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Dual-subtraction alternating current sampling circuit for integrated power supply

A technology of alternating current and sampling circuit, applied in the field of double subtraction alternating current sampling circuit, can solve the problems of low sampling accuracy, sampling circuit sampling interference, sampling circuit damage, etc., to achieve conversion technology difficulties and improve the effect of sampling accuracy

Inactive Publication Date: 2015-04-29
成都昊地科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In most motor speed regulation and other control systems, current sampling is used for current feedback control, but many current sampling circuits use the power supply as a reference for sampling points. It brings interference, and the sampling accuracy is not high. Once there is a fault in the motor or a surge circuit, it is easy to cause damage to the sampling circuit

Method used

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  • Dual-subtraction alternating current sampling circuit for integrated power supply

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing:

[0011] Such as figure 1 As shown, the present invention includes a reference voltage input terminal A1, a reference voltage output terminal a1, a voltage input terminal B1, a voltage output terminal b2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor Resistor R5, sixth resistor R6, seventh resistor R7, eighth resistor R8, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, first diode D1, second diode D2, the third diode D3, the fourth diode D4, the first amplifier U1 and the second amplifier U2, the reference voltage input terminal A1 is respectively connected to the first terminal of the first resistor R1 and the first terminal of the second capacitor C2 It is connected to the first end of the fifth resistor R5, the second end of the first resistor R1 is respectively connected to the pos...

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PUM

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Abstract

The invention discloses a dual-subtraction alternating current sampling circuit for an integrated power supply. The circuit comprises a reference voltage input end, a reference voltage output end, a voltage input end, a voltage output end, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode, a third diode, a fourth diode, a first amplifier and a second amplifier. According to the circuit, two paths of voltage are adopted for the respective detection of current voltage, so that the sampling accuracy is improved, the shortcomings of sampling of a high-end current sampling circuit with reference to power in the prior art are overcome, and the technical problem is effectively converted.

Description

technical field [0001] The invention relates to a current sampling device, in particular to a double-subtraction alternating current sampling circuit of an integrated power supply. Background technique [0002] The integrated power supply is based on the DC power supply, a combination of DC power supply and any kind of power supply or more than one kind of power supply, DC power supply, AC uninterruptible power supply (UPS) for electric power and inverter power supply (INV) for electric power, The DC conversion power supply (DC / DC) for communication and other devices are combined into one, the battery pack of the DC power supply is shared, and the complete set of equipment is uniformly monitored. [0003] In most motor speed regulation and other control systems, current sampling is used for current feedback control, but many current sampling circuits use the power supply as a reference for sampling points. It brings interference, and the sampling accuracy is not high. Once ...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 靖新宇
Owner 成都昊地科技有限责任公司
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