Multi-turn memory rotary transformer decoding circuit and position calculating method thereof

A technology of a resolver and a decoding circuit, which is used in the use of electro/magnetic devices to transmit directions such as sensing components

Inactive Publication Date: 2016-01-06
SHANGHAI RADIO EQUIP RES INST +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the system is powered off, if the motor shaft is artificially moved, the system needs to reset the motor rotor

Method used

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  • Multi-turn memory rotary transformer decoding circuit and position calculating method thereof
  • Multi-turn memory rotary transformer decoding circuit and position calculating method thereof
  • Multi-turn memory rotary transformer decoding circuit and position calculating method thereof

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Embodiment Construction

[0052] based on the following Figure 1 to Figure 5 , specifically explain the preferred embodiment of the present invention.

[0053] Schematic diagram of the rotary transformer figure 1 As shown, the primary field winding (R1-R2) and the two-phase secondary induction windings (S1-S3 and S2-S4) are on the stator side of the motor. When working, a 20KHz sinusoidal excitation signal is applied to the primary excitation winding R1-R2, and the output voltage of the secondary induction winding changes with the angle between the rotor and the primary excitation winding. The relationship between them is as follows:

[0054] E. R1-R2 =E 0sin(ωt)(1)

[0055] E. S1-S3 =KE 0 sin(ωt)sinθ(2)

[0056] E. S2-S4 =KE 0 sin(ωt)cosθ(3)

[0057] In the formula, E 0 is the voltage amplitude of the sinusoidal excitation signal, ω is the angular frequency of the sinusoidal excitation signal, K is the transformation ratio of the resolver, and θ is the angle between the primary excitation ...

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Abstract

A multi-turn memory rotary transformer decoding circuit and a position calculating method thereof. A rotary transformer exciting circuit generates a sinusoidal excitation signal to be applied to a primary exciting winding, a rotary transformer output signal acquisition circuit samples an output voltage value of a secondary induction winding, a position calculating circuit calculates according to the output voltage value of the secondary induction winding of the rotary transformer to obtain the motor rotor angle, the motor rotor speed and the number of turns of the motor rotor, and a power management circuit can still provide electric energy for the multi-turn memory rotary transformer decoding circuit under the outage condition of external power supply. The multi-turn memory rotary transformer decoding circuit provided by the invention provides motor multi-turn absolute angle information while providing high-precision motor rotor angle information and rotating speed information, and can still complete a function of decoding rotary transformer information under the condition that a system is powered down.

Description

technical field [0001] The invention relates to a multi-turn memory rotary transformer decoding circuit and a position solving method thereof. Background technique [0002] In the robot servo system, it is necessary to detect the position of the rotor in real time, and at the same time, it is necessary to detect the rotation speed of the motor and the absolute angle of the multi-turn rotation of the motor, so as to achieve high-precision control of the torque, speed, and position of the drive mechanism of the motor. At present, commonly used position sensing components mainly include Hall sensors, photoelectric encoders, magnetic encoders, and resolvers. Due to its simple structure, high temperature resistance, humidity resistance, vibration resistance, and strong anti-interference ability, resolvers are often used in harsh working environments. [0003] Resolver, referred to as resolver, is a sensing element whose output voltage changes with the rotor angle. When the reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14
Inventor 邵智琦吴雄君吕鉴卓韩非
Owner SHANGHAI RADIO EQUIP RES INST
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