CN109507471A - Detection circuit/the method in load current direction, chip, electronic equipment - Google Patents
Detection circuit/the method in load current direction, chip, electronic equipment Download PDFInfo
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- CN109507471A CN109507471A CN201811580299.7A CN201811580299A CN109507471A CN 109507471 A CN109507471 A CN 109507471A CN 201811580299 A CN201811580299 A CN 201811580299A CN 109507471 A CN109507471 A CN 109507471A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/14—Indicating direction of current; Indicating polarity of voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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Abstract
The present invention provides a kind of detection circuit/method in load current direction, chip, electronic equipment, the detection circuit in the load current direction includes: conversion module, electric signal for exporting to a power module is converted, and the electric signal after conversion is drawn, to form signal to be detected；Detection module, for being detected to the signal to be detected；Sampling module, for acquiring detection module signal detected at the specified time point, according to the corresponding load current direction of the signal acquisition.The present invention provides structure ball bearing made, programmings simply, few and at low cost using number of devices, is suitable for large-scale business application.
Description
Technical field
The invention belongs to electronic circuit technology field, it is related to a kind of detection circuit and method, more particularly to a kind of load
Detection circuit/method of current direction, chip, electronic equipment.
Background technique
For two level three phase inverter bridges, according to control algolithm demand, real-time detection is needed to load three-phase current side
To.At present more typically using the realizations such as current sensor, current transformer, linear isolation amplifier load three-phase current
The real-time detection of detection, higher cost are unfavorable for large-scale business application, so needing to develop, a kind of structure is simple, precision
The method of high and low-cost load three-phase current angle detecting.
Therefore, how detection circuit/method, the chip, electronic equipment in a kind of load current direction are provided, it is existing to solve
Technical costs is higher, causes the defects of being unfavorable for large-scale business application, and it is urgently to be resolved to have become those skilled in the art in fact
The technical issues of.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of detections in load current direction
Circuit/method, chip, electronic equipment cause to be unfavorable for large-scale business application for solving prior art higher cost
Problem.
In order to achieve the above objects and other related objects, one aspect of the present invention provides a kind of detection electricity in load current direction
The detection circuit on road, the load current direction includes: conversion module, and the electric signal for exporting to a power module turns
It changes, and the electric signal after conversion is drawn, to form signal to be detected；Detection module, for being carried out to the signal to be detected
Detection；Sampling module, it is corresponding according to the signal acquisition for acquiring detection module signal detected at the specified time point
Load current direction.
In one embodiment of the invention, the power module is a DC power supply；The conversion module includes in parallel connects
The first inverter bridge leg, the second inverter bridge leg and the third inverter bridge leg connect；First inverter bridge leg, the second inverter bridge leg and
One end of three inverter bridge legs is connected to the anode of the DC power supply, first inverter bridge leg, the second inverter bridge leg and third
The other end of inverter bridge leg is connected to the cathode of the DC power supply.
In one embodiment of the invention, first inverter bridge leg is by first switch device and second switch devices in series
Composition；Second inverter bridge leg is composed in series by third switching device and the 4th switching device；The third inverter bridge leg by
5th switching device and the 6th switching device are composed in series.
In one embodiment of the invention, the first switch device, second switch device, third switching device, the 4th
Switching device, the 5th switching device and the 6th switching device are all made of the semiconductor devices with switching function；Wherein, described
The collector of one switching device, third switching device and the 5th switching device is connect with the anode of the DC power supply；Described
The transmitter of one switching device, third switching device and the 5th switching device respectively with second switch device, the 4th switching device
It is connected with the collector of the 6th switching device, the transmitting of the second switch device, the 4th switching device and the 6th switching device
Pole ground connection.
In one embodiment of the invention, the signal to be detected is the lower bridge arm second switch of first inverter bridge leg
The second of the 4th switching device both ends of lower bridge arm of the voltage signal to be detected of the first of device both ends, second inverter bridge leg to
The third at the 6th switching device both ends of lower bridge arm of detectable voltage signals, and/or third inverter bridge leg voltage letter to be detected
Number.
In one embodiment of the invention, the detection module includes: first detection unit, and input terminal is connected to described
The midpoint of first inverter bridge leg, for drawing the described first voltage signal to be detected；Second detection unit, input terminal are connected to
The midpoint of second inverter bridge leg, for drawing the described second voltage signal to be detected；Third detection unit, input terminal connect
It is connected to the midpoint of the third inverter bridge leg, for drawing third voltage signal to be detected.
In one embodiment of the invention, the first detection unit includes first diode, first capacitor, the first electricity
Resistance, second resistance, 3rd resistor R3, the 4th resistance and first comparator；Wherein, the negative pole end of the first diode receives the
One voltage signal to be detected, the positive terminal of the first diode and one end of first resistor, one end of first capacitor, the first ratio
Non-inverting input terminal compared with device is connected；The other end of the first resistor is connected with control power supply；The other end of the first capacitor
It is connected with control power ground；One end of the second resistance and described 3rd resistor one end, first comparator inverting input terminal phase
Even；The other end of the second resistance is connected with control power supply；The other end of the 3rd resistor is connected with control power ground；Institute
The output end for stating first comparator is connected with one end of the 4th resistance, and as first detection unit signal detected
Output end；The other end of 4th resistance is connected with control power supply.
In one embodiment of the invention, the second detection unit includes the second diode, the second capacitor, the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance and the second comparator；Wherein, the negative pole end of second diode receives second
Voltage signal to be detected, the positive terminal of second diode is compared with one end of the 5th resistance, one end of the second capacitor, second
The non-inverting input terminal of device is connected；The other end of 5th resistance is connected with control power supply；The other end of second capacitor with
Power ground is controlled to be connected；One end with the 7th resistance of one end of 6th resistance, the second comparator inverting input terminal phase
Even；The other end of 6th resistance is connected with control power supply；The other end of 7th resistance is connected with control power ground；
The output end of second comparator is connected with one end of the 8th resistance, and detected as the second detection unit
The output end of signal；The other end of 8th resistance is connected with control power supply.
In one embodiment of the invention, the third detection unit includes third diode, third capacitor, the 9th electricity
Resistance, the tenth resistance, eleventh resistor, twelfth resistor and third comparator；The negative pole end of the third diode D3 receives the
Three voltage signals to be detected, the positive terminal of the third diode and one end of the 9th resistance, one end of third capacitor, third ratio
Non-inverting input terminal compared with device is connected；The other end of 9th resistance is connected with control power supply；The other end of the third capacitor
It is connected with control power ground；One end of tenth resistance and one end, the third comparator inverting input terminal of 11 resistance
It is connected；The other end of tenth resistance is connected with control power supply；The other end of the eleventh resistor and control power ground phase
Connection；The third comparator output terminal is connected with one end of twelfth resistor, and is detected as the third detection unit
Signal output end；The other end of the twelfth resistor is connected with control power supply.
In one embodiment of the invention, the acquisition module includes: the first acquisition unit, for acquiring first inspection
Survey the high/low level signal of unit signal detected；Second acquisition unit is detected for acquiring the second detection unit
Signal high/low level signal；Third acquisition unit, for acquire the height of the third detection unit signal detected/
Low level signal.
In one embodiment of the invention, the specified time point is the midpoint of the conversion module turn-on time
Place.
In one embodiment of the invention, first acquisition unit, second acquisition unit, third acquisition are single
Member is all made of digital signal processor.
Another aspect of the present invention provides a kind of chip, and the chip includes the detection circuit in the load current direction.
Another aspect of the invention provides a kind of electronic equipment, and the electronic equipment includes the chip.
Last aspect of the present invention provides a kind of detection method in load current direction, the detection in the load current direction
Method includes: to convert to the electric signal of an input, and the electric signal after conversion is drawn, to form signal to be detected；It is right
The signal to be detected is detected；Detection module signal detected is acquired at the specified time point, is obtained according to the signal
Take corresponding load current direction
As described above, detection circuit/the method in load current direction of the present invention, chip, electronic equipment, have with
It is lower the utility model has the advantages that
Detection circuit/the method in load current direction of the present invention, chip, that electronic equipment provides structure is simply electric
Road, programming are simple, few and at low cost using number of devices, are suitable for large-scale business application.
Detailed description of the invention
Fig. 1 is shown as theory structure schematic diagram of the detection circuit in load current direction of the invention in an embodiment.
Fig. 2 is shown as circuit diagram of the detection circuit in load current direction of the invention in an embodiment.
Fig. 3 is shown as the waveform diagram of each signal in current detection circuit of the invention.
Fig. 4 is shown as flow diagram of the detection method in load current direction of the invention in an embodiment.
Component label instructions
| 1 | The detection circuit in load current direction |
| 11 | Conversion module |
| 12 | Detection module |
| 13 | Sampling module |
| 111 | First inverter bridge leg |
| 112 | Second inverter bridge leg |
| 113 | Third inverter bridge leg |
| 121 | First detection unit |
| 122 | Second detection unit |
| 123 | Third detection unit |
| 131 | First acquisition unit |
| 132 | Second acquisition unit |
| 133 | Third acquisition unit |
| S41~S43 | Step |
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
The present invention provides a kind of detection circuit/method in load current direction, chip, electronic equipment, and the present invention is to pass through
Load current direction is obtained in particular point in time acquisition hardware circuit signal.The hardware of the detection circuit in the load current direction
It include: two-level inverter, inverter bridge lower bridge arm voltage detecting circuit and sampling A/D chip.The two-level inverter receives direct current
Voltage signal, by DC voltage, you become alternating voltage；Lower bridge arm current detection circuit connects with the two-level inverter
It connects, to detect inverter bridge bridge switch device both end voltage, and required low and high level is converted to according to tested voltage；The spy
It fixes time a little as two-level inverter lower bridge arm turn-on time midpoint.
Embodiment one
The present embodiment provides a kind of detection circuit in load current direction, the detection circuit packet in the load current direction
It includes:
Conversion module, the electric signal for exporting to a power module are converted, and the electric signal after conversion is drawn,
To form signal to be detected；
Detection module, for being detected to the signal to be detected；
Sampling module, for acquiring detection module signal detected at the specified time point, according to the signal acquisition
Corresponding load current direction.
The detection circuit in load current direction provided by the present embodiment is described in detail below with reference to diagram.Please
Refering to fig. 1, it is shown as theory structure schematic diagram of the detection circuit in load current direction in an embodiment.As shown in Figure 1, institute
The detection circuit 1 for stating load current direction is connect with a power module 2.In the present embodiment, the power module 2 uses three-phase
Direct current.The detection circuit 1 in the load current direction includes conversion module 11, detection module 12 and sampling module 13.
The conversion module 11 is used for the electric signal that exports to a power module and converts, and by the electric signal after conversion
It draws, to form signal to be detected.
Specifically, the conversion module 11 is used to the DC voltage that the power module 2 exports being converted to alternating voltage,
And draw the alternating voltage after conversion, form voltage to be detected.In the present embodiment, the conversion module 11 uses two level
Inverter bridge.
Referring to Fig. 2, being shown as circuit diagram of the detection circuit in load current direction in an embodiment.As shown in Fig. 2,
The conversion module 11 includes the first inverter bridge leg 111, the second inverter bridge leg 112 and the third inverter bridge leg 113 being connected in parallel.
One end of first inverter bridge leg 111, the second inverter bridge leg 112 and third inverter bridge leg 113 is connected to described
The anode of DC power supply 2, the other end of first inverter bridge leg 111, the second inverter bridge leg 112 and third inverter bridge leg 113
It is connected to the cathode of the DC power supply 2.
Wherein, first inverter bridge leg 111 is composed in series by first switch device S1 and second switch device S2；
Second inverter bridge leg 112 is composed in series by third switching device S3 and the 4th switching device S4；
The third inverter bridge leg 113 is composed in series by the 5th switching device S5 and the 6th switching device S6.
The first switch device S1, second switch device S2, third switching device S3, the 4th switching device S4, the 5th
Switching device S5 and the 6th switching device S6 are all made of the semiconductor devices with switching function, for example, insulated gate bipolar is brilliant
Body pipe (IGBT, Insulated Gate Bipolar Transistor) or metal-oxide half field effect transistor (MOSFET)；Wherein,
The anode of the collector of the first switch device S1, third switching device S3 and the 5th switching device S5 and the DC power supply
Connection；The transmitter of the first switch device S1, third switching device S3 and the 5th switching device S5 respectively with second switch
The collector of device S2, the 4th switching device S4 and the 6th switching device S6 connect, the second switch device S2, the 4th switch
The transmitter of device S4 and the 6th switching device S6 ground connection.
In the present embodiment, the signal to be detected is the lower bridge arm second switch device of first inverter bridge leg 111
The of the 4th both ends switching device S4 of lower bridge arm of the voltage signal to be detected of the first of the both ends S2, second inverter bridge leg 112
The third at the 6th both ends switching device S6 of lower bridge arm of two voltage signals to be detected, and/or the third inverter bridge leg 113 is to be checked
Survey voltage signal.
With continued reference to Fig. 2, the detection module 12 includes: first detection unit 121, second detection unit 122 and third
Detection unit 123.
Wherein, the input terminal of the first detection unit 121 is connected to the midpoint of first inverter bridge leg 111, is used for
Draw the described first voltage signal to be detected.
The input terminal of the second detection unit 122 is connected to the midpoint of second inverter bridge leg 112, for drawing
State the second voltage signal to be detected.
The input terminal of the third detection unit 123 is connected to the midpoint of the third inverter bridge leg 113, for drawing
State third voltage signal to be detected.
Specifically, the first detection unit 121 includes first diode D1, first capacitor C1, first resistor R1, second
Resistance R2,3rd resistor R3, the 4th resistance R4 and first comparator COP1.
Wherein, the negative pole end of the first diode D1 receives the first voltage signal to be detected, the first diode D1
Positive terminal and one end of first resistor R1, one end of first capacitor C1, first comparator non-inverting input terminal V1PIt is connected；Institute
The other end for stating first resistor R1 is connected with control power supply VCC；The other end of the first capacitor C1 is connected with control power ground；
One end and the one end the 3rd resistor R3, first comparator COP1 inverting input terminal V1 of the second resistance R2NIt is connected；It is described
The other end of second resistance R2 is connected with control power supply VCC；The other end of the 3rd resistor R3 is connected with control power ground；Institute
The output end for stating first comparator COP1 is connected with one end of the 4th resistance R4, and detected as the first detection unit
Signal V1OOutput end；The other end of the 4th resistance R4 is connected with control power supply VCC.In the present embodiment, by described
First detection unit signal V1 detectedO, obtain the first inverter bridge leg load current iuDirection.
The second detection unit 122 include the second diode D2, the second capacitor C2, the 5th resistance R5, the 6th resistance R6,
7th resistance R7, the 8th resistance R8 and the second comparator COP2.
Wherein, the negative pole end of the second diode D2 receives the second voltage signal to be detected, the second diode D2
Positive terminal and one end of the 5th resistance R5, one end of the second capacitor C2, the second comparator COP2 non-inverting input terminal V2PPhase
Even；The other end of the 5th resistance R5 is connected with control power supply VCC；The other end and control power ground of the second capacitor C2
It is connected；One end of the 6th resistance R6 and one end, the second comparator COP2 inverting input terminal V2 of the 7th resistance R7NPhase
Even；The other end of the 6th resistance R6 is connected with control power supply VCC；The other end and control power ground of the 7th resistance R7
It is connected；The output end of the second comparator COP2 is connected with one end of the 8th resistance R8, and as second inspection
Survey unit signal V2 detectedOOutput end；The other end of the 8th resistance R8 is connected with control power supply VCC.In this reality
It applies in example, passes through second detection unit signal V2 detectedO, obtain the direction of the second inverter bridge leg load current iv.
The third detection unit 123 includes third diode D3, third capacitor C3, the 9th resistance R9, the tenth resistance
R10, eleventh resistor R11, twelfth resistor R12 and third comparator COP3；The negative pole end of the third diode D3 receives
One end of third voltage signal to be detected, the positive terminal of the third diode D3 and the 9th resistance R9, third capacitor C3 one
It holds, the non-inverting input terminal V3 of third comparator COP3PIt is connected；The other end of the 9th resistance R9 is connected with control power supply VCC；
The other end of the third capacitor C3 is connected with control power ground；One end of the tenth resistance R10 and the 11 resistance R11
One end, third comparator COP3 inverting input terminal V3NIt is connected；The other end of the tenth resistance R10 and control power supply VCC phase
Even；The other end of the eleventh resistor R11 is connected with control power ground；The third comparator COP3 output end and the tenth
One end of two resistance R12 is connected, and as third detection unit signal V3 detectedOOutput end；Described 12nd
The other end of resistance R12 is connected with control power supply VCC.In the present embodiment, pass through the san detection unit letter detected
Number V3O, obtain third inverter bridge leg load current iwDirection.
In embodiment, described first form unit 121 is detected by signal V1 detectedOIt is converted to obtain high/low electricity
Ordinary mail number, described second detects form unit 122 for signal V2 detectedOConverted to obtain high/low level signal, described
Three detect form units 123 for signal V3 detectedOIt is converted to obtain high/low level signal.
The sampling module 13 for acquiring detection module signal detected at the specified time point, according to the signal
Obtain corresponding load current direction.As shown in Fig. 2, the acquisition module 13 includes: the acquisition of the first acquisition unit 131, second
Unit 132 and third acquisition unit 133.
First acquisition unit 131 is used to acquire the high/low level letter of first detection unit signal detected
Number, to determine the first inverter bridge leg load current iuDirection.Referring to Fig. 3, being shown as each signal in current detection circuit
Waveform diagram.
Wherein, Vsp: switching tube forward conduction voltage drop
Vsn: switching tube reverse-conducting pressure drop；
V1p: comparator forward direction pin voltage；
V1n: comparator negative sense pin voltage
Δ d: dead time；
Vd: detection circuit diode conduction voltage drop；
VCC: control supply voltage.
Second acquisition unit 132 is used to acquire the high/low level letter of second detection unit signal detected
Number, to determine the second inverter bridge leg load current ivDirection；
The third acquisition unit 133 is used to acquire the high/low level letter of the third detection unit signal detected
Number, to determine third inverter bridge leg load current iwDirection.
The specified time point is at the midpoint of the conversion module turn-on time.Specifically, the sampling module
Intermediate time is connected in first inverter bridge leg 111, the second inverter bridge leg 112 and third inverter bridge leg 113, is adopted by pin
After collecting the low and high level received, low level indicates that load current direction is positive, and high level indicates that load direction is negative.
In the present embodiment, first acquisition unit 131, second acquisition unit 132, the third acquisition unit
133 are all made of digital signal processor (DSP, Digital Signal Process).
The present embodiment also provides a kind of chip, and the chip includes the detection circuit in above-mentioned load current direction.
The present embodiment also provides a kind of electronic equipment, and the electronic equipment includes the chip.
Embodiment two
The present embodiment provides a kind of detection methods in load current direction, referring to Fig. 4, being shown as load current direction
Flow diagram of the detection method in an embodiment.As shown in figure 4, the detection method in the load current direction includes following
Step:
S41 converts the electric signal of an input, and the electric signal after conversion is drawn, to form signal to be detected；
Specifically, the electric signal of input is d. c. voltage signal, and d. c. voltage signal is converted to ac voltage signal.
S42 detects the signal to be detected；
S43 acquires detection module signal detected at the specified time point, is loaded accordingly according to the signal acquisition
Current direction.In the present embodiment, at the midpoint for the conversion module turn-on time.
In conclusion the offer of the detection circuit/method in load current direction of the present invention, chip, electronic equipment finishes
Structure ball bearing made, programming are simple, few and at low cost using number of devices, are suitable for large-scale business application.The present invention
It effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (15)
1. a kind of detection circuit in load current direction, which is characterized in that the detection circuit in the load current direction includes:
Conversion module, the electric signal for exporting to a power module are converted, and the electric signal after conversion is drawn, with shape
At signal to be detected；
Detection module, for being detected to the signal to be detected；
Sampling module, it is corresponding according to the signal acquisition for acquiring detection module signal detected at the specified time point
Load current direction.
2. the detection circuit in load current direction according to claim 1, which is characterized in that
The power module is a DC power supply；
The conversion module includes the first inverter bridge leg, the second inverter bridge leg and third inverter bridge leg being connected in parallel；
One end of first inverter bridge leg, the second inverter bridge leg and third inverter bridge leg is being connected to the DC power supply just
Pole, the other end of first inverter bridge leg, the second inverter bridge leg and third inverter bridge leg are connected to the negative of the DC power supply
Pole.
3. the detection circuit in load current direction according to claim 2, which is characterized in that
First inverter bridge leg is made of first switch device and second switch devices in series；
Second inverter bridge leg is composed in series by third switching device and the 4th switching device；
The third inverter bridge leg is composed in series by the 5th switching device and the 6th switching device.
4. the detection circuit in load current direction according to claim 3, which is characterized in that the first switch device,
Second switch device, third switching device, the 4th switching device, the 5th switching device and the 6th switching device are all made of to have and open
Close the semiconductor devices of function；Wherein, the collector of the first switch device, third switching device and the 5th switching device with
The anode connection of the DC power supply；The transmitter of the first switch device, third switching device and the 5th switching device point
It is not connect with the collector of second switch device, the 4th switching device and the 6th switching device, the second switch device, the 4th
The emitter of switching device and the 6th switching device ground connection.
5. the detection circuit in load current direction according to claim 3, which is characterized in that
The signal to be detected is first voltage to be detected at the lower bridge arm second switch device both ends of first inverter bridge leg
Second voltage signal to be detected at the 4th switching device both ends of lower bridge arm of signal, second inverter bridge leg, and/or described
The third voltage signal to be detected at the 6th switching device both ends of lower bridge arm of three inverter bridge legs.
6. the detection circuit in load current direction according to claim 5, which is characterized in that the detection module includes:
First detection unit, input terminal is connected to the midpoint of first inverter bridge leg, to be detected for drawing described first
Voltage signal；
Second detection unit, input terminal is connected to the midpoint of second inverter bridge leg, to be detected for drawing described second
Voltage signal；
Third detection unit, input terminal is connected to the midpoint of the third inverter bridge leg, to be detected for drawing the third
Voltage signal.
7. the detection circuit in load current direction according to claim 5, which is characterized in that
The first detection unit includes first diode, first capacitor, first resistor, second resistance, 3rd resistor R3, the 4th
Resistance and first comparator；
Wherein, the negative pole end of the first diode receives the first voltage signal to be detected, the positive terminal of the first diode
It is connected with the non-inverting input terminal of one end of first resistor, one end of first capacitor, first comparator；
The other end of the first resistor is connected with control power supply；
The other end of the first capacitor is connected with control power ground；
One end of the second resistance is connected with described 3rd resistor one end, first comparator inverting input terminal；Second electricity
The other end of resistance is connected with control power supply；The other end of the 3rd resistor is connected with control power ground；
The output end of the first comparator is connected with one end of the 4th resistance, and detected as the first detection unit
The output end of signal；The other end of 4th resistance is connected with control power supply.
8. the detection circuit in load current direction according to claim 7, which is characterized in that
The second detection unit includes the second diode, the second capacitor, the 5th resistance, the 6th resistance, the 7th resistance, the 8th electricity
Resistance and the second comparator；
Wherein, the negative pole end of second diode receives the second voltage signal to be detected, the positive terminal of second diode
It is connected with the non-inverting input terminal of one end of the 5th resistance, one end of the second capacitor, the second comparator；
The other end of 5th resistance is connected with control power supply；
The other end of second capacitor is connected with control power ground；
One end of 6th resistance is connected with one end of the 7th resistance, the second comparator inverting input terminal；Described 6th
The other end of resistance is connected with control power supply；The other end of 7th resistance is connected with control power ground；
The output end of second comparator is connected with one end of the 8th resistance, and is examined as the second detection unit
The output end of the signal of survey；The other end of 8th resistance is connected with control power supply.
9. the detection circuit in load current direction according to claim 8, which is characterized in that
The third detection unit includes third diode, third capacitor, the 9th resistance, the tenth resistance, eleventh resistor, the tenth
Two resistance and third comparator；
The negative pole end of the third diode D3 receives third voltage signal to be detected, the positive terminal of the third diode and the
One end of nine resistance, one end of third capacitor, the non-inverting input terminal of third comparator are connected；
The other end of 9th resistance is connected with control power supply；
The other end of the third capacitor is connected with control power ground；
One end of tenth resistance is connected with one end of 11 resistance, third comparator inverting input terminal；Described tenth
The other end of resistance is connected with control power supply；The other end of the eleventh resistor is connected with control power ground；
The third comparator output terminal is connected with one end of twelfth resistor, and detected as the third detection unit
The output end of signal；The other end of the twelfth resistor is connected with control power supply.
10. the detection circuit in load current direction according to claim 9, which is characterized in that the acquisition module includes:
First acquisition unit, for acquiring the high/low level signal of first detection unit signal detected；
Second acquisition unit, for acquiring the high/low level signal of second detection unit signal detected；
Third acquisition unit, for acquiring the high/low level signal of the third detection unit signal detected.
11. the detection circuit in load current direction according to claim 10, which is characterized in that the specified time point is
At the midpoint of the conversion module turn-on time.
12. the detection circuit in load current direction according to claim 9, which is characterized in that first acquisition unit,
Second acquisition unit, the third acquisition unit are all made of digital signal processor.
13. a kind of chip, it is characterised in that: the chip includes such as load current side of any of claims 1-12
To detection circuit.
14. a kind of electronic equipment, it is characterised in that: the electronic equipment includes 13 chips of power.
15. a kind of detection method in load current direction, it is characterised in that: the detection method in the load current direction includes:
The electric signal of one input is converted, and the electric signal after conversion is drawn, to form signal to be detected；
The signal to be detected is detected；
Detection module signal detected is acquired at the specified time point, according to the corresponding load current side of the signal acquisition
To.
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| CN201811580299.7A CN109507471A (en) | 2018-12-24 | 2018-12-24 | Detection circuit/the method in load current direction, chip, electronic equipment |
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| CN201811580299.7A CN109507471A (en) | 2018-12-24 | 2018-12-24 | Detection circuit/the method in load current direction, chip, electronic equipment |
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| CN109507471A true CN109507471A (en) | 2019-03-22 |
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| CN201811580299.7A Pending CN109507471A (en) | 2018-12-24 | 2018-12-24 | Detection circuit/the method in load current direction, chip, electronic equipment |
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