrument communication node according to the preset message protocol.

[0007] Preferably, the power module has two power stages. The input power voltage is 12V-36V, and the power module draws power from the emergency stop switch. The first stage is a wide-range step-down circuit that converts the 12V-36V voltage to 5V. Through a switching power supply topology, it outputs a stable 5V voltage with the help of a power switch, energy storage inductor, freewheeling circuit, and RC filter components. It also has TVS surge protection and separates the power ground from the analog ground. The second stage is a linear regulated power supply that converts the 5V to 3.3V and can be turned on by software. Through a low-dropout linear regulator or switching regulator topology, it outputs a 3.3V regulated power supply with a voltage divider feedback network, filter capacitor, and current limiting components to achieve system hibernation and power-off, and reduce power consumption.

[0008] Preferably, the MCU is a 32-bit microcontroller with multiple ADC acquisition channels and DAC analog output channels, which can realize synchronous acquisition of voltage and current, and includes multiple signal acquisition interfaces, drive output interfaces, communication interfaces and debugging interfaces; the MCU's peripherals include a debugging reset circuit, a crystal oscillator circuit for accurate timing of starter operation, a 3V reference voltage circuit for ADC calibration, a temperature protection circuit using an NTC thermistor, and a debugging start circuit and debugging interface. The debugging interface is used for program configuration and parameter verification.

[0009] Preferably, the contact current detection circuit is equipped with a high-side current shunt monitoring amplifier, which is implemented by a combination of a sampling resistor and a current sensing amplifier. By collecting the voltage across the contact, the voltage is divided and filtered, and then the current sensing amplifier performs level sampling. In conjunction with the RC filter and diode protection circuit, a detection signal is output to determine whether the relay or electromagnetic switch contact is properly engaged, stuck, or disconnected, and the contact state is converted into a digital voltage output to the MCU.

[0010] Preferably, the contact current detection circuit sets up an independent voltage comparison and detection branch for each contact. The contact signal is sampled by the voltage divider resistor and then input to the voltage comparator. The judgment threshold is set by the reference resistor. The RC filter circuit filters out the contact opening and closing arc and electromagnetic interference. The Zener diode suppresses instantaneous high voltage to protect the chip. The voltage comparator outputs a level signal based on the difference between the sampled voltage and the reference voltage, thereby identifying contact opening, closing and sticking faults, and realizing real-time monitoring of the contact operating status.

[0011] Preferably, the coil voltage detection circuit has two symmetrical detection branches, which are respectively connected to the electromagnetic switch coil and the starting relay coil under test. Each branch is connected to the coil via a current-limiting resistor from the power supply end. The rear end of the coil is connected in series with a current-limiting resistor and an isolation diode to the reference potential end. The coil is connected in parallel with a freewheeling diode and a filter capacitor, and together with a grounding resistor, they form a detection loop. A coil test control module is also provided to control the on / off state of the detection loop. The current in the loop is sampled by the resistor, and the coil is determined to be in an open circuit, short circuit, or normal state by sampling the potential of the branch node. The diode and capacitor are used to filter out voltage interference, and the discharge circuit is used to absorb the back electromotive force generated when the coil is de-energized.

[0012] Preferably, each power drive circuit uses a two-stage NMOS switching circuit, including a signal amplification transistor and a controlled power MOSFET, forming two output switches for host activation. After receiving the drive signal from the MCU, the transistor is controlled to turn on through an RC circuit filter, so that the two MOSFETs are turned on synchronously. An absorption circuit is provided to suppress the voltage spike generated when the transistor is turned off, thereby connecting the starter relay coil. After the drive signal is removed, the transistor is de-energized, the MOSFET is turned off, and the coil control signal is disconnected, completing one start-stop control cycle.

[0013] Preferably, the status display module includes a status indication circuit corresponding to the starter motor. Each status indication circuit is independent of the others, driven by an NPN transistor to adapt to the microcontroller output, and uses optocoupler isolation to separate strong and weak currents. It also features diode isolation and an RC structure to improve signal anti-interference capability. The diode array is used to distinguish the health status of the coils and contacts of the relay and electromagnetic switch. The output level of the back-end transistor drives the external indicator light. Each starter motor is equipped with green, red, and yellow LED indicator lights, which switch the illumination state according to the control signal of the MCU to synchronously feedback the status of the coils and contacts of the relay and electromagnetic switch.

[0014] Preferably, the contact current detection circuit uses a combination of a current sensing amplifier and a sampling resistor; the coil voltage detection circuit uses a combination of a resistor and a diode; the temperature protection circuit uses an NTC thermistor; the status display module uses an LED three-color indicator; and the communication module is a CAN communication module.

[0015] Preferably, after receiving the start signal from the one-button start switch, the MCU performs redundant starting grouping based on the health status of each starter: it prioritizes closing the left starters L1 and L2 to start the engine; if either L1 or L2 fails, it closes the right starters R1 and R2 to operate the right starter; if one starter on each side fails, it controls the remaining two normal starters on both sides to work together; if three of the four starters are abnormal, it closes the last healthy starter for emergency starting; under low-temperature starting conditions, multiple starters work together.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] This invention's device determines the starter's health status by arranging detection points at the starter relay, electromagnetic switch, armature, and grounding points to perform static testing on the relay and electromagnetic switch coils and dynamic monitoring on the relay and electromagnetic switch contacts. It also assesses the aging of the starter switch contacts, carbon brush wear, and voltage drop. The MCU, through a reasonable algorithm and based on the health status of each starter, performs redundant starting grouping of the starters, enabling redundant intelligent one-button starting of the diesel engine for data center backup power. For abnormal starting conditions, a starting protection strategy is implemented. The detected health status of the relays and electromagnetic switches is transmitted in real-time to the instrument communication node via a built-in LED multi-color light display (constant on, flashing) or a communication module. This solves the problem of real-time monitoring and health status display of high-power engine starting systems, facilitating the inspection and maintenance of data center backup power engine starting systems. Simultaneously, an emergency stop switch and an emergency maintenance safety bypass design enhance the reliability of the engine starting system. Attached Figure Description

[0018] Figure 1 This is a system diagram of a diesel engine redundancy intelligent one-button start device for data center power supply according to the present invention. Figure 2 This is a control logic block diagram of a diesel engine redundancy intelligent one-button start device for data center power supply according to the present invention. Figure 3 This is a schematic diagram of a diesel engine redundancy intelligent one-button start device for data center power supplies according to the present invention (details provided by [Provider Name]). Figure 4-10 exhibit); Figure 4 for Figure 3 Enlarged view of the part ( Figure 3 (First part from top to bottom on the left) Figure 5 for Figure 3 Enlarged view of the part ( Figure 3 (Second part from top to bottom on the left) Figure 6 for Figure 3 Enlarged view of the part ( Figure 3 (The third part from top to bottom on the left) Figure 7 for Figure 3 Enlarged view of the part ( Figure 3 (First part from top to bottom on the right) Figure 8 for Figure 3 Enlarged view of the part ( Figure 3 (Second part from top to bottom on the right) Figure 9for Figure 3 Enlarged view of the part ( Figure 3 (The third part from top to bottom on the right) Figure 10 for Figure 3 Enlarged view of the part ( Figure 3 (The fourth part from top to bottom on the right) Figure 11 This is a schematic diagram of the starter motor measuring point in a diesel engine redundant intelligent one-button starter device for data center power supply according to the present invention.

[0019] Figure reference numerals: 1. L1 starter status detection module; 11. Starter relay contact detection; 111. Sampling resistor one; 112. Current sensing amplifier one; 12. Electromagnetic switch contact detection; 121. Sampling resistor two; 122. Current sensing amplifier two; 13. Relay coil detection; 14. Electromagnetic switch coil detection; 15. Coil test control module; 16. L1 power drive circuit; 2. L2 starter status detection module; 26. L2 power drive circuit; 3. R1 starter status detection module; 36. R1 power drive circuit; 4. R2 starter status detection module; 46. R2 power drive circuit; 5. MCU; 51. Debugging and reset circuit 52. Crystal oscillator circuit; 53. ADC reference circuit; 54. Temperature protection circuit; 55. Debugging and starting circuit; 56. Debugging interface; 6. Power supply module; 61. 5V power supply module; 62. 3.3V power supply module; 7. CAN communication module; 8. Status display module; 81. L1 starter status display; 82. L2 starter status display; 83. R1 starter status display; 84. R2 starter status display; 9. External connection interface; 91. L1 measuring point; 92. L2 measuring point; 93. R1 measuring point; 94. R2 measuring point; 95. Emergency stop switch; 96. L-side emergency stop maintenance switch; 97. R-side emergency stop maintenance switch; 10. One-button start switch. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 3As shown, this embodiment of the invention provides a high-power multi-cylinder diesel engine redundant intelligent one-button start device, which is applied to the high-power multi-cylinder diesel engine starting system of data center backup power supply. The starting system is structurally configured with four starters, namely left starter L1, left starter L2, right starter R1, and right starter R2.

[0022] The device includes starter status detection modules (L1 starter status detection module 1, L2 starter status detection module 2, R1 starter status detection module 3, R2 starter status detection module 4), ADC processing module, MCU5, power supply module 6, CAN communication module 7, starter fault status display module 8, external connection interface 9, one-button start switch 10, and starter power drive module and emergency stop start-up maintenance circuit electrically connected to MCU5. Each starter status detection module includes a relay and electromagnetic switch contact current detection module (starter relay contact detection 11, electromagnetic switch contact detection 12) connected to the starter relay contacts and electromagnetic switch contacts of the external starter under test, and a relay and electromagnetic switch coil voltage detection module (relay coil detection 13, electromagnetic switch coil detection 14) connected to the relay coil and electromagnetic switch coil of the external starter under test. Each detection module outputs an analog voltage signal to the corresponding ADC voltage processing module and ADC current processing module. The ADC processing module outputs the processed digital signal to MCU5. MCU5 communicates with power supply module 6 and CAN communication module. Module 7, starter fault status display module 8, and each power output module are electrically connected. MCU5 performs logical operations on the received relay, electromagnetic switch coil, and contact signals, and then redundantly groups the four starters in the starting system. The results of the logical operations are converted and output to the power drive modules (L1 power drive circuit 16, L2 power drive circuit 26, R1 power drive circuit 36, R2 power drive circuit 46). It also outputs the health status of the relay and electromagnetic switch coils and contacts to the status display module 8 and CAN communication module 7. CAN communication module 7 sends information to the instrument communication node according to a preset message protocol, enabling human-machine interaction. Furthermore, the device is equipped with a safety bypass in case of module failure, namely an emergency stop start-up maintenance circuit (emergency stop switch 95, L-side emergency stop maintenance switch 96, R-side emergency stop maintenance switch 97). This allows manual operation, disengaging the redundant intelligent one-button start device, to perform engine starting system maintenance, restoring the engine starting to the structurally redundant left-side or right-side start configuration.

[0023] Specifically, such as Figure 4As shown, the test points on the starter motor include the electromagnetic switch terminals 50C, 30, and 45, as well as the negative terminal. Each starter motor is connected to the device through an external connection interface 9. The external connection interface 9 is a multi-channel connector, which corresponds to test points L1 91, L2 92, R1 93, and R2 94. Taking the L1 starter motor as an example, its test point signals include L1-50C+, L1-50C-, L1-50, L1-45, and L1-31. The test points of the other L2, R1, and R2 starter motors correspond to these signals. The device obtains the relay contact signals, relay coil signals, switch contact signals, and switch coil signals of each starter motor through the above test points.

[0024] Power module 6 has two power supply stages with an input voltage of 12V-36V. Power module 6 draws 12V-36V from the emergency stop switch (pin 95). The first stage is a wide-range step-down circuit (5V power module 61) that converts the 12V-36V voltage to 5V using a main control chip. Through a switching power supply topology, power switching transistors, energy storage inductors, freewheeling circuits, and RC filters, it outputs a stable 5V voltage and features TVS surge protection. Power ground and analog ground are separated. The second stage is a controllable, software-enabled linear regulated power supply (3.3V power module 62) that converts 5V to 3.3V. It receives 5V, uses a low-dropout linear regulator or switching regulator topology, and employs a voltage divider feedback network, filter capacitors, and current limiting components to output a regulated 3.3V power supply. This enables system hibernation and power-off, reduces power consumption, and provides multi-stage isolated and regulated power to the subsequent main control chip and peripherals.

[0025] The MCU5 is a 32-bit microcontroller with multiple ADC acquisition channels and DAC analog output channels. It can achieve synchronous voltage and current acquisition and includes a multi-signal acquisition interface, a drive output interface, a communication interface, and a debugging interface. It completes starter relay coil driving, coil and contact status detection, fault diagnosis, and overall machine operation control. The MCU5's peripherals include a debugging reset circuit 51, a high-precision timing crystal oscillator circuit 52 for accurate timing of starter operation, a 3V reference voltage circuit (ADC reference circuit 53) for ADC calibration, a temperature protection circuit 54 using an NTC thermistor, a debugging start circuit 55, and a debugging interface 56. The debugging interface 56 is used for program configuration and parameter verification.

[0026] The relay and electromagnetic switch contact current detection module (starting relay contact detection 11, electromagnetic switch contact detection 12) is equipped with a high-side current shunt monitoring amplifier, specifically implemented by a combination of sampling resistors and current sensing amplifiers. The starting relay contact detection 11 includes sampling resistor 111 and current sensing amplifier 112, while the electromagnetic switch contact detection 12 includes sampling resistor 121 and current sensing amplifier 122. By acquiring the voltage across the contacts, after voltage division and filtering, the current sensing amplifier performs level sampling, which, in conjunction with RC filtering and diode protection circuitry, outputs a detection signal. For signal measurement, independent voltage comparison and detection branches can be set up separately. The contact signal is sampled by voltage divider resistors and then input to the voltage comparator. The threshold is determined by the reference resistor. The RC filter circuit filters out the on / off arc and electromagnetic interference. The Zener diode suppresses instantaneous high voltage to protect the chip. The comparator outputs a level signal based on the difference between the sampled voltage and the reference voltage, thereby determining whether the relay or electromagnetic switch contacts are properly engaged, stuck, or disconnected. The contact status is converted into a digital voltage output to the MCU5 to realize the identification of contact opening, closing, and sticking faults and the real-time monitoring of the contact operation status.

[0027] The relay and electromagnetic switch coil voltage detection module (relay coil detection 13, electromagnetic switch coil detection 14) has two symmetrical detection branches, which are respectively connected to the electromagnetic switch coil under test and the starting relay coil. Each branch is connected to the coil through the power supply end via a current limiting resistor. After the coil, a current limiting resistor and an isolation diode are connected in series to the reference potential end. The coil is connected in parallel with a freewheeling diode and a filter capacitor, which, together with the grounding resistor, form a detection circuit. A coil test control module 15 is provided to control the on / off state of the detection circuit. The circuit current can be sampled by the resistor, and the open circuit, short circuit or normal state of the coil can be determined by sampling the potential of the branch node. The diode and capacitor are used to filter out voltage interference and ensure the stability of the detection signal. The discharge circuit absorbs the back electromotive force of the coil when it is de-energized.

[0028] The power drive circuit (L1 power drive circuit 16, L2 power drive circuit 26, R1 power drive circuit 36, R2 power drive circuit 46) is equipped with a two-stage NMOS switching circuit, including a signal amplification transistor and a controlled power MOSFET, to realize the two-way output switch for host startup; after receiving the drive signal input from MCU5, the transistor is controlled to conduct after being filtered by the RC circuit, and the two MOSFETs conduct synchronously. An absorption circuit is designed to suppress the voltage spike generated when the host is turned off, and the starter relay coil is turned on; after the control signal is removed, the transistor is de-energized, the MOSFET is turned off, and the coil control signal is disconnected, completing one start-stop control.

[0029] The status display module 8 includes status displays for the four starters L1, L2, R1, and R2: L1 starter status display 81, L2 starter status display 82, R1 starter status display 83, and R2 starter status display 84. Each status indicator circuit is independent, driven by NPN transistors to adapt to the microcontroller output. Optical isolation separates strong and weak current signals, eliminating electrical interference. Diode isolation and an RC structure enhance signal anti-interference capabilities. A diode array distinguishes the health status of the relay and solenoid switch coils and contacts. The output level of the rear transistor drives the external indicator lights. Each starter has a green, red, and yellow LED indicator, which switches its illumination state according to the control signal from the MCU5 and synchronously outputs feedback on the relay and solenoid switch coil and contact status, providing independent visual indication of the engine starting redundancy system's operating status. The CAN communication module 7 is an independent transceiver that can transmit monitored fault signals externally via the CAN communication circuit. The one-button start switch 10 is equipped with a one-button start button or is connected to an engine start signal. After the main memory is started, the internal program runs and the device works normally. The one-button start switch 10 can also be the start button for other engine controller systems or whole machine instruments.

[0030] The working process of this embodiment is as follows: After the device is powered on, the power module 6 converts the 12V-36V voltage input from the battery into 5V and 3.3V power supplies to each module. The MCU5 automatically controls the switch to close, and the device performs a self-test. The coil test control module 15 tests the motor starter relays and electromagnetic switch coils of the four starters, obtaining the coil status of each measuring point (L1, L2, R1, R2) and performing logical operations. If all are normal, the corresponding status indicator light will be solid green; if the starter relay coil is abnormal, the corresponding red light will be on; if the electromagnetic switch coil is abnormal, the corresponding red light will flash. When the MCU5 receives the start signal from the engine one-button start switch 10, the MCU5 controls the START switch to close and performs redundant starting grouping of the starters according to their health status, driving the corresponding power output control module accordingly. Figure 2 The control logic shown connects the starter control terminal to start the engine: The left starters L1 and L2 are closed first to start the engine; if any node in L1 or L2 fails, the right switches R1 and R2 are closed, and the right starter operates; if one starter on each side of L1 / L2 and R1 / R2 fails, the remaining two normal starters on both sides can be controlled to work together; if three of L1, L2, R1, and R2 are abnormal, to ensure the power supply safety of the data center, the last healthy starter can be closed for emergency starting; for low-temperature starting conditions, multiple starters can work together to improve the engine's low-temperature starting capability.

[0031] After the starter motor is started by the MCU5, the device dynamically detects the contacts of the relay and solenoid switch during the starting process: the starter relay contact detection 11 uses a relay sampling resistor 111 and a current sensing amplifier 112, and the solenoid switch contact detection 12 uses a relay sampling resistor 121 and a current sensing amplifier 122. The detected contact voltage is amplified and fed back to the MCU5. The MCU5 determines the health status of the relay and solenoid switch contacts based on preset logic operations, combined with the aging of the switch contacts, carbon brush wear, and voltage drop. If the contacts are normal, the corresponding green light illuminates, and the engine continues to start until the start is complete; if the starter relay contacts are faulty or a contact fault is detected, the yellow light remains on; if the solenoid switch contacts are faulty, the yellow light flashes, the start is stopped, and the faulty motor is disabled. The starting process needs to be repeated, thus implementing a starting protection strategy for abnormal starting conditions. Throughout the process, MCU5 outputs the health status of the coils and contacts of the relays and electromagnetic switches to CAN communication module 7 and status display module 8. CAN communication module 7 sends the starter status to the instrument display of the whole machine according to the preset protocol. Status display module 8 directly displays the working status of each component of the starter. Equipment maintenance personnel can promptly perform maintenance and repair of the engine starting system according to the indicated fault points.

[0032] When the detection module fails or the engine starting system needs maintenance, the emergency stop switch 95 can be pressed to disconnect the intelligent control module. Then, the external L-side emergency stop maintenance switch 96 or R-side emergency stop maintenance switch 97 can be used to control the operation of the left and right starters through the emergency maintenance button, so that the engine starting can be restored to the structurally redundant left-side or right-side starting, thereby improving the reliability of the starting system in the case of emergency engine starting or engine maintenance.

[0033] In other embodiments of the present invention, the detection of relay contacts and electromagnetic switch contacts in the starter status detection module can be achieved by a combination of current sensing amplifier and sampling resistor, and the coil continuity detection can be achieved by a combination of resistor and diode, or other combinations thereof; the starter power drive module can be achieved by a combination of two-stage NMOS switching circuit, signal amplification transistor and controlled power MOSFET, or other combinations thereof; the MCU temperature protection circuit 54 can be achieved by a combination of NTC thermistor and other temperature sensing resistors; the starter status display module 8 can be achieved by a combination of LED three-color indicator light and other display methods; the communication module 7 can be achieved by a combination of CAN communication module and other communication protocol modules. All the above variations do not depart from the protection scope of the present invention.

[0034] This invention utilizes detection points arranged at the starter relay, electromagnetic switch, armature, and grounding to perform static detection on the relay and electromagnetic switch coils and dynamic monitoring on the relay and electromagnetic switch contacts. This determines the starter's health status, and the MCU groups the starter into redundant starting groups based on the health status, transforming the single redundancy in the structural design into double and triple redundancy. This enables redundant intelligent one-button start-up of the backup power diesel engine for the data center, solving the problem of real-time monitoring and health status display for high-power engine starting systems. It also facilitates the inspection and maintenance of engine starting systems, while efficiently managing starter operation and improving economy and low-temperature starting capabilities.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A diesel engine redundancy intelligent one-button start device for data center power supplies, characterized in that, The system includes starter status detection modules corresponding to multiple starters, an ADC processing module, an MCU, a power supply module, a communication module, a starter fault status display module, an external connection interface, a one-button start switch, and a starter power drive module electrically connected to the MCU. Each starter status detection module is equipped with a contact current detection circuit and a coil voltage detection circuit. The contact current detection circuit is connected to the starter relay contacts and electromagnetic switch contacts of the starter under test to detect the on / off state of the contacts. The coil voltage detection circuit is connected to the relay coil and electromagnetic switch coil of the starter under test to detect the open / short circuit state of the coil. The voltage analog signals output by each detection circuit are converted into digital signals by the corresponding ADC processing module and then output to the MCU. The MCU performs logical operations on the received coil signals and contact signals, and accordingly performs redundant grouping of the starters. The operation results are converted and output to the four power drive circuits that drive the four starters respectively. At the same time, the health status of the relays and electromagnetic switches of each starter is output to the status display module and the communication module. The communication module sends the information to the whole instrument communication node according to the preset message protocol.

2. The diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The power module has two power stages. The input power voltage is 12V-36V, and the power module draws power from the emergency stop switch. The first stage is a wide-range step-down circuit that converts the 12V-36V voltage to 5V. Through a switching power supply topology, it uses power switching transistors, energy storage inductors, freewheeling circuits, and RC filter components to output a stable 5V voltage. It also features TVS surge protection and separates the power ground from the analog ground. The second stage is a linear regulated power supply that converts the 5V to 3.3V and can be turned on by software. Through a low-dropout linear regulator or switching regulator topology, it uses a voltage divider feedback network, filter capacitors, and current limiting components to output a 3.3V regulated power supply to achieve system hibernation and power-off, and reduce power consumption.

3. The diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The MCU is a 32-bit microcontroller with multiple ADC acquisition channels and DAC analog output channels. It can realize synchronous voltage and current acquisition and includes multiple signal acquisition interfaces, drive output interfaces, communication interfaces and debugging interfaces. The MCU's peripherals include a debugging reset circuit, a crystal oscillator circuit for accurate timing of starter operation, a 3V reference voltage circuit for ADC calibration, a temperature protection circuit using an NTC thermistor, a debugging start circuit and a debugging interface. The debugging interface is used for program configuration and parameter verification.

4. The diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The contact current detection circuit is equipped with a high-side current shunt monitoring amplifier, which is implemented by a combination of a sampling resistor and a current sensing amplifier. By collecting the voltage across the contact, the voltage is divided and filtered, and then the current sensing amplifier performs level sampling. In conjunction with the RC filter and diode protection circuit, the detection signal is output to determine whether the relay or electromagnetic switch contact is properly engaged, stuck, or disconnected, and the contact status is converted into a digital voltage output to the MCU.

5. A diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The contact current detection circuit sets up an independent voltage comparison and detection branch for each contact. The contact signal is sampled by the voltage divider resistor and then input to the voltage comparator. The judgment threshold is set by the reference resistor. The RC filter circuit filters out the contact opening and closing arc and electromagnetic interference. The Zener diode suppresses instantaneous high voltage to protect the chip. The voltage comparator outputs a level signal based on the difference between the sampled voltage and the reference voltage, thereby identifying contact opening, closing and sticking faults, and realizing real-time monitoring of the contact operation status.

6. The diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The coil voltage detection circuit has two symmetrical detection branches, which are respectively connected to the electromagnetic switch coil and the starting relay coil under test. Each branch is connected to the coil via a current-limiting resistor from the power supply end. The rear end of the coil is connected in series with a current-limiting resistor and an isolation diode to the reference potential end. The coil is connected in parallel with a freewheeling diode and a filter capacitor, and together with a grounding resistor, they form a detection loop. A coil test control module is also provided to control the on / off state of the detection loop. The current in the loop is sampled by the resistor, and the coil is determined to be in an open circuit, short circuit, or normal state by sampling the potential of the branch node. The diode and capacitor are used to filter out voltage interference, and the discharge circuit is used to absorb the back electromotive force generated when the coil is de-energized.

7. A diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, Each power drive circuit uses a two-stage NMOS switching circuit, including a signal amplification transistor and a controlled power MOSFET, forming two output switches for host activation. After receiving the drive signal from the MCU, the transistor is controlled to conduct through an RC circuit filter, so that the two MOSFETs conduct synchronously. An absorption circuit is provided to suppress the voltage spikes generated when the transistor is turned off, thereby connecting the starter relay coil. After the drive signal is removed, the transistor is de-energized, the MOSFET is turned off, and the coil control signal is disconnected, completing one start-stop control cycle.

8. A diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, The status display module includes status indication circuits corresponding to the starter motor. Each status indication circuit is independent of the others and is driven by an NPN transistor to adapt to the microcontroller output. Strong and weak current separation is achieved through optocoupler isolation, and diode isolation and RC structure are provided to improve signal anti-interference capability. The diode array is used to distinguish the health status of the coils and contacts of the relay and electromagnetic switch. The corresponding level of the transistor output at the rear drives the external indicator light. Each starter motor is equipped with green, red and yellow three-color LED indicator lights, which switch the light state according to the control signal of the MCU to synchronously feedback the status of the coils and contacts of the relay and electromagnetic switch.

9. A diesel engine redundancy intelligent one-button start device for data center power supply according to claim 3, characterized in that, The contact current detection circuit uses a combination of a current sensing amplifier and a sampling resistor; the coil voltage detection circuit uses a combination of a resistor and a diode; the temperature protection circuit uses an NTC thermistor; the status display module uses an LED three-color indicator; and the communication module is a CAN communication module.

10. A diesel engine redundancy intelligent one-button start device for data center power supply according to claim 1, characterized in that, After receiving the start signal from the one-button start switch, the MCU performs redundant starting grouping based on the health status of each starter: it prioritizes closing the left starters L1 and L2 to start the engine; if either L1 or L2 fails, it closes the right starters R1 and R2 to operate the right starter; if one starter on each side fails, it controls the remaining two normal starters on both sides to work together; if three of the four starters are abnormal, it closes the last healthy starter for emergency starting; under low-temperature starting conditions, multiple starters work together.

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