Steep slope descent control system with electromagnetic brake, electric vehicle and steep slope descent control method

Abstract

A steep slope descent control system with electromagnetic brakes, an electric vehicle and a steep slope descent control method, comprising: an accelerator, a controller, a drive motor, an electromagnetic brake, a power supply and a steep slope descent control switch. The accelerator is connected to the controller. The power supply is respectively connected to the controller and the electromagnetic brake, and a steep slope descent control switch is provided between the power supply and the electromagnetic brake. The controller is connected to the drive motor and the electromagnetic brake, and the drive motor is connected to the electromagnetic brake. A reversing signal port is provided on the controller, and the power supply is also connected to the reversing signal port, and the reversing signal port is used to send a negative electric signal to the controller. The steep slope descent control switch is used to control the current conduction of the power supply to the reversing signal port and the electromagnetic brake port respectively. When going downhill, the steep slope descent control switch is closed, the electromagnetic brake is turned on, and the vehicle is switched to reverse gear. Due to gravity, the wheels rotate to generate electricity, and the drive motor rotates in the opposite direction to generate an upward braking force, and the vehicle descends slowly, avoiding damage to vehicle components due to emergency stops, and the safety of the vehicle is also improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a steep slope descent control system with electromagnetic brakes, an electric vehicle, and a steep slope descent control method. Background Art

[0002] When a vehicle is going down a steep slope, gravity will generate a downward force, causing the vehicle to accelerate downhill. In order to prevent the vehicle from automatically accelerating, speed control is usually performed by stepping on the brakes or applying reverse voltage to the motor.

[0003] For drive motors with electromagnetic brakes, since the electromagnetic brakes on the drive motors are controlled by the accelerator, in order to achieve deceleration, the accelerator is usually released. Once the accelerator is released, the electromagnetic brakes close and then enter the braking state. This will cause the vehicle to stop suddenly when going downhill. In severe cases, the motor spindle, electromagnetic brake pads and other components will be damaged. Damage to vehicle components is also beneficial to the safety of the vehicle.

[0004] Usually the electromagnetic brake of the motor is used for parking. The normal use method is to brake only after the vehicle is completely stopped. It can be called an electromagnetic parking device. When going down a steep slope, if the vehicle is not completely stopped, the electromagnetic brake will close, which is easy to cause brake damage and the phenomenon of being unable to brake. Summary of the invention

[0005] The present application provides a steep slope descent control system with electromagnetic brakes, an electric vehicle and a steep slope descent control method, the main purpose of which is to avoid the phenomenon of damage to vehicle parts due to sudden stopping of the vehicle and to improve the safety of the vehicle when going downhill.

[0006] In one embodiment of the present application, a steep slope descent control system with an electromagnetic brake is provided, comprising: an accelerator, a controller, a drive motor, an electromagnetic brake, a power supply, and a steep slope descent control switch;

[0007] The accelerator is connected to the controller and is used to send an acceleration signal to the controller;

[0008] The power supply is connected to the controller and the electromagnetic brake respectively, and is used to supply power to the controller and the electromagnetic brake respectively, and the steep slope descent switch is arranged between the power supply and the electromagnetic brake;

[0009] The controller is connected to the drive motor and the electromagnetic brake, and is used to receive the acceleration signal of the accelerator and conduct current to the drive motor and the electromagnetic brake respectively. The controller is also used to control the rotation and rotation direction of the drive motor; the drive motor is connected to the electromagnetic brake;

[0010] A reversing signal port is provided on the controller, and the power supply is also connected to the reversing signal port. The power supply is used to supply power to the reversing signal port, and the reversing signal port is used to send a negative electrical signal to the controller; the steep slope descent switch is used to control the current conduction of the power supply to the reversing signal port and the electromagnetic brake port respectively.

[0011] In one embodiment, the reversing signal port and the steep slope descent switch are connected via a reversing signal line, the reversing signal line has a unidirectional current flow direction, and the current flow direction on the reversing signal line is from the steep slope descent switch to the reversing signal port.

[0012] In one embodiment, a power port is provided on the controller, and the power source is connected to the controller via the power port.

[0013] In one embodiment, the controller is provided with an electromagnetic brake port, and the electromagnetic brake port is connected to the electromagnetic brake.

[0014] In one embodiment, the current flows in one direction between the controller and the electromagnetic brake, and the current flows from the electromagnetic brake port to the electromagnetic brake.

[0015] In one embodiment, a diode is provided between the electromagnetic brake port and the electromagnetic brake, and the diode is used to realize the unidirectional current flow.

[0016] In one embodiment, the electromagnetic brake port and the electromagnetic brake are connected via a first power line and a second power line, and a first diode and a second diode are respectively provided on the first power line and the second power line.

[0017] In one embodiment, a drive motor port is provided on the controller, and the drive motor port is connected to the drive motor.

[0018] An electric vehicle comprises the above-mentioned steep slope descent control system with electromagnetic brake.

[0019] A steep slope descent method for an electric vehicle, using the electric vehicle, the method steps are: when braking is required on a downhill slope, closing the steep slope descent switch and / or pressing the accelerator.

[0020] According to the steep slope descent system with electromagnetic brake in the above embodiment, since the power supply and the electromagnetic brake are connected, the steep slope descent switch can be closed when going downhill to supply power to the electromagnetic brake, and the electromagnetic brake is in the power-on state, and the brake is released. The steep slope descent switch is closed, and the reversing signal port sends a negative electric signal to the controller, and the controller controls the drive motor to rotate in the opposite direction, and the drive motor enters the excitation braking state, and the vehicle switches to the reverse gear. When going downhill, due to the component force of gravity, the wheels rotate to generate electricity, and the drive motor rotates in the opposite direction to generate an upward braking force. The faster the motor rotates, the greater its braking force, so the vehicle can maintain a uniform speed or a slow descent state. When realizing slow descent, press the steep slope descent switch, and the drive motor does not consume the power of the power supply, which is more energy-saving and environmentally friendly. If the vehicle needs to stop or reverse when going downhill, step on the accelerator, the drive motor will generate a larger reverse driving force, and cooperate with the steep slope descent switch, so that the vehicle stops faster or even reverses, and the safety of the vehicle is improved. The steep slope descent control system designed by the vehicle can not only achieve slow descent, but also protect the vehicle components from excessive braking impact. The designed steep slope descent control system has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a steep slope descent control system with electromagnetic brakes in one embodiment of the present application. DETAILED DESCRIPTION

[0022] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0023] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0024] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0025] like Figure 1 As shown, in one embodiment, a steep slope descent control system with electromagnetic brakes includes: an accelerator 1, a controller 2, a drive motor 3, an electromagnetic brake 4, a power supply 5 and a steep slope descent control switch 6.

[0026] The accelerator 1 is connected to the controller 2 and is used to send an acceleration signal to the controller 2 .

[0027] The power supply 5 is connected to the controller 2 and the electromagnetic brake 4 respectively, and is used to supply power to the controller 2 and the electromagnetic brake 4 respectively. A steep slope descent switch 6 is arranged between the power supply 5 and the electromagnetic brake 4 .

[0028] The controller 2 is connected to the drive motor 3 and the electromagnetic brake 4, and is used to receive the acceleration signal of the accelerator 1 and conduct current to the drive motor 3 and the electromagnetic brake 4 respectively. The controller 2 is also used to control the rotation and rotation direction of the drive motor 3. The drive motor 3 and the electromagnetic brake 4 are connected.

[0029] The controller 2 is provided with a reversing signal port 22, and the power supply 5 is also connected to the reversing signal port 22. The power supply 5 is used to supply power to the reversing signal port 22, and the reversing signal port 22 is used to send a negative electric signal to the controller 2. The steep slope descent switch 6 is used to control the current conduction of the power supply 5 to the reversing signal port 22 and the electromagnetic brake port 23.

[0030] The steep slope descent system with electromagnetic brake in the above embodiment is adopted, hereinafter referred to as the steep slope descent system. Since the power supply 5 is connected to the electromagnetic brake 4, the steep slope descent switch 6 can be closed when going downhill to supply power to the electromagnetic brake 4, and the electromagnetic brake 4 is in the power-on open state, and the brake is released. The steep slope descent switch 6 is closed, and the reversing signal port 22 sends a negative electric signal to the controller 2, and the controller 2 controls the drive motor 3 to rotate in the opposite direction, and the drive motor 3 enters the excitation braking state, and the vehicle switches to the reverse gear. When going downhill, due to the component force of gravity, the wheels rotate to generate electricity, and the drive motor 3 rotates in the opposite direction to generate an upward braking force. The faster the motor rotates, the greater its braking force, so the vehicle can maintain a uniform speed or a slowly descending state. When realizing slow descent, the steep slope descent switch 6 is pressed, and the drive motor 3 does not consume the power of the power supply 5, which is more energy-saving and environmentally friendly. If the vehicle needs to stop or reverse when going downhill, the accelerator 1 is stepped on, and the drive motor 3 will generate a larger reverse driving force, and cooperate with the steep slope descent switch 6, so that the vehicle stops faster or even reverses, and the safety of the vehicle is improved. The steep slope descent control system designed by the vehicle can not only achieve slow descent, but also protect the vehicle components from excessive braking impact. The designed steep slope descent control system has a simple structure and low cost.

[0031] The designed controller 2 has the functions of opening / closing and advancing / reversing the electromagnetic brake 4. When the controller 2 supplies power to the electromagnetic brake 4, the electromagnetic brake 4 can be in a state of power-on and power-off to release the brake. When the power supply to the electromagnetic brake 4 is stopped, the electromagnetic brake 4 is in a state of power-off and closing. Under normal circumstances, if the steep slope descent switch 6 is not pressed, the controller 2 can control the drive motor 3 to rotate forward, and the drive motor 3 obtains the driving force for forward movement. When the steep slope descent switch 6 is pressed, the controller 2 controls the drive motor 3 to rotate in the reverse direction, and the drive motor 3 obtains the braking force for reverse movement.

[0032] In one embodiment, the reversing signal port 22 and the steep slope descent switch 6 are connected by a reversing signal line, and the reversing signal line is a unidirectional current flow direction, and the current flow direction on the reversing signal line is from the steep slope descent switch 6 to the reversing signal port 22. By setting the reversing signal line, the reversing function is realized, the structure is simple, and the cost is low. The steep slope descent switch 6 can simultaneously control the current conduction state of the reversing signal line and the electromagnetic brake 4, avoids setting a reversing switch for the reversing signal port 22, simplifies the structural design, and reduces the cost.

[0033] In one embodiment, a power port 21 is provided on the controller 2 , and the power supply 5 is connected to the controller 2 via the power port 21 and supplies power to the controller 2 .

[0034] In one embodiment, the controller 2 is provided with an electromagnetic brake port 23, and the electromagnetic brake port 23 is connected to the electromagnetic brake 4. The power supply 5 supplies power to the controller 2, and the controller 2 can supply power to the electromagnetic brake 4 through the electromagnetic brake port 23 to control the opening or closing of the electromagnetic brake 4.

[0035] In one embodiment, the current flows in one direction between the controller 2 and the electromagnetic brake 4, and the current flows from the electromagnetic brake port 23 to the electromagnetic brake 4. The unidirectional current flow protects the controller 2 better, and prevents the current provided by the power supply 5 from flowing back from the electromagnetic brake 4 to the electromagnetic brake port 23, so that the controller 2 can work normally. Specifically, in one embodiment, a diode is provided between the electromagnetic brake port 23 and the electromagnetic brake 4, and the diode is used to realize the unidirectional current flow, and ensure that the electromagnetic brake 4 does not generate a reverse voltage shock to the controller 2. The unidirectional current guidance between the electromagnetic brake port 23 and the electromagnetic brake 4 is realized by the diode, which has a simple structure and low cost.

[0036] In one embodiment, the electromagnetic brake port 23 and the electromagnetic brake 4 are connected via a first power line 231 and a second power line 232, and a first diode 233 and a second diode 234 are respectively disposed on the first power line 231 and the second power line 232. Figure 1 As shown, the current flow direction on the first power line 231 and the second power line 232 is a clockwise current flow direction. When the positive current of the power source 5 flows out, due to the setting of the second diode 234, the current cannot flow into the second diode 234. When the current flows to the first diode 233, since the first diode 233 is short-circuited, the current returns to the negative electrode of the power source 5 after passing through the electromagnetic brake 4.

[0037] In one embodiment, the controller 2 is provided with a drive motor port 24, and the drive motor port 24 is connected to the drive motor 3. The power supply 5 supplies power to the controller 2, and the controller 2 can supply power to the drive motor 3 through the drive motor port 24 to control the drive motor 3.

[0038] An electric vehicle includes the above-mentioned steep slope descent control system with electromagnetic brakes. When the electric vehicle adopts the steep slope descent control system, the electromagnetic brake 4 is in an open state when going downhill, which can not only slowly go downhill, but also avoid the electromagnetic brake 4 from closing instantly to bring a large impact force to the vehicle wheels, keyways and other parts, so as to better protect the vehicle and increase the service life of the vehicle. The vehicle includes but is not limited to the following categories: passenger vehicles, freight vehicles, sightseeing vehicles, forklifts, sweepers, scrubbers, tractors and other types of vehicles.

[0039] A method for slow descent on a steep slope of an electric vehicle, comprising the following steps: when braking is required for downhill driving, closing a steep slope descent switch 6 and / or pressing an accelerator 1.

[0040] Specifically, the electric vehicle with a steep slope descent control system is used, and the steep slope descent control methods include the following:

[0041] The first method is to release the accelerator 1 when going downhill and close the steep slope descent switch 6. The power supply 5 supplies power to the reverse signal port 22, and the reverse signal port 22 sends a negative electric signal to the controller 2, the vehicle switches to the reverse gear, and the controller 2 controls the drive motor 3 to rotate in the reverse direction. At the same time, the power supply 5 supplies power to the electromagnetic brake 4, and the electromagnetic brake 4 is powered on. Under the action of gravity, the vehicle goes downhill, and the drive motor 3 rotates in the reverse direction to generate resistance, so as to achieve slow descent.

[0042] The second method is that when the vehicle is going downhill and a vehicle is coming uphill, if the vehicle needs to stop or reverse, the steep slope descent control switch 6 is closed, and the vehicle goes downhill slowly. The accelerator 1 is pressed down at the same time or later when the steep slope descent control switch 6 is closed. The accelerator 1 sends an acceleration signal to the controller 2, and the controller 2 also receives a negative electric signal from the reverse signal port 22, and the drive motor 3 is switched to the reverse gear. The controller 2 controls the drive motor 3 to rotate in the reverse direction, and the vehicle is stopped or reversed uphill at this time, which greatly improves the safety of the vehicle going downhill.

[0043] The third method is that when the vehicle is going downhill and a vehicle going uphill is coming in the opposite direction, and the vehicle needs to stop at this time, the steep slope descent switch 6 is closed, and the vehicle goes downhill slowly. When the steep slope descent switch 6 is closed or the emergency stop button of the vehicle is pressed later, the vehicle can be quickly stopped. Because the steep slope descent switch 6 can be used to slowly get off the vehicle, the emergency stop button is pressed on the premise of closing the steep slope descent switch 6, which will not bring too much impact to the wheels, keyways and other parts of the vehicle, thus better protecting the vehicle and improving the safety of the vehicle going downhill.

[0044] The fourth type is that when the vehicle is going downhill, the accelerator 1 is pressed to go downhill at a higher speed. When it is necessary to stop slowly, the steep slope descent switch 6 can also be closed to achieve the vehicle's slow descent. When going downhill, due to the component of gravity, the wheels rotate to generate electricity, and the drive motor 3 rotates in the opposite direction to generate an upward braking force. The faster the motor rotates, the greater its braking force, so the vehicle can maintain a constant speed or a slow descent. The speed cannot change suddenly, there will be a process, and the corresponding increase in braking force will also have a process, and there will be no locking emergency braking. Therefore, even when going downhill, pressing the accelerator 1 to increase the downhill speed and closing the steep slope descent switch 6 can also achieve slow descent.

[0045] The main advantage of using the steep slope descent system of the present application is that it can achieve slow descent when going downhill. When driving on a flat road, the power supply 5 supplies power to the controller 2, the accelerator 1 is stepped on, the electromagnetic brake 4 is powered on, and the drive motor 3 starts to drive the vehicle. When braking is needed, the accelerator 1 is released, the electromagnetic brake 4 is powered off and closed, so that the drive motor 3 stops rotating and brakes. The designed diode realizes that when the vehicle is driving on a flat road, the electromagnetic brake 4 is controlled by the controller 2. After closing the steep slope descent switch 6, the power supply 5 directly supplies power to the electromagnetic brake 4, but under the unidirectional conduction of the diode, the power supply 5 is prevented from supplying power to the electromagnetic brake port 23 of the controller 2 to affect the function of the controller 2.

[0046] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. A steep slope descent control system with electromagnetic brakes, characterized in that: include: Accelerator, controller, drive motor, electromagnetic brake, power supply and steep slope descent switch; The accelerator is connected to the controller and is used to send an acceleration signal to the controller; The power supply is connected to the controller and the electromagnetic brake respectively, and is used to supply power to the controller and the electromagnetic brake respectively, and the steep slope descent switch is arranged between the power supply and the electromagnetic brake; The controller is connected to the drive motor and the electromagnetic brake, and is used to receive the acceleration signal of the accelerator and conduct current to the drive motor and the electromagnetic brake respectively. The controller is also used to control the rotation and rotation direction of the drive motor; the drive motor is connected to the electromagnetic brake; A reversing signal port is provided on the controller, and the power supply is also connected to the reversing signal port. The power supply is used to supply power to the reversing signal port, and the reversing signal port is used to send a negative electrical signal to the controller; the steep slope descent switch is used to control the current conduction of the power supply to the reversing signal port and the electromagnetic brake respectively.

2. The steep slope descent control system with electromagnetic brake according to claim 1, characterized in that: The reversing signal port and the steep slope descent switch are connected via a reversing signal line. The reversing signal line has a unidirectional current flow direction. The current flow direction on the reversing signal line is from the steep slope descent switch to the reversing signal port.

3. The steep slope descent control system with electromagnetic brake according to claim 1, characterized in that: The controller is provided with a power port, and the power source is connected to the controller via the power port.

4. The steep slope descent control system with electromagnetic brake according to claim 1, characterized in that: The controller is provided with an electromagnetic brake port, and the electromagnetic brake port is connected to the electromagnetic brake.

5. The steep slope descent control system with electromagnetic brake according to claim 4, characterized in that: There is a unidirectional current flow between the controller and the electromagnetic brake, and the current flows from the electromagnetic brake port to the electromagnetic brake.

6. The steep slope descent control system with electromagnetic brake according to claim 5, characterized in that: A diode is arranged between the electromagnetic brake port and the electromagnetic brake, and the diode is used to realize the unidirectional current flow.

7. The steep slope descent control system with electromagnetic brake according to claim 5, characterized in that: The electromagnetic brake port and the electromagnetic brake are connected via a first power line and a second power line, and a first diode and a second diode are respectively disposed on the first power line and the second power line.

8. The steep slope descent control system with electromagnetic brake according to claim 1, characterized in that: The controller is provided with a driving motor port, and the driving motor port is connected to the driving motor.

9. An electric vehicle, characterized in that: It comprises a steep slope descent control system with electromagnetic brakes as claimed in any one of claims 1 to 8.

10. A method for slowing down a steep slope of an electric vehicle, characterized in that: Using the electric vehicle described in claim 9, the method steps are: when braking is required when going downhill, closing the steep slope descent switch and / or pressing the accelerator.

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