CN206387849U - A kind of current sampling circuit for unipolarity H bridges driving direct current generator - Google Patents
A kind of current sampling circuit for unipolarity H bridges driving direct current generator Download PDFInfo
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- CN206387849U CN206387849U CN201621473306.XU CN201621473306U CN206387849U CN 206387849 U CN206387849 U CN 206387849U CN 201621473306 U CN201621473306 U CN 201621473306U CN 206387849 U CN206387849 U CN 206387849U
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Abstract
A kind of current sampling circuit for unipolarity H bridges driving direct current generator, including voltage collector, H-bridge circuit and bleeder circuit, H-bridge circuit includes direct current generator M, the first bridge arm and the second bridge arm, and the first bridge arm and the second bridge arm drive direct current generator M rotatings respectively.Internal resistance when this direct current generator current sampling circuit is dexterously turned on using metal-oxide-semiconductor, electric current is produced on metal-oxide-semiconductor when by metal-oxide-semiconductor Q3 or metal-oxide-semiconductor Q4 voltage difference and the cooperation of bleeder circuit, so that the voltage of the first signal acquisition port or secondary signal collection port produces different magnitudes of voltage, i.e. so as to it calculate the electric current for the electric current direct current generator for flowing through metal-oxide-semiconductor.
Description
Technical field
The utility model is related to electronic circuit field, and in particular to a kind of electricity for unipolarity H bridges driving direct current generator
Flow sample circuit.
Background technology
Traditional CPU drives direct current generator circuit by H bridges, and high-power resistance is accessed between H bridges bridge arm and power supply ground,
The small electric pressure difference produced by the electric current of convection current excessive power resistance, enters after with operational amplifier, voltage difference is amplified to electric current
Row calculates control.The component that this traditional current sampling circuit includes is more, and circuit structure is complicated, the circuit cost manufactured
Height, power resistor heating is high, and efficiency is low, and the low noise immunity of sampling precision is low.
Utility model content
The utility model in view of the shortcomings of the prior art, proposes that discrimination is high, and one kind simple in construction is used for unipolarity H bridges
The current sampling circuit of direct current generator is driven, concrete technical scheme is as follows：
A kind of one current sampling circuit for unipolarity H bridges driving direct current generator, it is characterised in that：Including voltage acquisition
Device, H-bridge circuit and bleeder circuit, the H-bridge circuit include direct current generator M, the first bridge arm and the second bridge arm, first bridge arm
The direct current generator M rotatings are driven respectively with the second bridge arm；
First bridge arm is made up of the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 of N-channel, the metal-oxide-semiconductor Q1 drains and working power end
Mouth is connected, and the metal-oxide-semiconductor Q1 source class is connected with metal-oxide-semiconductor Q3 drains；
Second bridge arm is made up of the metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q4 of N-channel, the metal-oxide-semiconductor Q2 drains and working power end
Mouth is connected, and the metal-oxide-semiconductor Q2 source class is connected with metal-oxide-semiconductor Q4 drains, and the metal-oxide-semiconductor Q3 source class is connected with the metal-oxide-semiconductor Q4 source class
Connect；
Described direct current generator M one end is connected on the source class of the metal-oxide-semiconductor Q1, and the direct current generator M other ends are connected to
On the source class of the metal-oxide-semiconductor Q2；
The bleeder circuit includes resistance R1, and resistance R1 first end is connected with reference power supply input port, resistance R1's
Second end is connected with resistance R2 first end, and the second end of the resistance R2 is grounded through the resistance R3, the resistance R2 second
End is also connected with direct current generator M one end；
The bleeder circuit includes resistance R4, and the first end of the resistance R4 is connected with reference power supply input port, described
Resistance R4 the second end is connected with resistance R5 first end, and the second end of the resistance R5 is grounded through the resistance R6, the electricity
Resistance R6 second ends are also connected with the direct current generator M other ends；
The resistance R1 and the resistance R2 common port are the first current acquisition port；
The resistance R3 and the resistance R4 common port are the second current acquisition port.
Further：The metal-oxide-semiconductor Q3 source class and metal-oxide-semiconductor Q4 source class ground connection.
The beneficial effects of the utility model are：When this direct current generator current sampling circuit is dexterously turned on using metal-oxide-semiconductor
Internal resistance, electric current is produced on metal-oxide-semiconductor when by metal-oxide-semiconductor Q3 or metal-oxide-semiconductor Q4 voltage difference and the cooperation of bleeder circuit, makes
The voltage for obtaining the first signal acquisition port or secondary signal collection port produces different magnitudes of voltage, and MOS is flowed through so as to calculate
I.e. the electric current of the electric current direct current generator of pipe.
Brief description of the drawings
Fig. 1 is circuit principle structure schematic diagram of the present utility model.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
As shown in Figure 1：A kind of current sampling circuit for unipolarity H bridges driving direct current generator, including voltage collector,
H-bridge circuit and bleeder circuit, H-bridge circuit include direct current generator M, the first bridge arm and the second bridge arm, the first bridge arm and the second bridge arm
Direct current generator M rotatings are driven respectively；
First bridge arm is made up of the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 of N-channel, and metal-oxide-semiconductor Q1 drains are connected with working power port,
Metal-oxide-semiconductor Q1 source class is connected with metal-oxide-semiconductor Q3 drains；
Second bridge arm is made up of the metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q4 of N-channel, and metal-oxide-semiconductor Q2 drains are connected with working power port,
Metal-oxide-semiconductor Q2 source class is connected with metal-oxide-semiconductor Q4 drains, and metal-oxide-semiconductor Q3 source class is connected with metal-oxide-semiconductor Q4 source class, metal-oxide-semiconductor Q3 source class and MOS
Pipe Q4 source class is grounded.
Direct current generator M one end is connected on metal-oxide-semiconductor Q1 source class, and the direct current generator M other ends are connected to metal-oxide-semiconductor Q2 source class
On；
Bleeder circuit includes resistance R1, and resistance R1 first end is connected with reference power supply input port, and the second of resistance R1
End is connected with resistance R2 first end, resistance R2 the second end through resistance R3 ground connection, the ends of resistance R2 second also with direct current generator M mono-
End is connected；
Bleeder circuit includes resistance R4, and resistance R4 first end is connected with reference power supply input port, and the second of resistance R4
End is connected with resistance R5 first end, and resistance R5 the second end is grounded through resistance R6, and the ends of resistance R6 second are also another with direct current generator M
One end is connected.Resistance R1 and resistance R2 common port are the first signal acquisition port, and resistance R3 and resistance R4 common port is the
Binary signal gathers port.
Circuit operation principle：When the diagonal metal-oxide-semiconductor Q1 of H-bridge circuit, metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 grid all
During plus low level, when H-bridge circuit is not turned on, reference voltage is passed through on the first signal acquisition port and secondary signal collection port
The output voltage of the current sampling circuit constituted with divider resistance is a steady state value S1.If in metal-oxide-semiconductor Q1 grid and metal-oxide-semiconductor
High level is added on Q4 grid, is turned between metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q4, driving direct current generator is rotated forward.At this moment, metal-oxide-semiconductor Q4 will
Short-circuit resistance R6, electric current flows through Q4, because of Q4 intrinsic internal resistance, when flowing through different electric currents, and metal-oxide-semiconductor Q4 two ends will produce difference therewith
Voltage difference, then secondary signal collection port output voltage S2 synchronous changes therewith, by output voltage S2 and output voltage S1 ratios
Compared with metal-oxide-semiconductor Q4 electric current is flowed through in calculating, that is, flows through the electric current of direct current generator.When direct current generator is inverted, metal-oxide-semiconductor Q2 and MOS
Pipe Q3 is turned on, and principle is ibid.
Claims (2)
1. a kind of current sampling circuit for unipolarity H bridges driving direct current generator, it is characterised in that：Including voltage collector, H
Bridge circuit and bleeder circuit, the H-bridge circuit include direct current generator M, the first bridge arm and the second bridge arm, first bridge arm and the
Two bridge arms drive the direct current generator M rotatings respectively；
First bridge arm is made up of the metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 of N-channel, the metal-oxide-semiconductor Q1 drains and working power port phase
Even, the metal-oxide-semiconductor Q1 source class is connected with metal-oxide-semiconductor Q3 drains；
Second bridge arm is made up of the metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q4 of N-channel, the metal-oxide-semiconductor Q2 drains and working power port phase
Even, the metal-oxide-semiconductor Q2 source class is connected with metal-oxide-semiconductor Q4 drains, and the metal-oxide-semiconductor Q3 source class is connected with the metal-oxide-semiconductor Q4 source class；
Described direct current generator M one end is connected on the source class of the metal-oxide-semiconductor Q1, and the direct current generator M other ends are connected to described
On metal-oxide-semiconductor Q2 source class；
The bleeder circuit includes resistance R1, and resistance R1 first end is connected with reference power supply input port, and the second of resistance R1
End is connected with resistance R2 first end, and the second end of the resistance R2 is grounded through the resistance R3, and the ends of resistance R2 second are also
It is connected with direct current generator M one end；
The bleeder circuit includes resistance R4, and the first end of the resistance R4 is connected with reference power supply input port, the resistance
R4 the second end is connected with resistance R5 first end, and the second end of the resistance R5 is grounded through the resistance R6, the resistance R6
Second end is also connected with the direct current generator M other ends；
The resistance R1 and the resistance R2 common port are the first current acquisition port；
The resistance R3 and the resistance R4 common port are the second current acquisition port.
2. a kind of according to claim 1 be used for the current sampling circuit that unipolarity H bridges drive direct current generator, its feature exists
In：The metal-oxide-semiconductor Q3 source class and metal-oxide-semiconductor Q4 source class ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473306.XU CN206387849U (en) | 2016-12-30 | 2016-12-30 | A kind of current sampling circuit for unipolarity H bridges driving direct current generator |
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| CN201621473306.XU CN206387849U (en) | 2016-12-30 | 2016-12-30 | A kind of current sampling circuit for unipolarity H bridges driving direct current generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596445A (en) * | 2019-09-09 | 2019-12-20 | 南京快轮智能科技有限公司 | Electric vehicle current measuring method |
| CN110971159A (en) * | 2019-11-13 | 2020-04-07 | 齐鲁工业大学 | High-power speed regulation and protection circuit system of H-bridge direct-current motor |
| CN112087171A (en) * | 2020-08-26 | 2020-12-15 | 湖南英迈智能科技有限公司 | Current smoothing method and device |
-
2016
- 2016-12-30 CN CN201621473306.XU patent/CN206387849U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596445A (en) * | 2019-09-09 | 2019-12-20 | 南京快轮智能科技有限公司 | Electric vehicle current measuring method |
| CN110971159A (en) * | 2019-11-13 | 2020-04-07 | 齐鲁工业大学 | High-power speed regulation and protection circuit system of H-bridge direct-current motor |
| CN110971159B (en) * | 2019-11-13 | 2022-02-08 | 齐鲁工业大学 | High-power speed regulation and protection circuit system of H-bridge direct-current motor |
| CN112087171A (en) * | 2020-08-26 | 2020-12-15 | 湖南英迈智能科技有限公司 | Current smoothing method and device |
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