JPH0757068B2 - Magnetic torquer drive circuit - Google Patents
Magnetic torquer drive circuitInfo
- Publication number
- JPH0757068B2 JPH0757068B2 JP63017657A JP1765788A JPH0757068B2 JP H0757068 B2 JPH0757068 B2 JP H0757068B2 JP 63017657 A JP63017657 A JP 63017657A JP 1765788 A JP1765788 A JP 1765788A JP H0757068 B2 JPH0757068 B2 JP H0757068B2
- Authority
- JP
- Japan
- Prior art keywords
- transistors
- magnetic torquer
- diodes
- circuit
- transistor
- 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.)
- Expired - Lifetime
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、人工衛星等に搭載される磁気トルカに電流を
供給する磁気トルカ駆動回路に関する。Description: TECHNICAL FIELD The present invention relates to a magnetic torquer drive circuit that supplies a current to a magnetic torquer mounted on an artificial satellite or the like.
（従来の技術） 従来の磁気トルカ駆動回路においては、磁気トルカに流
す電流の向きを切り替えるため、第４図に示すような回
路が採用されていた。即ち、図中の矢印ａの向きに電流
を流す場合には、Tr1及びTr4をオン（導通）にし、Tr2
及びTr3をオフ（遮断）にする。また、図中の矢印ｂの
向きに電流を流す場合には、Tr2及びTr3をオンにし、Tr
1及びTr4をオフにする。(Prior Art) In a conventional magnetic torquer drive circuit, a circuit as shown in FIG. 4 has been adopted in order to switch the direction of the current flowing through the magnetic torquer. That is, when a current flows in the direction of arrow a in the figure, Tr1 and Tr4 are turned on (conduction) and Tr2 is turned on.
And turn off Tr3. If a current is to flow in the direction of arrow b in the figure, turn on Tr2 and Tr3 and turn on Tr.
Turn off 1 and Tr4.
（発明が解決しようとする課題） 上述した従来の駆動回路を用いると、電流を遮断する際
に磁気トルカで逆起電力が発生するから、電磁適合性の
観点から好ましくなかった。また、その逆起電力によ
り、Tr1又はTr3に逆バイアスがかかり回路動作上も好ま
しくなかった。(Problems to be Solved by the Invention) When the above-described conventional drive circuit is used, a counter electromotive force is generated in the magnetic torquer when the current is cut off, which is not preferable from the viewpoint of electromagnetic compatibility. Further, the back electromotive force causes a reverse bias on Tr1 or Tr3, which is not preferable in circuit operation.
（課題を解決するための手段） 前述の課題を解決するために本発明が提供する手段は、
直流電源の出力端子間に同じ極性に直列に接続される第
１及び第２のトランジスタと、前記出力端子間に同じ極
性に接続される第３及び第４のトランジスタとを備えて
なり、前記第１及び第２のトランジスタは前記出力端子
の極性に対し前記第３及び第４のトランジスタとは逆の
極性に当該出力端子に接続されており、前記第１及び第
２のトランジスタの接続点と前記第３及び第４のトラン
ジスタの接続点との間に磁気トルカが接続され前記第１
及び第４のトランジスタが導通にされ前記第２及び第３
のトランジスタが遮断にされる第１の期間と前記第１及
び第４のトランジスタが遮断にされ前記第２及び第３の
トランジスタが導通にされる第２の期間とで互いに逆向
きに駆動電流を前記磁気トルカに供給する磁気トルカ駆
動回路であって、 前記第１乃至第４のトランジスタに並列にそれぞれ接続
されている第１乃至第４のダイオードと、前記出力端子
間に接続されているエネルギ散逸回路とを備えてなり、 前記第１及び第３のダイオードとこれらに対応する前記
第１及び第３のトランジスタとではダイオードのアノー
ド及びカソードがトランジスタのコレクタ及びエミッタ
にそれぞれ接続されており、 前記第２及び第４のダイオードとこれらに対応する前記
第２及び第４のトランジスタとではダイオードのアノー
ド及びカソードがトランジスタのエミッタ及びコレクタ
にそれぞれ接続されており、 前記エルギ散逸回路は、前記第１及び第４のダイオード
又は前記第２及び第３のダイオードを介して加えられる
前記磁気トルカの逆起電力が所定値を越えたときに前記
出力端子間に抵抗器を挿入することを特徴とする。(Means for Solving the Problems) Means provided by the present invention for solving the above-mentioned problems are as follows.
A first and a second transistor connected in series with the same polarity between the output terminals of the DC power supply; and a third and a fourth transistor connected with the same polarity between the output terminals. The first and second transistors are connected to the output terminal in a polarity opposite to that of the third and fourth transistors with respect to the polarity of the output terminal, and the connection point of the first and second transistors and the A magnetic torquer is connected between the connection point of the third and fourth transistors, and
And the fourth transistor is rendered conductive, and the second and third transistors are turned on.
Drive currents in opposite directions during a first period during which the transistor is cut off and a second period during which the first and fourth transistors are cut off and the second and third transistors are turned on. A magnetic torquer drive circuit for supplying to the magnetic torquer, comprising: first to fourth diodes respectively connected in parallel to the first to fourth transistors, and energy dissipation connected between the output terminals. A circuit, the anode and cathode of the diode are respectively connected to the collector and emitter of the transistor in the first and third diodes and the first and third transistors corresponding thereto, respectively. In the second and fourth diodes and the corresponding second and fourth transistors, the anodes and cathodes of the diodes are transistors. And a counter electromotive force of the magnetic torquer applied via the first and fourth diodes or the second and third diodes to the predetermined value. A resistor is inserted between the output terminals when the output voltage exceeds.
（実施例） 次に実施例を挙げ本発明を一層詳しく説明する。(Example) Next, an Example is given and this invention is demonstrated in more detail.
第１図は本発明の一実施例を示す回路図である。この実
施例はトランジスタTr1〜４、ダイオードCR1〜４、エネ
ルギ散逸回路からなり、端子11及び12は直流電源の出力
端子のうちの＋端子及び−端子にそれぞれ接続されてい
る。そして、トランジスタTr1及びTr2の接続点13とトラ
ンジスタTr3及びトランジスタTr4の接続点14との間に磁
トルカ２が接続されている。FIG. 1 is a circuit diagram showing an embodiment of the present invention. This embodiment comprises transistors Tr1 to Tr4, diodes CR1 to CR4, and an energy dissipation circuit, and terminals 11 and 12 are connected to the + and-terminals of the output terminals of the DC power supply, respectively. The magnetic torquer 2 is connected between the connection point 13 of the transistors Tr1 and Tr2 and the connection point 14 of the transistors Tr3 and Tr4.
本発明の磁気トルカ駆動回路は、磁気トルカ２で発生す
る逆起電力を流す回路としてCR1〜４を備え、その逆起
電力のエネルギを散逸させる手段としてエネルギ散逸回
路１を有している。今、Tr1とTr4とがオンの状態であ
り、磁気トルカ２に図に示す（ａ）の向きに電流が流れ
ている場合を考える。この状態でTr1およびTr4をオフに
すると磁気トルカ２に逆起電力が発生し、CR2およびCR3
を通じて電流を流し、電源側に対し逆起電力によるエネ
ルギを還流する。一方、電源側では、逆起電力の還流を
電源電圧の変動などで検出し、エネルギ散逸回路によっ
てそのエネルギを消す。このようなことは第４図の従来
の回路では不可能であったが、本発明の回路では磁気ト
ルカで発生する逆起電力を抑制することができる。The magnetic torquer driving circuit of the present invention includes CR1 to CR4 as circuits for flowing the counter electromotive force generated in the magnetic torquer 2, and the energy dissipation circuit 1 as means for dissipating the energy of the counter electromotive force. Now, let us consider a case where Tr1 and Tr4 are on and a current flows through the magnetic torquer 2 in the direction of (a) shown in the figure. When Tr1 and Tr4 are turned off in this state, a back electromotive force is generated in the magnetic torquer 2 and CR2 and CR3
An electric current is caused to flow through, and the energy due to the counter electromotive force is circulated to the power source side. On the other hand, on the power supply side, the backflow of the counter electromotive force is detected by the fluctuation of the power supply voltage, and the energy is dissipated by the energy dissipation circuit. Although this is not possible with the conventional circuit of FIG. 4, the circuit of the present invention can suppress the counter electromotive force generated in the magnetic torquer.
次に、第１図の磁気トルカ駆動回路の特性を従来の磁気
トルカ駆動回路と対比して説明する。第２図（ａ）は、
従来の磁気トルカ駆動回路の特性を示し、横軸が時間、
縦軸が磁気トルカ両端の電圧を示す。従来の磁気トルカ
駆動回路では、磁気トルカ２に流れる電流を遮断した瞬
間に、スパイク状の逆起電圧が発生し、その大きさは数
百ボルト程度になることもある。一方、第１図の磁気ト
ルカ駆動回路では、第２図（ｂ）に示すように、前述の
スパイク状の逆起電圧は発生せず、若干の間、駆動電圧
と同程度の逆起電圧が発生するだけである。Next, the characteristics of the magnetic torquer drive circuit of FIG. 1 will be described in comparison with a conventional magnetic torquer drive circuit. Figure 2 (a) shows
Shows the characteristics of the conventional magnetic torquer drive circuit, the horizontal axis is time,
The vertical axis shows the voltage across the magnetic torquer. In the conventional magnetic torquer drive circuit, a spike-like counter electromotive voltage is generated at the moment when the current flowing through the magnetic torquer 2 is cut off, and the magnitude thereof may be about several hundred volts. On the other hand, in the magnetic torquer drive circuit of FIG. 1, as shown in FIG. 2 (b), the above-mentioned spike-like counter electromotive voltage is not generated, and for a while, a counter electromotive voltage of the same level as the drive voltage is generated. It just happens.
第３図にエネルギ散逸回路１の一具体例を示す。この回
路は、逆起電力による電源電圧の変動をツェナーダイオ
ードCR5で検出し、Tr5をオンにし、逆起電力のエネルギ
を抵抗ＲＬで散逸する。FIG. 3 shows a specific example of the energy dissipation circuit 1. This circuit detects the fluctuation of the power supply voltage due to the back electromotive force with the Zener diode CR5, turns on Tr5, and dissipates the energy of the back electromotive force with the resistor R L.
なお、第１図の回路ではCR1〜４は単にダイオードとし
たが、これらダイオードの概念にはダイオード接続した
トランジスタが含まれることは勿論である。Although CR1 to CR4 are simply diodes in the circuit of FIG. 1, it goes without saying that diodes are included in the concept of these diodes.
（発明の効果） 以上に説明したように、本発明の磁気トルカ駆動回路
は、逆起電力を流す回路とそのエネルギを散逸させる回
路とにより、磁気トルカに流れる電流を遮断する際に発
生する逆起電圧を抑制できる。(Effects of the Invention) As described above, the magnetic torquer drive circuit of the present invention includes the reverse torque generated when the current flowing through the magnetic torquer is interrupted by the circuit that flows the counter electromotive force and the circuit that dissipates the energy. The electromotive force can be suppressed.
第１図は本発明の一実施例を示す回路図、第２図は本発
明の一実施例と従来の磁気トルカ駆動回路の特性を対比
して示す特性図、第３図は第１図におけるエネルギ散逸
回路の一具体例を示す回路図、第４図は従来の磁気トル
カ駆動回路を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a characteristic diagram showing the characteristics of an embodiment of the present invention and a conventional magnetic torquer drive circuit in comparison, and FIG. FIG. 4 is a circuit diagram showing a specific example of the energy dissipation circuit, and FIG. 4 is a circuit diagram showing a conventional magnetic torquer drive circuit.
Claims (1)
接続される第１及び第２のトランジスタと、前記出力端
子間に同じ極性に直列に接続される第３及び第４のトラ
ンジスタとを備えてなり、前記第１及び第２のトランジ
スタは前記出力端子の極性に対し前記第３及び第４のト
ランジスタとは逆の極性に当該出力端子に接続されてお
り、前記第１及び第２のトランジスタの接続点と前記第
３及び第４のトランジスタの接続点との間に磁気トルカ
が接続され前記第１及び第４のトランジスタが導通にさ
れ前記第２及び第３のトランジスタが遮断にされる第１
の期間と前記第１及び第４のトランジスタが遮断にされ
前記第２及び第３のトランジスタが導通にされる第２の
期間とで互いに逆向きに駆動電流を前記磁気トルカに供
給する磁気トルカ駆動回路において、 前記第１乃至第４のトランジスタに並列にそれぞれ接続
されている第１乃至第４のダイオードと、前記出力端子
間に接続されているエネルギ散逸回路とを備えてなり、 前記第１及び第３のダイオードとこれらに対応する前記
第１及び第３のトランジスタとではダイオードのアノー
ド及びカソードがトランジスタのコレクタ及びエミッタ
にそれぞれ接続されており、 前記第２及び第４のダイオードとこれらに対応する前記
第２及び第４のトランジスタとではダイオードのアノー
ド及びカソードがトランジスタのエミッタ及びコレクタ
にそれぞれ接続されており、 前記エルギ散逸回路は、前記第１及び第４のダイオード
又は前記第２及び第３のダイオードを介して加えられる
前記磁気トルカの逆起電力が所定値を越えたときに前記
出力端子間に抵抗器を挿入することを特徴とする磁気ト
ルカ駆動回路。1. A first and a second transistor connected in series with the same polarity between output terminals of a DC power supply, and a third and a fourth transistor connected in series with the same polarity between the output terminals. The first and second transistors are connected to the output terminal with a polarity opposite to that of the third and fourth transistors with respect to the polarity of the output terminal, and the first and second transistors are connected. A magnetic torquer is connected between the connection point of the transistor of No. 3 and the connection point of the third and fourth transistors, the first and fourth transistors are made conductive, and the second and third transistors are cut off. First
Drive for supplying a drive current to the magnetic torquer in opposite directions during a period of 2 and a second period in which the first and fourth transistors are turned off and the second and third transistors are turned on. The circuit includes first to fourth diodes connected in parallel to the first to fourth transistors, respectively, and an energy dissipation circuit connected between the output terminals, In the third diode and the corresponding first and third transistors, the anode and the cathode of the diode are connected to the collector and the emitter of the transistor, respectively, and the second and fourth diodes and the corresponding ones. With the second and fourth transistors, the anode and cathode of the diode are connected to the emitter and collector of the transistor, respectively. The ergi dissipation circuit is connected to each of the first and fourth diodes or the second and third diodes when the back electromotive force of the magnetic torquer exceeds a predetermined value. A magnetic torquer driving circuit, wherein a resistor is inserted between the output terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017657A JPH0757068B2 (en) | 1988-01-28 | 1988-01-28 | Magnetic torquer drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017657A JPH0757068B2 (en) | 1988-01-28 | 1988-01-28 | Magnetic torquer drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01191907A JPH01191907A (en) | 1989-08-02 |
| JPH0757068B2 true JPH0757068B2 (en) | 1995-06-14 |
Family
ID=11949925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63017657A Expired - Lifetime JPH0757068B2 (en) | 1988-01-28 | 1988-01-28 | Magnetic torquer drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757068B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107718B (en) * | 2012-11-30 | 2015-07-08 | 北京控制工程研究所 | Control circuit of energy discharging of large magnetic moment magnetorquer |
| CN112478201A (en) * | 2020-11-27 | 2021-03-12 | 山东航天电子技术研究所 | Magnetic torquer drive circuit based on constant current source |
-
1988
- 1988-01-28 JP JP63017657A patent/JPH0757068B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01191907A (en) | 1989-08-02 |
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