Energy consumption circuit, brake and vehicle

Abstract

The utility model discloses an energy consumption circuit, a brake and a vehicle. The circuit comprises a control end; a ground terminal; an electromagnetic valve induction coil module; the energy consumption circuit comprises a first end and a second end, and the energy consumption circuit is connected with the electromagnetic valve induction coil module in parallel; the power supply module is respectively connected with the first end and the grounding end; and the field effect transistor comprises a third end, a fourth end and a fifth end, the third end is connected with the second end, the fourth end is connected with the control end, and the fifth end is connected with the grounding end. According to the embodiment of the invention, energy in the coil turn-off process can be consumed, and a response scene is met.

Description

Technical Field

[0001] This application relates to an energy consumption circuit, a brake, and a vehicle, and belongs to the field of control circuits. Background Technology

[0002] Automotive braking systems use solenoid valves to control fluid passages. When the solenoid valve is energized, the electromagnetic force generated by the coil lifts the closing element from the valve seat, thus opening the valve. When the power is off, the electromagnetic force disappears, and the spring presses the closing element back onto the valve seat, closing the valve. Because the magnetic energy stored in the coil is released when the power is off, a transient negative voltage may be generated, which can damage the circuitry containing the coil.

[0003] There is currently no effective solution to the above problems. Utility Model Content

[0004] In view of this, this application provides an energy consumption circuit, a brake, and a vehicle, which are designed to consume energy during the coil turn-off process to meet the requirements of the response scenario.

[0005] According to one aspect of the present invention, an energy consumption circuit is provided, comprising: a control terminal; a ground terminal; a solenoid valve induction coil module; an energy dissipation circuit including a first terminal and a second terminal, the energy dissipation circuit being connected in parallel with the solenoid valve induction coil module; a power supply module being connected to the first terminal and the ground terminal respectively; and a field-effect transistor including a third terminal, a fourth terminal and a fifth terminal, the third terminal being connected to the second terminal, the fourth terminal being connected to the control terminal, and the fifth terminal being connected to the ground terminal.

[0006] Furthermore, the field-effect transistor is an N-channel field-effect transistor, the third terminal is the drain, the fourth terminal is the gate, and the fifth terminal is the source.

[0007] Furthermore, the energy-consuming circuit includes a fast recovery diode and a TVS diode connected in series, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the negative terminal of the TVS diode.

[0008] Furthermore, the power dissipation circuit includes a fast recovery diode, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the positive terminal of the fast recovery diode.

[0009] Furthermore, the power supply module is a DC power supply module.

[0010] According to another aspect of the present invention, a brake is also provided, including the energy consumption circuit of the above embodiment.

[0011] According to another aspect of the present invention, a vehicle is also provided, including the brake of the above embodiment.

[0012] Compared with the prior art, the embodiments of this application have the following beneficial effects:

[0013] In this embodiment, the circuit includes: a control terminal; a ground terminal; a solenoid valve induction coil module; an energy-consuming circuit including a first terminal and a second terminal, the energy-consuming circuit being connected in parallel with the solenoid valve induction coil module; a power supply module, the power supply module being connected to the first terminal and the ground terminal respectively; and a field-effect transistor including a third terminal, a fourth terminal, and a fifth terminal, the third terminal being connected to the second terminal, the fourth terminal being connected to the control terminal, and the fifth terminal being connected to the ground terminal. This embodiment uses the energy-consuming circuit to dissipate the energy stored in the coil, thereby avoiding damage to the circuit containing the coil caused by the switch being turned off. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an energy consumption circuit provided in an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of another energy consumption circuit provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of another energy consumption circuit provided in an embodiment of this application. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] like Figures 1 to 3 As shown, the energy consumption circuit may include: a control terminal (not shown); a ground terminal GND; a solenoid valve induction coil module; an energy dissipation circuit, including a first terminal and a second terminal, wherein the energy dissipation circuit is connected in parallel with the solenoid valve induction coil module; a power supply module, wherein the power supply module is connected to the first terminal and the ground terminal respectively; and a field-effect transistor, including a third terminal, a fourth terminal and a fifth terminal, wherein the third terminal is connected to the second terminal, the fourth terminal is connected to the control terminal, and the fifth terminal is connected to the ground terminal.

[0021] The aforementioned control terminal can receive brake switch press operation commands, as well as other control signals, such as commands from the electronic control unit (ECU), sensor feedback signals, or commands from the remote control system.

[0022] The aforementioned solenoid valve induction coil module is responsible for generating electromagnetic force to control the opening and closing of the valve. Optionally, the solenoid valve induction coil module may include an electromagnetic coil L1, or it may include an electromagnetic coil, an iron core, and a housing; this is not limited here.

[0023] The aforementioned energy-consuming circuit is a circuit designed to consume energy, typically converting electrical energy into heat or other forms of energy.

[0024] The aforementioned field-effect transistor (FET) is a semiconductor device that primarily relies on the electric field effect to control the flow of current. It consists of three electrodes: a gate, a source, and a drain. By changing the gate voltage, the current between the source and drain can be controlled, thus achieving current switching control.

[0025] The aforementioned power supply module typically includes power semiconductor devices, magnetic components, filter capacitors, protection components, etc., and has functions such as power supply, power conversion, power control, and power protection. Optionally, the power supply module is a DC power supply module.

[0026] Furthermore, the field-effect transistor is an N-channel field-effect transistor Q1 or Q3, the third terminal is the drain, the fourth terminal is the gate, and the fifth terminal is the source.

[0027] Optionally, the power dissipation circuit includes a fast recovery diode D1, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the positive terminal of the fast recovery diode.

[0028] This embodiment achieves energy consumption by adding a new current path after shutdown, namely through the loop provided by the electromagnetic coil and the fast recovery diode. Specifically, the test conditions were: DC power supply set to 13V, control signal 20K with 80% duty cycle; the test result was that the coil current dropped to 0mA in 12.76ms during the shutdown process.

[0029] In the above embodiment, the coil current decreases slowly for more than 10ms. This cannot meet the design requirements for applications requiring rapid response. Therefore, a TVS diode is added to achieve the required rapid response. Specifically, the power dissipation circuit includes a fast recovery diode D1 and a TVS diode D2 connected in series, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the negative terminal of the TVS diode.

[0030] It should be noted that during the coil turn-off process, the drain voltage of the N-channel MOSFET will rise. When the voltage reaches the breakdown voltage of the TVS diode, the conduction path composed of the fast recovery diode and the TVS diode will be used for the freewheeling current of the coil. By increasing the voltage drop across the freewheeling circuit, the energy stored in the coil can be quickly consumed, thereby shortening the freewheeling time and meeting the system's fast response requirements. Specifically, the test conditions were: DC power supply set to 13V, control signal 20K 80% duty cycle; the test result was: the time for the coil current to drop to 0mA during the turn-off process was 0.92ms.

[0031] In some embodiments, this embodiment also provides a brake, including the energy consumption circuit of the above embodiment.

[0032] In some embodiments, this embodiment also provides a vehicle including the brakes described above.

[0033] The above description is only a preferred embodiment of this patent, but the protection scope of this patent is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed in this patent, based on the technical solution and utility model concept of this patent, shall fall within the protection scope of this patent.

Claims

1. An energy-consuming circuit, characterized in that, include: Control terminal; Grounding terminal; Solenoid valve induction coil module; The energy-consuming circuit includes a first terminal and a second terminal, and the energy-consuming circuit is connected in parallel with the solenoid valve induction coil module; The power module is connected to the first terminal and the ground terminal respectively; The field-effect transistor includes a third terminal, a fourth terminal, and a fifth terminal. The third terminal is connected to the second terminal, the fourth terminal is connected to the control terminal, and the fifth terminal is connected to the ground terminal.

2. The energy consumption circuit according to claim 1, characterized in that, The field-effect transistor is an N-channel field-effect transistor, the third terminal is the drain, the fourth terminal is the gate, and the fifth terminal is the source.

3. The energy consumption circuit according to claim 1 or 2, characterized in that, The power dissipation circuit includes a fast recovery diode and a TVS diode connected in series, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the negative terminal of the TVS diode.

4. The energy consumption circuit according to claim 1 or 2, characterized in that, The power dissipation circuit includes a fast recovery diode, with the first terminal being the negative terminal of the fast recovery diode and the second terminal being the positive terminal of the fast recovery diode.

5. The energy consumption circuit according to claim 1, characterized in that, The power module is a DC power module.

6. A brake, characterized in that, Includes the energy consumption circuit as described in any one of claims 1 to 5.

7. A vehicle, characterized in that, Includes the brake as described in claim 6.

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