CN219659604U - Electrical system and fire engine - Google Patents
Electrical system and fire engine Download PDFInfo
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- CN219659604U CN219659604U CN202321136035.9U CN202321136035U CN219659604U CN 219659604 U CN219659604 U CN 219659604U CN 202321136035 U CN202321136035 U CN 202321136035U CN 219659604 U CN219659604 U CN 219659604U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 82
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 239000004606 Fillers/Extenders Substances 0.000 claims description 29
- 238000010257 thawing Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
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- 230000010354 integration Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
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- 230000001133 acceleration Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
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Abstract
The utility model discloses an electrical system and a fire engine, wherein the electrical system comprises: at least two motors for driving a load in the fire engine; the power supply access end of the integrated controller is used for being connected with a power battery, the integrated controller is provided with at least two motor access ends, each motor access end is used for being connected with one motor, and the integrated controller is used for controlling the connected motor to work so as to drive a load in the fire engine. The utility model can solve the problems of discrete distribution and low integration level of controllers of all main electric drives of the new energy fire truck.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to an electrical system and a fire engine.
Background
The global environment is becoming worse, global warming, species acceleration and extinction, climate change, sea level rise caused by polar glacier melting and the like are becoming effective measures for promoting energy conservation and emission reduction and solving environmental pollution. As a branch of the automobile, new energy and intellectualization are also necessary trends, the fire engine on the market is also traditional fuel power, mechanical energy is transmitted to a water supply pump through an engine power takeoff, the engine of the vehicle has severe working conditions, the oil consumption and the emission pollution are serious, and the development of the fire engine with mixed power is an effective solving way. However, the existing new energy fire engine is generally connected with electrical equipment such as a range extender and an inverter by adopting a distribution box or a distribution cabinet, and the distribution scheme is characterized in that a distribution box is connected between the range extender and a battery as well as between the range extender and a motor, so that circuit harnesses are long, controllers of all main electric drives are discretely distributed, and poor integration is caused, such as driving motor controllers and generator controllers, so that the problems of scattered architecture, distributed arrangement, chaotic harness, complex structure, high cost, low integration and the like are caused.
Disclosure of Invention
The utility model mainly aims to provide an electrical system, which aims to solve the problems of discrete distribution and low integration level of controllers of main electric drives of a new energy fire truck.
To achieve the above object, the present utility model provides an electrical system comprising:
at least two motors for driving a load in the fire engine;
the power supply access end of the integrated controller is used for being connected with a power battery, the integrated controller is provided with at least two motor access ends, each motor access end is used for being connected with one motor, and the integrated controller is used for controlling the connected motor to work so as to drive a load in the fire engine.
Optionally, the electrical system further comprises:
a water pump;
the input end of the water pump inverter is connected with the water pump access end of the integrated controller, and the water pump inverter is used for converting an accessed direct-current power supply into an alternating-current power supply and then outputting the alternating-current power supply;
the input end of the frequency converter is connected with the output end of the water pump inverter, the output end of the frequency converter is connected with the power supply end of the water pump, and the frequency converter is used for carrying out frequency conversion treatment on an accessed alternating current power supply and then outputting the processed alternating current power supply to the water pump so as to supply power for the water pump.
Optionally, the integrated controller includes:
a central control unit;
the water pump switch circuit, the input of water pump switch circuit with the power access end is connected, the output of water pump switch circuit with the water pump access end is connected, the controlled end of water pump switch circuit with central control unit is connected, water pump switch circuit is used for when receiving the fire control signal of central control unit output, control the power access end with the water pump access end electricity is connected, so that the water pump dc-to-ac converter begins work.
Optionally, the integrated controller includes:
a central control unit;
the motor driving units are arranged between the power supply access end and one motor access end in series, the motor driving units are connected with the central control unit, and the motor driving units are used for driving corresponding motors to work according to control instructions output by the central control unit.
Optionally, each motor driving unit includes:
the receiving end of the control circuit is connected with the central control unit, and the control circuit is used for outputting a corresponding control signal when receiving a control instruction output by the central control unit;
the input end of the motor inverter circuit is connected with the power supply access end, the output end of the motor inverter circuit is connected with one motor access end, the controlled end of the motor inverter circuit is connected with the control end of the control circuit, and the motor inverter circuit is used for converting an accessed direct current power supply into an alternating current power supply and then outputting the alternating current power supply to the accessed motor;
and/or, the input end of the motor rectifying circuit is connected with one motor access end, the output end of the motor rectifying circuit is connected with the power supply access end, the controlled end of the motor rectifying circuit is connected with the control end of the control circuit, and the motor rectifying circuit is used for converting an accessed alternating current power supply into a direct current power supply and then outputting the direct current power supply to an accessed power battery so as to charge the accessed power battery.
Optionally, the integrated controller further includes:
the input end of the pre-charging circuit is connected with the power supply access end, the output end of the pre-charging circuit is connected with the input end of the motor inverter circuit, and the pre-charging circuit is used for pre-charging the accessed motor.
Optionally, the motor driving unit is one of a range extender driving unit, a driving motor driving unit, a braking air pump driving unit and a steering oil pump driving unit.
Optionally, when one of the motor driving units is a range extender driving unit, the integrated controller further includes:
the battery detection unit is used for detecting the battery electric quantity of the power battery and outputting a corresponding electric quantity detection signal to the central control unit;
the central control unit is also used for controlling the range extender driving unit to work according to the battery power of the power battery.
Optionally, the integrated controller is further provided with a storage battery access terminal for accessing a storage battery;
the integrated controller further includes:
the input end of the voltage conversion unit is connected with the power supply access end, the output end of the voltage conversion unit is connected with the storage battery access end, the controlled end of the voltage conversion unit is connected with the central control unit, and the voltage conversion unit is used for carrying out voltage conversion on an accessed direct-current power supply and then outputting the converted direct-current power supply to the accessed storage battery.
Optionally, the integrated controller further has:
the electric defrosting output end is used for being connected with electric defrosting;
the air conditioner output end is used for accessing an air conditioner; the method comprises the steps of,
the quick charging output end is used for accessing electric equipment;
the integrated controller is also used for supplying power to the accessed electric equipment through the electric defrosting output end, the air conditioner output end and the quick charging output end.
The utility model also provides a fire engine, which comprises a power battery, a load and the electric system.
According to the utility model, the integrated controller is directly connected with the power battery and the motors, and the power supply access end and the motor access end are arranged on the integrated controller, so that the motors such as the range extender and the power battery can be directly connected with the integrated controller without electric connection through a power distribution cabinet, the power distribution cabinet arranged in the existing fire truck is eliminated, the integrated controller directly distributes and controls the motors, the discretely arranged controllers in the prior art are integrated, and the integration level of the electric system is improved, so that the circuit wiring and the framework of the electric system are simpler, and the stability and the safety of the electric system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of an electrical system according to the present utility model;
FIG. 2 is a schematic diagram of functional modules of another embodiment of an electrical system according to the present utility model;
FIG. 3 is a schematic diagram of functional modules of an embodiment of an integrated controller in an electrical system according to the present utility model;
fig. 4 is a schematic circuit diagram of an integrated controller in an electrical system according to an embodiment of the utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Water pump switch circuit | 40 | Pre-charging circuit |
| 20 | Motor inverter circuit | 50 | Motor conversion unit |
| 30 | Motor rectifying circuit |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
At present, the earth environment is increasingly worsened, global warming, species are accelerated to kill, climate change, sea level rise caused by polar glacier melting and the like are effective measures for promoting energy conservation, emission reduction and solving environmental pollution. As a branch of the automobile, new energy and intellectualization are also necessary trends, the fire engine on the market is also traditional fuel power, mechanical energy is transmitted to a water supply pump through an engine power takeoff, the engine of the vehicle has severe working conditions, the oil consumption and the emission pollution are serious, and the development of the fire engine with mixed power is an effective solving way. However, the existing new energy fire engine is generally connected with electrical equipment such as a range extender and an inverter by adopting a distribution box or a distribution cabinet, and the distribution scheme is characterized in that a distribution box is connected between the range extender and a battery as well as between the range extender and a motor, so that circuit harnesses are long, controllers of all main electric drives are discretely distributed, and poor integration is caused, such as driving motor controllers and generator controllers, so that the problems of scattered architecture, distributed arrangement, chaotic harness, complex structure, high cost, low integration and the like are caused.
To solve the above problems, the present utility model provides an electrical system for use in a fire engine, the fire engine including a power battery and a load, referring to fig. 1 to 4, in one embodiment, the electrical system includes:
at least two motors for driving a load in the fire engine;
the power supply access end of the integrated controller is used for being connected with a power battery, the integrated controller is provided with at least two motor access ends, each motor access end is used for being connected with one motor, and the integrated controller is used for controlling the connected motor to work so as to drive a load in the fire engine.
In this embodiment, be equipped with integrated control ware and power battery and a plurality of motor direct connection, through set up power access end and motor access end on integrated control ware for motor such as journey-increasing ware and power battery can be directly be connected with integrated control ware, need not to realize electrical connection through the switch board, distribute power and control to a plurality of motors by integrated control ware directness. The integrated controller may be composed of a driving unit corresponding to the motor, a voltage conversion unit 50 and a central control unit, wherein the central control unit of the integrated controller may be a central controller on the fire engine or may be a central control unit specially used for controlling a plurality of motors. The motors can be a range extender, a driving motor, a generator, a steering oil pump, a braking air pump and the like, the corresponding motors are connected to the corresponding motor connecting ends on the integrated controller, and the power distribution and control of a plurality of motors are realized by the integrated controller. For example, when the motor is a driving motor, a driving unit of the driving motor can be arranged in the integrated controller, and under the control of the central control circuit, the driving unit of the driving motor converts a direct-current power supply output by the power battery into an alternating-current power supply and outputs the alternating-current power supply to the driving motor, so that the driving motor is driven to work, and then wheels of the fire truck are driven to rotate, so that the fire truck starts to run. For another example, the motor is a generator or a range extender Cheng Qishi, a driving unit of the generator or the range extender can be arranged in the controller, and under the control of the central control circuit, the driving unit of the generator or the range extender converts an alternating current power supply output by the generator or the range extender into a direct current power supply and then charges a power battery, so that the range extending effect of the fire truck is realized. In addition, the vehicle instrument desk can be further provided with a mechanical switch, a button, a touch screen and other user input components which are connected with the integrated controller, so that a user can realize manual control of different motors through the mechanical switch, the button, the touch screen and other user input components.
It can be understood that the number of the motor access terminals can be set according to actual application requirements, only two motor access terminals can be arranged on the integrated controller, only two driving units corresponding to the two motors are arranged inside the integrated controller so as to realize the integrated use of the two motors, a plurality of motor access terminals can also be arranged, and a plurality of driving units corresponding to the motors are arranged inside the integrated controller so as to integrate the driving units of all motors in the fire truck into one integrated controller for power distribution and control. For example, in the extended range fire engine, the range extender, the driving motor, the braking air pump, the steering oil pump and the water pump are usually arranged, so that the motor access ends of the five motors can be arranged on the integrated controller, and corresponding motor driving units and the like are arranged in the integrated controller, thereby realizing the integrated control of the whole motor of the extended range fire engine by the integrated controller, integrating the controllers discretely arranged in the prior art, improving the integration level of an electrical system, leading the circuit wiring and the architecture of the electrical system to be simpler, and improving the stability and the safety of the electrical system.
According to the utility model, the integrated controller is directly connected with the power battery and the motors, and the power supply access end and the motor access end are arranged on the integrated controller, so that the motors such as the range extender and the power battery can be directly connected with the integrated controller without electric connection through a power distribution cabinet, the power distribution cabinet arranged in the existing fire truck is eliminated, the integrated controller directly distributes and controls the motors, the discretely arranged controllers in the prior art are integrated, and the integration level of the electric system is improved, so that the circuit wiring and the framework of the electric system are simpler, and the stability and the safety of the electric system are improved.
Referring to fig. 1 to 4, in an embodiment, the electrical system further comprises:
a water pump;
the input end of the water pump inverter is connected with the water pump access end of the integrated controller, and the water pump inverter is used for converting an accessed direct-current power supply into an alternating-current power supply and then outputting the alternating-current power supply;
the input end of the frequency converter is connected with the output end of the water pump inverter, the output end of the frequency converter is connected with the power supply end of the water pump, and the frequency converter is used for carrying out frequency conversion treatment on an accessed alternating current power supply and then outputting the processed alternating current power supply to the water pump so as to supply power for the water pump.
It can be understood that the power supply end of the water pump arranged on the existing fire truck is usually directly connected with the output end of the water pump inverter to directly take electricity from the water pump inverter, however, the water pump is directly connected with the water pump inverter, so that the circuit overcurrent is easily caused by large inductive load at the moment of starting the water pump, thereby the water pump inverter is burnt out, and safety faults are caused. Therefore, in this embodiment, a frequency converter is further disposed between the water pump and the water pump inverter, and the frequency converter mainly comprises a rectifying unit, a filtering unit, an inverting unit, a braking unit, a driving unit, a detecting unit and a micro-processing unit, and the frequency converter adjusts the voltage and the frequency of the output power by switching on and off the internal IGBT, and provides the required power voltage according to the actual requirement of the motor. According to the utility model, the frequency converter is arranged, and the power of the inductive load is controlled in a frequency conversion mode, so that the water pump inverter is prevented from being burnt out at the moment of starting the water pump, and the stability and the safety of an electrical system are improved.
Optionally, the integrated controller includes:
a central control unit;
the water pump switch circuit 10, the input of water pump switch circuit 10 with the power access end is connected, the output of water pump switch circuit 10 with the water pump access end is connected, the controlled end of water pump switch circuit 10 with central control unit is connected, water pump switch circuit 10 is used for when receiving the fire control signal of central control unit output, control the power access end with the water pump access end electricity is connected, so that the water pump dc-to-ac converter begins work.
In this embodiment, the integrated controller is internally integrated with the water pump switch circuit 10, and the water pump switch circuit 10 can be implemented by using switching devices such as a contactor, a relay, and a circuit breaker, and is used for controlling on/off of a loop between the power battery and the water pump inverter, and the central control unit of the integrated controller can be a central controller on a fire truck or a central control unit specially used for controlling the water pump switch circuit 10. The electric system can be further provided with user input components such as a mechanical switch, a button, a touch screen and the like which are connected with the integrated controller, so that a user can send a control instruction for controlling the water pump switch circuit 10 to be turned on/off to the central control unit through the user input components such as the mechanical switch, the button, the touch screen and the like, and when the central control unit receives the control instruction sent by the user, the water pump switch circuit 10 is controlled to be turned on/off according to the control instruction, and the water pump inverter is controlled to start working/stop working. By providing the water pump switching circuit 10, the fire engine has a driving mode and a fire-fighting mode, specifically, when the fire engine is normally running, the water pump switching circuit 10 is in an off state, and the water pump inverter is not operated at this time, that is, the driving mode. When fire water is needed to be used in a fire disaster, the fire-fighting vehicle is stopped, and a control command is issued through a user input component, such as a rocker switch on an instrument panel of a cab, to control the water pump switch circuit 10 to be closed and conducted, so that the water pump inverter starts to work, and the water pump is driven to start to work, namely a fire-fighting mode. Referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an integrated controller, in which a water pump switch circuit 10 is composed of a contactor, when the contactor is closed, a power supply access terminal is electrically connected with a water pump access terminal, and an inverter converts a power supply output by a power battery into an ac power supply and outputs the ac power supply to a water pump to drive the water pump to work.
Referring to fig. 1 to 4, in an embodiment, the integrated controller includes:
a central control unit;
the motor driving units are arranged between the power supply access end and one motor access end in series, the motor driving units are connected with the central control unit, and the motor driving units are used for driving corresponding motors to work according to control instructions output by the central control unit.
Optionally, the motor driving unit is one of a range extender driving unit, a driving motor driving unit, a braking air pump driving unit and a steering oil pump driving unit.
In the extended range fire engine, there are usually five motors, namely, an extended range device, a driving motor, a braking air pump, a steering oil pump and a water pump, so that the driving units of at least two motors of the five motors can be integrated, and the integrated controller can directly distribute and control the motors. The central control unit of the integrated controller can be a central controller on the fire engine or a central control unit specially used for controlling a plurality of motors. The user can send corresponding control instructions to the central control unit through the mechanical switch, the button, the touch screen and other user input components, and the central control unit sends the control instructions to the corresponding motor driving units, so that the corresponding motor driving units are controlled to drive the motors to work.
It can be understood that the number of the motor access terminals can be set according to actual application requirements, only two motor access terminals can be arranged on the integrated controller, only two driving units corresponding to the two motors are arranged inside the integrated controller so as to realize the integrated use of the two motors, a plurality of motor access terminals can also be arranged, and a plurality of driving units corresponding to the motors are arranged inside the integrated controller so as to integrate the driving units of all motors in the fire truck into one integrated controller for power distribution and control. For example, the motor access ends of the five motors can be arranged on the integrated controller, corresponding motor driving units and the like are arranged in the integrated controller, and the corresponding motor driving units are controlled by the central control unit to drive the motors to work according to control instructions issued by users, so that the integrated controller is used for realizing integrated control of the whole motor of the extended range fire truck, the controllers which are discretely arranged in the prior art are integrated, the integration level of an electrical system is improved, and therefore, the circuit wiring and the architecture of the electrical system are simpler, and the stability and the safety of the electrical system are improved.
Optionally, when one of the motor driving units is a range extender driving unit, the integrated controller further includes:
the battery detection unit is used for detecting the battery electric quantity of the power battery and outputting a corresponding electric quantity detection signal to the central control unit;
the central control unit is also used for controlling the range extender driving unit to work according to the battery power of the power battery.
In this embodiment, a battery detection unit is further disposed in the integrated controller, and is configured to detect a battery power of the connected power battery, where the battery detection unit may be a voltage detection circuit, calculate an SOC of the battery by detecting a battery voltage, and determine the battery power by using the obtained SOC. In the embodiment, the range extender adopts a fixed-power generation strategy, so that the fuel economy can be obviously improved, and the oil consumption and the emission can be reduced. Specifically, when the battery power of the power battery is lower than a first preset power, the central control unit controls the range extender to be started automatically, so that the engine drives the generator to generate power, and the power battery is charged. When the power battery is charged until the battery electric quantity is larger than the second preset electric quantity, the central control unit controls the range extender to stop working and stop generating power, and the power battery is circulated in a reciprocating mode, so that the power battery is full of electric quantity. The first preset electric quantity and the second preset electric quantity can be set according to actual vehicle application conditions.
Referring to fig. 1 to 4, in an embodiment, each motor driving unit includes:
the receiving end of the control circuit is connected with the central control unit, and the control circuit is used for outputting a corresponding control signal when receiving a control instruction output by the central control unit;
the input end of the motor inverter circuit 20 is connected with the power supply access end, the output end of the motor inverter circuit 20 is connected with one motor access end, the controlled end of the motor inverter circuit 20 is connected with the control end of the control circuit, and the motor inverter circuit 20 is used for converting an accessed direct current power supply into an alternating current power supply and outputting the alternating current power supply to the accessed motor;
and/or, the motor rectifying circuit 30, the input end of the motor rectifying circuit 30 is connected with a motor access end, the output end of the motor rectifying circuit 30 is connected with a power supply access end, the controlled end of the motor rectifying circuit 30 is connected with the control end of the control circuit, and the motor rectifying circuit 30 is used for converting an accessed alternating current power supply into a direct current power supply and then outputting the direct current power supply to an accessed power battery so as to charge the accessed power battery.
In this embodiment, each motor driving unit is composed of a control circuit and a motor inverter circuit 20 or a motor rectifying circuit 30, for example, when the integrated motor driving unit is a driving motor driving unit, a braking air pump driving unit or a steering oil pump driving unit, the motor driving unit includes the control circuit and the motor inverter circuit 20, and when the integrated motor driving unit is a range extender driving unit or a generator driving unit, the motor driving unit includes the control circuit and the rectifying circuit.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an integrated controller, in which four motor driving units, namely, a range extender driving unit, a driving motor driving unit, a braking air pump driving unit and a steering oil pump driving unit, are integrated, and inverter circuits for driving a motor, a braking air pump and a steering oil pump, and rectifier circuits of the range extender are all arranged between a power supply access end and a motor access end. The central control unit (not shown in the figure) outputs a corresponding control signal to a corresponding motor control circuit (not shown in the figure) according to a control instruction issued by a user, and the control circuit controls the corresponding motor inverter circuit 20 or motor rectifying circuit 30 to work, so that the integrated control of the whole vehicle motor is realized by the integrated controller. For example, when the user turns the steering wheel, that is, issues a steering control command to the central control unit, the central control unit outputs a corresponding steering control signal to the control circuit of the steering oil pump, and the control circuit of the steering oil pump controls the inverter circuit to work, and converts the direct current power supply of the power battery into the alternating current power supply and outputs the alternating current power supply to the steering oil pump, so that the steering oil pump works to complete the control of vehicle steering. It will be appreciated that protection devices such as a fuse, a fuse resistor, etc. may be further disposed between the inverter circuit or the rectifying circuit and the power supply access terminal, for example, the fuses RX1 to RX9 shown in fig. 4, so as to avoid damage to the battery or the motor due to overcurrent, overheat, etc. In addition, the control circuit in the motor driving unit can be integrated into the central control unit, and the central control unit directly performs integrated control on the motor inverter circuit 20 and the motor rectifying circuit 30, so that the response speed and the integration level of the power system can be effectively improved.
Referring to fig. 1 to 4, in an embodiment, the integrated controller further includes:
the input end of the pre-charging circuit 40 is connected with the power supply access end, the output end of the pre-charging circuit 40 is connected with the input end of the motor inverter circuit 20, and the pre-charging circuit 40 is used for pre-charging the accessed motor.
It can be understood that in the electric drive system of the new energy automobile, the power battery is connected with the motor controller, and the motor controller is provided with a capacitor with larger capacity (generally 500 uF-2000 uF), namely a bus capacitor, if the capacitor is in a zero state before power-on, namely no energy exists in the capacitor, the capacitor is equivalent to direct short circuit at the moment of circuit closing, the current can be quite large, and if the current is not limited, the large current can cause huge impact to the battery and the switch tube to damage. Therefore, in the present embodiment, a pre-charging circuit 40 is further provided between the motor inverter circuit 20 and the power supply access terminal to reduce the rush current at the time of power-up. The pre-charging circuit 40 may be composed of a switch tube and a pre-charging resistor, referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an integrated controller, in which the pre-charging circuit 40 is composed of a main circuit and a pre-charging circuit, the main circuit includes a contactor, the pre-charging circuit includes a contactor and a pre-charging resistor, when the motor is to be powered on, the contactor of the pre-charging circuit is controlled to be turned on first, so that a power supply is sent to the motor through the pre-charging resistor to reduce the impact current during the power on, and then the switch of the pre-charging resistor circuit is turned off and the contactor of the main circuit is controlled to be turned on, and the power supply is directly output to the motor by the power battery. By arranging the pre-charging circuit 40, the utility model can reduce the impact current when the motor is electrified, avoid damaging devices caused by overlarge impact current, and improve the stability and safety of the integrated controller.
Referring to fig. 1 to 4, in an embodiment, the integrated controller further has a battery access terminal for accessing a battery;
the integrated controller further includes:
the input end of the voltage conversion unit 50 is connected with the power supply access end, the output end of the voltage conversion unit 50 is connected with the storage battery access end, the controlled end of the voltage conversion unit 50 is connected with the central control unit, and the voltage conversion unit 50 is used for carrying out voltage conversion on an accessed direct current power supply and outputting the converted direct current power supply to the accessed storage battery.
It can be understood that the existing new energy automobile is usually further provided with electric equipment such as sound equipment and light, and the electric equipment is powered by a storage battery on the automobile, so in this embodiment, the integrated controller is further integrated with a voltage conversion unit 50 for converting the power supply of the power battery into the charging power supply of the storage battery to charge the storage battery. The voltage conversion unit 50 can be implemented by using a DC-DC voltage conversion circuit, so as to convert a large voltage power supply output by the power battery into a small voltage power supply that can be received by the storage battery, thereby ensuring that the storage battery can be charged by the voltage conversion unit 50 when the electric quantity of the storage battery is insufficient, and ensuring the normal use of electric equipment such as sound equipment and lamplight on a vehicle. Referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an integrated controller, in which the voltage conversion unit 50 is composed of a DC-DC voltage conversion circuit and a corresponding control circuit (not shown in the figure), and when the battery needs to be charged, the central control unit outputs a corresponding control command to the voltage conversion unit 50, so as to control the DC-DC voltage conversion circuit to perform voltage conversion, so that the power battery charges the battery.
Referring to fig. 1 to 4, in an embodiment, the integrated controller further has:
the electric defrosting output end is used for being connected with electric defrosting;
the air conditioner output end is used for accessing an air conditioner; the method comprises the steps of,
the quick charging output end is used for accessing electric equipment;
the integrated controller is also used for supplying power to the accessed electric equipment through the electric defrosting output end, the air conditioner output end and the quick charging output end.
In this embodiment, the integrated controller further has an electric defrosting output end, an air conditioner output end and a fast charging output end, and is used for being connected to an electric defrosting, air conditioning and electric warming wind power distribution equipment to wait, and a DC-DC conversion circuit and a DC-AC conversion circuit can be integrated inside the integrated controller, so that a direct current power supply output by the power battery is converted into a direct current voltage or an alternating current voltage suitable for supplying power to the power distribution equipment to wait and then is output through the power distribution access end. Referring to fig. 4, fig. 4 is a schematic circuit diagram of an embodiment of an integrated controller, in which the integrated controller leads a power supply of a power battery out of an electric defrosting output end and an air conditioner output end through wires, so that the power battery directly supplies power for the electric defrosting and the air conditioner. And a switching device is further arranged between the positive electrode of the quick-charging output end and the positive electrode end of the power battery, and when the switch is turned on, a user can quickly charge the mobile phone, the tablet and other equipment through the quick-charging output end. It can be understood that the integrated controller may further be provided with an access detection unit, which is configured to detect whether the fast-charging output end has access to the to-be-charged device, and output a corresponding detection signal when detecting that the to-be-charged device has access to the to-be-charged device, so as to control the switching device at the positive electrode end to be turned on, thereby enabling the power battery to fast charge the mobile phone and the tablet waiting charging device through the fast-charging output end.
The utility model also provides a fire engine, which comprises the electrical system, and the specific structure of the electrical system refers to the embodiment, and because the fire engine adopts all the technical schemes of all the embodiments, the fire engine at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (11)
1. An electrical system for use in a fire engine including a power cell and a load, comprising:
at least two motors for driving a load in the fire engine;
the power supply access end of the integrated controller is used for being connected with a power battery, the integrated controller is provided with at least two motor access ends, each motor access end is used for being connected with one motor, and the integrated controller is used for controlling the connected motor to work so as to drive a load in the fire engine.
2. The electrical system of claim 1, further comprising:
a water pump;
the input end of the water pump inverter is connected with the water pump access end of the integrated controller, and the water pump inverter is used for converting an accessed direct-current power supply into an alternating-current power supply and then outputting the alternating-current power supply;
the input end of the frequency converter is connected with the output end of the water pump inverter, the output end of the frequency converter is connected with the power supply end of the water pump, and the frequency converter is used for carrying out frequency conversion treatment on an accessed alternating current power supply and then outputting the processed alternating current power supply to the water pump so as to supply power for the water pump.
3. The electrical system of claim 2, wherein the integrated controller comprises:
a central control unit;
the water pump switch circuit, the input of water pump switch circuit with the power access end is connected, the output of water pump switch circuit with the water pump access end is connected, the controlled end of water pump switch circuit with central control unit is connected, water pump switch circuit is used for when receiving the fire control signal of central control unit output, control the power access end with the water pump access end electricity is connected, so that the water pump dc-to-ac converter begins work.
4. The electrical system of claim 1, wherein the integrated controller comprises:
a central control unit;
the motor driving units are arranged between the power supply access end and one motor access end in series, the motor driving units are connected with the central control unit, and the motor driving units are used for driving corresponding motors to work according to control instructions output by the central control unit.
5. The electrical system of claim 4, wherein each motor drive unit comprises:
the receiving end of the control circuit is connected with the central control unit, and the control circuit is used for outputting a corresponding control signal when receiving a control instruction output by the central control unit;
the input end of the motor inverter circuit is connected with the power supply access end, the output end of the motor inverter circuit is connected with one motor access end, the controlled end of the motor inverter circuit is connected with the control end of the control circuit, and the motor inverter circuit is used for converting an accessed direct current power supply into an alternating current power supply and then outputting the alternating current power supply to the accessed motor;
and/or, the input end of the motor rectifying circuit is connected with one motor access end, the output end of the motor rectifying circuit is connected with the power supply access end, the controlled end of the motor rectifying circuit is connected with the control end of the control circuit, and the motor rectifying circuit is used for converting an accessed alternating current power supply into a direct current power supply and then outputting the direct current power supply to an accessed power battery so as to charge the accessed power battery.
6. The electrical system of claim 5, wherein the integrated controller further comprises:
the input end of the pre-charging circuit is connected with the power supply access end, the output end of the pre-charging circuit is connected with the input end of the motor inverter circuit, and the pre-charging circuit is used for pre-charging the accessed motor.
7. The electrical system of claim 4, wherein the motor drive unit is one of a range extender drive unit, a drive motor drive unit, a brake air pump drive unit, and a steering oil pump drive unit.
8. The electrical system of claim 7, wherein when one of the motor drive units is a range extender drive unit, the integrated controller further comprises:
the battery detection unit is used for detecting the battery electric quantity of the power battery and outputting a corresponding electric quantity detection signal to the central control unit;
the central control unit is also used for controlling the range extender driving unit to work according to the battery power of the power battery.
9. The electrical system of claim 4, wherein the integrated controller further has a battery access terminal for accessing a battery;
the integrated controller further includes:
the input end of the voltage conversion unit is connected with the power supply access end, the output end of the voltage conversion unit is connected with the storage battery access end, the controlled end of the voltage conversion unit is connected with the central control unit, and the voltage conversion unit is used for carrying out voltage conversion on an accessed direct-current power supply and then outputting the converted direct-current power supply to the accessed storage battery.
10. The electrical system of claim 1, wherein the integrated controller further has:
the electric defrosting output end is used for being connected with electric defrosting;
the air conditioner output end is used for accessing an air conditioner; the method comprises the steps of,
the quick charging output end is used for accessing electric equipment;
the integrated controller is also used for supplying power to the accessed electric equipment through the electric defrosting output end, the air conditioner output end and the quick charging output end.
11. A fire engine comprising a power cell, a load and an electrical system as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136035.9U CN219659604U (en) | 2023-05-10 | 2023-05-10 | Electrical system and fire engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136035.9U CN219659604U (en) | 2023-05-10 | 2023-05-10 | Electrical system and fire engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659604U true CN219659604U (en) | 2023-09-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321136035.9U Active CN219659604U (en) | 2023-05-10 | 2023-05-10 | Electrical system and fire engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659604U (en) |
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2023
- 2023-05-10 CN CN202321136035.9U patent/CN219659604U/en active Active
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