Control circuit of energy discharging of large magnetic moment magnetorquer

Abstract

The invention provides a control circuit of energy discharging of a large magnetic moment magnetorquer which comprises a macro-energy independent discharging circuit and an H-bridge drive circuit. When the H-bridge drive circuit is reversed, the macro-energy independent discharging circuit is adopted, and the macro-energy independent discharging circuit transfers most of energy on a magnetorquer body to a power component in the discharging circuit, so that the purpose of the energy discharging is achieved. Under other working states, the H-bridge drive circuit is utilized to discharge the energy of the magnetorquer, power tubes and diodes in the H-bridge circuit and the magnetorquor body are utilized to form a break-over return circuit, and the energy of the magnetorquer body is gradually discharged. The control circuit is simple and reliable in structure, low in power consumption, long in service life, wide in application range, and capable of satisfying requirements of the energy discharging of magnetorquer bodies with different standards.

Description

technical field [0001] The invention relates to a control method for energy discharge, in particular to a control method suitable for energy discharge of a large magnetic moment magnetic torque device. Background technique [0002] The magnetic torquer is one of the executive parts of the spacecraft. It consists of the magnetic torquer body and the drive circuit that provides it with a specific excitation current. It has been widely used in spacecraft attitude control. At present, the output magnetic moment of the magnetic torque device used in the world is usually 5 ~ 1000Am 2 , The magnetic torquer used on domestic spacecraft usually outputs a magnetic moment of 25-400Am 2 . At present, my country is building a space laboratory. The spacecraft developed are very large in size and weight, and the requirements for attitude maneuverability and momentum unloading are very high, resulting in high requirements for the output magnetic moment of the magnetic torque device. There...

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Problems solved by technology

The inductance of the large magnetic moment magnetic torque device is about ten H, and the maximum excitation current is several hundred mA. When the energy is discharged, if the current magnetic torque device energy discharge control circuit is still used, the excitation current will be generated to the power supply. The phenomenon of voltage charging causes the power supply voltage to rise. In the worst case, the power supply voltage can be raised to 4 to 5 times the nominal voltage value, which greatly increases the operating voltage of the device connected to the power supply in the drive circuit, causing the device damage

Therefore, the existing technology cannot meet the control requirements of the energy discharge of the large magnetic moment magnetic torque device

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