Continuous starting control device for multiple starting motors and control method thereof

Abstract

The invention discloses a multi-starting-motor continuous starting control device and a control method thereof, and belongs to the technical field of teaching equipment. The system is characterized by comprising a power supply unit which is formed by connecting a plurality of AC / DC power supply modules in parallel; the input end of the power supply unit is connected with a 220V power supply. Each AC / DC power supply module converts AC 220V into DC 12V and then outputs the DC 12V. The motor unit is formed by connecting a plurality of starting motors in parallel; the input end of the motor unit is connected with the output end of the power supply unit, and a 12V power supply is connected to the starting motor; and the power supply end of the control unit is connected with a 220V power supply, and the control unit comprises a main control unit and is used for controlling the working state of each starting motor in the motor unit. According to the invention, the requirement that related experimental training courses of the starting motor need multiple times of high-frequency starting can be met, continuous experimental training of multiple classes and multiple groups of students can be met, if overcurrent or undervoltage occurs in the starting process, automatic disconnection can be realized, starting data of the starting motor can be recorded, and working parameters of the starting motor can be set.

Description

Technical Field

[0001] The invention relates to a multi-starter motor continuous starting control device and a control method thereof, belonging to the technical field of teaching equipment. Background Art

[0002] The starter motor is an important component to ensure the successful start of the engine. At the same time, the starter motor is the device with the largest instantaneous current that consumes the vehicle battery. When investigating automobile-related majors in vocational colleges, it was found that when conducting teaching experiments and training related to starter motors, the starter motor is generally powered by a car battery plus a fuse with a multimeter and an ammeter. This method has the following problems: 1. The starter motor requires a large current at the moment of starting, which is on the order of several hundred amperes. A battery can be started at most three times, otherwise it will cause permanent damage to the battery, thus failing to meet the requirements of multiple high-frequency starting in the experimental training courses related to the starter motor; 2. When multiple classes and groups of students conduct experimental training, multiple batteries are needed. However, batteries are flammable and explosive, with high storage requirements and low safety factors. Generally, experimental training rooms will not store multiple batteries. Even if some laboratories have multiple batteries, after three starts, the charging speed is slow and cannot catch up with the subsequent class experimental training in time; 3. During the starting process, the system is protected by only a single fuse. Due to different manufacturing processes and manufacturers, the time and current of the fuse cannot be controlled. Once overcurrent occurs during the starting process and the fuse fails to blow in time, the starting motor and battery will burn out. 4. The entire working process of the starting motor can generally be completed in 3-5 seconds. The voltage and current parameters change very quickly. The course needs to analyze the peak current, voltage and other parameters during the starting process. Ordinary multimeters and ammeters cannot record the entire change process, which affects the subsequent collation and analysis of experimental process data; 5. Some experiments in the starter motor innovation course are more complicated, involving the need for a motor to be started multiple times at intervals, and the length of each start and the interval time before and after must be precisely controlled. This requires the starter motor control system to have programmable capabilities, so that experimenters can program the entire experimental control process in the system in advance and then carry out the experiment. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a continuous starting control device for multiple starter motors and a control method thereof, which can meet the requirements of starter motor-related experimental training courses for multiple motors to be started multiple times at high frequency, and can meet the continuous experimental training of multiple classes and multiple groups of students. If overcurrent or undervoltage occurs during the starting process, the device can be automatically disconnected, the starting data of each starter motor can be recorded, and the starting current, power supply time, and segmented power supply time interval and other working parameters of each starter motor can be set, thereby meeting the requirements of experimental courses that the motor power supply current and power supply time parameters can be freely set in the system in advance.

[0004] The present invention provides the following technical solutions: The first object of the present invention is to provide: a multi-starter motor continuous starting control device, characterized in that it includes: a power supply unit, a motor unit, and a control unit. The power supply unit is formed by connecting a plurality of AC / DC power modules in parallel, and the motor unit is formed by connecting a plurality of starter motors in parallel. The input end of the power supply unit is connected to a 220V power supply, and each AC / DC power supply module converts AC220V into DC12V for output; the input end of the motor unit is connected to the output end of the power supply unit, and a 12V power supply is connected to the starter motor; the power supply end of the control unit is connected to a 220V power supply, and includes a main control unit for controlling the working state of each starter motor in the motor unit.

[0005] The power supply unit is set in the power supply cabinet, the motor unit is set in the motor cabinet, and the control unit is set in the control cabinet. The control cabinet, power cabinet, and motor cabinet are respectively provided with external connectors, which are convenient for installation and connection. The main control unit adopts a single-chip microcomputer. The control cabinet and power cabinet are plugged into the socket in the training laboratory and connected to the 220V power supply. It is plug-and-play, convenient and flexible, and does not require the use of batteries, which solves the troubles caused by the use of batteries before.

[0006] Connecting multiple AC / DC power modules in parallel can significantly increase output capacity and improve system reliability. When one AC / DC power module fails, other AC / DC power modules can continue to provide power, thus avoiding system downtime. Parallel AC / DC power modules can also dynamically distribute loads according to load conditions, achieve load balancing, and improve energy utilization and overall system efficiency.

[0007] The present invention can meet the requirements of multiple high-frequency starting in experimental training courses related to starter motors, and can meet the requirements of continuous experimental training for multiple classes and multiple groups of students.

[0008] Furthermore, a current sensor is connected in series to the power line of each starter motor, and the control unit also includes a multi-channel current sampling unit, the input end of the multi-channel current sampling unit is connected to each current sensor of the motor unit, and the output end of the multi-channel current sampling unit is connected to the main control unit.

[0009] The current data of each starter motor in the working state is obtained in real time through the current sensor, and is transmitted to the main control unit through the socket and the multi-channel current sampling unit.

[0010] Furthermore, a relay is connected in series to the control line of each starter motor, and the control unit further comprises a multi-way relay drive unit, the input end of the multi-way relay drive unit is connected to the main control unit, and the output end of the multi-way relay drive unit is connected to each relay of the motor unit. The coil of the relay is connected to the multi-way relay drive unit through a socket, and the main control unit sends an input signal to control the starter motor control line through the relay.

[0011] Each relay is normally open. When the relay is not powered, the contact is in the disconnected state, which is more secure. When the relay is powered, the contact is closed to form a circuit. The real-time current status of each motor is obtained through the current sensor. If there is overcurrent or undervoltage, the main control unit will promptly control the status of the corresponding relay to stop the corresponding starter motor. The relay can also be set according to the human-computer interaction unit to meet the requirements of multiple interval starts, the length of each start, and the interval time before and after in the experimental training course.

[0012] Furthermore, each starter motor is equipped with a branch fuse, one end of which is connected to a current sensor, and the other end of which is connected to two components, namely, the normally open contact input end of the relay and the power line of the starter motor, wherein the normally open contact output end of the relay is connected to the control line of the starter motor. A main fuse is connected in series between the output end of the power supply unit and the input end of the motor unit. The working current of the relevant starter motor is obtained in real time through the current sensor, and the start and stop of the starter motor is controlled in time through the relay. In addition, the cooperation of multiple fuses enhances the safety of the entire device.

[0013] Furthermore, the control unit also includes a PMBus communication unit, which is connected to the power supply unit. Since each AC / DC power supply module has its own single-chip microcomputer, the main control unit can obtain the current, voltage, temperature and fault status of each AC / DC power supply module through the PMBus communication unit, and output a current command to the corresponding AC / DC power supply module through the PMBus communication unit.

[0014] Furthermore, the control unit also includes a human-machine interaction unit and a Bluetooth / wifi communication unit. The human-machine interaction unit can display the current, voltage, temperature and fault conditions of each AC / DC power module, display the current and voltage data of each starter motor, and can also set the start time of the starter motor and the current parameters of the AC / DC power module. The Bluetooth / wifi communication unit can transmit the relevant start data of the starter motor to a mobile terminal (such as a mobile phone terminal).

[0015] A second object of the present invention is to provide a control method for a multi-starter motor continuous starting control device, which is characterized in that it comprises the following steps: (1) First, the main control unit detects whether each unit has any faults; If there is a fault, the system fault indicator light will be on and wait for 3 minutes to confirm whether the fault is eliminated; if there is no fault or the fault is eliminated, go to step (2); (2) Secondly, the main control unit sequentially detects whether there is a start command for the starter motor; (3) Again, the main control unit reads the current and time parameters set in the human-machine interaction unit and starts the target motor; (4) During the starting process of the target motor, the main control unit detects whether the target motor has overcurrent or undervoltage. If so, the starting of the target motor is stopped. If not, the process proceeds to step (5). (5) Then, the current and voltage parameters of the target motor are recorded and stored in the main control unit; (6) Finally, the Bluetooth / wifi communication unit of the main control unit is started to send the starting data of the starter motor to the mobile terminal.

[0016] The present invention comprises a power cabinet, a motor cabinet and a control cabinet; a plurality of parallel AC220V to DC12V power modules are arranged inside the power cabinet, each of which has a communication function (PMBus communication unit) and is connected to the control cabinet through a wiring harness via an internal socket of the cabinet; a plurality of parallel starter motors are arranged inside the motor cabinet, a relay is connected in series on the control line of each starter motor, a current sensor is connected in series on the power line, and the relay and the current sensor are connected to the control cabinet through a wiring harness via an internal socket of the cabinet; a multi-channel relay control unit, a multi-channel current sampling unit, a PMBus communication unit, a Bluetooth / wifi communication unit and a human-computer interaction unit are arranged inside the control cabinet, and the whole device is constituted together with the motor cabinet and the power cabinet, and can realize the functions of recording and storing the starting process parameters of multiple starter motors and setting the parameters such as the starting current and starting time of the starter motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a continuous starting control device for multiple starting motors of the present invention; Figure 2 It is a control flow chart of the continuous starting control device for multiple starting motors of the present invention; Figure 3 This is the multi-starter motor power supply parameter setting interface in Example 3; Figure 4 This is a graph showing the time variation of the current of the third starter motor in Example 3. DETAILED DESCRIPTION

[0018] Example 1 The invention discloses a multi-starter motor continuous starting control device, comprising: a power supply unit, a motor unit and a control unit. The power supply unit is arranged in a power cabinet, the motor unit is arranged in a motor cabinet, and the control unit is arranged in a control cabinet. The three cabinets are respectively connected through tap sockets and wiring harnesses.

[0019] 1. The power supply unit is composed of multiple AC / DC power modules connected in parallel. The input end of the power supply unit is plugged into the socket in the training laboratory and connected to a 220V power supply. Each AC / DC power supply module converts AC220V into DC12V for output.

[0020] 2. The motor unit is formed by connecting multiple starter motors in parallel. The input end of the motor unit is connected to the output end of the power unit, and the starter motor is connected to a 12V power supply. A current sensor is connected in series to the power line of each starter motor, and a relay is connected in series to the control line of each starter motor. The coil of the relay is connected to the multi-channel relay drive unit through the socket, and the normally open contact of the relay is connected to the starter motor control line. The main control unit sends an input signal to control the working state of the relay, and controls the starter motor control line through the relay.

[0021] Each starter motor is equipped with a branch fuse, one end of which is connected to the current sensor, and the other end of which is connected to two components, namely the normally open contact input end of the relay and the power line of the starter motor, where the normally open contact output end of the relay is connected to the control line of the starter motor. A main fuse is connected in series between the output end of the power unit and the input end of the motor unit.

[0022] 3. The power supply end of the control unit is plugged into the socket in the training laboratory and connected to a 220V power supply. The control unit includes a main control unit (using a single-chip microcomputer), a multi-channel current sampling unit, a multi-channel relay drive unit, a PMBus communication unit, a human-computer interaction unit, and a Bluetooth / wifi communication unit.

[0023] The input end of the multi-channel current sampling unit is connected to each current sensor of the motor unit, and the output end of the multi-channel current sampling unit is connected to the main control unit to obtain the current data of each starter motor in the working state. The input end of the multi-channel relay drive unit is connected to the main control unit, and the output end of the multi-channel relay drive unit is connected to each relay of the motor unit to timely control the start and stop state of the starter motor.

[0024] The PMBus communication unit is connected to the power supply unit. Since each AC / DC power supply module has its own single-chip microcomputer, the main control unit can obtain the current, voltage, temperature and fault status of each AC / DC power supply module through the PMBus communication unit, and output current commands to the corresponding AC / DC power supply module through the PMBus communication unit.

[0025] The human-machine interaction unit can display the current, voltage, temperature and fault conditions of each AC / DC power module, display the current and voltage data of each starter motor, and set the start time of the starter motor and the current parameters of the AC / DC power module. The Bluetooth / wifi communication unit can transmit the relevant start data of the starter motor to the mobile terminal (such as the mobile phone).

[0026] Example 2 A control method for a continuous starting control device for multiple starting motors, such as Figure 2 As shown, the following steps are included: (1) First, the main control unit detects whether each unit has any faults; If there is a fault, the system fault indicator light will be on and wait for 3 minutes to confirm whether the fault is eliminated; if there is no fault or the fault is eliminated, go to step (2); (2) Secondly, the main control unit sequentially detects whether there is a start command for the starter motor; (3) Again, the main control unit reads the current and time parameters set in the human-machine interaction unit and starts the target motor; (4) During the starting process of the target motor, the main control unit detects whether the target motor has overcurrent or undervoltage. If so, the starting of the target motor is stopped. If not, the process proceeds to step (5). (5) Then, the current and voltage parameters of the target motor are recorded and stored in the main control unit; (6) Finally, the Bluetooth / wifi communication unit of the main control unit is started to send the starting data of the starter motor to the mobile terminal.

[0027] Example 3 On the basis of Example 1 or 2, a relevant training experiment is carried out - the application experiment of the starting current of the starting motor in the engine air tightness detection. The relevant experimental requirements are as follows: Figure 3 As shown, set the interface of the human-machine interaction unit to the multi-starter motor power supply parameter setting interface, and then set the relevant parameters: (1) In the target motor setting text box, enter: Set the control parameters of motor No. 3; (2) In the current and time parameter setting text box, enter: Time 1: 0s-2.5s, current 1: 200A; Time 2: 2.5s-7.5s, current 2: 0A; Time 3: 7.5s-15s, current 3: 190A; Time 4: 15s-25s, current 4: 0A; That is, the No. 3 starter motor is selected for the relevant experiment, and the starter motor is required to start twice in succession. The first start time is 2.5s, the current of the AC / DC power module is 200A, the second start time is 7.5s, the current of the AC / DC power module is 190A, the interval between the two starts is 5s, and the second start is stopped for 10s. During this period, the current time variation curve of the No. 3 starter motor is as follows Figure 4 shown.

[0028] Before the second start, the first sealing ring of the first cylinder of the engine was removed, and the current change curve during the starting process was recorded. The number of engine sealing rings was then adjusted autonomously to explore the changing pattern of starting current under conditions such as slight leakage and severe leakage in a single cylinder and multiple cylinders respectively. The corresponding mathematical model was established and quantitative analysis was performed to provide a theoretical basis for cylinder air tightness failure analysis from the dimension of starting motor working current.

Claims

1. A multi-starter motor continuous starting control device, characterized in that: include: The power supply unit is composed of multiple AC / DC power supply modules connected in parallel; the input end of the power supply unit is connected to a 220V power supply, and each AC / DC power supply module converts AC220V into DC12V for output; The motor unit is formed by connecting multiple starter motors in parallel; the input end of the motor unit is connected to the output end of the power supply unit, and the starter motor is connected to a 12V power supply; The control unit, whose power supply end is connected to a 220V power supply, includes a main control unit for controlling the working state of each starter motor in the motor unit.

2. The multiple starting motor continuous starting control device according to claim 1 is characterized in that: A relay is connected in series on the control line of each starter motor.

3. The multiple starting motor continuous starting control device according to claim 2 is characterized in that: A current sensor is connected in series with the power line of each starter motor.

4. The multiple starting motor continuous starting control device according to claim 3 is characterized in that: Each starting motor is equipped with a branch circuit fuse.

5. The multiple starting motor continuous starting control device according to claim 4 is characterized in that: A main fuse is connected in series between the output end of the power supply unit and the input end of the motor unit.

6. The multiple starting motor continuous starting control device according to claim 5 is characterized in that: The control unit further comprises a multi-channel current sampling unit, the input end of the multi-channel current sampling unit is connected to each current sensor of the motor unit, and the output end of the multi-channel current sampling unit is connected to the main control unit.

7. The multiple starting motor continuous starting control device according to claim 6 is characterized in that: The control unit also includes a multi-way relay driving unit, the input end of the multi-way relay driving unit is connected to the main control unit, and the output end of the multi-way relay driving unit is connected to each relay of the motor unit.

8. The multiple starting motor continuous starting control device according to claim 7 is characterized in that: The control unit also includes a human-computer interaction unit and a Bluetooth / wifi communication unit.

9. The multiple starting motor continuous starting control device according to claim 8 is characterized in that: The control unit also includes a PMBus communication unit, and the PMBus communication unit is connected to the power supply unit.

10. The control method of the multi-starter motor continuous starting control device according to claim 1, characterized in that: The following steps are involved: (1) First, the main control unit detects whether each unit has any faults; If there is a fault, the system fault indicator light will be on and wait for 3 minutes to confirm whether the fault is eliminated; if there is no fault or the fault is eliminated, go to step (2); (2) Secondly, the main control unit sequentially detects whether there is a start command for the starter motor; (3) Again, the main control unit reads the current and time parameters set in the human-machine interaction unit and starts the target motor; (4) During the starting process of the target motor, the main control unit detects whether the target motor has overcurrent or undervoltage. If so, the starting of the target motor is stopped. If not, the process proceeds to step (5). (5) Then, the current and voltage parameters of the target motor are recorded and stored in the main control unit; (6) Finally, the Bluetooth / wifi communication unit of the main control unit is started to send the starting data of the starter motor to the mobile terminal.

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