CN103432724A - Speed adjustment system of electric running machine - Google Patents
Speed adjustment system of electric running machine Download PDFInfo
- Publication number
- CN103432724A CN103432724A CN2013103980933A CN201310398093A CN103432724A CN 103432724 A CN103432724 A CN 103432724A CN 2013103980933 A CN2013103980933 A CN 2013103980933A CN 201310398093 A CN201310398093 A CN 201310398093A CN 103432724 A CN103432724 A CN 103432724A
- Authority
- CN
- China
- Prior art keywords
- voltage
- pwm
- speed
- input end
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The invention relates to a speed adjustment system of an electric running machine. A speed detection circuit, a current detection circuit and a voltage change detection circuit are respectively used for detecting a speed signal, a current signal and a voltage signal and sending the signals to a singlechip system; after processing the detected signals, the singlechip system outputs a PWM (pulse width modulation) signal and controls a driving motor to run through a PWM driver; the PWM driver is connected with an output of a PWM comparator in the singlechip system to supply a voltage value for speed conversion, a motor voltage feedback value, a current compensation value and a -5V voltage value and is connected with an inverted input end of the PWM comparator; the in-phase input end of an operational amplifier is grounded through a balance resistor; a feedback resistor and a capacitor are connected in series with each other and then are connected in parallel to the inverted input end and the output end of the operational amplifier; the inverted input end and the output end of the operational amplifier are connected in parallel with a voltage stabilization diode. By additionally arranging a PI adjuster, the system can dynamically correct a suddenly changed load, and therefore, unnecessary loss caused by a reason that moving speeds of feet are not matched with the speed of a running belt under a starting condition and a special condition is avoided.
Description
Technical field
The present invention relates to a kind of governing system, particularly a kind of treadmill governing system.
Background technology
The DC brush governing system is simple with its control circuit, speed-regulating range width, control performance that overload capacity is larger and excellent are widely used in all kinds of treadmill products.At present, treadmill still be take and brushless motor is arranged as main with drive motors both at home and abroad, adopts the irreversible PWM system of dc motor.Can be adjusted at any time various setting speeds, treadmill user setting speed, treadmill has speed measuring device, after being recorded, speed send controller, the adjustment of load corresponding speed that controller brings according to running of user again, and conventional speed, curtage feedback method for control are controlled, dynamic response is very fast, cause the translational speed of pin lower than treadmill belt speed, when particularly at the early-stage the and later stage is tired, easily cause injury gained in sports.
Summary of the invention
The present invention be directed to treadmill governing system speed responsive too fast, easily cause the problem of injury gained in sports during load changing, a kind of treadmill governing system has been proposed, increase dynamic calibration to governing system, do not cause damage to overcome in the middle of running because the translational speed of pin catches up with treadmill belt speed, speed still equally responds when normal and the accident brought during load changing.
Technical scheme of the present invention is: a kind of treadmill governing system, velocity checking circuits, current detection circuit, the voltage change testing circuit is the detection speed signal respectively, current signal and voltage signal send SCM system, after SCM system is processed detection signal, output pwm signal drives and controls the drive motors running by PWM, PWM drives and connects PWM comparator output in SCM system, the magnitude of voltage of given speed conversion, the motor voltage value of feedback, current offset values,-5V magnitude of voltage also connects PWM comparator inverting input, the operational amplifier in-phase input end is by balance resistance ground connection, after feedback resistance and capacitances in series and on operational amplifier reverse input end and output, a Zener diode in parallel on operational amplifier reverse input end and output.
Described SCM system is selected PWM integrated chip SG3525.
Described Zener diode is selected IN4728.
Beneficial effect of the present invention is: treadmill governing system of the present invention, in the brush direct current motor control system that definite voltage negative feedback current compensates in routine, characteristics according to load changing, increase pi regulator the sudden change load is carried out to dynamic calibration, avoided due to starting and in particular cases, because the translational speed of pin causes unnecessary damage while not mating with treadmill belt speed.
The accompanying drawing explanation
Fig. 1 is the motor speed of the present invention response curve desirable to load changing;
Fig. 2 is proportional and integral controller line map of the present invention;
Fig. 3 is treadmill speed regulating control block diagram of the present invention;
Fig. 4 is the alignment circuit figure that band PI of the present invention regulates.
The specific embodiment
The motor speed response curve desirable to load changing, do the used time in impact load as shown in Figure 1, and the output speed of motor reduced before this, and then slowly reach the speed needed, and reduces the impact to human body.
For the treadmill rapid dynamic response speed, the steady state speed required precision is not high, can adopt PWM integrated chip SG3525 and related elements to form the armature voltage feedback, and the irreversible PWM Direct Current Governor System that electric current supplements, to load I
dLduring sudden change, be to need the speed exporting change that one buffering is arranged, so system is made to a dynamic calibration, select pi regulator to do correction to governing system.
Proportional and integral controller line map as shown in Figure 2, pi regulator belongs to lets out post-equalization, can guarantee stable state accuracy, the rapidity of restriction response simultaneously.U
inand U
cthe absolute value that means respectively adjuster input and input voltage, R
ba1for the balance resistance of operational amplifier in-phase input end, feedback resistance R1 and capacitor C 1 series connection on operational amplifier reverse input end and output.Pi regulator rate mu-factor K
p=R
1/ R
0, the integration time constant T of pi regulator
pi=R
1c
1.
As impact input U
inthe time, output voltage U
cat first sudden change is to K
pu
c, guaranteed certain response speed, but K
pbe to be less than the desired rate mu-factor of Static control property index, so rapidity is depressed, brings metastable assurance.In transient process, capacitor C
1constant-current charge, realize integral action, makes U
clinear growth, be equivalent in dynamically, amplification coefficient be improved gradually, finally meets the requirement of stable state accuracy.If input voltage exists always, capacitor C
1just constantly charging, constantly carry out integration, until voltage U
creach the amplitude limit value of operational amplifier, i.e. the saturation value of operational amplifier.
Treadmill speed regulating control block diagram as shown in Figure 3, velocity checking circuits 1, current detection circuit 2, voltage change testing circuit 3 detection signals send SCM system 4, SCM system 4 is according to detection signal, and output pwm signal drives 5 to control drive motors 6 runnings by PWM.In the SCM system 4 here, the PWM comparator is arranged, speed detection 1, current detecting 2 and voltage change detect 3 signals inputs and drive 5 through the PWM comparator output signals to PWM.
As Fig. 4 is the alignment circuit figure regulated with PI, U
nthe magnitude of voltage of given speed conversion, U
dthe motor voltage value of feedback, I
dr
sbe current offset values, add-5V of input voltage when preventing from not having given voltage input, is avoided amplifier null offset or produces disturbing the false triggering signal, and serial Feedback resistance R on operational amplifier reverse input end and output
1and capacitor C
1on a Zener diode IN4728 in parallel again, by this forward conduction voltage amplitude limit value.
In the control system that definite voltage negative feedback current compensates in routine, characteristics according to load changing, increase pi regulator the sudden change load is carried out to dynamic calibration, avoided due to starting and in particular cases, because the translational speed of pin causes unnecessary damage while not mating with treadmill belt speed.
Claims (3)
1. a treadmill governing system, velocity checking circuits, current detection circuit, the voltage change testing circuit is the detection speed signal respectively, current signal and voltage signal send SCM system, after SCM system is processed detection signal, output pwm signal drives and controls the drive motors running by PWM, PWM drives and connects PWM comparator output in SCM system, it is characterized in that, the magnitude of voltage of given speed conversion, the motor voltage value of feedback, current offset values,-5V magnitude of voltage also connects PWM comparator inverting input, the operational amplifier in-phase input end is by balance resistance ground connection, after feedback resistance and capacitances in series and on operational amplifier reverse input end and output, a Zener diode in parallel on operational amplifier reverse input end and output.
2. treadmill governing system according to claim 1, is characterized in that, described SCM system is selected PWM integrated chip SG3525.
3. treadmill governing system according to claim 1, is characterized in that, described Zener diode is selected IN4728.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103980933A CN103432724A (en) | 2013-09-04 | 2013-09-04 | Speed adjustment system of electric running machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103980933A CN103432724A (en) | 2013-09-04 | 2013-09-04 | Speed adjustment system of electric running machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103432724A true CN103432724A (en) | 2013-12-11 |
Family
ID=49686497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103980933A Pending CN103432724A (en) | 2013-09-04 | 2013-09-04 | Speed adjustment system of electric running machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103432724A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126302A (en) * | 2015-09-02 | 2015-12-09 | 江苏康力源健身器材有限公司 | Running machine adapted to speed of runner automatically |
| CN105396261A (en) * | 2015-12-18 | 2016-03-16 | 柳时栋 | Intelligent treadmill and control method thereof |
| CN106017501A (en) * | 2016-05-13 | 2016-10-12 | 上海捍康健康管理有限公司 | Method for calculating running mileage of user on running machine |
| CN108096773A (en) * | 2017-12-26 | 2018-06-01 | 宁波景安信息技术有限公司 | A kind of speed control system of treadmill |
-
2013
- 2013-09-04 CN CN2013103980933A patent/CN103432724A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126302A (en) * | 2015-09-02 | 2015-12-09 | 江苏康力源健身器材有限公司 | Running machine adapted to speed of runner automatically |
| CN105396261A (en) * | 2015-12-18 | 2016-03-16 | 柳时栋 | Intelligent treadmill and control method thereof |
| CN106017501A (en) * | 2016-05-13 | 2016-10-12 | 上海捍康健康管理有限公司 | Method for calculating running mileage of user on running machine |
| CN108096773A (en) * | 2017-12-26 | 2018-06-01 | 宁波景安信息技术有限公司 | A kind of speed control system of treadmill |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4924086B2 (en) | Semiconductor device | |
| US9007033B2 (en) | Battery temperature detection and parasitic resistance compensation system | |
| CN103432724A (en) | Speed adjustment system of electric running machine | |
| US10203710B2 (en) | Voltage regulator with output capacitor measurement | |
| US20140186156A1 (en) | Fan control circuit and system | |
| US20140145696A1 (en) | Current Control Semiconductor Device and Control Device Using the Same | |
| US20120194947A1 (en) | Voltage regulator | |
| CN110031757B (en) | Method for rapidly detecting locked rotor of motor closed-loop system | |
| CN203011991U (en) | Current sampling circuit and motor | |
| CN101738588A (en) | Sensor circuit | |
| TW201518896A (en) | Voltage regulator apparatus, and associated method | |
| CN103080863B (en) | Semiconductor element for current control, and control device using same | |
| CN102957373A (en) | Drive signal generating circuit | |
| CN107102668A (en) | Low pressure difference linear voltage regulator | |
| CN103616921A (en) | Control circuit of low-pressure-drop voltage stabilizer | |
| CN111367346A (en) | Voltage stabilizing circuit, power supply and electric equipment | |
| CN104539245A (en) | Self-zeroing circuit of operational amplifier | |
| US9590487B2 (en) | Method and circuit for reducing ripple of current output by current source | |
| CN103684147A (en) | Continuous current dynamo speed derivative feedback control device and method | |
| CN106249040B (en) | Wide-range dynamic voltage measuring circuit and method | |
| CN112859985B (en) | Current limiting circuit of high-voltage large-current linear voltage stabilizer and implementation method | |
| US20140049234A1 (en) | Regulator for controlling output voltage | |
| CN205121401U (en) | Electric current source suitable for big current power device testing arrangement | |
| CN102620876B (en) | Dynamometer system of vehicle chassis dynamometer | |
| CN106020278B (en) | The accurate temperature controlling circuit of Flouride-resistani acid phesphatase infrared detector refrigeration motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131211 |