CN105277756A - Testing rotating speed automatic adjustment type motor test system on the basis of voltage detection - Google Patents
Testing rotating speed automatic adjustment type motor test system on the basis of voltage detection Download PDFInfo
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- CN105277756A CN105277756A CN201510818848.XA CN201510818848A CN105277756A CN 105277756 A CN105277756 A CN 105277756A CN 201510818848 A CN201510818848 A CN 201510818848A CN 105277756 A CN105277756 A CN 105277756A
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Abstract
The present invention discloses a testing rotating speed automatic adjustment type motor test system on the basis of voltage detection. The testing rotating speed automatic adjustment type motor test system comprises a single chip microcomputer, a rotating speed signal acquisition unit, a variable frequency motor control unit, an output display unit, an operation unit which are connected with the single chip microcomputer, a tested motor connected with the rotating speed signal acquisition unit, a variable frequency motor connected with the tested motor, an overvoltage protection unit connected with the variable frequency motor, and a power supply connected with the overvoltage protection unit. The variable frequency motor is connected with the variable frequency motor control unit. The testing rotating speed automatic adjustment type motor test system on the basis of voltage detection is provided with the overvoltage protection unit which is configured to detect the working voltages of the tested motor and the variable frequency motor. When the voltage is too high, the working power supply of the tested motor and the variable frequency motor may be cut off by the overvoltage protection unit so that the tested motor and the variable frequency motor cannot be damaged by overvoltage.
Description
Technical field
The present invention relates to a kind of Motor Measuring System, specifically refer to a kind of test rotating speed automatic adjustment Motor Measuring System based on voltage detecting.
Background technology
Along with national economy and scientific and technical development, the effect that motor plays in all trades and professions is more and more important.Meanwhile, along with the development of every profession and trade, propose more and more higher requirement to motor product, therefore motor product all needs to verify whether its characteristic reaches application requirement by some pilot projects before dispatching from the factory.Motor Measuring Technology has considerable meaning for the performance verification of motor.But traditional Motor Measuring System does not carry out overvoltage protection to by measured motor, is then easy to cause tested motor damage, causes unnecessary loss when input voltage is too high.
Summary of the invention
The Motor Measuring System that the object of the invention is to overcome system does not carry out overvoltage protection to by measured motor; then be easy to the defect causing tested motor damage when input voltage is too high, a kind of test rotating speed automatic adjustment Motor Measuring System based on voltage detecting is provided.
Object of the present invention is achieved through the following technical solutions: based on the test rotating speed automatic adjustment Motor Measuring System of voltage detecting, by single-chip microcomputer, the tach signal collecting unit be connected with single-chip microcomputer respectively, variable-frequency motor control module, output display unit and operating unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, the Overvoltage protecting unit be connected with variable-frequency motor, and the power supply be connected with Overvoltage protecting unit forms, described variable-frequency motor is also connected with variable-frequency motor control module, described Overvoltage protecting unit is by triode VT4, triode VT5, field effect transistor MOS, negative pole is connected with the base stage of triode VT4, the electric capacity C2 that positive pole is then connected with the drain electrode of field effect transistor MOS, one end is connected with the drain electrode of field effect transistor MOS, the other end is then in turn through potentiometer R9, the resistance R11 be connected with the emitter of triode VT4 after resistance R10 and resistance R8, one end is connected with the drain electrode of field effect transistor MOS, the other end is the resistance R12 of ground connection after resistance R13 then, N pole is connected with the grid of field effect transistor MOS, the diode D3 that P pole is then connected with the tie point of resistance R13 with resistance R12, one end is connected with the P pole of diode D3, the resistance R14 that the other end is then connected with the collector of triode VT5, and positive pole is connected with the grid of field effect transistor MOS, the electric capacity C3 of minus earth forms, the output terminal that input end is connected with power supply, its source electrode then forms this Overvoltage protecting unit that the drain electrode of described field effect transistor MOS forms this Overvoltage protecting unit is connected with variable-frequency motor, the collector of described triode VT4 is connected with the tie point of potentiometer R9 with the drain electrode of field effect transistor MOS and resistance R11 simultaneously, the control end of potentiometer R9 is then connected with the collector of triode VT4, the base stage of described triode VT5 is connected with the tie point of potentiometer R9 with resistance R11, its grounded emitter, the tie point ground connection of described resistance R8 and resistance R10.
Further, described tach signal collecting unit by being arranged on by the speed probe in the rotating shaft of measured motor, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms; Described Acquisition Circuit is also connected with single-chip microcomputer.
Described Acquisition Circuit is by triode VT1, amplifier P1, positive pole is ground connection after voltage stabilizing diode D2, the electric capacity C1 of minus earth, P pole is connected with the output terminal of speed probe, N pole is then in turn through diode D1 that resistance R2 is connected with the negative pole of electric capacity C1 after resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, be serially connected in the resistance R7 between the positive pole of amplifier P1 and output terminal, and forward end is connected with the output terminal of amplifier P1, the polarity-inverting amplifier P2 that backward end then forms the output terminal of this tach signal collecting unit forms, while the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1, the output terminal of described tach signal collecting unit is connected with single-chip microcomputer.
Described constant-current source circuit by triode VT2, triode VT3, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn forms; The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3; The base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2; The tie point of described resistance R4 and resistance R5 connects 5V voltage.
Described triode VT1, triode VT2 and triode VT3 all adopt NPN type triode.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can adjust by the rotating speed of measured motor fast in test process, to test by the parameter of measured motor under different rotating speeds, improves the efficiency of electromechanical testing.
(2) speed probe of the present invention is highly sensitive, can collect the very first time by the real-time rotate speed signal of measured motor, avoid signal to incur loss through delay and bring impact to test result.
(3) the present invention is provided with Overvoltage protecting unit; it can detect by the operating voltage of measured motor and variable-frequency motor; when overtension, it can block the working power by measured motor and variable-frequency motor, avoids being subject to superpotential by measured motor and variable-frequency motor and damaging.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is the circuit structure diagram of tach signal collecting unit of the present invention.
Fig. 3 is the circuit structure diagram of Overvoltage protecting unit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the test rotating speed automatic adjustment Motor Measuring System based on voltage detecting that the present invention surveys, by single-chip microcomputer, the tach signal collecting unit be connected with single-chip microcomputer respectively, variable-frequency motor control module, output display unit and operating unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, the Overvoltage protecting unit be connected with variable-frequency motor, and the power supply be connected with Overvoltage protecting unit forms; Described variable-frequency motor is also connected with variable-frequency motor control module.
Wherein, power supply is used for providing working power to variable-frequency motor and by measured motor, and Overvoltage protecting unit, then for detecting the voltage that power supply exports, then can block variable-frequency motor and by the power supply of measured motor when overtension.This variable-frequency motor is then for driving tested electric machine rotation.The instruction of variable-frequency motor control module then for sending according to single-chip microcomputer controls variable-frequency motor, controls by the rotating speed of measured motor to reach.Tach signal collecting unit is then for gathering by the real-time rotate speed signal of measured motor.Output display unit is used for showing intuitively by the real-time rotate speed of measured motor, and tester can assess by the performance of measured motor according to by the real-time rotate speed of measured motor, and this output display unit can adopt traditional display to realize.Operating unit is as human-computer exchange window, and tester can by it to single-chip microcomputer input control parameter.Single-chip microcomputer is then as control center of the present invention, it is analyzed for the controling parameters inputted tester, and sending steering order to variable-frequency motor control module, its tach signal that can also collect tach signal collecting unit is analyzed and exports to output display unit simultaneously.
As shown in Figure 2, it is by speed probe for the structure of this tach signal collecting unit, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms.
Described Acquisition Circuit is by triode VT1, and amplifier P1, resistance R1, resistance R2, resistance R3, resistance R7, polarity-inverting amplifier P2, electric capacity C1, diode D1 and voltage stabilizing diode D2 form.Constant-current source circuit is then by triode VT2, and triode VT3, resistance R4, resistance R5 and resistance R6 form.
Wherein, one end of resistance R4 is connected with the base stage of triode VT2, its other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn.The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3.The tie point of described resistance R4 and resistance R5 connects 5V voltage, provides operating voltage for giving tach signal collecting unit.
In addition, positive pole ground connection, its minus earth after voltage stabilizing diode D2 of electric capacity C1, the P pole of diode D1 is connected with the output terminal of speed probe, its N pole is then connected with the negative pole of electric capacity C1 after resistance R3 through resistance R2 in turn, and the base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2.One end of resistance R1 is connected with the base stage of triode VT1, its other end is then connected with the P pole of diode D1, between the positive pole that resistance R7 is then serially connected in amplifier P1 and output terminal, the output terminal that the forward end of polarity-inverting amplifier P2 is connected with the output terminal of amplifier P1, its backward end then forms this tach signal collecting unit is connected with single-chip microcomputer.While the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1.In order to reach better implementation result, the RS-3102 type piezoelectric sensor for measuring rotational speed that this speed probe preferentially adopts Beijing Tuo Puruisheng observation and control technology company limited to produce realizes.Described triode VT1, triode VT2 and triode VT3 then all preferentially adopt NPN type triode to realize.
As shown in Figure 3, it is by triode VT4, triode VT5, field effect transistor MOS, electric capacity C2, electric capacity C3, diode D3, resistance R8, potentiometer R9, resistance R10, resistance R11, resistance R12 for the structure of described Overvoltage protecting unit, and resistance R13 and resistance R14 forms.
During connection, the negative pole of electric capacity C2 is connected with the base stage of triode VT4, its positive pole is then connected with the drain electrode of field effect transistor MOS, one end of resistance R11 is connected with the drain electrode of field effect transistor MOS, its other end is then in turn through potentiometer R9, be connected with the emitter of triode VT4 after resistance R10 and resistance R8, one end of resistance R12 is connected with the drain electrode of field effect transistor MOS, its other end is ground connection after resistance R13 then, the N pole of diode D3 is connected with the grid of field effect transistor MOS, its P pole is then connected with the tie point of resistance R13 with resistance R12, one end of resistance R14 is connected with the P pole of diode D3, its other end is then connected with the collector of triode VT5, the positive pole of electric capacity C3 is connected with the grid of field effect transistor MOS, its minus earth.
Meanwhile, the output terminal that input end is connected with power supply, its source electrode then forms this Overvoltage protecting unit that the drain electrode of described field effect transistor MOS forms this Overvoltage protecting unit is connected with variable-frequency motor.The collector of described triode VT4 is connected with the tie point of potentiometer R9 with the drain electrode of field effect transistor MOS and resistance R11 simultaneously.The control end of potentiometer R9 is then connected with the collector of triode VT4.The base stage of described triode VT5 is connected with the tie point of potentiometer R9 with resistance R11, its grounded emitter; The tie point ground connection of described resistance R8 and resistance R10.Structure thus, this resistance R8, potentiometer R9, resistance R10, resistance R11, electric capacity C2 and triode VT4 then form a sample circuit, and it is sampled to voltage signal.Resistance R12; resistance R13; resistance R14; electric capacity C3, diode D3, triode VT5 and field effect transistor MOS then form a protection circuit; when voltage is normal; this field effect transistor MOS conducting, when overtension, its cut-off, then can protect thus and do not damaged by high voltage by measured motor and variable-frequency motor.
As mentioned above, just well the present invention can be implemented.
Claims (5)
1. based on the test rotating speed automatic adjustment Motor Measuring System of voltage detecting, it is characterized in that, by single-chip microcomputer, the tach signal collecting unit be connected with single-chip microcomputer respectively, variable-frequency motor control module, output display unit and operating unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, the Overvoltage protecting unit be connected with variable-frequency motor, and the power supply be connected with Overvoltage protecting unit forms, described variable-frequency motor is also connected with variable-frequency motor control module, described Overvoltage protecting unit is by triode VT4, triode VT5, field effect transistor MOS, negative pole is connected with the base stage of triode VT4, the electric capacity C2 that positive pole is then connected with the drain electrode of field effect transistor MOS, one end is connected with the drain electrode of field effect transistor MOS, the other end is then in turn through potentiometer R9, the resistance R11 be connected with the emitter of triode VT4 after resistance R10 and resistance R8, one end is connected with the drain electrode of field effect transistor MOS, the other end is the resistance R12 of ground connection after resistance R13 then, N pole is connected with the grid of field effect transistor MOS, the diode D3 that P pole is then connected with the tie point of resistance R13 with resistance R12, one end is connected with the P pole of diode D3, the resistance R14 that the other end is then connected with the collector of triode VT5, and positive pole is connected with the grid of field effect transistor MOS, the electric capacity C3 of minus earth forms, the output terminal that input end is connected with power supply, its source electrode then forms this Overvoltage protecting unit that the drain electrode of described field effect transistor MOS forms this Overvoltage protecting unit is connected with variable-frequency motor, the collector of described triode VT4 is connected with the tie point of potentiometer R9 with the drain electrode of field effect transistor MOS and resistance R11 simultaneously, the control end of potentiometer R9 is then connected with the collector of triode VT4, the base stage of described triode VT5 is connected with the tie point of potentiometer R9 with resistance R11, its grounded emitter, the tie point ground connection of described resistance R8 and resistance R10.
2. the test rotating speed automatic adjustment Motor Measuring System based on voltage detecting according to claim 1, it is characterized in that: described tach signal collecting unit is by being arranged on by the speed probe in the rotating shaft of measured motor, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms; Described Acquisition Circuit is also connected with single-chip microcomputer.
3. the test rotating speed automatic adjustment Motor Measuring System based on voltage detecting according to claim 2, it is characterized in that: described Acquisition Circuit is by triode VT1, amplifier P1, positive pole is ground connection after voltage stabilizing diode D2, the electric capacity C1 of minus earth, P pole is connected with the output terminal of speed probe, N pole is then in turn through diode D1 that resistance R2 is connected with the negative pole of electric capacity C1 after resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, be serially connected in the resistance R7 between the positive pole of amplifier P1 and output terminal, and forward end is connected with the output terminal of amplifier P1, the polarity-inverting amplifier P2 that backward end then forms the output terminal of this tach signal collecting unit forms, while the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1, the output terminal of described tach signal collecting unit is connected with single-chip microcomputer.
4. the test rotating speed automatic adjustment Motor Measuring System based on voltage detecting according to claim 3, it is characterized in that: described constant-current source circuit is by triode VT2, triode VT3, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn forms; The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3; The base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2; The tie point of described resistance R4 and resistance R5 connects 5V voltage.
5. the test rotating speed automatic adjustment Motor Measuring System based on voltage detecting according to claim 4, is characterized in that: described triode VT1, triode VT2 and triode VT3 all adopt NPN type triode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818848.XA CN105277756A (en) | 2015-11-21 | 2015-11-21 | Testing rotating speed automatic adjustment type motor test system on the basis of voltage detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818848.XA CN105277756A (en) | 2015-11-21 | 2015-11-21 | Testing rotating speed automatic adjustment type motor test system on the basis of voltage detection |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532914A (en) * | 2009-04-09 | 2009-09-16 | 吉林大学 | Hardware-in-loop test bed of hybrid car brake coordination control system |
| CN101968531A (en) * | 2010-09-29 | 2011-02-09 | 广州中船黄埔造船有限公司 | Load cabinet system |
| CN104779890A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Energy-saving type motor control system based on accurate control of motor rotating speed |
| CN104883079A (en) * | 2014-11-26 | 2015-09-02 | 成都冠深科技有限公司 | Wide-pulse trigger type power supply automatic switching system with overvoltage and overcurrent protection |
-
2015
- 2015-11-21 CN CN201510818848.XA patent/CN105277756A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532914A (en) * | 2009-04-09 | 2009-09-16 | 吉林大学 | Hardware-in-loop test bed of hybrid car brake coordination control system |
| CN101968531A (en) * | 2010-09-29 | 2011-02-09 | 广州中船黄埔造船有限公司 | Load cabinet system |
| CN104883079A (en) * | 2014-11-26 | 2015-09-02 | 成都冠深科技有限公司 | Wide-pulse trigger type power supply automatic switching system with overvoltage and overcurrent protection |
| CN104779890A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Energy-saving type motor control system based on accurate control of motor rotating speed |
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Application publication date: 20160127 |