CN205484721U - High -efficient eddy current dynamometer system based on constant current source source - Google Patents
High -efficient eddy current dynamometer system based on constant current source source Download PDFInfo
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- CN205484721U CN205484721U CN201620169782.6U CN201620169782U CN205484721U CN 205484721 U CN205484721 U CN 205484721U CN 201620169782 U CN201620169782 U CN 201620169782U CN 205484721 U CN205484721 U CN 205484721U
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Abstract
The utility model discloses a high -efficient eddy current dynamometer system based on constant current source source, it includes the singlechip, the display that is connected with the singlechip respectively, a signal control unit, power analyzer and keyboard, the eddy current loader who is connected with signal control unit respectively and the machine controller that awaits measuring, the thermostatic control ware that is connected with eddy current loader, the signal converting unit who is connected with the power analyzer, the signal collector who is connected with signal converting unit, and the motor that awaits measuring that is connected with signal collector, the motor that awaits measuring still is connected with the machine controller that awaits measuring with eddy current loader respectively, its characterized in that: still including the constant current the control unit who is connected with the machine controller that awaits measuring, the utility model discloses possess invariable operating current, therefore its influence that can not receive the fluctuation of current, its stability improved.
Description
Technical field
This utility model relates to a kind of detecting system, specifically refers to a kind of efficient electric whirlpool based on constant current source
Stream power-measuring system.
Background technology
The Main Means of the test electronic performance of electric automobile is that the equipment utilizing test traditional combustion engine has come at present
Become the tests such as loading, utilize the detection equipment such as voltmeter and ammeter to carry out the Data Detection of electrical quantity, examine
Process and the analysis of data is carried out again after having surveyed.And the test of the test of power driven system and conventional engines is deposited
In larger difference, what traditional combustion engine predominantly detected is the characteristics such as rotating speed and the moment of torsion of motor, the merit of its correspondence
The parameters such as rate factor, line voltage, line current, active power cannot directly obtain in calculating, and utilizes voltage
The detection equipment Inspection poor real such as table and ammeter, it is impossible to Real-time Collection is to the comprehensive parameters of institute's survey internal combustion engine
And show.Power driven system more focuses on is various electrical parameters in detection, and data are processed real-time
Property requires the highest, and the process to the complicated signal of telecommunication just requires to use increasingly complex instrumentation to be acquired
And analysis.And there is no this most more scientific the most professional special test equipment on current market and complete
The test of power driven system.
Utility model content
The purpose of this utility model be to overcome traditional combustion engine detecting system cannot Real-time Collection to surveyed internal combustion
The defect of the comprehensive parameters of machine, it is provided that a kind of efficient eddy current dynamometric system based on constant current source.
The purpose of this utility model is achieved through the following technical solutions: a kind of efficient electric based on constant current source
Eddy current power-measuring system, it includes single-chip microcomputer, the display that is connected with single-chip microcomputer respectively, signaling control unit,
Power analyzer and keyboard, the current vortex loader being connected with signaling control unit respectively and treat measured motor
Controller, the radiator valve being connected with current vortex loader, the signal being connected with power analyzer turns
Change unit, the signal picker being connected with signal conversion unit, and treating of being connected with signal picker
Measured motor；Described treat that measured motor is connected with current vortex loader and electric machine controller to be measured the most respectively；In order to
Preferably implementing this utility model, this utility model also includes the constant current being connected with electric machine controller to be measured
Control unit.
Further, described constant-current control unit, by transformator T, processes chip U1, audion VT4, one
End is connected with the Same Name of Ends of the former limit inductance coil of transformator T, the other end is then electric with the former limit of transformator T
The non-same polarity of sense coil forms the inductance L1 of the input of this constant-current control unit together, is serially connected in transformator
Resistance R9 between Same Name of Ends and the FB pin processing chip U1 of the secondary inductance coil of T, one end and place
Reason chip U1 FB pin be connected, the other end then after resistance R11 with process chip U1 COMP
The resistance R10 that pin is connected, positive pole with process chip U1 BIAS pin be connected, negative pole then with electricity
The electric capacity C7 that the junction point of resistance R11 and resistance R10 is connected, positive pole and the VDD pipe processing chip U1
The electric capacity C6 that foot is connected, negative pole then junction point with resistance R11 and resistance R10 is connected, is serially connected in three
Resistance R15 between colelctor electrode and the OUT pin processing chip U1 of pole pipe VT4, positive pole and process core
The CS pin of sheet U1 is connected, negative pole then forms this current constant control list together with the colelctor electrode of audion VT4
The polar capacitor C8 of outfan of unit, and be serially connected in the secondary inductance coil of transformator T non-same polarity and
Process the voltage stabilizing power supplying circuit composition between the VCC pin of chip U1；The base stage of described audion VT4 with
The GND pin of process chip U1 is connected, its grounded emitter；The outfan of described constant-current control unit
Then it is connected with electric machine controller to be measured.
Described voltage stabilizing power supplying circuit by audion VT3, P pole after resistance R12 with the secondary of transformator T
The diode D3 that the non-same polarity of inductance coil is connected, N pole then emitter stage with audion VT3 is connected,
N pole is connected with the base stage of audion VT3, the Zener diode D4 of P pole ground connection, positive pole and audion
The polar capacitor C9 that the emitter stage of VT3 is connected, negative pole is then connected with the P pole of Zener diode D4,
It is serially connected in the resistance R13 between emitter stage and the base stage of audion VT3, and one end is with audion VT3's
The resistance R14 composition that colelctor electrode is connected, the other end is then connected with the VCC pin processing chip U1.
Described signal conversion unit is by conversion chip U, resistance R3, resistance R4, diode D1, electric capacity
C3, input circuit, output circuit and buffer circuit composition；One end of described resistance R4 and conversion chip U
INPUT pin be connected, its other end is then connected with input circuit after resistance R3；Diode D1
P pole be connected with the junction point of resistance R3 and resistance R4, its N pole ground connection；The negative pole of electric capacity C3 with
The VS pin of conversion chip U is connected, its positive pole then connects 15V voltage；Described input circuit, output electricity
Road and buffer circuit are all connected with conversion chip U.
Described input circuit by amplifier P, audion VT1, negative pole is connected with the positive pole of amplifier P,
The electric capacity C1 of plus earth, the resistance R1 being in parallel with electric capacity C1, one end is connected with the negative pole of amplifier P
Connect, the other end then forms the resistance R2 of input of this signal conversion unit, and positive pole and audion VT1
The electric capacity C2 that emitter stage is connected, negative pole is then connected with the OUTPUT pin of conversion chip U composition；
The outfan of described amplifier P is sequentially managed with the INPUT of conversion chip U after resistance R3 and resistance R4
Foot is connected；The colelctor electrode of described audion VT1 is connected with the outfan of amplifier P, its base stage then with
The A/C pin of conversion chip U is connected；The GND pin ground connection of described conversion chip U；Described signal
The input of converting unit is connected with signal picker.
Described buffer circuit includes resistance R5, resistance R6 and electric capacity C5；The positive pole of described electric capacity C5
Be connected with the THR pin of conversion chip U, its minus earth；One end of resistance R6 is with electric capacity C5's
Negative pole is connected, its other end then after resistance R5 OUTPUT pin with conversion chip U be connected；
The THR pin of described conversion chip U also junction point with resistance R5 and resistance R6 is connected.
Described output circuit includes audion VT2, diode D2, electric capacity C4, resistance R7 and resistance
R8；The positive pole of described electric capacity C4 is connected with the FOUT pin of conversion chip U, its negative pole then with three poles
The colelctor electrode of pipe VT2 is connected, the CUAREN pipe of the P pole of described diode D2 and conversion chip U
Foot is connected, its N pole then base stage with audion VT2 is connected, one end of described resistance R7 and conversion
The CUAREN pin of chip U is connected, its other end then ground connection after resistance R8；Described audion
The colelctor electrode of VT2 forms the outfan of this signal conversion unit, its emitter stage then with resistance R7 and resistance R8
Junction point be connected；The outfan of described signal conversion unit is connected with the signal input part of power analyzer
Connect.
In order to reach preferably to test effect, described conversion chip U is preferably the integrated chip of LM331, and locates
Reason chip U1 the most preferentially selects the integrated chip of AP3706 to realize.
This utility model compared with the prior art, has the following advantages and beneficial effect:
(1) this utility model data sampling speed is fast, and data-handling capacity is powerful, it is ensured that all electrical quantitys
Precision and the reliability of data and promptness.
(2) this utility model can effectively avoid temperature drift, it is ensured that the precision that torque data is measured.
(3) this utility model has constant operating current, and therefore it will not be affected by current fluctuation,
Improve its stability.
Accompanying drawing explanation
Fig. 1 is overall structure block diagram of the present utility model.
Fig. 2 is signal conversion unit circuit structure diagram of the present utility model.
Fig. 3 is constant-current control unit circuit structure diagram of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described in further detail, but enforcement of the present utility model
Mode is not limited to this.
Embodiment
As it is shown in figure 1, efficient eddy current dynamometric system based on constant current source of the present utility model, its bag
Include and treat measured motor, electric machine controller to be measured, current vortex loader, signaling control unit, radiator valve,
Single-chip microcomputer, signal picker, signal conversion unit, constant-current control unit, power analyzer, display with
And keyboard 12 part.
Wherein, constant-current control unit connects 220V civil power, and it is for providing a system to constant operating current.Treat
Measured motor controller is then connected with constant-current control unit, electric machine controller to be measured the most also with treat measured motor phase
It is connected to control to treat rotating speed and the start and stop of measured motor.Current vortex loader then passes through shaft coupling and treats measured motor
Being connected, it is for being treated that measured motor loads.Signaling control unit the most respectively with electric machine controller to be measured
Being connected with current vortex loader, it can treat measured motor controller and current vortex loader sends and controls letter
Number, such that it is able to they are controlled.
This single-chip microcomputer, keyboard and display are then as human-computer exchange window, and this single-chip microcomputer preferentially uses
AT89C51 type single-chip microcomputer realizes.This display then P3.1 pin with AT89C51 type single-chip microcomputer is connected,
It treats the parameters of measured motor for display.Keyboard then P3.4 pin with AT89C51 type single-chip microcomputer is connected
Connecing, it is used for inputting control instruction.
Treat the parameters signal of measured motor it addition, single-chip microcomputer can also receive and treat measured motor and electricity whirlpool
Stream loader is controlled, and therefore its P2.0 pin needs to be connected with signaling control unit, and its P3.0 pipe
Foot is then connected with power analyzer.When measured motor treated by needs or current vortex loader is controlled, survey
Examination personnel only need to input control signal to single-chip microcomputer from keyboard, and single-chip microcomputer is transferred to signal signal and controls single
Unit, control signal is then identified by signaling control unit, classify after be sent respectively to electric machine controller to be measured
With current vortex loader；Therefore, can control to treat measured motor perseverance rotating speed, current vortex loader by single-chip microcomputer
Permanent rotating speed, current vortex loader perseverance moment of torsion isotype.
Being acquired to treat measured motor parameter in various patterns, this signal picker need to be with electricity to be measured
Machine is connected；Signal conversion unit is then connected with signal picker, and it is for being adopted signal picker
Collect to torque signal be converted to digital electric signal；Power analyzer needs to be connected with signal conversion unit,
It calculates the time real power be sent to single-chip microcomputer until measured motor by the digital electric signal of change.This signal
Harvester can select strain-type torque sensor to realize；Japan then can preferentially be selected by power analyzer
The WT3000 type power analyzer that Yokogawa electromechanics science and technology produces realizes, at these model power analyzer data
Reason ability is powerful, corresponding speed fast, can well guarantee to test reliability and the promptness of data.It addition,
This radiator valve needs to be connected with current vortex loader, its can the temperature drift of appearance in elimination system,
The measuring accuracy of raising system.This electric machine controller to be measured, radiator valve, current vortex loader and letter
Number control unit all uses existing technology to realize.
In order to improve the conversion efficiency of torque signal, the structure of described signal conversion unit as in figure 2 it is shown,
It is by conversion chip U, resistance R3, resistance R4, diode D1, electric capacity C3, input circuit, output electricity
Road and buffer circuit composition.
During connection, one end of described resistance R4 is connected with the INPUT pin of conversion chip U, the other end
Then it is connected with input circuit after resistance R3.The P pole of diode D1 and resistance R3 and the company of resistance R4
Contact is connected, its N pole ground connection.
In order to provide running voltage, the negative pole of this electric capacity C3 and the VS of conversion chip U to conversion chip U
Pin is connected, its positive pole then connects 15V voltage.Described input circuit, output circuit and buffer circuit are equal
It is connected with conversion chip U.In order to reach more preferable implementation result, this conversion chip U preferentially selects LM331
Integrated chip realizes.
It addition, described input circuit is by amplifier P, audion VT1, the positive pole phase of negative pole and amplifier P
Connection, the electric capacity C1 of plus earth, the resistance R1 being in parallel with electric capacity C1, one end is negative with amplifier P's
Pole is connected, the other end then forms the resistance R2 of input of this signal conversion unit, and positive pole and three poles
The electric capacity that the emitter stage of pipe VT1 is connected, negative pole is then connected with the OUTPUT pin of conversion chip U
C2 forms.The outfan of described amplifier P sequentially after resistance R3 and resistance R4 with conversion chip U's
INPUT pin is connected.The colelctor electrode of described audion VT1 is connected with the outfan of amplifier P, its
Base stage is then connected with the A/C pin of conversion chip U；The input of described signal conversion unit is adopted with signal
Storage is connected.By said structure, this electric capacity C1, resistance R1, resistance R2, amplifier P and three
Pole pipe VT1 constitutes an integrator, and electric capacity C2 is then integrating capacitor, can by integrator and integrating capacitor
So that the A/C pin of conversion chip U and OUTPUT pin keep electronegative potential, therefore conversion chip U
Voltage remains constant, thus can improve the linearity of signal conversion.
Described buffer circuit then includes resistance R5, resistance R6 and electric capacity C5.Described electric capacity C5 is just
Pole is connected with the THR pin of conversion chip U, its minus earth.One end of resistance R6 and electric capacity C5
Negative pole be connected, its other end then after resistance R5 OUTPUT pin with conversion chip U be connected.
The THR pin of described conversion chip U also junction point with resistance R5 and resistance R6 is connected.Described turn
Change the GND pin ground connection of chip U.
This output circuit includes audion VT2, diode D2, electric capacity C4, resistance R7 and resistance R8.
Wherein, the positive pole of electric capacity C4 be connected with the FOUT pin of conversion chip U, its negative pole then with audion
The colelctor electrode of VT2 is connected.The P pole of diode D2 is then connected with the CUAREN pin of conversion chip U
Connect, its N pole then base stage with audion VT2 is connected.One end of described resistance R7 and conversion chip U
CUAREN pin be connected, its other end then ground connection after resistance R8.The collection of described audion VT2
Electrode forms the outfan of this signal conversion unit and is connected with power analyzer, and this audion VT2 sends out
Emitter-base bandgap grading then junction point with resistance R7 and resistance R8 is connected.
The structure of this constant-current control unit, as it is shown on figure 3, it includes transformator T, processes chip U1, three poles
Pipe VT4, inductance L1, resistance R9, resistance R10, resistance R11, resistance R15, electric capacity C6, electric capacity
C7, polar capacitor C8, and voltage stabilizing power supplying circuit composition.
Described voltage stabilizing power supplying circuit is for processing the running voltage that chip U1 provides stable, and it is by audion
VT3, P pole non-same polarity of secondary inductance coil with transformator T after resistance R12 is connected, N pole then
Diode D3, the N pole being connected with the emitter stage of audion VT3 is connected with the base stage of audion VT3,
The Zener diode D4 of P pole ground connection, positive pole is connected with the emitter stage of audion VT3, negative pole then with voltage stabilizing
The polar capacitor C9 that the P pole of diode D4 is connected, be serially connected in the emitter stage of audion VT3 and base stage it
Between resistance R13, and one end is connected with the colelctor electrode of audion VT3, the other end then with process chip
The resistance R14 composition that the VCC pin of U1 is connected.
It addition, one end of inductance L1 is connected with the Same Name of Ends of the former limit inductance coil of transformator T, its another
End then connects 220V civil power together with the non-same polarity of the former limit inductance coil of transformator T, and resistance R9 is serially connected in
Between Same Name of Ends and the FB pin processing chip U1 of the secondary inductance coil of transformator T, resistance R10's
One end with process chip U1 FB pin be connected, its other end then after resistance R11 with process chip
The COMP pin of U1 is connected, the positive pole of electric capacity C7 with process chip U1 BIAS pin be connected,
Its negative pole then junction point with resistance R11 and resistance R10 is connected, the positive pole of electric capacity C6 with process chip
The VDD pin of U1 is connected, its negative pole then junction point with resistance R11 and resistance R10 is connected, electricity
Resistance R15 is then serially connected between the colelctor electrode of audion VT4 and the OUT pin processing chip U1, polarity electricity
The CS pin of the positive pole and process chip U1 that hold C8 is connected, its negative pole then with the current collection of audion VT4
Pole forms the outfan of this constant-current control unit together and is connected with electric machine controller to be measured.Described audion
The base stage of VT4 is connected with the GND pin processing chip U1, its grounded emitter.In order to reach more preferable
Implementation result, this process chip U1 preferentially selects the integrated chip of AP3706 to realize.
As it has been described above, just can well implement this utility model.
Claims (8)
1. an efficient eddy current dynamometric system based on constant current source, it includes single-chip microcomputer, respectively with list
Display, signaling control unit, power analyzer and the keyboard that sheet machine is connected, respectively with signal control
Current vortex loader that unit is connected and electric machine controller to be measured, the constant temperature being connected with current vortex loader
Controller, the signal conversion unit being connected with power analyzer, the signal being connected with signal conversion unit
Harvester, and be connected with signal picker treat measured motor；Described treat measured motor the most respectively with current vortex
Loader is connected with electric machine controller to be measured；It is characterized in that: also include and electric machine controller phase to be measured
The constant-current control unit connected；
Described constant-current control unit, by transformator T, processes chip U1, audion VT4, one end and transformator
The Same Name of Ends of the former limit inductance coil of T is connected, the other end then non-with the former limit inductance coil of transformator T
Same Name of Ends forms the inductance L1 of the input of this constant-current control unit together, is serially connected in the secondary electricity of transformator T
Resistance R9 between Same Name of Ends and the FB pin processing chip U1 of sense coil, one end and process chip U1
FB pin be connected, the other end then after resistance R11 with process chip U1 COMP pin be connected
Resistance R10, positive pole with process chip U1 BIAS pin be connected, negative pole then with resistance R11 and electricity
The electric capacity C7 that is connected of junction point of resistance R10, positive pole is connected with the VDD pin of process chip U1,
The electric capacity C6 that negative pole then junction point with resistance R11 and resistance R10 is connected, is serially connected in audion VT4
Colelctor electrode and the OUT pin processing chip U1 between resistance R15, positive pole with process chip U1
CS pin is connected, negative pole then forms the output of this constant-current control unit together with the colelctor electrode of audion VT4
The polar capacitor C8 of end, and be serially connected in the non-same polarity of the secondary inductance coil of transformator T and process chip
Voltage stabilizing power supplying circuit composition between the VCC pin of U1；The base stage of described audion VT4 and process chip
The GND pin of U1 is connected, its grounded emitter；The outfan of described constant-current control unit is then with to be measured
Electric machine controller is connected.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 1, its
Be characterised by: described voltage stabilizing power supplying circuit by audion VT3, P pole after resistance R12 with transformator T
The non-same polarity of secondary inductance coil be connected, N pole then emitter stage with audion VT3 is connected two
Pole pipe D3, N pole is connected with the base stage of audion VT3, the Zener diode D4 of P pole ground connection, positive pole
Be connected with the emitter stage of audion VT3, polarity that negative pole is then connected with the P pole of Zener diode D4
Electric capacity C9, is serially connected in the resistance R13 between emitter stage and the base stage of audion VT3, and one end and three poles
The resistance that the colelctor electrode of pipe VT3 is connected, the other end is then connected with the VCC pin processing chip U1
R14 forms.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 2, its
Be characterised by: described signal conversion unit by conversion chip U, resistance R3, resistance R4, diode D1,
Electric capacity C3, input circuit, output circuit and buffer circuit composition；One end of described resistance R4 and conversion
The INPUT pin of chip U is connected, its other end is then connected with input circuit after resistance R3；Two
The P pole of pole pipe D1 is connected with the junction point of resistance R3 and resistance R4, its N pole ground connection；Electric capacity C3
Negative pole be connected with the VS pin of conversion chip U, its positive pole then connects 15V voltage；Described input circuit,
Output circuit and buffer circuit are all connected with conversion chip U.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 3, its
Be characterised by: described input circuit by amplifier P, audion VT1, the positive pole phase of negative pole and amplifier P
Connection, the electric capacity C1 of plus earth, the resistance R1 being in parallel with electric capacity C1, one end is negative with amplifier P's
Pole is connected, the other end then forms the resistance R2 of input of this signal conversion unit, and positive pole and three poles
The electric capacity that the emitter stage of pipe VT1 is connected, negative pole is then connected with the OUTPUT pin of conversion chip U
C2 forms；The outfan of described amplifier P sequentially after resistance R3 and resistance R4 with conversion chip U's
INPUT pin is connected；The colelctor electrode of described audion VT1 is connected with the outfan of amplifier P, its
Base stage is then connected with the A/C pin of conversion chip U；The GND pin ground connection of described conversion chip U；
The input of described signal conversion unit is connected with signal picker.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 4, its
It is characterised by: described buffer circuit includes resistance R5, resistance R6 and electric capacity C5；Described electric capacity C5
Positive pole be connected with the THR pin of conversion chip U, its minus earth；One end of resistance R6 and electric capacity
The negative pole of C5 is connected, its other end then after resistance R5 OUTPUT pin with conversion chip U be connected
Connect；The THR pin of described conversion chip U also junction point with resistance R5 and resistance R6 is connected.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 5, its
Be characterised by: described output circuit include audion VT2, diode D2, electric capacity C4, resistance R7 and
Resistance R8；The positive pole of described electric capacity C4 is connected with the FOUT pin of conversion chip U, its negative pole then with
The colelctor electrode of audion VT2 is connected, the P pole of described diode D2 and the CUAREN of conversion chip U
Pin is connected, its N pole then base stage with audion VT2 is connected, one end of described resistance R7 with turn
The CUAREN pin changing chip U is connected, its other end then ground connection after resistance R8；Described audion
The colelctor electrode of VT2 forms the outfan of this signal conversion unit, its emitter stage then with resistance R7 and resistance R8
Junction point be connected；The outfan of described signal conversion unit is connected with the signal input part of power analyzer
Connect.
A kind of efficient eddy current dynamometric system based on constant current source the most according to claim 6, its
It is characterised by: described conversion chip U is the integrated chip of LM331.
8. survey according to a kind of based on constant current source the efficient electric eddy current described in any one of claim 1～6
Merit system, it is characterised in that: described process chip U1 is the integrated chip of AP3706.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015206806632 | 2015-09-06 | ||
| CN201520680663 | 2015-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205484721U true CN205484721U (en) | 2016-08-17 |
Family
ID=56658291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620169782.6U Expired - Fee Related CN205484721U (en) | 2015-09-06 | 2016-03-04 | High -efficient eddy current dynamometer system based on constant current source source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205484721U (en) |
-
2016
- 2016-03-04 CN CN201620169782.6U patent/CN205484721U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20170304 |