Intelligent braking circuit and device for vehicle

Abstract

The utility model relates to a vehicle brake control technology, and discloses a vehicle intelligent brake circuit and device, a direct current motor provides electric energy through an energy storage unit in a vehicle driving process, and a hardware control unit is used for controlling the operation of the direct current motor; the hardware control unit comprises a rectifying circuit unit, a direct-current booster circuit unit, a pulse width modulation unit and a braking unit; the rectifying circuit unit is used for rectifying and outputting the current of the direct-current motor and conveying the rectified and output current to the braking unit and the direct-current booster circuit unit, and the pulse width modulation unit is used for controlling the current of the braking unit; the direct-current booster circuit unit is used for controlling the voltage of the energy storage unit; the intelligent brake circuit designed by the utility model is simple in circuit design, low in power consumption and high in energy recovery efficiency.

Description

Technical Field

[0001] The utility model relates to a vehicle braking control technology, in particular to a vehicle intelligent braking circuit and device. Background Art

[0002] At present, the fuel of automobiles is mainly fossil fuel. By recovering the braking energy of the automobile, on the one hand, it can reduce the fuel consumption caused by forced deceleration when the automobile brakes; on the other hand, the recovered energy can be used for starting the car, which can reduce the engine fuel consumption when the car starts. The engine mixture is relatively rich when starting.

[0003] For example, in the prior art, patent application number: CN201410781338.5, an automobile intelligent braking device, including: a transmission wheel group, which includes a driving wheel and a driven wheel connected to it through a transmission belt, the driving wheel is arranged on the automobile drive shaft; and an air pump control clutch, one end of which is connected to the driven wheel and the other end is connected to the air pump, the air pump control clutch includes a cylinder and a piston that cooperates with it, and a spring member, the spring member is arranged between the cylinder and the piston and connected to the cylinder and the piston, when the car is driving normally, the spring member is in a stretched state, and the cylinder and the piston are in a separated state. . Summary of the invention

[0004] The utility model aims at the shortcomings of complex design and low recovery efficiency of the intelligent brake designed in the prior art, and provides a vehicle intelligent braking circuit and device.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A vehicle intelligent braking circuit comprises a DC motor, an energy storage unit and a hardware control unit; the DC motor is provided with electric energy through the energy storage unit during vehicle driving, and the hardware control unit is used to control the operation of the DC motor.

[0007] Preferably, the hardware control unit includes a rectifier circuit unit, a DC boost circuit unit, a pulse width modulation unit and a brake unit;

[0008] The rectifier circuit unit is used to rectify and output the current of the DC motor, and transmit the rectified output current to the brake unit and the DC boost circuit unit. The pulse width modulation unit is used to control the current of the brake unit; the DC boost circuit unit is used to control the voltage of the energy storage unit.

[0009] Preferably, the braking unit includes a charging braking unit and a resistance braking unit. The charging braking unit controls the magnitude of the charging current through the charging braking signal of the pulse width modulation unit, and the resistance braking unit controls the magnitude of the current flowing through the power resistor through the resistance braking signal of the pulse width modulation unit.

[0010] Preferably, the DC boost circuit unit includes a first-stage boost circuit unit and a second-stage boost circuit unit; the first-stage boost circuit unit and the second-stage boost circuit unit are connected in series with each other, the first-stage boost circuit unit is used to boost the input voltage, and the second-stage boost circuit unit is used to further increase the output voltage of the first-stage boost circuit unit.

[0011] Preferably, the first-stage boost circuit unit includes an inductor L3, a transistor Q1, a diode D5 and a capacitor C4, one end of the inductor L3 is connected to one end of the transistor Q1 and the anode of the diode D5, and the other end is connected to the positive electrode of the input power supply; the cathode of the diode D5 is connected to one end of the capacitor C4 and the second-stage boost circuit unit;

[0012] The second-stage boost circuit unit includes an inductor L4, a transistor Q2, a diode D6 and a capacitor C2. One end of the inductor L4 is connected to one end of the transistor Q2 and the anode of the diode D2, and the other end is connected to the cathode of the diode D5; the cathode of the diode D6 is connected to one end of the capacitor C5.

[0013] Preferably, the rectifier circuit unit comprises a rectifier bridge, a filter capacitor and a synchronous switch control unit; the rectifier bridge is composed of four diodes; the rectifier bridge, the filter capacitor and the synchronous switch control unit are connected in parallel.

[0014] Preferably, the rectifier circuit unit further includes an action switch control unit, which includes a first switch and a second switch, wherein the first switch and the second switch are connected in series; and the action switch control unit is connected in parallel with the output end of the rectifier bridge.

[0015] In order to solve the above technical problems, the utility model also includes a vehicle intelligent braking circuit device, including a vehicle intelligent braking circuit.

[0016] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0017] The intelligent braking circuit designed by the utility model has simple circuit design, low power consumption and high energy recovery efficiency.

[0018] The intelligent brake designed by the utility model greatly reduces the use of the vehicle service brake. The vehicle service brake is only used in emergency braking, thereby extending the service life of the vehicle service brake and ensuring the safety of vehicle driving; since the use rate of the service brake is reduced, the braking noise when the vehicle brakes is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a system diagram of the utility model.

[0020] Figure 2 It is a system diagram of the hardware control unit of Example 1 of the present utility model.

[0021] Figure 3 This is a circuit diagram of a rectifier circuit unit of the utility model.

[0022] Figure 4 This is a circuit diagram of a rectifier circuit unit in Embodiment 2 of the present utility model.

[0023] Figure 5 The utility model is a circuit diagram of a DC boost circuit unit. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] A vehicle intelligent braking circuit, Figure 1 The system includes a DC motor, an energy storage unit, and a hardware control unit; the DC motor is provided with electrical energy through the energy storage unit during vehicle driving, and the hardware control unit is used to control the operation of the DC motor.

[0027] Figure 2 In the embodiment, the hardware control unit includes a rectifier circuit unit, a DC boost circuit unit, a pulse width modulation unit and a brake unit;

[0028] The rectifier circuit unit is used to rectify and output the current of the DC motor, and transmit the rectified output current to the brake unit and the DC boost circuit unit. The pulse width modulation unit is used to control the current of the brake unit; the DC boost circuit unit is used to control the voltage of the energy storage unit.

[0029] The braking unit includes a charging braking unit and a resistance braking unit. The charging braking unit controls the magnitude of the charging current through the charging braking signal of the pulse width modulation unit, and the resistance braking unit controls the magnitude of the current flowing through the power resistor through the resistance braking signal of the pulse width modulation unit.

[0030] The DC boost circuit unit includes a first-stage boost circuit unit and a second-stage boost circuit unit; the first-stage boost circuit unit and the second-stage boost circuit unit are connected in series, the first-stage boost circuit unit is used to boost the input voltage, and the second-stage boost circuit unit is used to further increase the output voltage of the first-stage boost circuit unit.

[0031] Figure 5The first-stage boost circuit unit includes an inductor L3, a transistor Q1, a diode D5 and a capacitor C4. One end of the inductor L3 is connected to one end of the transistor Q1 and the anode of the diode D5, and the other end is connected to the positive electrode of the input power supply; the cathode of the diode D5 is connected to one end of the capacitor C4 and the second-stage boost circuit unit;

[0032] The second-stage boost circuit unit includes an inductor L4, a transistor Q2, a diode D6 and a capacitor C2. One end of the inductor L4 is connected to one end of the transistor Q2 and the anode of the diode D2, and the other end is connected to the cathode of the diode D5; the cathode of the diode D6 is connected to one end of the capacitor C5.

[0033] The rectifier circuit unit includes a rectifier bridge, a filter capacitor and a synchronous switch control unit; the rectifier bridge is composed of four diodes; the rectifier bridge, the filter capacitor and the synchronous switch control unit are connected in parallel. Figure 3 In the embodiment, the rectifier bridge includes diodes D1 to D4; the synchronous switch control unit includes a switch S1, one end of the switch S1 is connected to an inductor L1 which is connected in parallel with the input end of the rectifier bridge, and the filter capacitor is C2.

[0034] Example 2

[0035] Based on the first embodiment, the rectifier circuit unit of this embodiment further includes an action switch control unit. Figure 4 In the embodiment, the action switch control unit includes a first switch S2 and a second switch S3, the first switch S2 and the second switch S3 are connected in series; the first switch S2 is connected to one end of the rectifier bridge, and the other end of the first switch S2 is connected to the second switch S3.

[0036] When the current is at its maximum in the forward direction, close switch S1. Disconnect S2 and S3, store the charge in C2, then disconnect S1 and wait for the current source to reverse again; as the voltage of C2 increases and reaches the threshold turn-on voltage, S3 disconnects and S2 closes, the charge on C2 is quickly transferred and stored in the output capacitor C1, the energy on the inductor L2 continues to increase, and the load is powered at the same time. At this time, the control signal disconnects S2 and closes S3, the current on L2 begins to decrease, and when the voltage across the load is less than the voltage across C1, C1 also starts to power the load, the above process is repeated, and the voltage can reach a stable value. When the input current is at its maximum in the negative direction, the actions of switches S1, S2, and S3 are similar to those in the forward direction. If the voltage of C2 does not reach the threshold turn-on voltage, S2 is disconnected, and the current is continuously stored in C2, waiting for the voltage to reach the threshold turn-on voltage again.

[0037] Example 3

[0038] Based on the above embodiments, this embodiment is a vehicle intelligent braking device.

Claims

1. A vehicle intelligent braking circuit, comprising a DC motor, an energy storage unit, and a hardware control unit; It is characterized in that When the vehicle is running, the DC motor is provided with electrical energy through the energy storage unit, and the hardware control unit is used to control the operation of the DC motor.

2. A vehicle intelligent braking circuit according to claim 1, It is characterized in that The hardware control unit includes a rectifier circuit unit, a DC boost circuit unit, a pulse width modulation unit and a brake unit; The rectifier circuit unit is used to rectify and output the current of the DC motor, and transmit the rectified output current to the brake unit and the DC boost circuit unit. The pulse width modulation unit is used to control the current of the brake unit; the DC boost circuit unit is used to control the voltage of the energy storage unit.

3. A vehicle intelligent braking circuit according to claim 2, It is characterized in that The braking unit includes a charging braking unit and a resistance braking unit. The charging braking unit controls the magnitude of the charging current through the charging braking signal of the pulse width modulation unit, and the resistance braking unit controls the magnitude of the current flowing through the power resistor through the resistance braking signal of the pulse width modulation unit.

4. A vehicle intelligent braking circuit according to claim 2, It is characterized in that The DC boost circuit unit includes a first-stage boost circuit unit and a second-stage boost circuit unit; the first-stage boost circuit unit and the second-stage boost circuit unit are connected in series, the first-stage boost circuit unit is used to boost the input voltage, and the second-stage boost circuit unit is used to further increase the output voltage of the first-stage boost circuit unit.

5. A vehicle intelligent braking circuit according to claim 2, It is characterized in that The first-stage boost circuit unit includes an inductor L3, a transistor Q1, a diode D5 and a capacitor C4. One end of the inductor L3 is connected to one end of the transistor Q1 and the anode of the diode D5, and the other end is connected to the positive electrode of the input power supply; the cathode of the diode D5 is connected to one end of the capacitor C4 and the second-stage boost circuit unit; The second-stage boost circuit unit includes an inductor L4, a transistor Q2, a diode D6 and a capacitor C2. One end of the inductor L4 is connected to one end of the transistor Q2 and the anode of the diode D2, and the other end is connected to the cathode of the diode D5; the cathode of the diode D6 is connected to one end of the capacitor C5.

6. A vehicle intelligent braking circuit according to claim 2, It is characterized in that The rectifier circuit unit comprises a rectifier bridge, a filter capacitor and a synchronous switch control unit; the rectifier bridge is composed of four diodes; the rectifier bridge, the filter capacitor and the synchronous switch control unit are connected in parallel.

7. A vehicle intelligent braking circuit according to claim 6, It is characterized in that The rectifier circuit unit also includes an action switch control unit, which includes a first switch and a second switch, wherein the first switch and the second switch are connected in series; and the action switch control unit is connected in parallel with the output end of the rectifier bridge.

8. A vehicle intelligent braking device, It is characterized in that A vehicle intelligent braking circuit comprising any one of claims 1-6.

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