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Multichannel series power supply

A multi-channel, power supply technology, used in electrical components, adjusting electrical variables, instruments, etc., can solve the problems of unusable accuracy requirements of test equipment, component performance fluctuations, ripple and noise, etc., to achieve high stability and reduce heat generation. , the effect of low power consumption

Pending Publication Date: 2019-07-05
江苏易美新思新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the switching power supply can easily use high-voltage isolation technology to realize the characteristic simulation of multiple batteries connected in series, due to the inherent ripple and noise of the switching power supply, as well as heat generation problems, it will cause performance fluctuations of components and power supply. Fluctuations, so that the corresponding test equipment cannot be used in occasions that require relatively high precision

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] to combine figure 1 with figure 2 , in this embodiment, the power input unit is a programmable linear power supply, the programmable linear power supply is connected to the DC power supply signal, and the multi-channel DAC unit is provided with a signal conversion channel corresponding to the programmable linear power supply; the control unit is controlled by the multi-channel DAC unit Voltage signal output of programmable linear power supply. The input of the programmable linear power supply can be connected to the high-voltage switching power supply input, and the programmable linear power supply can use the existing programmable power supply module, which is combined with the digital-to-analog conversion DAC, and the voltage setting signal is transmitted to the DAC through the controller MCU, and then obtained The required voltage is the prior art.

[0034] Such as figure 2 , the voltage at the power output terminal collected by each signal conversion channel of...

Embodiment 2

[0046] Unlike Example 1, the combination figure 1 with image 3 As shown, the power output driving unit described in this embodiment includes an output driver, and the output driver includes a reference voltage input terminal, a feedback input terminal, and an output terminal; Pressure point voltage signal VR k , the feedback input terminal is grounded through the feedback resistor R1, and at the same time connected to the output terminal through an adjustment resistor R2, the output terminal outputs the voltage VH k ; The feedback input terminal is also connected to a reverse adjustment power supply through a reverse adjustment resistor R3. This structural design enables bidirectional adjustment of the voltage at the dividing point.

[0047] Define the voltage division points in the resistor voltage division unit to be numbered 1-n according to the voltage from low to high, then connect the i-th voltage divider to the power output drive unit connected to the 1st to (n-1) vo...

Embodiment 1 and Embodiment 2

[0050] Based on embodiment 1 and embodiment 2, control principle of the present invention is:

[0051] A: If the output voltage of each channel is required to be relatively independent:

[0052] The value of the differential output voltage VO of each channel is set in the central control unit VOK, and the MCU calculates V according to the set value 总 , to control V 总 To meet the requirements, for example (n+1)*VO, the high-precision ADC simultaneously detects the output voltage VHk of each channel, calculates the differential output voltage Vk-1, and then compares the measured value with the set value. If there is a large deviation, Then the control unit adjusts the output control current of the DAC, thereby adjusting the voltage of R2, and then adjusting the output voltage. The adjustment method is: VDACk=VDACk-1+C*[Vk-1-VOk], and the coefficient C indicates that the voltage is close to the set value during adjustment. The speed of the voltage value can improve the performa...

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Abstract

The invention discloses a multichannel series power supply, comprising a microcontroller, a voltage source unit, a multichannel DAC unit, a multichannel ADC unit, a resistor voltage division unit anda plurality of power output units. The multichannel DAC unit and the multichannel ADC unit are equipped with signal conversion channels correspondingly connected with each power output unit. The voltage source unit outputs a total voltage signal. The resistor voltage division unit comprises a plurality of voltage division resistors which are connected among output ends of the voltage source unit in series and is equipped with a plurality of voltage division points. In each power output drive unit, a reference power input end is connected with a voltage division point in the resistor voltage division unit. The multichannel ADC unit collects a voltage signal of a power output end of each power output drive unit and transmits the voltage signal to the microcontroller. The microcontroller controls each power output drive unit to output a power signal of a preset voltage through utilization of the multichannel DAC unit. According to the multichannel series power supply, series of a plurality of batteries is simulated through utilization of a linear circuit, multichannel direct current power supplies can be provided at the same time, voltages are stable, and power consumption is low.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a multi-channel series power supply. Background technique [0002] Nowadays, many test equipment use switching power supply technology to simulate the characteristics of the battery when performing testing work, and provide working current for the tested components and other objects to solve the problem of connecting multiple batteries in series. However, although the switching power supply can easily use high-voltage isolation technology to realize the characteristic simulation of multiple batteries connected in series, due to the inherent ripple and noise of the switching power supply, as well as heat generation problems, it will cause performance fluctuations of components and power supply. Fluctuations, so that the corresponding test equipment can not be used in occasions that require relatively high precision. Contents of the invention [0003] The technical proble...

Claims

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Application Information

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IPC IPC(8): H02M3/156
CPCH02M3/156H02M1/007
Inventor 侯晓华董婉莹王林郭维张智周亚军
Owner 江苏易美新思新能源科技有限公司
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