CN102407781A - Power supply method and device for electric vehicle with energy-saving function - Google Patents
Power supply method and device for electric vehicle with energy-saving function Download PDFInfo
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- CN102407781A CN102407781A CN2010102931620A CN201010293162A CN102407781A CN 102407781 A CN102407781 A CN 102407781A CN 2010102931620 A CN2010102931620 A CN 2010102931620A CN 201010293162 A CN201010293162 A CN 201010293162A CN 102407781 A CN102407781 A CN 102407781A
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Abstract
The invention discloses a power supply method for an electric vehicle with an energy-saving function. The method comprises the following steps of: (a) detecting the speed of the electric vehicle; (b) detecting a plurality of partition time points of wheels of the electric vehicle in a rotation period; and (c) when the condition that the speed reaches at least one speed threshold value is determined, converting constant electric power of a power supply of the electric vehicle into intermittent conversion electric power according to the partition time points, and supplying to a drive controller of the electric vehicle. The method has the advantages that: according to different speed threshold values of the speed, power supply in different degrees is generated, so that the aim of throttling is fulfilled, and the effect of energy conservation is achieved.
Description
Technical Field
The present invention relates to a power supply method and device for an electric vehicle, and more particularly, to a power supply method and device for an electric vehicle with power saving function.
Background
Referring to fig. 1, a conventional Electric vehicle 900 includes a power source 91, a driving controller 92, an Electric motor 93, a transmission 94, a wheel set 95 and a control device 96.
Generally, the control device 96 for user operation has a throttle 961 and a brake 962, which respectively generate an acceleration command 901 or a deceleration command 902 to the driving controller 92 when the user steps on respectively. The driving controller 92 receives a constant power 903 (as shown in fig. 2) from the power source 91, generates different driving signals 904 to the electric motor 93 according to the acceleration command 901 or the deceleration command 902, and enables the electric motor 93 to generate a driving force to the transmission device 94 (e.g., a transmission case composed of multiple gears) according to the driving signals 904, and then the transmission device 94 can transmit the driving force and drive the wheel set 95 to rotate.
In terms of the energy saving function of the electric vehicle 900, currently, a driving control method for the electric motor 93 is often improved, and there is no technology for improving a power supply method for the electric vehicle 900.
Referring to fig. 2, taking the case where the speed of the electric vehicle 900 is increasing, the constant power 903 generated by the power source 91 of the electric vehicle 900 is a constant value that is output without interruption regardless of the low speed, the medium speed, the second speed, or the high speed, and there is clearly room for improvement in terms of power supply technology from the viewpoint of throttling.
Disclosure of Invention
The invention aims to provide a power supply method and a power supply device for an electric vehicle with a power saving function.
Therefore, the power supply method of the electric vehicle with the power saving function of the invention comprises the following steps: (a) detecting a vehicle speed of the electric vehicle; (b) detecting a plurality of separated time points of a rotation period of wheels of the electric vehicle; and (c) when the vehicle speed reaches at least one speed threshold value, converting the constant power of the power supply of the electric vehicle into intermittent converted power to be supplied to the drive controller of the electric vehicle according to the separation time point.
The invention relates to a power supply device of an electric vehicle with a power-saving function, wherein the electric vehicle comprises a power supply for generating constant power, a driving controller for receiving the constant power and generating a driving signal, an electric motor for generating a driving force according to the driving signal, a transmission device for transmitting the driving force, and at least one wheel driven by the driving force.
The power supply device comprises a speed detector, a time-sharing detector and a power supply controller; the speed detector detects the speed of the electric vehicle; the time-sharing detector detects a plurality of separated time points of a rotation period of the wheel; the power supply controller is electrically connected between the power supply and the driving controller, and is electrically connected with the speed detector to receive the vehicle speed, and is electrically connected with the time-sharing detector to obtain the separation time point, and when the vehicle speed is judged to reach at least one speed threshold value, the constant power of the power supply is converted into intermittent conversion power to be supplied to the driving controller.
The power supply method and the device of the electric vehicle with the power-saving function have the advantages that: different degrees of power supply are generated according to different speed thresholds reached by the vehicle speed, and the purposes of throttling and energy saving are achieved.
Drawings
FIG. 1 is a schematic system diagram illustrating the components of a prior art electric vehicle;
FIG. 2 is a waveform timing diagram illustrating a conventional electric vehicle supplying constant power regardless of high and low speeds;
FIG. 3 is a system diagram illustrating a preferred embodiment of the electric vehicle and power supply apparatus with power saving function according to the present invention;
FIG. 4 is a schematic view illustrating the time-of-use detector being mounted on a wheel;
FIG. 5 is a schematic diagram illustrating the time-sharing detector being disposed on the transmission device;
FIG. 6 is a schematic diagram illustrating the time-sharing detector being disposed on the electric motor;
FIG. 7 is a waveform timing diagram illustrating the generation of the converted power with different density levels according to different speed thresholds in the preferred embodiment; and
fig. 8 is a flowchart illustrating a power supply method for an electric vehicle with power saving function according to the present invention.
FIG. 9 is a system diagram illustrating another preferred embodiment of the electric vehicle with power saving function and the power supply device according to the present invention;
FIG. 10 is a waveform timing diagram illustrating the observation of time periods by a driving signal in the preferred embodiment.
Detailed Description
The invention is described in detail below with reference to the following figures and examples:
before the present invention is described in detail, it is noted that like elements are denoted by the same reference numerals in the following description.
Referring to fig. 3, in a first preferred embodiment of the present invention, an electric vehicle 100 with power saving function includes a power source 11, a power supply device 2, a driving controller 12, an electric motor 13, a transmission device 14, a wheel set 15 and an operation device 16. Wherein,
the power source 11 is a storage battery for generating a constant power 201 for the power supply device 2, wherein the constant power 201 is a constant current in the embodiment; the power supply device 2 is responsible for converting the constant power 201 into converted power 202 (as the amount of power used in fig. 7, the principle of the converted power will be described later) that is supplied to the drive controller 12.
The control device 16 has an accelerator 161 and a brake 162, and when the user steps on the accelerator and the brake respectively, the control device can generate an acceleration command 101 or a deceleration command 102 to the driving controller 12 respectively to control the speed of the vehicle; the driving controller 12 receives the converted power 202 supplied by the power supply device 2 and generates a driving signal 203 to the electric motor 13; then, the electric motor 13 generates a driving force according to the driving signal 203, and the transmission device 14 (e.g., a transmission case having a chain, a belt, a rotating shaft, or a gear) can transmit the driving force to the wheel set 15, so that the wheel set 15 is driven by the driving force to generate a rotational displacement.
In the preferred embodiment, the power supply device 2 includes a power controller 20, a speed detector 21 and a time-sharing detector 22; and the power supply device 2 can integrate each component into a system chip, a package component or a detection system.
The speed detector 21 receives the speed signal 301 to detect the speed of the electric vehicle 100, and the speed detector 21 is disposed on the transmission device 14. since the transmission device 14 is a transmission case composed of chains, belts, shafts or gears, the speed signal 301 representing the speed change can be obtained only by being mounted on the output shaft of the transmission case.
Referring to fig. 4 to 6 and fig. 3, the time-sharing detector 22 has three embodiments, mainly for detecting a plurality of separated time points T divided by a rotation period Δ T of the wheel set 151～t8(see fig. 7).
Referring to fig. 4, in a first embodiment, a plurality of marks 31 are spaced on a wheel 151, for example, eight marks 31 are provided, a detector 32 is provided at a fixed position on a vehicle body, when the wheel 151 rotates, the detector 32 generates a square-wave-like detection signal 302 every time the mark 31 is detected, and a positive edge (or a negative edge) of each trigger represents a separation time t shown in fig. 71～t8The power supply controller 20 sets the divided time t of the converted power1～t8The basis of (1).
Referring to fig. 5, in the second embodiment, a plurality of marks 31 ' are spaced apart from each other on the rotating shaft 141 of the transmission 14, for example, eight marks 31 ' are provided, then a detector 32 ' is provided at a fixed position of the vehicle body, when the rotating shaft 141 rotates, the detector 32 ' detects different marks 31 ' to generate a square-wave-like detection signal 302, and a positive edge (or a negative edge) of each trigger represents a separation time t shown in fig. 71～t8The power supply controller 20 sets the divided time t of the converted power1～t8The basis of (1).
Referring to fig. 6, in the second embodiment, a plurality of marks 31 "are alternately arranged on the driving shaft 131 of the electric motor 13, for example, eight marks 31" are arranged, then a detector 32 "is arranged at a fixed position of the electric motor 13, when the rotating shaft 131 rotates, the detector 32" detects different marks 31 "to generate a square-wave-like detection signal 302, and the positive edge (or negative edge) of each trigger represents the separated time t shown in fig. 71～t8The power supply controller 20 sets the divided time t of the converted power1～t8The basis of (1).
Referring again to FIG. 3, the power controller 20 supplies powerThe power source 11 and the driving controller 12 are electrically connected, and the speed detector 21 is electrically connected to receive a speed signal 301 and the time-sharing detector 22 is electrically connected to obtain the time t with the separation1～t8After the time division signal 302 of the information, when it is judged that the vehicle speed reaches at least a speed threshold, the constant power 201 of the power supply is converted into intermittent converted power 202 and supplied to the drive controller 12.
Referring to fig. 7 and fig. 3, in the preferred embodiment, a plurality of speed thresholds are set inside the power controller 20, and the power consumption with different density degrees is mainly generated according to different speed thresholds, that is, the converted power 202 includes a constant power 501, a denser converted power 502, a thinner converted power 503, and the like, and the converted power is mainly generated as the denser converted power 502 when the speed threshold is determined to be lower, and the converted power is generated as the thinner converted power 503 when the speed threshold is determined to be higher.
Referring to fig. 8 and fig. 3, the power supply method of the electric vehicle 100 with the power saving function of the present invention includes the following steps: detecting a vehicle speed of the electric vehicle 100 (step 601); detecting a plurality of separated time points of a rotation period of the wheel 151 (step 602); determine if the vehicle speed reaches a speed threshold (step 603)? The embodiment has three power supply situations, namely, the constant power is output when the speed threshold is not reached (step 604) (step 605); when the first speed threshold value is not less than the first speed threshold value (step 606), dense intermittent conversion power is output (step 607); and the second speed threshold or more (step 608), comparatively sparse discontinuous conversion power is output (step 609).
Referring to fig. 7, comparing the second speed and the third speed, it can be seen that when the second speed with a lower speed threshold is reached, the denser converted power 502 is generated correspondingly, and when the third speed with a higher speed threshold is reached, the thinner converted power 503 is generated correspondingly. In addition, the above steps 607 and 609 are based on the separation time t1～t8The constant power 201 is converted into intermittent converted power 202 to be supplied to the electric vehicle 100.
In step 604, the power controller 20 determines that the constant power 501 is output when the vehicle speed reaches a first speed due to the start stage according to the vehicle speed signal 301.
In step 606, when the vehicle speed reaches a second speed higher than the first speed and the second speed reaches a first threshold (e.g., 20 km/h), the time t is determined according to the separation time1～t8The original constant power 501 is converted into intermittent converted power 502 to be supplied to the drive controller 12, in this example, at a single time t1、t3、t5、t7Time t of not outputting but doubling2、t4、t6、t8And outputting the pulse signal.
In step 608, when the vehicle speed reaches a third speed higher than the second speed and the third speed reaches a higher second threshold (e.g., 40 km/h), the time t is determined according to the separation1～t8The original constant power 501 is converted into intermittent converted power 502 to be supplied to the drive controller 12 at the time t1、t4、t7Output pulse signal, and time t2、t3、t5、t6、t8No pulse signal is output.
Referring to fig. 9 and 10, a second embodiment of the electric vehicle 100' of the present invention is substantially the same as the components of fig. 3, and includes a power source 11 for generating constant power, a driving controller 12 for receiving the constant power to generate a driving signal 203, an electric motor 13 for generating a driving force according to the driving signal 203, a transmission 14 for transmitting the driving force, wheels 151 driven by the driving force, a speed detector 21, and a power controller 20.
In contrast, the power supply apparatus 2' of the present embodiment includes a detection line 303 connected between the driving controller 12 and the electric motor 13 and the power controller 20, i.e. the detection line 303 is used instead of the time-sharing detector 22 (as shown in fig. 3) in the first embodiment.
The power controller 20 detects the input current waveform of the electric motor 13 by the driving signal 203 obtained by the detection line 303, and then obtains the time period Δ T of one rotation of the electric motor 13; the technical principle is that the electric vehicle 100' will continue to move due to inertia when the power supply is interrupted, and as long as the electric motor 13 is rotating, the driving signal 203 will continuously have a periodic waveform due to the magnetic-electric generation phenomenon, so that the driving signal 203 between the driving controller 12 and the electric motor 13 is detected, and the time period Δ T of one rotation of the electric motor 13 can be observed.
Therefore, the second embodiment of the present invention does not need to divide n times, but only needs two high points in the waveform of the driving signal 203 to obtain the time period Δ T, i.e. the time period Δ T is extracted from the input current waveform of the electric motor 13, and then the proportion of the intermittent power-off is determined by the actual data of the vehicle speed or the rotation speed of the electric motor 13.
For example, when the first speed threshold value (such as 20 km/h) is higher, the dense intermittent conversion power is output, and the proportion of intermittent outage is defined as 10101010, namely, 1/2 of power supply is provided; when the vehicle speed is higher than the second speed threshold (e.g. 40 km/h), the proportion of intermittent power-off is defined as 10001000, i.e. 1/4 of power supply is provided, and the effect of saving power can also be achieved.
In summary, the power supply method and the power supply apparatus 2 of the electric vehicle 100 with the power saving function according to the present invention have the following effects: the power supply device 2 generates power supply in different degrees according to different speed thresholds reached by the vehicle speed, so that the effects of throttling and energy saving of the invention can be really achieved.
Claims (10)
1. A power supply method of an electric vehicle with electricity-saving function, the electric vehicle includes a power supply generating a constant power, a driving controller receiving the constant power and generating a driving signal, an electric motor generating a driving force according to the driving signal, a transmission device transmitting the driving force, and at least one wheel driven by the driving force; the method is characterized in that: the method comprises the following steps:
(a) detecting a vehicle speed of the electric vehicle;
(b) detecting a plurality of separated time points of a rotation period of wheels of the electric vehicle; and
(c) and when the speed of the electric vehicle reaches at least one speed threshold value, converting the constant power of the power supply of the electric vehicle into intermittent converted power to be supplied to a drive controller of the electric vehicle according to the separation time point.
2. The power supply method of an electric vehicle with a power saving function according to claim 1, characterized in that: and (c) setting a plurality of speed thresholds, and generating the converted electric power with different densities according to different speed thresholds reached by the vehicle speed.
3. The power supply method of an electric vehicle with a power saving function according to claim 2, characterized in that: and (c) converting into dense conversion power when the speed threshold value reached by the vehicle speed is judged to be low, and converting into sparse conversion power when the speed threshold value reached by the vehicle speed is judged to be high.
4. A kind of power supply unit with electricity-saving function of motor vehicle, the motor vehicle includes a power which produces a invariable electric power, a drive controller which receives the invariable electric power and produces a driving signal, an electric motor which produces a driving force according to the driving signal, a transmission device which transmits the driving force, and at least a wheel driven by the driving force, characterized in that: the power supply device includes:
a speed detector for detecting a speed of the electric vehicle;
a time-sharing detector for detecting a plurality of separated time points of a rotation period of the wheel; and
and the power supply controller is electrically connected between the power supply and the driving controller, is electrically connected with the speed detector to receive the vehicle speed, is electrically connected with the time-sharing detector to obtain the separation time point, and converts the constant power of the power supply into intermittent conversion power to be supplied to the driving controller when judging that the vehicle speed reaches at least one speed threshold value.
5. The power supply apparatus for an electric vehicle with a power saving function according to claim 4, characterized in that: the time-sharing detector is arranged on the electric motor, the transmission device or the wheel.
6. The power supply apparatus for an electric vehicle with a power saving function according to claim 4 or 5, characterized in that: the power distribution controller is provided with a plurality of speed threshold values, and converted power with different densities is generated according to different speed threshold values reached by the vehicle speed.
7. The power supply apparatus for an electric vehicle with a power saving function according to claim 6, characterized in that: and the power distribution controller converts the converted power into dense converted power when judging that the speed threshold value reached by the vehicle speed is lower and converts the converted power into sparse converted power when judging that the speed threshold value reached by the vehicle speed is higher.
8. A kind of power supply unit of motor vehicle with electricity-saving function, the motor vehicle includes a power which produces a invariable electric power, a drive controller which receives the invariable electric power and produces a driving signal, an electric motor which produces a driving force according to the driving signal, a transmission which transmits the driving force, at least a wheel driven by the driving force, and a speed detector which detects the speed of the vehicle, its characteristic lies in: the power supply device includes:
a detection line connected between the drive controller and the electric motor; and
and the power supply controller is electrically connected between the power supply and the driving controller, is electrically connected with the detection line to receive the driving signal, determines the time period of one rotation of the electric motor by detecting two high points of the periodic input current waveform of the electric motor due to the magnetic electrification phenomenon through the driving signal, and then determines the proportion of intermittent outage by using the actual data of the speed or the rotating speed of the electric motor.
9. The power supply apparatus for an electric vehicle with a power saving function according to claim 7, characterized in that: the power distribution controller is provided with a plurality of speed threshold values, and converted power with different densities is generated according to different speed threshold values reached by the vehicle speed.
10. The power supply apparatus for an electric vehicle with a power saving function according to claim 8, characterized in that: and the power distribution controller converts the converted power into dense converted power when judging that the speed threshold value reached by the vehicle speed is lower and converts the converted power into sparse converted power when judging that the speed threshold value reached by the vehicle speed is higher.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102931620A CN102407781A (en) | 2010-09-20 | 2010-09-20 | Power supply method and device for electric vehicle with energy-saving function |
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| CN2010102931620A CN102407781A (en) | 2010-09-20 | 2010-09-20 | Power supply method and device for electric vehicle with energy-saving function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311129A (en) * | 2000-03-01 | 2001-09-05 | 本田技研工业株式会社 | Electric bicycle |
| JP2004048844A (en) * | 2002-07-09 | 2004-02-12 | Toyota Motor Corp | Apparatus and method for controlling vehicle, program for realizing method, and recording medium for recording its program |
| CN1567698A (en) * | 2003-06-17 | 2005-01-19 | 旺玖科技股份有限公司 | Motor-drive circuit having frequency setting and correcting function and method thereof |
| CN1635702A (en) * | 2003-12-30 | 2005-07-06 | 上海贝岭股份有限公司 | A brushless motor controller having overload switching and adjusting function |
| US20070290650A1 (en) * | 2004-12-28 | 2007-12-20 | Koichiro Muta | Motor Control Unit And Vehicle Equipped Therewith |
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2010
- 2010-09-20 CN CN2010102931620A patent/CN102407781A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311129A (en) * | 2000-03-01 | 2001-09-05 | 本田技研工业株式会社 | Electric bicycle |
| JP2004048844A (en) * | 2002-07-09 | 2004-02-12 | Toyota Motor Corp | Apparatus and method for controlling vehicle, program for realizing method, and recording medium for recording its program |
| CN1567698A (en) * | 2003-06-17 | 2005-01-19 | 旺玖科技股份有限公司 | Motor-drive circuit having frequency setting and correcting function and method thereof |
| CN1635702A (en) * | 2003-12-30 | 2005-07-06 | 上海贝岭股份有限公司 | A brushless motor controller having overload switching and adjusting function |
| US20070290650A1 (en) * | 2004-12-28 | 2007-12-20 | Koichiro Muta | Motor Control Unit And Vehicle Equipped Therewith |
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