Dual-motor control structure of high-pressure cleaning vehicle

Abstract

The invention provides a dual-motor control structure of a high-pressure cleaning vehicle. The dual-motor control structure comprises a chassis high-voltage power supply, a motor controller connected with the chassis high-voltage power supply, a high-voltage distribution box, a signal relay box, an upper controller, a first motor and a second motor, wherein the high-voltage distribution box, the signal relay box and the upper controller are connected with the motor controller; the first motor and the second motor are both connected with the high-voltage distribution box and the signal relay box, and the top-mounted controller is further connected with the high-voltage distribution box and the signal relay box. By means of the mode, the two motors are controlled through one motor controller, switching work of the two motors can be achieved through one key, the switching time is shortened, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of motor control, and in particular relates to a dual-motor control structure of a high-pressure cleaning vehicle. Background Art

[0002] At present, pure electric high-pressure cleaning vehicles have two water outputs, high-pressure water and low-pressure water, and two motors with different performances are needed to power the water pumps. To this end, two motor controllers are needed to provide power to the two motors to control the normal operation of the two motors. In the work process of the high-pressure cleaning vehicle, the two working water pumps will not work at the same time, resulting in only one of the two motors working at the same time, and ultimately resulting in one of the two motor controllers being idle at the same time, resulting in a waste of motor controller resources.

[0003] In recent years, with the rapid development of the economy, customers have higher and higher requirements for the economic efficiency of products. When a pure electric high-pressure cleaning vehicle is working, only one motor needs to be controlled and driven, and the whole vehicle does not need two motor controllers at the same time. In the prior art, two motor controllers need to be arranged, and high-voltage power is obtained from the chassis high-voltage battery at the same time. The chassis needs to provide two power supply interfaces, which increases a lot of layout and component costs. However, the two motor controllers do not work at the same time, and one motor controller must be idle at the same time, resulting in idle costs for the motor controllers. The two motor controllers collect the signals of the corresponding motors through the low-voltage wiring harness respectively, and perform logical operations respectively. The two motor controllers independently provide the three-phase AC input source of the corresponding motors through the high-voltage wiring harness to control the operation of the motors. That is, the two motor controllers need to be arranged separately, occupying a lot of space in the car. When the two working waterways are switched, the motor controller in the current working state needs to be shut down first, the response time is long, and the operation logic is more complicated. Summary of the invention

[0004] The present invention provides a dual-motor control structure for a high-pressure cleaning vehicle, which solves the problem that the existing dual-motor control requires two motor controllers to control corresponding motors respectively, and the two motor controllers do not work at the same time, resulting in waste of resources, high cost and long response time.

[0005] Based on the above purpose, the present invention proposes a dual-motor control structure of a high-pressure cleaning vehicle, comprising: a chassis high-voltage power supply, a motor controller connected to the chassis high-voltage power supply, a high-voltage distribution box connected to the motor controller, a signal relay box and a body controller, and a first motor and a second motor; the first motor and the second motor are both connected to the high-voltage distribution box and the signal relay box, and the body controller is also connected to the high-voltage distribution box and the signal relay box; the signal relay box receives a first control signal transmitted by the body controller, and transmits the collected sensor signal of the first motor or the second motor to the motor controller; the motor controller receives and processes the sensor signal and forwards it to the body controller, and receives a second control signal transmitted by the body controller; the motor controller receives the high-voltage direct current output by the chassis high-voltage power supply for AC / DC conversion, and outputs three-phase high-voltage alternating current to the high-voltage distribution box according to the sensor signal; the high-voltage distribution box transmits the three-phase high-voltage alternating current to the first motor or the second motor according to a third control signal transmitted by the body controller.

[0006] Optionally, the dual-motor control structure further includes a high-voltage interface connected between the chassis high-voltage power supply and the motor controller.

[0007] Optionally, the dual-motor control structure also includes a chassis low-voltage power supply, and the high-voltage distribution box includes: a first relay, a second relay, a first contactor and a second contactor; the first relay is connected between the upper body controller and the first contactor, the second relay is connected between the upper body controller and the second contactor, the first relay and the second relay are also connected to the chassis low-voltage power supply, the first contactor is connected between the motor controller and the first motor, the second contactor is connected between the motor controller and the second motor, and the first contactor and the second contactor are also connected to the chassis low-voltage power supply.

[0008] Optionally, the upper-mounted controller also receives a feedback signal from the high-voltage distribution box, and outputs the second control signal to the motor controller according to the feedback signal to control the operation of the first motor or the second motor.

[0009] Optionally, the first relay includes: a first control end and a first control switch, the first control end is connected to the upper body controller, one end of the first control switch is connected to the chassis low-voltage power supply, and the other end is connected to the first contactor.

[0010] Optionally, the first contactor includes: a third control end, a first switch and a second switch; the third control end is connected to the first control switch, the first switch is connected to the chassis low-voltage power supply and the upper body controller, and the second switch is connected to the motor controller and the first motor.

[0011] Optionally, the second relay includes: a second control end and a second control switch, the second control end is connected to the upper body controller, one end of the second control switch is connected to the chassis low-voltage power supply, and the other end is connected to the second contactor.

[0012] Optionally, the second contactor includes: a fourth control end, a third switch and a fourth switch; the fourth control end is connected to the second control switch, the third switch is connected to the chassis low-voltage power supply and the upper body controller, and the fourth switch is connected to the motor controller and the second motor.

[0013] Optionally, the signal relay box includes: multiple relays, the control end of any one of the relays is connected to the upper controller, the normally closed contact of the relay is connected to the first motor and the motor controller, and the normally open contact of the relay is connected to the second motor and the motor controller.

[0014] Optionally, if the upper-mounted controller controls the normally closed contacts of multiple relays to close, the motor controller collects the sensor signal of the first motor; if the upper-mounted controller controls the normally open contacts of multiple relays to close, the motor controller collects the sensor signal of the second motor.

[0015] From the above, it can be seen that the beneficial effects of the technical solution provided by the present invention are: the dual-motor control structure of a high-pressure cleaning vehicle provided by the present invention comprises: a chassis high-voltage power supply, a motor controller connected to the chassis high-voltage power supply, a high-voltage distribution box connected to the motor controller, a signal relay box and a top-mounted controller, and a first motor and a second motor; the first motor and the second motor are both connected to the high-voltage distribution box and the signal relay box, and the top-mounted controller is also connected to the high-voltage distribution box and the signal relay box; the signal relay box receives the first control signal transmitted by the top-mounted controller, and collects the sensor signal of the first motor or the second motor The sensor signal is transmitted to the motor controller; the motor controller receives and processes the sensor signal and forwards it to the upper body controller, and receives a second control signal transmitted by the upper body controller; the motor controller also receives the high-voltage direct current output by the chassis high-voltage power supply for AC / DC conversion, and outputs three-phase high-voltage alternating current to the high-voltage distribution box according to the sensor signal; the high-voltage distribution box transmits the three-phase high-voltage alternating current to the first motor or the second motor according to the third control signal transmitted by the upper body controller, and can control two motors through one motor controller, and can realize dual-motor switching with one button, thereby shortening the switching time and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a dual-motor control structure of a high-pressure cleaning vehicle according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the principle of a high-voltage distribution box according to an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of packaging of a high-voltage distribution box according to an embodiment of the present invention;

[0020] Figure 4 The figure is a schematic diagram of the principle of a signal relay box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0022] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] The embodiment of the present invention implements a dual-motor control structure of a high-pressure cleaning vehicle, such as Figure 1 As shown, the dual-motor control structure of the high-pressure cleaning vehicle includes: a chassis high-voltage power supply 11, a motor controller 12 connected to the chassis high-voltage power supply 11, a high-voltage distribution box 13 connected to the motor controller 12, a signal relay box 14 and a body controller 15, and a first motor 16 and a second motor 17; the first motor 16 and the second motor 17 are both connected to the high-voltage distribution box 13 and the signal relay box 14, and the body controller 15 is also connected to the high-voltage distribution box 13 and the signal relay box 14.

[0024] The signal relay box 14 receives the first control signal transmitted by the upper body controller 15, and transmits the collected sensor signal of the first motor 16 or the second motor 17 to the motor controller 12; the motor controller 12 receives and processes the sensor signal and forwards it to the upper body controller 15, and receives the second control signal transmitted by the upper body controller 15; the motor controller 12 also receives the high-voltage direct current output by the chassis high-voltage power supply 11 for AC / DC conversion, and outputs three-phase high-voltage alternating current to the high-voltage distribution box 13 according to the sensor signal; the high-voltage distribution box 13 transmits the three-phase high-voltage alternating current to the first motor 16 or the second motor 17 according to the third control signal transmitted by the upper body controller 15.

[0025] In the embodiment of the present invention, see Figure 1The dual-motor control structure also includes a high-voltage interface 18, which is connected between the chassis high-voltage power supply 11 and the motor controller 12. The chassis high-voltage power supply 11 outputs high-voltage direct current to the motor controller 12 through the high-voltage interface 18. The upper body controller 15 also receives the feedback signal of the high-voltage distribution box 13, and outputs the second control signal to the motor controller 12 according to the feedback signal to control the operation of the first motor 16 or the second motor 17. The feedback signal includes a first feedback signal and a second feedback signal. The upper body controller 15 outputs the second control signal to the motor controller 12 according to the first feedback signal to control the operation of the first motor 16, and outputs the second control signal to the motor controller 12 according to the second feedback signal to control the operation of the second motor 17.

[0026] In the embodiment of the present invention, Figure 2-3 As shown, the dual-motor control structure also includes a chassis low-voltage power supply, which provides a low-voltage direct current of +24V. The high-voltage distribution box 13 includes: a first relay S1, a second relay S2, a first contactor S3, and a second contactor S4, which are arranged in a metal shell. Of course, in other embodiments of the present invention, the high-voltage distribution box 13 can also use other shell materials, which is not limited here. The first relay S1, the second relay S2, the first contactor S3, and the second contactor S4 are arranged inside, and are all controlled by 24V voltage.

[0027] like Figure 2 As shown, the first relay S1 is connected between the body controller 15 and the first contactor S3, the second relay S2 is connected between the body controller 15 and the second contactor S4, the first relay S1 and the second relay S2 are also connected to the chassis low-voltage power supply, the first contactor S3 is connected between the motor controller 12 and the first motor 16, the second contactor S4 is connected between the motor controller 12 and the second motor 17, and the first contactor S3 and the second contactor S4 are also connected to the chassis low-voltage power supply.

[0028] See also Figure 3, the high-voltage AC power input is connected to the motor controller 12 to input three-phase high-voltage AC power. The output of the first contactor S3 is connected to the first motor 16 to drive the first motor 16 to work. The output of the second contactor S4 is connected to the second motor 17 to drive the second motor 17 to work. The first relay S1 and the second relay S2 are low-voltage DC relays, the contact spring power input end is connected by a wire, and finally connected to the chassis low-voltage power supply through a wire, and the control input end is respectively connected to different signal output ports of the upper-mounted controller 15 through a wire. The first contactor S3 and the second contactor S4 are three-phase high-voltage AC contactors, and the control signal input end is respectively connected to the corresponding spring contact output end of the first relay S1 and the second relay S2 through a wire. The first contactor S3 and the second contactor S4 have feedback signal contacts inside, and the power input of the feedback signal contacts is connected through a wire, and finally connected to the chassis low-voltage power supply through a wire; the signal output of the feedback signal contacts is respectively connected to the corresponding signal input points of the upper-mounted controller 15 through a wire.

[0029] See Figure 2 , the first relay S1 includes: a first control terminal 131 and a first control switch 132, the first control terminal is connected to the upper body controller 15, one end of the first control switch 132 is connected to the chassis low-voltage power supply, and the other end is connected to the first contactor S3. The first contactor S3 includes: a third control terminal 136, a first switch KB1 and a second switch KA1; the third controller 136 is connected to the first control switch 132, the first switch KB1 is connected to the chassis low-voltage power supply and the upper body controller 15, and the second switch KA1 is connected to the motor controller 12 and the first motor 16. The second switch KA1 is a three-wire switch, which transmits the three-phase high voltage UVW output by the motor controller 12 to the first motor 16 when closed to drive the first motor 16 to work.

[0030] If it is necessary to control the first motor 16 to work, the upper body controller 15 controls the first relay S1 to close, so that the third control terminal 136 of the first contactor S3 is connected to the chassis low-voltage power supply, and then controls the second switch KA1 to close, and the motor controller 12 outputs three-phase high-voltage AC power to the first motor 16 to make the first motor 16 work.

[0031] The second relay S2 includes: a second control terminal 133 and a second control switch 134, the second control terminal 133 is connected to the upper body controller 15, one end of the second control switch 134 is connected to the chassis low-voltage power supply, and the other end is connected to the second contactor S4. The second contactor S4 includes: a fourth control terminal 137, a third switch KB2 and a fourth switch KA2; the fourth control terminal 137 is connected to the second control switch 134, the third switch KB2 is connected to the chassis low-voltage power supply and the upper body controller 15, and the fourth switch KA2 is connected to the motor controller 12 and the second motor 17. The fourth switch KA2 is a three-wire switch, which transmits the three-phase high voltage UVW output by the motor controller 12 to the second motor 17 when closed to drive the second motor 17 to work.

[0032] If it is necessary to control the second motor 17 to work, the upper body controller 15 controls the second relay S2 to close, so that the fourth control terminal 137 of the second contactor S4 is connected to the chassis low-voltage power supply, and then controls the fourth switch KA2 to close, and the motor controller 12 outputs three-phase high-voltage AC power to the second motor 17 to make the second motor 17 work.

[0033] In the embodiment of the present invention, the specific working process of the high voltage distribution box 13 is as follows:

[0034] (1) Before the first motor 16 starts to work, the upper controller 15 sends a third control signal to the high-voltage distribution box 13. The first relay S1 in the high-voltage distribution box 13 receives the third control signal, and the electromagnetic coil of the first relay S1 is energized. The third control signal is used to indicate a closing signal of the first relay S1 in the high-voltage distribution box 13.

[0035] (2) The electromagnetic coil of the first relay S1 generates a magnetic field to drive the spring contact of the first relay S1 to move, so that the two ends of the spring contact of the first relay S1 are connected, that is, the first control switch 132 is controlled to be closed, and the current of the chassis low-voltage power supply passes through the spring contact of the first relay S1 to reach the control signal input end of the first contactor S3, that is, the third control end 136 of the first contactor S3.

[0036] (3) When the control signal input terminal of the first contactor S3 is energized, the electromagnetic coil is energized, driving the spring contact of the first contactor S3 to move, so that the two ends of the three-way three-phase high-voltage contacts of the first contactor S3 are connected, that is, the second switch KA1 of the first contactor S3 is controlled to be closed.

[0037] (4) When the spring contact of the first contactor S3 moves and contacts, it drives the two ends of the signal feedback contact of the first contactor S3 to contact, that is, the first switch KB1 of the first contactor S3 is closed. At this time, the low-voltage direct current from the chassis low-voltage power supply passes through the two ends of the signal feedback contact and is connected to the signal feedback input point corresponding to the upper body controller 15, thereby transmitting the first feedback signal of the first contactor S3 to the upper body controller 15.

[0038] (5) The upper body controller 15 receives the first feedback signal of the first contactor S3, determines that the three-way three-phase high-voltage contacts of the first contactor S3 are turned on, that is, the second switch KA1 of the first contactor S3 is closed, and detects that the three-way three-phase high-voltage contacts of the second contactor S4 are not turned on, that is, the second switch KA2 of the second contactor S4 is in the disconnected state. The three-phase high-voltage circuit from the motor controller 12 to the first motor 16 is normally connected, and the three-phase high-voltage circuit from the motor controller 12 to the second motor 17 is normally disconnected. The upper body controller 15 sends a second control signal to the motor controller 12, and the second control signal is used to instruct the first motor 16 to start, and the motor controller 12 outputs three-phase high-voltage AC power to the first motor 16. The three-phase high-voltage AC power is 380V AC power.

[0039] (6) At this time, the three-way three-phase high-voltage AC power from the motor controller 12 is output to the first motor 16 through the two ends of the spring contact of the first contactor S3. At this point, the first motor 16 is powered and starts to work.

[0040] (7) Before the first motor 16 stops working, the upper controller 15 sends a stop command to the motor controller 12 , and the motor controller 12 stops outputting three-phase high-voltage AC power to the first motor 16 .

[0041] (8) When the motor controller 12 detects that the first motor 16 has stopped rotating, it sends a signal indicating that the first motor 16 has stopped rotating to the upper controller 15 .

[0042] (9) The body controller 15 stops sending the third control signal to the first relay S1, the electromagnetic coil of the first relay S1 is de-energized, and the electromagnetic field is turned off.

[0043] (10) The spring contact of the first relay S1 is reset due to the disappearance of the electromagnetic field and the spring force. The two ends of the spring contact of the first relay S1 are disconnected, causing the third control terminal 136 of the first contactor S3 to be powered off and the electromagnetic field to disappear.

[0044] (11) The third control terminal 136 of the first contactor S3 is powered off, and the first switch KB1 and the second switch KA1 of the first contactor S3 are reset due to the elastic force, resulting in the disconnection of both ends of the second switch KA1 and the disconnection of both ends of the first switch KB1 of the first contactor S3.

[0045] (12) Both ends of the first switch KB1 of the first contactor S3 are disconnected, and the upper body controller 15 receives the three-phase high-voltage AC contact disconnection signal of the first contactor S3, and the first motor 16 is shut down to complete the operation.

[0046] The starting and stopping operations of the second motor 17 are the same as those of the first motor 16 and will not be described in detail here.

[0047] In the embodiment of the present invention, the signal relay box 14 includes: a plurality of relays, the control end of any of the relays is connected to the upper controller 15, the normally closed contact of the relay is connected to the first motor and the motor controller, and the normally open contact of the relay is connected to the second motor and the motor controller. The relay is a low-voltage DC solid-state relay.

[0048] like Figure 4 As shown, the main body of the signal relay box 14 is a PCB board structure, and 10 relays are welded on the PCB board, among which 8 relays K1, K2, ..., K8 are connected to the first motor 16 and the second motor 17, and relays K9 and K10 are reserved relays. The power supply of the signal relay box 14 is connected to the chassis low-voltage power supply through a wire, and the control end of each relay is used as a control signal input point, which is connected to the control output point of the upper controller through a wire. The control signal source of the solid-state relay is connected to the control signal input point of the signal relay box 14 through the PCB board, and finally receives the first control signal output by the upper controller 15. One end of the normally closed contact and the normally open contact of the relay serves as the input of the controlled circuit of the solid-state relay, and is connected to the signal collection point of the motor controller 12 through the PCB board and wires; the other end of the normally closed contact of the relay serves as the normally closed contact of the controlled circuit of the solid-state relay, and is connected to the sensor signal collection output of the first motor 16 through the PCB board and wires; the other end of the normally open contact of the relay serves as the normally open contact of the controlled circuit of the solid-state relay, and is connected to the sensor signal collection output of the second motor 17 through the PCB board and wires.

[0049] If the upper body controller 15 controls the normally closed contacts of the multiple relays to close, the motor controller 12 collects the sensor signal of the first motor 16; if the upper body controller 15 controls the normally open contacts of the multiple relays to close, the motor controller 12 collects the sensor signal of the second motor 17.

[0050] In the embodiment of the present invention, the specific working principle of the signal relay box 14 is as follows:

[0051] (1) When no motor needs to work or the first motor 16 needs to work, the upper controller 15 does not send the low-voltage relay box switching signal to the signal relay box 14, the control signal input point of the relay is not energized, relays K1 to K8 do not receive the first control signal, the normally closed contacts of each relay are closed, both ends of the normally closed contacts are closed, the sensor signal output point of the first motor 16 is connected to the signal collection point of the motor controller 12, and the motor controller 12 normally collects the sensor signal of the first motor 16.

[0052] (2) Before the second motor 17 starts to work, the upper body controller 15 sends a first control signal to the signal relay box 14, and the control terminals of the relays K1 to K8 are energized. The first control signal is used to instruct the switching of the motor.

[0053] (3) The control ends of relays K1 to K8 are energized, and the control signal input points of relays K1 to K8 are energized. According to the switching characteristics of the electronic components, the normally open contacts of relays K1 to K8 are closed, so that both ends of the normally open contacts of each relay are conductive.

[0054] (4) Both ends of the normally open contacts of relays K1 to K8 are conducting, so that the sensor signal output end of the second motor 17 is connected to the signal end of the motor controller 12, the signal acquisition circuit is conducting, and the motor controller 12 normally acquires the sensor signal of the second motor 17.

[0055] (5) When the second motor 17 stops, the upper controller 15 sends a stop signal of the second motor 17 to the motor controller 12, and the motor controller 12 stops the three-phase high-voltage AC power output of the second motor.

[0056] (6) When the motor controller 12 detects that the motor has stopped rotating, it feeds back to the upper controller 15, and the upper controller 15 stops sending the first control signal.

[0057] (7) The signal relay box 14 receives the first control signal. According to the switching characteristics of the electronic components, the normally open contacts of relays K1 to K8 are opened, so that both ends of the normally open contacts of each relay are disconnected; the normally closed contacts are closed, so that both ends of the normally closed contacts of each relay are connected.

[0058] (8) The signal relay box 14 returns to the initial state. In this state, the signal collection point of the motor controller 12 is connected to the sensor signal output point of the first motor 16 and is disconnected from the sensor signal output point of the second motor 17.

[0059] The signal relay box 14 in the embodiment of the present invention may not adopt the PCB board-mounted soldered solid-state relay solution, but instead adopt 8 or more ordinary electromagnetic relays and use an external wire connection control solution.

[0060] If the relays and contactors in the embodiment of the present invention are replaced by relays and contactors of other specifications, the chassis low-voltage power supply and three-phase alternating current can also be changed to other voltage specifications.

[0061] The dual motor control structure of the high-pressure cleaning vehicle of the embodiment of the present invention can switch the internal program of the motor controller with one key, without switching the chassis high-voltage power supply interface and the motor controller. The upper-mounted controller controls the switching of the high-voltage distribution box and the signal relay box. The motor controller only needs one output to control two motors, and the switching time is shorter. The high-voltage distribution box can realize the switching of the three-phase AC power supply of the motor, and control the mutual exclusion of the two three-phase circuits, avoiding the working condition of the dual motors working at the same time. The high-voltage distribution box can feedback the opening and closing state of the internal first contactor and the second contactor to the upper-mounted controller, and the upper-mounted controller determines whether the high-voltage distribution box has been switched normally, thereby controlling the motor controller to output high voltage, thereby protecting the entire dual-motor control structure. The signal relay box can realize the switching of the motor controller to collect motor signals, and control the mutual exclusion of the two motor signal collection circuits, avoiding the working condition of the dual motors working at the same time. In the embodiment of the present invention, the high-voltage distribution box, the signal relay box and the internal components of the motor controller can be integrated as a whole, arranged inside a whole, and the internal signals and current exchanges of the three components are integrated into a whole. The copper bus, wires and PCB boards are used to connect the three components, and the three components are designed as a whole.

[0062] The dual-motor control structure of the high-pressure cleaning vehicle in the embodiment of the present invention eliminates one motor controller, avoids idleness, reduces the cost of the motor controller, and the chassis high-voltage power supply only needs to provide one high-voltage interface, saving the cost of power distribution and connectors. Correspondingly, when the dual-motor control structure sets a cooling system, only one cooling water path needs to be provided, reducing the complexity of the pipeline and saving the cooling cost.

[0063] In summary, the dual-motor control structure of the high-pressure cleaning vehicle of the embodiment of the present invention includes: a chassis high-voltage power supply, a motor controller connected to the chassis high-voltage power supply, a high-voltage distribution box connected to the motor controller, a signal relay box and a body controller, and a first motor and a second motor; the first motor and the second motor are both connected to the high-voltage distribution box and the signal relay box, and the body controller is also connected to the high-voltage distribution box and the signal relay box; the signal relay box receives the first control signal transmitted by the body controller, and transmits the collected sensor signal of the first motor or the second motor to the motor controller device; the motor controller receives and processes the sensor signal and forwards it to the upper body controller, and receives a second control signal transmitted by the upper body controller; the motor controller also receives the high-voltage direct current output by the chassis high-voltage power supply for AC / DC conversion, and outputs three-phase high-voltage alternating current to the high-voltage distribution box according to the sensor signal; the high-voltage distribution box transmits the three-phase high-voltage alternating current to the first motor or the second motor according to the third control signal transmitted by the upper body controller, and can control two motors through one motor controller, and can realize dual-motor switching with one button, which shortens the switching time and reduces the cost.

[0064] The above specific embodiments of the present invention are described. In some cases, the actions or steps recorded in the embodiments of the present invention can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0066] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection of this disclosure.

Claims

1. A dual-motor control structure for a high-pressure cleaning vehicle, characterized in that: The dual-motor control structure includes: a chassis high-voltage power supply, a motor controller connected to the chassis high-voltage power supply, a high-voltage distribution box connected to the motor controller, a signal relay box and a body controller, and a first motor and a second motor; the first motor and the second motor are both connected to the high-voltage distribution box and the signal relay box, and the body controller is also connected to the high-voltage distribution box and the signal relay box; The signal relay box receives a first control signal transmitted by the upper body controller, and transmits the collected sensor signal of the first motor or the second motor to the motor controller; the motor controller receives and processes the sensor signal and forwards it to the upper body controller, and receives a second control signal transmitted by the upper body controller; the motor controller also receives the high-voltage direct current output by the chassis high-voltage power supply for AC / DC conversion, and outputs three-phase high-voltage alternating current to the high-voltage distribution box according to the sensor signal; the high-voltage distribution box transmits the three-phase high-voltage alternating current to the first motor or the second motor according to the third control signal transmitted by the upper body controller.

2. The dual motor control structure according to claim 1, characterized in that: The dual-motor control structure also includes a high-voltage interface connected between the chassis high-voltage power supply and the motor controller.

3. The dual motor control structure according to claim 1, characterized in that: The dual-motor control structure also includes a chassis low-voltage power supply, and the high-voltage distribution box includes: a first relay, a second relay, a first contactor and a second contactor; the first relay is connected between the upper body controller and the first contactor, the second relay is connected between the upper body controller and the second contactor, the first relay and the second relay are also connected to the chassis low-voltage power supply, the first contactor is connected between the motor controller and the first motor, the second contactor is connected between the motor controller and the second motor, and the first contactor and the second contactor are also connected to the chassis low-voltage power supply.

4. The dual motor control structure as claimed in claim 3, characterized in that: The upper body controller also receives a feedback signal from the high voltage distribution box, and outputs the second control signal to the motor controller according to the feedback signal to control the operation of the first motor or the second motor.

5. The dual motor control structure as claimed in claim 3, characterized in that: The first relay includes: a first control end and a first control switch, the first control end is connected to the upper body controller, one end of the first control switch is connected to the chassis low-voltage power supply, and the other end is connected to the first contactor.

6. The dual motor control structure as claimed in claim 5, characterized in that: The first contactor includes: a third control end, a first switch and a second switch; the third control end is connected to the first control switch, the first switch is connected to the chassis low-voltage power supply and the upper body controller, and the second switch is connected to the motor controller and the first motor.

7. The dual motor control structure as claimed in claim 3, characterized in that: The second relay includes: a second control end and a second control switch, the second control end is connected to the upper body controller, one end of the second control switch is connected to the chassis low-voltage power supply, and the other end is connected to the second contactor.

8. The dual motor control structure as claimed in claim 7, characterized in that: The second contactor includes: a fourth control end, a third switch and a fourth switch; the fourth control end is connected to the second control switch, the third switch is connected to the chassis low-voltage power supply and the upper body controller, and the fourth switch is connected to the motor controller and the second motor.

9. The dual motor control structure according to claim 1, characterized in that: The signal relay box includes: a plurality of relays, a control end of any of the relays is connected to the upper controller, a normally closed contact of the relay is connected to the first motor and the motor controller, and a normally open contact of the relay is connected to the second motor and the motor controller.

10. The dual motor control structure according to claim 9, characterized in that: If the upper-mounted controller controls the normally closed contacts of the plurality of relays to close, the motor controller collects the sensor signal of the first motor; if the upper-mounted controller controls the normally open contacts of the plurality of relays to close, the motor controller collects the sensor signal of the second motor.

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