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Excitation power circuit of rotary transformer

A technology of rotary transformer and excitation power supply, which is applied in the direction of conversion equipment that can be converted to DC without intermediate conversion. It can solve the problems of complex circuits and inability to work independently, and achieve low output waveform distortion, insensitive to temperature changes, and stability. good sex effect

Inactive Publication Date: 2011-09-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an excitation power supply circuit of a rotary transformer, which solves the problem that the existing rotary transformer excitation power supply has complex circuits and cannot work independently

Method used

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  • Excitation power circuit of rotary transformer
  • Excitation power circuit of rotary transformer
  • Excitation power circuit of rotary transformer

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specific Embodiment approach 1

[0010] Specific implementation mode 1: the following combination Figure 1-Figure 2 To describe this embodiment, this embodiment consists of a sinusoidal oscillation circuit 1, an amplitude adjustment circuit 2, and a power amplifier circuit 3. The sinusoidal oscillation circuit 1 is composed of resistors R1, R2, resistors R3, resistors R4, resistors R5, capacitors C1, and capacitors. C2, capacitor CSEL1, capacitor CSEL2, first operational amplifier 11 and second operational amplifier 12, amplitude adjustment circuit 2 is composed of resistor R6, resistor R7, resistor RSEL, capacitor C3 and third operational amplifier 21, power amplifier circuit 3 It consists of resistor R8, resistor R9 and power amplifier 31,

[0011] One end of the resistor R1 is connected to the analog ground, the other end of the resistor R1 is connected to the inverting input terminal of the first operational amplifier 11, and the resistor R2 is connected between the inverting input terminal and the output t...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the power amplifier circuit 3 further includes a resistor R9, one end of the resistor R9 is connected to the output end of the power amplifier 31, and the other end of the resistor R9 is the excitation power supply The output of the circuit. Other components and connection relationships are the same as in the first embodiment.

[0029] The resistor R9 is connected to the output end of the power amplifier 31, and the resistance value can be selected in the range of tens of ohms. It mainly plays a role in matching the line impedance, so that the generated sinusoidal excitation signal will not be mismatched due to impedance during long-distance transmission. Produce crosstalk or signal reflection phenomenon.

specific Embodiment approach 3

[0030] Specific embodiment 3: The difference between this embodiment and the first or second embodiment is that the capacitors all use ceramic electrodeless capacitors. Other components and connection relationships are the same as those in the first or second embodiment.

[0031] Ceramic electrodeless capacitors have a wide selection of capacitance values, and at the same time they are low in price, which is beneficial to frequency selection and reduces circuit costs.

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Abstract

The invention discloses an excitation power circuit of a rotary transformer, belongs to the field of drive power sources, and solves the problems of complex circuit and incapability of independently working in the traditional excitation power of the rotary transformer. The excitation power circuit consists of a sinusoidal oscillation circuit, an amplitude adjusting circuit and a power amplifying circuit, wherein the sinusoidal oscillation circuit consists of a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor CSEL1, a capacitor CSEL2, a first operational amplifier and a second operational amplifier; the amplitude adjusting circuit consists of a resistor R6, a resistor R7, a resistor RSEL, a capacitor C3 and a third operational amplifier; and the power amplifying circuit comprises a resistor R8 and a power amplifier. The frequency of a sinusoidal excitation power source generated by the circuit of the invention is modulated by selecting a capacitance value of the capacitor CSEL1 and the capacitor CSEL2, and the amplitude value of the sinusoidal excitation power source is adjusted by changing the resistance value of the resistor RSEL. The excitation power circuit of the invention serves as the drive power source of the rotary transformer.

Description

Technical field [0001] The invention relates to an excitation power supply circuit of a rotary transformer, which belongs to the field of driving power supplies. Background technique [0002] Resolvers are widely used in military products, robotics, aerospace, mining and other industries as precision angle measurement because of their super vibration resistance, oil resistance, water resistance, high and low temperature resistance and long service life. Device. The resolver is a passive device, and it must be excited by a sinusoidal drive power supply to generate analog position information output. Therefore, the frequency and amplitude of the sine excitation power supply and the distortion of the waveform directly affect the measurement accuracy of the resolver. [0003] There are three main ways to generate excitation power: In the early days, traditional analog passive components were used to build an oscillating circuit with a certain frequency, and then a sinusoidal excitati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/10
Inventor 介党阳倪风雷顾义坤党进张庆利郭闯强
Owner HARBIN INST OF TECH
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