JPH06253408A - Motor control system for electric motor vehicle - Google Patents
Motor control system for electric motor vehicleInfo
- Publication number
- JPH06253408A JPH06253408A JP5038698A JP3869893A JPH06253408A JP H06253408 A JPH06253408 A JP H06253408A JP 5038698 A JP5038698 A JP 5038698A JP 3869893 A JP3869893 A JP 3869893A JP H06253408 A JPH06253408 A JP H06253408A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- voltage
- output
- current
- storage battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Control Of Ac Motors In General (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直流電源の直流を交流
に変換する電力変換装置を備えた電気自動車のモーター
制御システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor control system for an electric vehicle equipped with a power converter for converting direct current from a direct current power source into alternating current.
【０００２】[0002]
【従来の技術とその課題】近年、地球環境の破壊に対す
る関心が高まる中で、直流電源の出力を交流に変換し
て、この交流出力を車輪の駆動用モーターに供給する、
いわゆるソーラーカー（主として太陽エネルギーを太陽
電池により電気エネルギーに変換した出力を利用して、
モータ等の回転力で走行する太陽電池式自動車）などの
電気自動車の開発が盛んに行われている。2. Description of the Related Art In recent years, amid growing concern about the destruction of the global environment, the output of a DC power supply is converted into AC, and this AC output is supplied to a wheel drive motor.
So-called solar cars (mainly using the output of solar energy converted to electrical energy by solar cells,
2. Description of the Related Art Development of electric vehicles such as a solar cell type vehicle that runs with the rotational force of a motor etc.) has been actively conducted.
【０００３】従来、この種の電気自動車では、蓄電池等
の直流電源からの出力を交流に変換する電力変換装置等
を含む制御回路を介して車輪駆動用のモーターへ供給す
るようにしているが、一般にこの制御回路では運転者の
アクセル指令にほぼ比例した電流をモーターへ出力する
ように構成されている。Conventionally, in this type of electric vehicle, the output from a direct current power source such as a storage battery is supplied to a wheel driving motor through a control circuit including a power conversion device for converting the output into an alternating current. Generally, this control circuit is configured to output a current to the motor, which is almost proportional to the accelerator command from the driver.
【０００４】しかしながら、モーターの回転数が高くな
るにしたがって、モーターの誘起電圧のピーク値と蓄電
池の端子電圧との差が次第に小さくなり、さらにモータ
ーへ過大電流を流すようなアクセル操作をした場合、図
５に示すように、アクセルの操作量に応じたモーターへ
の指示波形Ａ（正弦波形）に対して、実波形Ｒは正弦波
形ではないピークが偏平となった乱れた波形となる。However, as the rotational speed of the motor increases, the difference between the peak value of the induced voltage of the motor and the terminal voltage of the storage battery gradually decreases, and when an accelerator operation is performed so that an excessive current flows to the motor, As shown in FIG. 5, the actual waveform R is not a sinusoidal waveform but a distorted waveform in which the peak is flat with respect to the instructional waveform A (sine waveform) to the motor according to the operation amount of the accelerator.
【０００５】したがって、制御回路からモーターへの出
力電流が大であるにもかかわらず、モーターのトルクが
小さいままとなり、その結果エネルギー効率の低い運転
が続けられることになる。特にソーラーカーのように使
用可能な電力が少ない電気自動車では、このような場合
に消費電力の無駄使いとなるので深刻な問題となってい
る。Therefore, although the output current from the control circuit to the motor is large, the torque of the motor remains small, and as a result, the operation with low energy efficiency is continued. In particular, in an electric vehicle such as a solar car that has a small amount of usable electric power, power consumption is wasted in such a case, which is a serious problem.
【０００６】[0006]
【発明の目的】そこで、本発明は上述の問題点に鑑み案
出されたものであって、使用可能な電力が非常に限られ
た電気自動車に好適なモーター制御システムを提供する
ことを目的とする。SUMMARY OF THE INVENTION Therefore, the present invention has been devised in view of the above problems, and an object of the present invention is to provide a motor control system suitable for an electric vehicle whose usable power is very limited. To do.
【０００７】[0007]
【課題を解決するための手段】上述の目的を達成する電
気自動車のモーター制御システムは、蓄電池からの直流
を交流に変換して、この交流を車輪駆動用のモーターへ
供給するものであって、蓄電池の端子電圧とモーターの
誘起電圧との電圧差の絶対値Ｖ１と、アクセルの操作量
に応じたモーターの駆動電流とモーター巻線の抵抗とか
ら算出される発生電圧の絶対値Ｖ２とを算出し、少なく
ともＶ１＞Ｖ２の場合はモーターの駆動電流を、Ｖ１＜
Ｖ２の場合は正弦波形の最大電流をモーター巻線へ流す
ように制御することを特徴とする。A motor control system for an electric vehicle that achieves the above object converts a direct current from a storage battery into an alternating current and supplies the alternating current to a motor for driving wheels. The absolute value V1 of the voltage difference between the terminal voltage of the storage battery and the induced voltage of the motor, and the absolute value V2 of the generated voltage calculated from the drive current of the motor and the resistance of the motor winding according to the operation amount of the accelerator are calculated. If at least V1> V2, the drive current of the motor is V1 <
In the case of V2, it is characterized in that the maximum current of sine waveform is controlled to flow to the motor winding.
【０００８】[0008]
【実施例】本発明に係る実施例を図面に基づいて詳細に
説明する。図１に示すように、本実施例のモーター制御
システムは、蓄電池Ｂからの直流出力を制御回路（制御
手段）Ｃで交流に変換して、その出力を車輪駆動用のモ
ーターＭに供給するように制御するものである。Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the motor control system of this embodiment converts a DC output from a storage battery B into an AC by a control circuit (control means) C, and supplies the output to a wheel driving motor M. To control.
【０００９】ここで、制御回路Ｃは以下のような手段か
ら構成される。すなわち、蓄電池Ｂの出力端とモーター
Ｍとの間には、インバータを含む出力手段１が設けら
れ、モーターＭと出力手段１との間には、モーターＭの
巻線端子部における電流を検出する電流検出手段２が設
けられている。Here, the control circuit C is composed of the following means. That is, the output means 1 including an inverter is provided between the output end of the storage battery B and the motor M, and the current in the winding terminal portion of the motor M is detected between the motor M and the output means 1. A current detecting means 2 is provided.
【００１０】また、蓄電池Ｂの出力端には電圧検出手段
３が、モーターＭの出力端にはモーターＭの回転数を検
出する回転数検出手段４が、アクセルペダルにはアクセ
ル操作量を検出するアクセル検出手段５がそれぞれ設け
られている。Further, a voltage detecting means 3 is provided at the output end of the storage battery B, a rotation speed detecting means 4 is provided at the output end of the motor M to detect the rotation speed of the motor M, and an accelerator operation amount is detected at the accelerator pedal. Accelerator detection means 5 are provided respectively.
【００１１】さらに、電圧検出手段３の出力端には、蓄
電池Ｂの端子電圧とモーターＭの誘起電圧との電圧差の
絶対値Ｖ１（以下、余裕電圧という）を算出する余裕電
圧算出手段６が接続され、回転数検出手段４と余裕電圧
算出手段６との間には、モーターＭの誘起電圧を算出す
る誘起電圧算出手段７が接続され、アクセル検出手段５
にはアクセル操作量に応じてモーターＭの駆動電流を算
出する駆動電流算出手段８が接続され、この駆動電流算
出手段８にはモーターＭの発生電圧の絶対値Ｖ２（以
下、発生電圧という）を算出する発生電圧算出手段９が
接続されている。そして、余裕電圧算出手段６の出力と
発生電圧算出手段９の出力とは、比較手段１０に出力さ
れ、その結果を出力手段１に出力するように構成されて
いる。Further, at the output end of the voltage detecting means 3, there is a margin voltage calculating means 6 for calculating an absolute value V1 (hereinafter referred to as margin voltage) of a voltage difference between the terminal voltage of the storage battery B and the induced voltage of the motor M. An induced voltage calculation means 7 for calculating the induced voltage of the motor M is connected between the rotational speed detection means 4 and the margin voltage calculation means 6, and the accelerator detection means 5 is connected.
A drive current calculation means 8 for calculating a drive current of the motor M according to the accelerator operation amount is connected to the drive current calculation means 8, and an absolute value V2 (hereinafter referred to as a generated voltage) of a generated voltage of the motor M is connected to the drive current calculation means 8. The generated voltage calculating means 9 for calculating is connected. The output of the margin voltage calculating means 6 and the output of the generated voltage calculating means 9 are output to the comparing means 10, and the result is output to the output means 1.
【００１２】ここで、比較手段１０は、余裕電圧Ｖ１と
発生電圧Ｖ２とがＶ１＞Ｖ２である場合は、出力手段１
からモーターＭの巻線へアクセル操作量に応じた駆動電
流を出力するように信号出力する。また、Ｖ１≦Ｖ２の
場合は、出力手段１からモーターＭの巻線へ蓄電池Ｂか
ら変換可能な最大の電圧波形に応じた電流を出力するよ
うに信号出力する。The comparison means 10 outputs the output means 1 when the margin voltage V1 and the generated voltage V2 are V1> V2.
Outputs a signal to the winding of the motor M so as to output a drive current according to the accelerator operation amount. When V1 ≦ V2, a signal is output from the output means 1 to the winding of the motor M so as to output a current corresponding to the maximum voltage waveform convertible from the storage battery B.
【００１３】次に、上記構成のモーター制御システムの
作動について説明する。アクセル操作量が小さいか適正
の場合、比較手段１０で比較される余裕電圧Ｖ１と発生
電圧Ｖ２とはＶ１＞Ｖ２となる。すなわち、図２に示す
ように、蓄電池Ｂから変換可能な最大の電圧波形はＳ
１、モーターＭの誘起電圧波形はＳ３で表され、Ｖ１は
図に示すように任意時点におけるＳ１とＳ３との差で示
される。これに対し、Ｓ３にアクセル操作量に応じた電
流を流すための電圧Ｖ２を上乗せした電圧波形はＳ２で
あり、電圧が０の場合を除いてＳ１＜Ｓ２となり、出力
手段１からモーターＭの巻線にはアクセル操作量に応じ
た駆動電流を出力することができる。Next, the operation of the motor control system having the above structure will be described. When the accelerator operation amount is small or appropriate, the margin voltage V1 and the generated voltage V2 compared by the comparison means 10 are V1> V2. That is, as shown in FIG. 2, the maximum voltage waveform convertible from the storage battery B is S
1. The induced voltage waveform of the motor M is represented by S3, and V1 is represented by the difference between S1 and S3 at an arbitrary time point as shown in the figure. On the other hand, the voltage waveform obtained by adding the voltage V2 for flowing the current corresponding to the accelerator operation amount to S3 is S2, and S1 <S2 except when the voltage is 0, and the output means 1 rotates the motor M. A drive current corresponding to the accelerator operation amount can be output to the line.
【００１４】一方、アクセル操作量が大き過ぎ、比較手
段１０で比較される余裕電圧Ｖ１と発生電圧Ｖ２との関
係はＶ１≦Ｖ２となる。すなわち、図３に示すように、
Ｓ１及びＳ３はアクセル操作量が小さいか適正の場合と
同様であるが、電圧が０の場合を除いてＳ２＞Ｓ１とな
る。ところが、蓄電池Ｂの端子電圧から最大Ｓ１の最大
値しか出力できないので、出力手段１からモーターＭの
巻線にはＳ１に相当する正弦波形の最大電流を出力する
ことができる。On the other hand, the accelerator operation amount is too large, and the relation between the margin voltage V1 and the generated voltage V2 compared by the comparison means 10 is V1≤V2. That is, as shown in FIG.
S1 and S3 are the same as when the accelerator operation amount is small or appropriate, but S2> S1 except when the voltage is 0. However, since only the maximum value of the maximum S1 can be output from the terminal voltage of the storage battery B, the maximum current having a sine waveform corresponding to S1 can be output from the output means 1 to the winding of the motor M.
【００１５】なお、Ｖ１＝Ｖ２の場合、出力手段１から
モーターＭの巻線には、アクセル操作量に応じた駆動電
流を出力するようにしてもよいし、正弦波形の最大電流
を出力するようにしてもよい。When V1 = V2, the output means 1 may output a drive current to the winding of the motor M according to the accelerator operation amount, or may output a maximum current of a sine waveform. You may
【００１６】このように、アクセル操作量が一定以上あ
れば、出力手段１からモーターＭに供給される交流波形
は、アクセル操作量の大小にかかわらず図４におけるＰ
で示される正弦波形となり、従来のような歪な波形
（Ｒ）となることが防止されるので、エネルギー効率の
良好な運転が実現される。As described above, when the accelerator operation amount is equal to or more than a certain value, the AC waveform supplied from the output means 1 to the motor M is P in FIG. 4 regardless of the magnitude of the accelerator operation amount.
The sinusoidal waveform shown by is prevented, and the conventional distorted waveform (R) is prevented, so that the operation with good energy efficiency is realized.
【００１７】[0017]
【発明の効果】本発明のモーター制御システムによれ
ば、運転者のアクセル操作量に応じたトルクを達成する
だけの電流を、車輪駆動用のモーターへ流せられるかど
うかを判定するとともに、この電流が流せないときは、
正弦波形の最大電流をモーターへ流すように制御するの
で、エネルギー効率のきわめて高い運転が可能となり、
特にソーラーカーのように使用可能な電力が制限された
電気自動車で好適なモーター制御システムを提供でき
る。According to the motor control system of the present invention, it is determined whether or not a current sufficient to achieve the torque corresponding to the accelerator operation amount of the driver can be supplied to the wheel driving motor, and the current is determined. If you can't run,
Since the maximum current of sine waveform is controlled to flow to the motor, extremely energy efficient operation is possible,
In particular, it is possible to provide a motor control system suitable for an electric vehicle such as a solar car having a limited usable electric power.
【図１】本発明に係る電気自動車のモーター制御システ
ムを説明するブロック図である。FIG. 1 is a block diagram illustrating a motor control system for an electric vehicle according to the present invention.
【図２】Ｖ１＞Ｖ２の場合の出力手段の電圧波形を示す
図である。FIG. 2 is a diagram showing a voltage waveform of an output means when V1> V2.
【図３】Ｖ１＜Ｖ２の場合の出力手段の電圧波形を示す
図である。FIG. 3 is a diagram showing a voltage waveform of an output means when V1 <V2.
【図４】出力手段の出力波形を示す図である。FIG. 4 is a diagram showing an output waveform of output means.
【図５】従来のモーターへの出力波形を説明する図であ
る。FIG. 5 is a diagram illustrating an output waveform to a conventional motor.
１ ・・・ 出力手段 ２ ・・・ 電
流検出手段 ３ ・・・ 電圧検出手段 ４ ・・・ 回
転数検出手段 ５ ・・・ アクセル検出手段 ６ ・・・ 余
裕電圧算出手段 ７ ・・・ 誘起電圧算出手段 ８ ・・・ 駆
動電流算出手段 ９ ・・・ 発生電圧算出手段 １０ ・・・ 比
較手段 Ｂ ・・・ 蓄電池 Ｍ ・・・ モ
ーター Ｃ ・・・ 制御回路1 ... Output means 2 ... Current detection means 3 ... Voltage detection means 4 ... Rotation speed detection means 5 ... Accelerator detection means 6 ... Margin voltage calculation means 7 ... Induction voltage calculation Means 8 ・ ・ ・ Drive current calculation means 9 ・ ・ ・ Generated voltage calculation means 10 ・ ・ ・ Comparison means B ・ ・ ・ Storage battery M ・ ・ ・ Motor C ・ ・ ・ Control circuit
Claims (1)
の交流を車輪駆動用のモーターへ供給する電気自動車の
モーター制御システムであって、前記蓄電池の端子電圧
と前記モーターの誘起電圧との電圧差の絶対値Ｖ１と、
アクセルの操作量に応じた前記モーターの駆動電流とモ
ーター巻線の抵抗とから算出される発生電圧の絶対値Ｖ
２とを算出し、少なくともＶ１＞Ｖ２の場合は前記モー
ターの駆動電流を、Ｖ１＜Ｖ２の場合は正弦波形の最大
電流を前記モーター巻線へ流すように制御することを特
徴とする電気自動車のモーター制御システム。1. A motor control system for an electric vehicle, which converts direct current from a storage battery into alternating current and supplies the alternating current to a motor for driving wheels, comprising: a terminal voltage of the storage battery and an induced voltage of the motor. Absolute value V1 of voltage difference,
Absolute value V of the generated voltage calculated from the drive current of the motor and the resistance of the motor winding according to the operation amount of the accelerator
2 is calculated, and when at least V1> V2, the drive current of the motor is controlled, and when V1 <V2, a maximum sinusoidal current is controlled to flow to the motor winding. Motor control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038698A JPH06253408A (en) | 1993-02-26 | 1993-02-26 | Motor control system for electric motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038698A JPH06253408A (en) | 1993-02-26 | 1993-02-26 | Motor control system for electric motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06253408A true JPH06253408A (en) | 1994-09-09 |
Family
ID=12532535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5038698A Pending JPH06253408A (en) | 1993-02-26 | 1993-02-26 | Motor control system for electric motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06253408A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120191281A1 (en) * | 2011-01-26 | 2012-07-26 | Jun Saito | Electric vehicle |
-
1993
- 1993-02-26 JP JP5038698A patent/JPH06253408A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120191281A1 (en) * | 2011-01-26 | 2012-07-26 | Jun Saito | Electric vehicle |
| US8768550B2 (en) * | 2011-01-26 | 2014-07-01 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |